A spiral staircase formwork system with an adjustable center point bracket

Abstract

This utility model discloses an adjustable center point bracket for a spiral staircase formwork system, belonging to the field of building construction. It solves the problems of poor elevation accuracy, slow construction progress, and easy loosening in existing concrete spiral staircase formwork erection methods. This utility model includes a central column and multiple combined units. Each combined unit consists of an inner cylinder and a bracket. The bracket includes an outer sleeve and a support. The support is connected to the outer wall of the outer sleeve. The inner wall of the outer sleeve has internal threads, and the outer wall of the inner cylinder has external threads. The outer sleeve and the inner cylinder are connected by mutually mating internal and external threads. Multiple combined units are sequentially fitted onto the central column. This utility model uses the connection between the inner cylinder and the bracket through internal and external threads, and the height of the combined units can be adjusted through these threads. The units are arranged sequentially according to the design angle to form a stable support system, achieving high-precision control of the formwork elevation and convenient installation.

Description

Technical Field

[0001] This utility model belongs to the field of building construction, specifically relating to an adjustable bracket for the center point of a spiral staircase formwork system. Background Technology

[0002] In building structural engineering construction, spiral staircases are sometimes designed due to space constraints. In some projects, given the complexity of spiral staircases, the original concrete staircases are replaced with steel structures to reduce construction difficulty. However, in some special environments, such as high humidity or harsh climates, the durability of steel structural components may not meet requirements, necessitating the use of concrete staircases. Current methods for erecting concrete spiral staircase formwork involve erecting a steel pipe at the center and using fasteners and wires to fix wooden joists according to the height of each step to determine the elevation of each step. Secondary joists and formwork are then placed on top of the wooden joists. This method suffers from inconsistent elevation accuracy, slow construction progress, and a tendency to loosen and destabilize the formwork. Therefore, a support device that allows for precise height adjustment, ensures formwork stability, and facilitates convenient and quick construction is needed to meet the construction requirements of spiral concrete staircases. Utility Model Content

[0003] The purpose of this invention is to provide an adjustable bracket for the center point of a spiral staircase formwork system, in order to solve the problems of poor elevation accuracy, slow construction progress, and easy loosening in existing concrete spiral staircase formwork erection methods.

[0004] The technical solution of this utility model is: a spiral staircase frame system with an adjustable center point bracket, including a central column and multiple combined units. Each combined unit consists of an inner cylinder and a bracket. The bracket includes an outer sleeve and a support. The support is connected to the outer wall of the outer sleeve. The inner wall of the outer sleeve is provided with an internal thread, and the outer wall of the inner cylinder is provided with an external thread. The outer sleeve and the inner cylinder are connected by mutually cooperating internal and external threads. Multiple combined units are sequentially sleeved on the central column.

[0005] As a further improvement of this utility model, a stiffening plate is provided between the outer tube and the support.

[0006] As a further improvement of this utility model, at least one twist handle is provided at the lower end of the outer wall of the inner cylinder.

[0007] The beneficial effects of this utility model are as follows: This utility model uses an inner cylinder and a bracket connected by internal and external threads, and the height of the combined unit is adjusted by the internal and external threads; multiple combined units are inserted into the central column and arranged from bottom to top. The height of the combined units is precisely adjusted according to the height of the spiral staircase steps, and they are arranged in sequence according to the design angle. The main keel is placed on the support of the bracket, and the other end of the main keel is connected to the support pole on the outside of the spiral staircase, thereby forming a stable support system and achieving the characteristics of high-precision control of the formwork elevation and convenient installation. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of this utility model;

[0009] Figure 2 This is a schematic diagram of the structure of the combined unit in this utility model;

[0010] Figure 3 This is a schematic diagram of the inner cylinder structure in this utility model;

[0011] Figure 4 This is a schematic diagram of the bracket structure in this utility model.

[0012] In the diagram: 1-Inner cylinder; 101-External thread; 103-Torture handle; 2-Bracket; 201-Internal thread; 202-Outer sleeve; 203-Stiffening plate; 204-Support; 3-Center column; 4-Main keel. Detailed Implementation

[0013] The present invention will now be described in detail with reference to the accompanying drawings.

[0014] like Figure 1-4 As shown, a spiral staircase frame system with an adjustable center point bracket includes a central column 3 and multiple combined units. Each combined unit consists of an inner cylinder 1 and a bracket 2. The bracket 2 includes an outer sleeve 202 and a support 204. The support 204 is U-shaped and connected to the outer wall of the outer sleeve 202. The inner wall of the outer sleeve 202 is provided with an internal thread 201, and the outer wall of the inner cylinder 1 is provided with an external thread 101. The outer sleeve 202 and the inner cylinder 1 are connected by the mutually cooperating internal thread 201 and external thread 101. Multiple combined units are sequentially sleeved on the central column 3.

[0015] A stiffening plate 203 is provided between the outer tube 202 and the support 204.

[0016] At least one torsion handle 103 is provided at the lower end of the outer wall of the inner cylinder 1.

[0017] Example 1

[0018] The inner cylinder 1 is made of steel pipe, with external threads 101 cut into the outer wall, and two twist handles 103 welded to the lower part of the inner cylinder 1.

[0019] The outer tube 202 is made of steel and has internal threads 201 cut into its inner wall. Two stiffening plates 203 are welded to one side of the outer tube 202, and a support 204 is welded to the top of the stiffening plate 203. The side of the support 204 is welded to the outer tube 202 to form the bracket 2.

[0020] The central column 3 is made of φ48 steel pipe.

[0021] The upper part of the inner cylinder 1 is screwed into the outer sleeve 202 through the mating internal threads 201 and external threads 101, forming a combined unit. The height of the combined unit is roughly adjusted according to the designed stair tread height. Then, the inner cylinders 1 and brackets 2 of multiple combined units are fitted onto the central column 3 located at the center of the spiral staircase. The direction of each support 204 is adjusted according to the angle corresponding to each tread, while the height of the combined unit is finely adjusted. Finally, the main keel 4 is placed on the supports 204 one by one, and the other side of the main keel 4 is connected to the formwork uprights on the outside of the spiral staircase, completing the scaffolding construction.

Claims

1. A helical stair formwork system center point adjustable bracket comprising a center column, characterized in that: It also includes multiple combination units, each combination unit consists of an inner cylinder (1) and a bracket (2). The bracket (2) includes an outer tube (202) and a support (204). The support (204) is connected to the outer wall of the outer tube (202). The inner wall of the outer tube (202) is provided with an internal thread (201), and the outer wall of the inner cylinder (1) is provided with an external thread (101). The outer tube (202) and the inner cylinder (1) are connected by the mutually cooperating internal thread (201) and external thread (101). Multiple combination units are sequentially sleeved on the central column (3).

2. A center point adjustable bracket for a helical stair formwork system according to claim 1, characterized in that: A stiffening plate (203) is provided between the outer tube (202) and the support (204).

3. A center point adjustable bracket for a helical stair formwork system according to claim 1 or 2, characterized in that: At least one torsion handle (103) is provided at the lower end of the outer wall of the inner cylinder (1).

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