Assembled steel stair

Abstract

The utility model relates to the technical field of building stairs, in particular to an assembly type steel stair which comprises a stair beam structure, a stair step structure and a guardrail structure, the stair beam structure comprises a lower horizontal stair beam section, an inclined stair beam section and an upper horizontal stair beam section which are sequentially connected together, and the stair step structure comprises a plurality of stair step assemblies. The ladder step assemblies are arranged on the inclined ladder beam section in parallel at intervals, the guardrail structures are arranged on the two sides of the inclined ladder beam section, the ladder step assemblies are detachably arranged on the inclined ladder beam section through first connecting bolts, and the guardrail structures are detachably arranged on the two sides of the inclined ladder beam section through second connecting bolts. When the fabricated steel stair is constructed on site, installation construction can be completed only by installing the stair step assemblies on the inclined stair beam section through the first connecting bolts and installing the guardrail structures on the two sides of the inclined stair beam section through the second connecting bolts, a large amount of welding operation is not needed any more, the labor intensity of construction is reduced, and the construction efficiency is improved. The construction quality is guaranteed, and the construction efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of building stairs, in particular to an assembled steel staircase. Background Art

[0002] Steel stairs are an important part of steel structure buildings and can also be used as an important escape route in the event of an accident. At present, the existing steel staircase installation includes a ladder beam structure, a step structure and a guardrail structure. The ladder beam structure includes a lower horizontal ladder beam section, an inclined ladder beam section and an upper horizontal ladder beam section connected in sequence. At the construction site, the step structure and the guardrail structure are installed on the inclined ladder beam section by welding. The construction workers have a large workload of welding on site, and the labor intensity is high, which is not conducive to ensuring the quality of construction. It is also very inconvenient to disassemble, which affects the secondary use. Utility Model Content

[0003] The technical problem solved by the utility model is to provide an assembled steel staircase which has low construction labor intensity and is convenient to disassemble.

[0004] The utility model solves the technical problem by adopting the following technical scheme: an assembled steel staircase comprises a ladder beam structure, a step structure and a guardrail structure, the ladder beam structure comprises a lower horizontal ladder beam section, an inclined ladder beam section and an upper horizontal ladder beam section which are sequentially connected together, the step structure comprises a plurality of ladder step assemblies, all of which are arranged in parallel and spaced relation on the inclined ladder beam section, the guardrail structure is arranged on both sides of the inclined ladder beam section, the step assemblies are detachably arranged on the inclined ladder beam section by means of a first connecting bolt, and the guardrail structure is detachably arranged on both sides of the inclined ladder beam section by means of a second connecting bolt;

[0005] The guardrail structure includes at least two groups of supporting column units and a plurality of railings. The supporting column unit includes a base, a column and a connecting sleeve. The base is detachably connected to the inclined ladder beam section through a second connecting bolt, and the base is inclined. The inclination angle of the base is the same as the inclination angle of the inclined ladder beam section.

[0006] The column is vertically arranged on the base, and at least one connecting sleeve is respectively arranged on the left and right sides of the column. The connecting sleeves are arranged at intervals along the height direction of the column, and the connecting sleeves are arranged obliquely, and the inclination angle of the connecting sleeves is the same as the inclination angle of the inclined ladder beam section;

[0007] The two ends of the handrail are respectively inserted into the connecting sleeves in the two groups of supporting column units, so that the two groups of safety supporting column units are detachably connected together.

[0008] Furthermore, the lower horizontal ladder beam section is detachably connected to the lower end of the inclined ladder beam section, and the upper horizontal ladder beam section is detachably connected to the upper end of the inclined ladder beam section.

[0009] Furthermore, the ladder beam structure also includes an upper clamping plate and a lower clamping plate, an upper clamping groove is provided in the middle of the upper clamping plate, and a lower clamping groove is provided in the middle of the lower clamping plate;

[0010] The upper clamping plate is detachably connected to the upper horizontal ladder beam section via a third connecting bolt, and the lower clamping plate is detachably connected to the lower horizontal ladder beam section via a fourth connecting bolt.

[0011] Furthermore, the ladder step assembly includes a tread plate and a connecting plate, the tread plate is arranged on the connecting plate, and the connecting plate is detachably connected to the inclined ladder beam section through a first connecting bolt.

[0012] Furthermore, the tread plate includes an upper vertical section, a tread section and a lower vertical section, the lower end of the upper vertical section is vertically connected to one side of the tread section, and the upper end of the lower vertical section is vertically connected to the other side of the tread section;

[0013] The connecting plate comprises a horizontal supporting section and a vertical connecting section which are vertically connected together. The step section is arranged on the horizontal supporting section. The vertical connecting section is detachably connected to the inclined ladder beam section through a first connecting bolt.

[0014] Furthermore, a stiffening plate is provided between the horizontal supporting section and the vertical connecting section.

[0015] The beneficial effects of the utility model are as follows: the step assembly can be detachably mounted on the inclined ladder beam section through the first connecting bolt, and the guardrail structure can be detachably mounted on both sides of the inclined ladder beam section through the second connecting bolt. During the on-site construction of the assembled steel staircase of the utility model, the installation and construction can be completed by only installing the step assembly on the inclined ladder beam section through the first connecting bolt and installing the guardrail structure on both sides of the inclined ladder beam section through the second connecting bolt, and no large amount of welding operations are required, which reduces the labor intensity of the construction, helps to ensure the construction quality, and improves the construction efficiency; and, only the first connecting bolt and the second connecting bolt need to be loosened, and the step assembly and the guardrail structure can be disassembled from the inclined ladder beam section, which is convenient for disassembly and can be reused, has a simple structure, and is conducive to large-scale use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the assembled steel staircase of the utility model;

[0017] Figure 2 is a schematic diagram of the upper splint;

[0018] Figure 3 is a schematic side view of a ladder step assembly;

[0019] Figure 4 is a front view schematic diagram of a ladder step assembly;

[0020] Figure 5 is a schematic diagram of a supporting column unit;

[0021] Marked as: ladder beam structure 1, lower horizontal ladder beam section 11, inclined ladder beam section 12, upper horizontal ladder beam section 13, upper clamping plate 14, lower clamping plate 15, upper slot 16, guardrail structure 2, railing 21, base 22, column 23, connecting sleeve 24, ladder step assembly 3, tread 31, connecting plate 32, stiffening plate 33, first connecting bolt 4, second connecting bolt 5, upper supporting steel 6, lower supporting steel 7. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0023] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the utility model assembled steel staircase includes a ladder beam structure 1, a step structure and a guardrail structure 2. The ladder beam structure 1 includes a lower horizontal ladder beam section 11, an inclined ladder beam section 12, and an upper horizontal ladder beam section 13 connected together in sequence. The ladder step structure includes a plurality of ladder step assemblies 3. All ladder step assemblies 3 are arranged in parallel and spaced apart on the inclined ladder beam section 12. The guardrail structure 2 is arranged on both sides of the inclined ladder beam section 12. The ladder step assemblies 3 are detachably arranged on the inclined ladder beam section 12 by means of a first connecting bolt 4. The guardrail structure 2 is detachably arranged on both sides of the inclined ladder beam section 12 by means of a second connecting bolt 5.

[0024] During the on-site construction of the assembled steel staircase of the utility model, the installation and construction can be completed by only installing the step assembly 3 on the inclined ladder beam section 12 through the first connecting bolt 4 and installing the guardrail structure 3 on both sides of the inclined ladder beam section 12 through the second connecting bolt 5. No large amount of welding operations are required, which reduces the labor intensity of construction, helps to ensure the construction quality, and improves the construction efficiency. Moreover, only the first connecting bolt 4 and the second connecting bolt 5 need to be loosened, and the step assembly 3 and the guardrail structure 2 can be disassembled from the inclined ladder beam section 12, which is convenient for disassembly and can be reused. The structure is simple and is conducive to large-scale use.

[0025] The guardrail structure 2 plays a protective role. The guardrail structure 2 is installed on both sides of the inclined ladder beam section 12. In order to facilitate the installation of the guardrail structure 2, a preferred structure of the guardrail structure 2 of the utility model is: Figure 1 , Figure 4As shown, the guardrail structure 2 includes at least two groups of supporting column units and a plurality of handrails 21, the supporting column units include a base 22, a column 23 and a connecting sleeve 24, the base 22 is detachably connected to the inclined ladder beam section 12 through a second connecting bolt 5, and the base 22 is inclined, and the inclination angle of the base 22 is the same as the inclination angle of the inclined ladder beam section 12; the column 23 is vertically arranged on the base 22, and at least one connecting sleeve 24 is respectively arranged on the left and right sides of the column 23, and the connecting sleeve 24 is arranged at intervals along the height direction of the column 23, and the connecting sleeve 24 is inclined, and the inclination angle of the connecting sleeve 24 is the same as the inclination angle of the inclined ladder beam section 12; the two ends of the handrail 21 are respectively inserted into the connecting sleeves 24 in the two groups of supporting column units, so that the two groups of safety supporting column units are detachably connected together to form the guardrail structure 2. The guardrail structure 2 has a simple structure, is easy to install and disassemble, and can be reused twice.

[0026] Specifically, the lower horizontal ladder beam section 11 and the upper horizontal ladder beam section 13 are both arranged horizontally, and the lower ends of the lower horizontal ladder beam section 11 and the inclined ladder beam section 12 can be connected together by welding, and the upper horizontal ladder beam section 13 and the upper ends of the inclined ladder beam section 12 can also be connected together by welding, but this will increase the welding operation and increase the labor intensity of the construction. Therefore, in the utility model, the lower ends of the lower horizontal ladder beam section 11 and the inclined ladder beam section 12 are preferably detachably connected, and the upper horizontal ladder beam section 13 and the upper ends of the inclined ladder beam section 12 are preferably detachably connected, and the detachable connection method is through a connecting bolt.

[0027] When installing the assembled steel staircase, the lower horizontal ladder beam section 11 and the upper horizontal ladder beam section 13 are usually installed on the upper support steel 6 and the lower support steel 7. The upper support steel 6 and the lower support steel 7 are I-beams. In order to improve the connection strength between the lower horizontal ladder beam section 11 and the upper horizontal ladder beam section 13 and the upper support steel 6 and the lower support steel 7, Figure 1 , Figure 2 As shown, the ladder beam structure 1 also includes an upper clamping plate 14 and a lower clamping plate 15, an upper clamping groove 16 is provided in the middle of the upper clamping plate 14, and a lower clamping groove is provided in the middle of the lower clamping plate 15; the upper clamping plate 14 is detachably connected to the upper horizontal ladder beam section 13 through a third connecting bolt, and the lower clamping plate 15 is detachably connected to the lower horizontal ladder beam section 11 through a fourth connecting bolt. During installation, the flange plate of the upper supporting steel 6 and the connecting bottom plate of the upper horizontal ladder beam section 13 are clamped in the upper clamping groove 16, and the flange plate of the lower supporting steel 7 and the connecting bottom plate of the lower horizontal ladder beam section 11 are clamped in the lower clamping groove, which effectively improves the connection strength.

[0028] The step assembly 3 is arranged along the inclined ladder beam section 12. In order to facilitate the installation of the step assembly, it is arranged on the inclined ladder beam section 12. Figure 1 , Figure 3 , Figure 4As shown, the ladder step assembly 3 includes a tread plate 31 and a connecting plate 32, wherein the tread plate 31 is arranged on the connecting plate 32, and the connecting plate 32 is detachably connected to the inclined ladder beam section 12 through the first connecting bolt 4. The tread plate 31 is used as the main structure. In order to improve the use effect of the tread plate 31, a preferred structure of the tread plate 31 is as follows: the tread plate 31 includes an upper vertical section, a tread section and a lower vertical section, wherein the lower end of the upper vertical section is vertically connected to one side of the tread section, and the upper end of the lower vertical section is vertically connected to the other side of the tread section. The connecting plate 32 mainly plays a connecting role. In order to improve its use effect, a preferred structure of the connecting plate 32 is as follows: the connecting plate 32 includes a horizontal support section and a vertical connection section vertically connected together, wherein the tread section is arranged on the horizontal support section, and the vertical connection section is detachably connected to the inclined ladder beam section 12 through the first connecting bolt 4. In order to further improve the use effect of the connecting plate 32 and improve its strength, a stiffening plate 33 is arranged between the horizontal support section and the vertical connection section.

Claims

1. An assembled steel staircase, comprising a ladder beam structure (1), a step structure and a guardrail structure (2), wherein the ladder beam structure (1) comprises a lower horizontal ladder beam section (11), an inclined ladder beam section (12), and an upper horizontal ladder beam section (13) connected in sequence, the step structure comprises a plurality of ladder step assemblies (3), all the ladder step assemblies (3) are arranged in parallel and spaced relation on the inclined ladder beam section (12), and the guardrail structure (2) is arranged on both sides of the inclined ladder beam section (12), characterized in that: The step assembly (3) is detachably mounted on the inclined ladder beam section (12) via a first connection bolt (4), and the guardrail structure (2) is detachably mounted on both sides of the inclined ladder beam section (12) via a second connection bolt (5); The guardrail structure (2) comprises at least two groups of supporting column units and a plurality of handrails (21); the supporting column units comprise a base (22), a column (23) and a connecting sleeve (24); the base (22) is detachably connected to the inclined ladder beam section (12) via a second connecting bolt (5); the base (22) is arranged in an inclined manner; and the inclination angle of the base (22) is the same as the inclination angle of the inclined ladder beam section (12); The column (23) is vertically arranged on the base (22), and at least one connecting sleeve (24) is respectively arranged on the left and right sides of the column (23), and the connecting sleeves (24) are arranged at intervals along the height direction of the column (23), and the connecting sleeves (24) are arranged in an inclined manner, and the inclination angle of the connecting sleeves (24) is the same as the inclination angle of the inclined ladder beam section (12); The two ends of the handrail (21) are respectively inserted into the connecting sleeves (24) in the two groups of supporting column units, so that the two groups of safety supporting column units are detachably connected together.

2. The assembled steel staircase according to claim 1, characterized in that: The lower horizontal ladder beam section (11) is detachably connected to the lower end of the inclined ladder beam section (12), and the upper horizontal ladder beam section (13) is detachably connected to the upper end of the inclined ladder beam section (12).

3. The assembled steel staircase according to claim 1, characterized in that: The ladder beam structure (1) also includes an upper clamping plate (14) and a lower clamping plate (15); an upper clamping groove (16) is provided in the middle of the upper clamping plate (14), and a lower clamping groove is provided in the middle of the lower clamping plate (15); The upper clamping plate (14) is detachably connected to the upper horizontal ladder beam section (13) via a third connecting bolt, and the lower clamping plate (15) is detachably connected to the lower horizontal ladder beam section (11) via a fourth connecting bolt.

4. The assembled steel staircase according to any one of claims 1 to 3, characterized in that: The stair step assembly (3) comprises a tread plate (31) and a connecting plate (32), wherein the tread plate (31) is arranged on the connecting plate (32), and the connecting plate (32) is detachably connected to the inclined stair beam section (12) via a first connecting bolt (4).

5. The assembled steel staircase according to claim 4, characterized in that: The tread plate (31) comprises an upper vertical section, a tread section and a lower vertical section, wherein the lower end of the upper vertical section is vertically connected to one side of the tread section, and the upper end of the lower vertical section is vertically connected to the other side of the tread section; The connecting plate (32) comprises a horizontal supporting section and a vertical connecting section which are vertically connected together, the step section is arranged on the horizontal supporting section, and the vertical connecting section is detachably connected to the inclined ladder beam section (12) via a first connecting bolt (4).

6. The assembled steel staircase according to claim 5, characterized in that: A stiffening plate (33) is arranged between the horizontal supporting section and the vertical connecting section.

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