Prefabricated stair structure

Abstract

The utility model discloses a prefabricated stair structure which comprises a steel reinforcement framework and a concrete layer arranged on the steel reinforcement framework, the steel reinforcement framework comprises a plurality of bottom plate longitudinal bars arranged in parallel, and each bottom plate longitudinal bar comprises an inclined bar body and horizontal bar bodies arranged at the upper end and the lower end of the inclined bar body. A plurality of bottom plate transverse ribs are arranged on the bottom plate longitudinal ribs in the length direction, reinforcing rib bodies are arranged over the two ends of the bottom plate longitudinal ribs and comprise horizontal reinforcing ribs and inclined reinforcing ribs, and the concrete layer comprises a stair body and horizontal installation parts located at the two ends of the stair body. A mounting sleeve is embedded in the horizontal mounting part in a penetrating manner, a counter bore is formed in the mounting sleeve, and guardrail mounting pieces are embedded in steps of the stair main body; the device has the advantages of simplicity and convenience in construction, simple structure and high construction efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of prefabricated buildings, and in particular relates to a prefabricated staircase structure. Background Art

[0002] Prefabricated buildings refer to buildings that transfer a large amount of on-site work in traditional construction methods to factories, where building components and accessories (such as floor slabs, wall panels, stairs, balconies) are processed and manufactured in the factory, transported to the construction site, and assembled and installed on site through reliable connection methods.

[0003] Prefabricated buildings mainly include prefabricated concrete structures, steel structures, and modern wooden structures. They are representatives of modern industrialized production methods because they adopt standardized design, factory production, assembly construction, information management, and intelligent applications.

[0004] In the prior art, steel bars are usually arranged at both ends of the prefabricated staircase to cooperate with the steel bars of the on-site building for pouring, thereby achieving the connection between the prefabricated staircase and the building.

[0005] The problem with the existing technology is that the fixing method of setting steel bars at both ends of the prefabricated stairs for casting has a long fixing period and inconvenient fixing operation; the steel bar structure of the prefabricated stairs usually includes two layers of steel mesh to ensure the structural strength of the stairs, and the structure is relatively complex; the handrail construction is separately punched after the stairs are assembled, the construction efficiency is low, and the original concrete structure layer needs to be destroyed. Summary of the invention

[0006] The utility model aims to provide a prefabricated staircase structure with the advantages of easy construction, simple structure and high construction efficiency in view of the problems existing in the prior art.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a prefabricated staircase structure, including a steel frame and a concrete layer arranged on the steel frame, the steel frame includes a plurality of bottom plate longitudinal bars arranged in parallel, the bottom plate longitudinal bars include inclined bars and horizontal bars arranged at the upper and lower ends of the inclined bars, a plurality of bottom plate transverse bars are arranged along the length direction on the bottom plate longitudinal bars, reinforcing bars are arranged directly above the two ends of the bottom plate longitudinal bars, the reinforcing bars include horizontal reinforcing bars and oblique reinforcing bars, the concrete layer includes a staircase body and horizontal mounting parts located at both ends of the staircase body, a mounting sleeve is embedded through the horizontal mounting part, a countersunk hole is opened in the mounting sleeve, and a guardrail mounting piece is embedded on the steps of the staircase body.

[0008] In the above scheme, the stair structure is stabilized by cooperating with the concrete layer through the steel frame. The bottom plate longitudinal reinforcement and the bottom plate transverse reinforcement of the steel frame are staggered to ensure the force stability of the bottom plate part of the stairs. Reinforcement ribs are arranged directly above the two ends of the bottom plate longitudinal reinforcement to ensure the connection stability of the installation sleeves at both ends of the stairs during lifting and installation. The horizontal reinforcement ribs are located directly above the horizontal reinforcement body, and the oblique reinforcement ribs are located directly above the inclined reinforcement body. The main body of the stairs in the concrete layer includes steps for passage. Guardrail mounting parts are embedded in the steps to facilitate the installation of guardrails and improve construction efficiency. An installation sleeve is embedded in the horizontal installation part to cooperate with the screw on the building for positioning, and the installation sleeve is fixed to the screw by threaded fasteners.

[0009] Furthermore, reinforcing embedded parts are arranged at the bottom of the left and right sides of the horizontal installation part, and the reinforcing embedded parts include angle steels, and the angle steels are connected with anchor pieces.

[0010] By setting reinforcing embedded parts at the bottom of the horizontal installation part, the structural stability of the connection between the horizontal installation part and the building is ensured, and it is convenient to use a crowbar tool to adjust the position of the stairs later to avoid damaging the concrete layer. The connection between the angle steel and the concrete layer is stabilized by the anchor.

[0011] Furthermore, a key groove is provided at the bottom of the end surface of the horizontal mounting portion, and the key groove is symmetrically arranged.

[0012] By opening a keyway at the bottom of the end surface of the horizontal installation part, the tightness of the connection with the poured concrete is improved to ensure the positioning effect, and the keyway is symmetrical on the left and right and the force is evenly applied.

[0013] Furthermore, the guardrail mounting parts include embedded bolts or embedded nuts, and the guardrail mounting parts are symmetrically arranged on both sides of the step.

[0014] By arranging embedded bolts or embedded nuts on the steps of the stair main body, the assembly of the guardrail is facilitated, and there is no need to perform drilling construction work after assembly. The structure is simple and the construction efficiency is high.

[0015] Furthermore, the guardrail mounting member includes a mounting base plate, and two embedded bolts are provided on the top surface of the mounting base plate.

[0016] The two embedded bolts are connected by installing the bottom plate to ensure the relative positions of the embedded bolts, which is convenient for manufacturing.

[0017] Furthermore, a railing is connected to the guardrail mounting piece via a threaded fastener, and a handrail is provided on the top of the railing.

[0018] The railing and handrail are connected by threaded fasteners, which has a simple structure and quick assembly.

[0019] Furthermore, the installation sleeves are symmetrically arranged on the left and right sides of the horizontal installation portion, and the installation sleeves are connected to the steel frame.

[0020] Installation sleeves are arranged on both sides of the horizontal installation part to facilitate hoisting operation and installation connection. The installation sleeves are connected to the steel frame to ensure stable connection with the steel frame and concrete layer.

[0021] Furthermore, connecting ribs are provided between the horizontal ribs and the horizontal reinforcing ribs, and between the inclined ribs and the oblique reinforcing ribs.

[0022] The connection stability between the horizontal ribs and the horizontal reinforcing ribs, and between the inclined ribs and the oblique reinforcing ribs is ensured by setting connecting ribs.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] 1. By setting installation sleeves at both ends of the concrete layer, the hoisting operation and installation positioning of the prefabricated staircase structure are facilitated. The installation sleeves are matched with the screws and nuts on the building to achieve assembled fastening, with high positioning accuracy and convenient construction. After the thread is fastened, the connection between the staircase and the building is strengthened by pouring concrete. By opening a keyway on the horizontal installation part, the connection anchoring effect between the prefabricated staircase and the poured concrete is strengthened to ensure the stability of the connection.

[0025] 2. By setting reinforcing ribs at the top of both ends of the bottom plate longitudinal ribs and bottom plate transverse ribs, the connection strength between the installation sleeve and the stair main body is ensured, with a simple structure and stable force;

[0026] 3. By setting guardrail mounting parts on the steps, it is convenient to install the guardrail, without the need for on-site drilling, with a simple structure and high construction efficiency;

[0027] 4. Reinforced embedded parts are set on both sides of the horizontal installation part to facilitate the use of pry tools on site to adjust the position of the stairs, reduce damage to the concrete layer, and improve the structural stability of the horizontal installation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a structural stereogram of a prefabricated staircase structure according to Example 1 of the utility model;

[0029] Figure 2 A bottom view of a prefabricated staircase structure according to Embodiment 1 of the present utility model;

[0030] Figure 3 This is a schematic diagram of the structure of the installation sleeve in Example 1 of the utility model;

[0031] Figure 4 This is a schematic diagram of the structure of the reinforced embedded part in Example 1 of the utility model;

[0032] Figure 5 It is a structural stereogram of the steel bar skeleton in Example 1 of the utility model;

[0033] Figure 6 This is a schematic diagram of the installation of the railing in Example 2 of the utility model;

[0034] In the figure: 1. Stair body; 2. Horizontal installation part; 3. Inclined ribs; 4. Horizontal ribs; 5. Bottom plate transverse ribs; 6. Horizontal reinforcing ribs; 7. Oblique reinforcing ribs; 8. Installation sleeve; 9. Countersunk hole; 10. Angle steel; 11. Anchor; 12. Keyway; 13. Embedded bolts; 14. Installation base plate; 15. Threaded fasteners; 16. Railings; 17. Handrails; 18. Connecting ribs; 19. Reinforced transverse ribs. DETAILED DESCRIPTION

[0035] The technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative labor are within the scope of protection of the utility model. In the description of the utility model, it should be noted that the terms front, back, left, right, etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships in which the utility model product is usually placed when used. They are only for the convenience of describing the utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0036] Example 1

[0037] like Figure 1-5 As shown, a prefabricated staircase structure includes a steel frame and a concrete layer arranged on the steel frame, the steel frame includes a plurality of bottom plate longitudinal bars arranged in parallel, the bottom plate longitudinal bars include an inclined bar body 3 and a horizontal bar body 4 arranged at the upper and lower ends of the inclined bar body 3, a plurality of bottom plate transverse bars 5 are arranged on the bottom plate longitudinal bars along the length direction, reinforcing bar bodies are arranged directly above the two ends of the bottom plate longitudinal bars, the reinforcing bar bodies include horizontal reinforcing bar 6 and oblique reinforcing bar 7, the concrete layer includes a staircase body 1 and horizontal mounting parts 2 located at both ends of the staircase body 1, a mounting sleeve 8 is embedded through the horizontal mounting part 2, a countersunk platform hole 9 is opened in the mounting sleeve 8, and a guardrail mounting piece is embedded on the steps of the staircase body 1.

[0038] In the above scheme, the stair structure is stabilized by cooperating with the concrete layer through the steel frame. The bottom plate longitudinal reinforcement and the bottom plate transverse reinforcement 5 of the steel frame are staggered to ensure the force stability of the bottom plate part of the stairs. Reinforcement ribs are arranged directly above the two ends of the bottom plate longitudinal reinforcement to ensure the connection stability of the installation sleeves 8 at both ends of the stairs during lifting and installation. The horizontal reinforcement ribs 6 are located directly above the horizontal reinforcement body 4, and the oblique reinforcement ribs 7 are located directly above the inclined reinforcement body 3. The stair body 1 of the concrete layer includes steps for passage. Guardrail mounting parts are buried on the steps to facilitate the installation of guardrails and improve construction efficiency. The installation sleeve 8 is buried on the horizontal installation part 2 to cooperate with the screw on the building for positioning, and the installation sleeve 8 is fixed to the screw by the threaded fastener 15.

[0039] In some embodiments, the bottom plate transverse ribs 5 are arranged equidistantly along the length direction of the bottom plate longitudinal ribs. A reinforcing transverse rib 19 is arranged on the reinforcing rib body.

[0040] Furthermore, reinforcing embedded parts are provided at the bottom of the left and right sides of the horizontal installation part 2 , and the reinforcing embedded parts include angle steels 10 , and the angle steels 10 are connected with anchors 11 .

[0041] By setting reinforcing embedded parts at the bottom of the horizontal mounting part 2, the structural stability of the connection between the horizontal mounting part 2 and the building is ensured, and it is convenient to use a crowbar tool to adjust the position of the stairs later to avoid damaging the concrete layer. The connection between the angle steel 10 and the concrete layer is stabilized by the anchor 11.

[0042] The length of the connection portion between the angle steel 10 and the horizontal mounting portion 2 corresponds to each other, and the anchor 11 may include a shear nail or an anchor rod body welded on the angle steel 10 .

[0043] Furthermore, a key groove 12 is provided at the bottom of the end surface of the horizontal mounting portion 2, and the key groove 12 is symmetrically arranged.

[0044] By providing a keyway 12 at the bottom of the end surface of the horizontal mounting portion 2, the tightness of the connection with the poured concrete is improved to ensure the positioning effect, and the keyway 12 is symmetrical and evenly stressed.

[0045] Two key slots 12 are symmetrically arranged at the end surface of the horizontal mounting portion 2 , and the cross section of the key slots 12 is rectangular.

[0046] Furthermore, the guardrail mounting parts include embedded bolts 13 or embedded nuts, and the guardrail mounting parts are symmetrically arranged on both sides of the step.

[0047] By arranging embedded bolts 13 or embedded nuts on the steps of the stair main body 1, the assembly of the guardrail is facilitated, and there is no need to perform drilling operations after assembly. The structure is simple and the construction efficiency is high.

[0048] The guardrail mounting piece can also be arranged on a single side of the step as required.

[0049] Furthermore, the guardrail mounting member includes a mounting base plate 14 , and two embedded bolts 13 are provided on the top surface of the mounting base plate 14 .

[0050] The two embedded bolts 13 are connected by installing the bottom plate 14 to ensure the relative positions of the embedded bolts 13, which facilitates manufacturing.

[0051] The installation base plate 14 is buried in the concrete layer. Shear nails or anchor rods may be provided at the bottom of the installation base plate 14 to increase the contact area with the concrete layer and ensure stable connection.

[0052] Furthermore, the installation sleeves 8 are symmetrically arranged on the left and right sides of the horizontal installation portion 2, and the installation sleeves 8 are connected to the steel frame.

[0053] Installation sleeves 8 are provided on both sides of the horizontal installation portion 2 to facilitate hoisting operations and installation connections. The installation sleeves 8 are connected to the steel frame to ensure stable connection with the steel frame and the concrete layer.

[0054] The mounting sleeve 8 is welded to the steel bar skeleton.

[0055] Furthermore, connecting ribs 18 are provided between the horizontal ribs 4 and the horizontal reinforcing ribs 6 , and between the inclined ribs 3 and the oblique reinforcing ribs 7 .

[0056] The connection stability between the horizontal rib body 4 and the horizontal reinforcing rib 6 and between the inclined rib body 3 and the oblique reinforcing rib 7 is ensured by providing the connecting rib 18 .

[0057] Example 2

[0058] like Figure 6 As shown, a prefabricated staircase structure in this embodiment is further modified as follows based on Embodiment 1:

[0059] Furthermore, a handrail 16 is connected to the guardrail mounting piece via a threaded fastener 15 , and a handrail portion 17 is provided on the top of the handrail 16 .

[0060] The railing 16 and the handrail are connected by a threaded fastener 15, which has a simple structure and is quick to assemble.

[0061] The guardrail mounting piece includes a pre-embedded screw, a connecting plate is provided at the bottom of the handrail 16, a connecting hole corresponding to the pre-embedded screw is opened on the connecting plate, and the threaded fastener 15 includes a nut.

[0062] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A prefabricated staircase structure, characterized in that: It includes a steel frame and a concrete layer arranged on the steel frame, the steel frame includes a plurality of bottom plate longitudinal bars arranged in parallel, the bottom plate longitudinal bars include inclined bars and horizontal bars arranged at the upper and lower ends of the inclined bars, a plurality of bottom plate transverse bars are arranged on the bottom plate longitudinal bars along the length direction, reinforcing bars are arranged directly above the two ends of the bottom plate longitudinal bars, the reinforcing bars include horizontal reinforcing bars and oblique reinforcing bars, the concrete layer includes a staircase body and horizontal mounting parts located at both ends of the staircase body, a mounting sleeve is embedded through the horizontal mounting part, a countersunk hole is opened in the mounting sleeve, and a guardrail mounting piece is embedded on the steps of the staircase body.

2. The prefabricated staircase structure according to claim 1, characterized in that: Reinforcement embedded parts are arranged at the bottom of the left and right sides of the horizontal installation part. The reinforcement embedded parts include angle steels, and the angle steels are connected with anchor pieces.

3. The prefabricated staircase structure according to claim 1, characterized in that: A key slot is provided at the bottom of the end surface of the horizontal mounting portion, and the key slot is symmetrically arranged.

4. The prefabricated staircase structure according to claim 1, characterized in that: The guardrail mounting parts include embedded bolts or embedded nuts, and the guardrail mounting parts are symmetrically arranged on both sides of the step.

5. The prefabricated staircase structure according to claim 4, characterized in that: The guardrail mounting piece comprises a mounting base plate, and two embedded bolts are arranged on the top surface of the mounting base plate.

6. The prefabricated staircase structure according to claim 1, characterized in that: The guardrail mounting piece is connected with a railing via a threaded fastener, and a handrail portion is arranged on the top of the railing.

7. The prefabricated staircase structure according to claim 1, characterized in that: The installation sleeves are symmetrically arranged on the left and right sides of the horizontal installation part, and the installation sleeves are connected to the steel frame.

8. The prefabricated staircase structure according to claim 1, characterized in that: Connecting ribs are arranged between the horizontal ribs and the horizontal reinforcing ribs, and between the inclined ribs and the oblique reinforcing ribs.

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