Plate-type prefabricated stair for building

Abstract

The utility model discloses a plate-type prefabricated stair for building, a steel structure is embedded in a stair plate and a support, the steel structure comprises a frame embedded in the support and a load-bearing steel bar embedded in the stair plate, the frame comprises two frames which are parallel to each other and coincide in projection, a plurality of groove bodies are evenly formed in the outer side of each frame, and the groove bodies are embedded in the support. Each load-bearing steel bar comprises an inclined section embedded in the corresponding ladder plate and a horizontal section embedded in the corresponding support, and the horizontal sections are installed in the groove bodies in a limited mode. The stressed steel bars and the frame are provided with limiting points, each stressed steel bar is provided with a horizontal section and an inclined section, the transition position is bent in an arc shape, the limiting points are groove bodies formed in the frame, when the stressed steel bars are installed, through limiting of the groove bodies, the stressed steel bars are evenly distributed, reasonably combined and evenly stressed, and the problem that the steel bars are disordered and not standard due to manual arrangement is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering construction, in particular to a plate-type prefabricated staircase for construction. Background Art

[0002] Precast concrete staircases are easy to design. Traditional staircases require architects to carefully plan to exact proportions. If changes require moving or modifying the staircase, the architect must repeat the time-consuming design process. Precast staircases are designed using a simple computer program, allowing designers to adjust dimensions, create gaps, or create gaps based on real-world conditions, making adjustments instantly possible. Precast staircases offer high reliability, are constructed regardless of weather conditions, are simple to assemble, and significantly shorten construction times.

[0003] Compared to prefabricated floor slabs, prefabricated stairs are more difficult to manufacture because they have more corners and require more complex molds. When casting the mold, if the steel reinforcement is not properly sized, the steel structure needs to be reworked, which is time-consuming and labor-intensive. Furthermore, the uneven distribution of reinforcement can lead to quality issues later on. Therefore, this utility model is primarily targeted at prefabricated concrete stairs, as prefabricated steel structures are prone to irregular reinforcement and fixation, making casting difficult and potentially causing quality issues later on. Utility Model Content

[0004] The purpose of the utility model is to provide a plate-type prefabricated staircase for construction, mainly for prefabricated concrete stairs. When prefabricating steel structures, it is easy for the reinforcement to be irregularly fixed, resulting in difficulty in pouring and quality problems in the later stage.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] A plate-type prefabricated staircase for construction, comprising stair treads and steps on the upper sides of the stair treads, which are cast in one piece. The ends of the stair treads are provided with integral supports, and the stair treads and the supports are embedded with steel structures.

[0007] The steel structure includes a frame embedded in the support and stress-bearing steel bars embedded in the ladder plate;

[0008] The frame includes two parallel and overlapping frames, the frames are square, the corners between the two frames are connected and fixed by angle steel, and multiple grooves are evenly opened on the outer sides of the frames, and the grooves opened between the two frames correspond to each other one by one;

[0009] The stressed steel bars include an inclined section embedded in the ladder plate and a horizontal section embedded in the support, and the horizontal section is limitedly installed in the trough body.

[0010] Furthermore, the frame has a clamping strip on the side, the clamping strip has a clamping slot that is clamped into the side of the frame, and the clamping strip has a notch at a position corresponding to the slot body.

[0011] Furthermore, the inner side of the frame is provided with an inner frame, the inner side of the frame is fixed to the inner frame, and the inner frames corresponding to the frames on both sides are fixed by installing angle steels at their corners.

[0012] Furthermore, the support is provided with a hole reserved for a pin, and a pipe sleeve is installed at a position of the frame corresponding to the hole reserved for the pin, and the pipe mouth of the pipe sleeve is located between the inner frames and fixed by a fixing plate.

[0013] Furthermore, the upper and lower stressed steel bars corresponding to the ladder plate are fixed with reinforcing bars, the reinforcing bars are perpendicular to the stressed steel bars, and the intersection points of the reinforcing bars and the stressed steel bars are fixed.

[0014] The utility model has the following beneficial effects: a steel structure is embedded inside the support and the ladder plate, wherein the frame is used for the stability and structural support of the support, the stressed steel bars are used for the ladder plate, the stressed steel bars and the frame have limit points, the stressed steel bars have horizontal sections and inclined sections, and are arc-shaped at the transition point. The limit points are grooves opened on the frame. When installing the stressed steel bars, the grooves are used to limit the position, so that the stressed steel bars are evenly distributed, reasonably combined, and evenly stressed, thereby avoiding the problems of disorder and non-standardization of steel bars caused by artificial arrangement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] Figure 1 : Schematic diagram of the structure of the utility model.

[0017] Figure 2 : A structural diagram of a steel structure of the present invention.

[0018] Figure 3 : Schematic diagram of the framework structure of the present invention.

[0019] Figure 4 : The utility model Figure 1 Schematic diagram of the structure with cutaway sections.

[0020] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0021] Ladder 1, steps 11, supports 12, frame 2, stressed steel bars 3, frame 21, trough 22, clip 4, notch 41, inner frame 23, pin reserved hole 13, pipe sleeve 24, fixing plate 25, reinforcing rib 31. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. The embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] like Figure 1-4 As shown: A plate-type prefabricated staircase for construction, including a stair tread 1 cast in one piece and a step 11 on the upper side of the stair tread. The end sides of the stair tread 1 are provided with an integral support 12, and a steel structure is embedded in the stair tread 1 and the support. The support is a horizontal concrete slab used to support the platform beam, and the platform beam is provided with a lug to support the support. The thickness of the stair tread is determined according to actual conditions and is generally 120-150mm. The steel structure includes a frame 2 embedded in the support 12, including stress-bearing steel bars 3 embedded in the stair tread 1; the frame is a cubic steel structure, and the side frames of the frame are used to support the sides to improve stability.

[0024] The frame 2 includes two parallel frames 21 with overlapping projections. The frames are square. The corners between the two frames 21 are connected and fixed by angle steel. A plurality of grooves 22 are evenly opened on the outer side of the frame 21. The grooves 22 opened between the two frames 21 correspond to each other one by one. The frame has a weight-reducing inner hole, and the groove is an open groove with the notch facing outward.

[0025] The stressed steel bar 3 includes an inclined section embedded in the ladder plate 1 and a horizontal section embedded in the support 12 . The horizontal section of the stressed steel bar is position-limited and installed in the trough body 22 .

[0026] In the utility model, a steel structure is embedded inside the support and the ladder plate, wherein the frame is used for the stability and structural support of the support, the stressed steel bars are used for the ladder plate, the stressed steel bars and the frame have limit points, the stressed steel bars have horizontal sections and inclined sections, and are arc-shaped at the transition point. The limit points are grooves opened on the frame. When installing the stressed steel bars, the grooves are used to limit the position, so that the stressed steel bars are evenly distributed, reasonably combined, and evenly stressed, thereby avoiding the problems of disorder and non-standardization of steel bars caused by artificial arrangement.

[0027] like Figure 3 As shown: the frame 21 has a clip 4 on the side, the clip 4 has a slot that fits into the side of the frame 21, and the clip has a slot 41 at the position corresponding to the slot. After the horizontal section of the stressed steel bar is installed in the slot, the clip is further installed to stabilize the stressed steel bar.

[0028] like Figure 3 As shown: the inner side of the frame 21 has an inner frame 23, the inner side of the frame 21 is fixed to the inner frame 23, and the inner frames 23 corresponding to the frames 21 on both sides are fixed by installing angle steel at their corners.

[0029] like Figure 1 、 3 As shown, the support 12 is provided with a pin hole 13, and the frame 2 is installed with a pipe sleeve 24 at the position corresponding to the pin hole 13. The pipe opening of the pipe sleeve 24 is located between the inner frame 23 and fixed by a fixing plate 25. The pin hole is used to position and fix to the platform beam. The platform beam is vertically fixed with a limit rod at the position corresponding to the lug. Sliding material is also provided between the support and the support surface of the lug. The node is a flexible connection that can release structural deformation to improve seismic properties.

[0030] like Figure 2 As shown, the upper and lower stress-bearing steel bars 3 corresponding to the ladder tread are fixed with reinforcing ribs 31. The reinforcing ribs 31 are perpendicular to the stress-bearing steel bars 3 and fixed at the intersection with the stress-bearing steel bars 3. This is used to further strengthen the structural support performance. The upper and lower reinforcement bars are made of the same steel bar, with an arc-shaped bend in the middle to facilitate integrated installation. During installation, the upper and lower reinforcement bars are connected by a fork-like structure extending from one stress-bearing bar to the other.

[0031] This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can better understand and utilize the present invention.

Claims

1. A plate-type prefabricated staircase for construction, comprising a stair tread (1) and steps (11) on the upper side of the stair tread, wherein the end sides of the stair tread (1) are provided with integral supports (12), and a steel structure is embedded in the stair tread (1) and the supports; characterized in that: The steel structure includes a frame (2) embedded in the support (12), and a stress-bearing steel bar (3) embedded in the ladder plate (1); The frame (2) includes two parallel frames (21) whose projections overlap with each other. The corners between the two frames (21) are connected and fixed by angle steel. A plurality of grooves (22) are evenly formed on the outer sides of the frames (21). The grooves (22) formed between the two frames (21) correspond to each other one by one. The stressed steel bar (3) comprises an inclined section embedded in the ladder plate (1) and a horizontal section embedded in the support (12), and the horizontal section of the stressed steel bar is position-limited and installed in the trough body (22).

2. A plate-type prefabricated staircase for construction according to claim 1, characterized in that: The frame (21) has a clamping strip (4) on the side, the clamping strip (4) has a clamping slot that is clamped into the side of the frame (21), and the position of the clamping strip corresponding to the slot body has a notch (41).

3. The plate-type prefabricated staircase for construction according to claim 1, characterized in that: The inner side of the frame (21) has an inner frame (23), the inner side of the frame (21) is fixed to the inner frame (23), and the inner frames (23) corresponding to the frames (21) on both sides are fixed by installing angle steel at their corners.

4. The plate-type prefabricated staircase for construction according to claim 3, characterized in that: The support (12) is provided with a pin reserved hole (13), and the frame (2) is provided with a pipe sleeve (24) at a position corresponding to the pin reserved hole (13). The pipe opening of the pipe sleeve (24) is located between the inner frames (23) and is fixed by a fixing plate (25).

5. The plate-type prefabricated staircase for construction according to claim 1, characterized in that: The upper stressed steel bars (3) and the lower stressed steel bars corresponding to the ladder plate are both fixed with reinforcing bars (31), the reinforcing bars (31) are perpendicular to the stressed steel bars (3), and the intersection points of the reinforcing bars (31) and the stressed steel bars (3) are fixed.

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