A concrete precast stair

Abstract

This utility model discloses a precast concrete staircase, relating to the field of precast concrete staircase technology. It includes a precast staircase body, with a step on one side and reinforcing steel bars in the middle. One end of the precast staircase body has a connector plate, and the other end has a connector groove. A connecting component is located on the side of the precast staircase body away from the step. The connecting component includes a connecting rod, with a connecting plate on the outside of one end of the connecting rod, and a positioning threaded rod in the middle of the connecting plate. This utility model achieves positioning and connection of the precast staircase body through the connector groove and connector plate. During installation, the connector plate is inserted into the pre-selected groove, thereby achieving positioning and connection between the precast staircase body and the building structure. The connector groove facilitates concrete pouring, improving connection stability, and the multiple reinforcing steel bars enhance the strength of the precast staircase body.

Description

Technical Field

[0001] This utility model relates to the field of precast concrete staircase technology, and in particular to a precast concrete staircase. Background Technology

[0002] The normal construction process for staircases nowadays typically involves setting up formwork on-site, tying reinforcing bars, pouring concrete, and continuously watering and curing it for 14 days to allow the concrete to reach the required strength. Then, the surface of the staircase is manually roughened, and tiles are pasted and railings are installed. The entire process is labor-intensive and generates significant amounts of wastewater, dust, and noise. Moreover, since the staircase is integrated with the building, it has poor earthquake resistance. During an earthquake, the vibrations generated by the upper and lower floor slabs will directly affect the staircase, causing it to break, collapse, or be damaged.

[0003] In recent years, the concept of precast stairs has been proposed: stairs are prefabricated in the factory using slabs and molds, and then directly installed on the construction site. There is no need to set up formwork or water curing, saving water resources and curing time, and greatly shortening the construction period. However, precast stairs are not convenient to install. Workers need to fix the stairs in the required position with steel bars, which affects work efficiency. At the same time, when the length of the stairs is not enough, the splicing effect of the stairs is not ideal. Therefore, there is a need to provide a precast concrete stairs to solve the above problems. Utility Model Content

[0004] The main purpose of this utility model is to provide a precast concrete staircase that can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A precast concrete staircase includes a precast staircase body, a step on one side of the precast staircase body, and a reinforcing steel bar in the middle of the precast staircase body. A splice plate is provided at one end of the precast staircase body, and a splice groove is provided at the other end of the precast staircase body. A connecting component is provided on the side of the precast staircase body away from the step.

[0007] The connecting assembly includes a connecting rod, a connecting plate is provided on the outside of one end of the connecting rod, and an auxiliary support rod is provided in the middle of one side of the connecting plate. A positioning threaded rod and a positioning nut are provided in the middle of the connecting plate, and a square block is provided at one end of the positioning threaded rod.

[0008] Preferably, one side of the prefabricated staircase body is provided with multiple steps, and a splice groove is provided in the middle of one end of the prefabricated staircase body. A reinforcing bar is fixedly connected inside the splice groove, and the reinforcing bar penetrates through the prefabricated staircase body. One end of the reinforcing bar extends into the splice groove, and there are multiple reinforcing bars, which are evenly distributed inside the prefabricated staircase body.

[0009] Preferably, the precast staircase body is fixedly connected to a plug plate at the end away from the plug slot, and a positioning connection groove is provided in the middle of the plug plate. There are multiple positioning connection grooves, which are evenly distributed in the middle of the plug plate and penetrate through the plug plate. The positioning connection grooves are correspondingly set with the reinforcing steel bars.

[0010] Preferably, the prefabricated staircase body has a groove on the side away from the steps, and there are two grooves, which are symmetrically distributed at both ends of the prefabricated staircase body. The opening of the groove penetrates one end of the prefabricated staircase body. A positioning groove is provided in the middle of the groove, and there are multiple positioning grooves, which are evenly distributed in the middle of the groove.

[0011] Preferably, a connecting rod is installed in the middle of the groove, and one end of the connecting rod contacts the inner wall of one side of the groove. A connecting plate is sleeved on the outer wall of the connecting rod, and both ends of the connecting plate contact the inner walls of both sides of the groove. An auxiliary support rod is slidably connected to the middle of one end of the connecting plate, and there are two auxiliary support rods, which are symmetrically distributed on both sides of the connecting plate. The connecting rod is located in the middle of the two auxiliary support rods.

[0012] Preferably, there are two connecting plates, symmetrically distributed at both ends of the connecting rod, and a positioning threaded rod is threadedly connected to the middle of the connecting plate. There are four positioning threaded rods, symmetrically distributed on both sides of the connecting plate, with each pair of positioning threaded rods staggered. One end of the positioning threaded rod passes through the connecting plate and is threadedly connected to the inside of the positioning groove. The end of the positioning threaded rod away from the positioning groove is threadedly connected to a square block, and a positioning nut is threadedly connected to the outer wall of the positioning threaded rod. The positioning nut is located on the side of the connecting plate away from the groove.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The precast staircase body is positioned and connected by the set plug slot and plug plate. During installation, the plug plate is inserted into the pre-selected slot, thereby achieving the positioning and connection between the precast staircase body and the building. The set plug slot facilitates the pouring of concrete and improves the stability of the connection. In addition, the set multiple reinforcing bars enhance the strength of the precast staircase body.

[0015] 2. Two connecting plates are connected to the two prefabricated stair bodies on the side away from the steps by positioning threaded rods. Rotating the positioning threaded rods fixes the two connecting plates, thereby splicing the two prefabricated stair bodies. The connecting rods and two auxiliary support rods strengthen the connection between the two connecting plates and improve the stability of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall unfolded structure of the device of this utility model;

[0018] Figure 3 This is a structural schematic diagram of the prefabricated staircase body of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the connecting component of this utility model.

[0020] In the diagram: 1. Precast staircase body; 2. Steps; 3. Insertion groove; 4. Reinforcing steel bar; 5. Insertion plate; 6. Positioning connection groove; 7. Connecting component; 8. Groove; 9. Connecting rod; 10. Auxiliary support rod; 11. Connecting plate; 12. Positioning threaded rod; 13. Positioning nut; 14. Square block; 15. Positioning groove. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] Please see Figure 1 , Figure 2 , Figure 3 As shown, a precast concrete staircase includes a precast staircase body 1. A step 2 is provided on one side of the precast staircase body 1, and a reinforcing steel bar 4 is provided in the middle of the precast staircase body 1. A splice plate 5 is provided at one end of the precast staircase body 1, and a splice groove 3 is provided at the other end of the precast staircase body 1. A connecting component 7 is provided on the side of the precast staircase body 1 away from the step 2. Multiple steps 2 are provided on one side of the precast staircase body 1, and a splice groove 3 is provided in the middle of one end of the precast staircase body 1. A reinforcing steel bar 4 is fixedly connected inside the splice groove 3, and the reinforcing steel bar 4 penetrates through the precast staircase body 1. One end of the reinforcing steel bar 4 extends into the interior of the splice groove 3, and there are multiple reinforcing steel bars 4, evenly distributed throughout the precast staircase. Inside the main body 1, a plug plate 5 is fixedly connected to the end of the precast staircase main body 1 away from the plug groove 3, and a positioning connection groove 6 is opened in the middle of the plug plate 5. There are multiple positioning connection grooves 6, which are evenly distributed in the middle of the plug plate 5 and penetrate through the plug plate 5. The positioning connection grooves 6 are correspondingly set with the reinforcing steel bars 4. The positioning connection of the precast staircase main body 1 is achieved through the plug groove 3 and the plug plate 5. During installation, the plug plate 5 is inserted into the pre-selected groove, thereby achieving the positioning connection between the precast staircase main body 1 and the building. The plug groove 3 facilitates the pouring of concrete and improves the stability of the connection. The multiple reinforcing steel bars 4 enhance the strength of the precast staircase main body 1.

[0023] Please see Figure 1 , Figure 2 , Figure 4 As shown, the connecting component 7 includes a connecting rod 9, with a connecting plate 11 on the outside of one end of the connecting rod 9. An auxiliary support rod 10 is located in the middle of one side of the connecting plate 11. A positioning threaded rod 12 and a positioning nut 13 are located in the middle of the connecting plate 11. A square block 14 is located at one end of the positioning threaded rod 12. A groove 8 is provided on the side of the precast stair body 1 away from the step 2. There are two grooves 8, symmetrically distributed at both ends of the precast stair body 1. The opening of the groove 8 penetrates one end of the precast stair body 1. A square block 14 is located in the middle of the groove 8. A positioning groove 15 is provided, and there are multiple positioning grooves 15, which are evenly arranged in the middle of the groove 8. A connecting rod 9 is installed in the middle of the groove 8, and one end of the connecting rod 9 is in contact with one side inner wall of the groove 8. A connecting plate 11 is sleeved on the outer wall of the connecting rod 9, and both ends of the connecting plate 11 are in contact with the two sides inner walls of the groove 8. An auxiliary support rod 10 is slidably connected to one end of the connecting plate 11, and there are two auxiliary support rods 10, which are symmetrically distributed on both sides of the connecting plate 11. The connecting rod 9 is located in the middle of the two auxiliary support rods 10.

[0024] There are two connecting plates 11, symmetrically distributed at both ends of the connecting rod 9. A positioning threaded rod 12 is threadedly connected to the middle of the connecting plate 11. There are four positioning threaded rods 12, symmetrically distributed on both sides of the connecting plate 11, with each pair of positioning threaded rods 12 staggered. One end of the positioning threaded rod 12 passes through the connecting plate 11 and is threadedly connected to the interior of the positioning groove 15. The end of the positioning threaded rod 12 away from the positioning groove 15 is threadedly connected to a square block 14. A positioning nut 13 is threadedly connected to the outer wall of the positioning threaded rod 12, located on the side of the connecting plate 11 away from the groove 8. The two connecting plates 11 are connected to the two prefabricated stair bodies 1 on the side away from the step 2 via the positioning threaded rods 12. Rotating the positioning threaded rods 12 fixes the two connecting plates 11, thus achieving the splicing of the two prefabricated stair bodies 1. The connecting rod 9 and two auxiliary support rods 10 strengthen the connection between the two connecting plates 11, improving the stability of the device.

[0025] It should be noted that this utility model is a precast concrete staircase. In use, the insertion groove 3 at one end of the first precast staircase body 1 is aligned with the insertion plate 5 at one end of the second precast staircase body 1. The insertion plate 5 is then inserted into the insertion groove 3. Simultaneously, the reinforcing steel bar 4 extending from the middle of the insertion groove 3 is inserted into the positioning connection groove 6 in the middle of the insertion plate 5, thereby achieving a positioning connection between the two precast staircase bodies 1 and improving the strength of the connection. The connecting rod 9 and two auxiliary support rods 10 are then engaged in the two grooves 8 at the connection point of the two precast staircase bodies 1. The position of the connecting plate 11 is adjusted so that the two connecting plates 11 are aligned with the two grooves 8 respectively. The positioning thread is then rotated. The positioning threaded rod 12 is driven into the pre-reserved positioning groove 15, thereby achieving simple positioning of the prefabricated stair body 1 and the connecting plate 11. Then, the positioning nut 13 is rotated to achieve a tight connection between the connecting plate 11 and the positioning threaded rod 12, improving the stability of use. A square block 14 is fixedly connected to one end of the positioning threaded rod 12, which facilitates the operation of the positioning threaded rod 12 and improves the ease of use of the device. The two prefabricated stair bodies 1 are combined to form a new prefabricated stair body 1. The plug plate 5 at one end of the new prefabricated stair body 1 is snapped into the inside of the building. The plug groove 3 is penetrated by concrete, thereby achieving the positioning connection of the assembled building.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A precast concrete staircase, comprising a precast staircase body (1), characterized in that: The prefabricated stair body (1) has a step (2) on one side, and a reinforcing steel bar (4) is provided in the middle of the prefabricated stair body (1). One end of the prefabricated stair body (1) is provided with a plug plate (5), and the other end of the prefabricated stair body (1) is provided with a plug groove (3). A connecting component (7) is provided on the side of the prefabricated stair body (1) away from the step (2). The connecting assembly (7) includes a connecting rod (9), one end of which is provided with a connecting plate (11), and an auxiliary support rod (10) is provided in the middle of one side of the connecting plate (11). A positioning threaded rod (12) and a positioning nut (13) are provided in the middle of the connecting plate (11), and a square block (14) is provided at one end of the positioning threaded rod (12).

2. A precast concrete staircase according to claim 1, characterized in that: The prefabricated staircase body (1) has multiple steps (2) on one side, and a slot (3) is provided in the middle of one end of the prefabricated staircase body (1). A reinforcing steel bar (4) is fixedly connected inside the slot (3), and the reinforcing steel bar (4) penetrates the prefabricated staircase body (1). One end of the reinforcing steel bar (4) extends into the slot (3), and there are multiple reinforcing steel bars (4) that are evenly distributed inside the prefabricated staircase body (1).

3. A precast concrete staircase according to claim 2, characterized in that: The prefabricated staircase body (1) is fixedly connected to a plug plate (5) at one end away from the plug groove (3), and a positioning connection groove (6) is provided in the middle of the plug plate (5). There are multiple positioning connection grooves (6), which are evenly distributed in the middle of the plug plate (5), and the positioning connection grooves (6) penetrate the plug plate (5). The positioning connection grooves (6) are correspondingly set with the reinforcing steel bars (4).

4. A precast concrete staircase according to claim 1, characterized in that: The prefabricated staircase body (1) has a groove (8) on the side away from the step (2), and there are two grooves (8), which are symmetrically distributed at both ends of the prefabricated staircase body (1). The opening of the groove (8) penetrates one end of the prefabricated staircase body (1). A positioning groove (15) is provided in the middle of the groove (8), and there are multiple positioning grooves (15), which are evenly distributed in the middle of the groove (8).

5. A precast concrete staircase according to claim 4, characterized in that: A connecting rod (9) is installed in the middle of the groove (8), and one end of the connecting rod (9) is in contact with the inner wall of one side of the groove (8). A connecting plate (11) is sleeved on the outer wall of the connecting rod (9), and both ends of the connecting plate (11) are in contact with the inner walls of both sides of the groove (8). An auxiliary support rod (10) is slidably connected to one end of the connecting plate (11), and there are two auxiliary support rods (10), which are symmetrically distributed on both sides of the connecting plate (11). The connecting rod (9) is located in the middle of the two auxiliary support rods (10).

6. A precast concrete staircase according to claim 5, characterized in that: There are two connecting plates (11), which are symmetrically distributed at both ends of the connecting rod (9). A positioning threaded rod (12) is threadedly connected to the middle of the connecting plate (11). There are four positioning threaded rods (12), which are symmetrically distributed on both sides of the connecting plate (11). Each pair of positioning threaded rods (12) are staggered. One end of the positioning threaded rod (12) passes through the connecting plate (11) and is threadedly connected to the inside of the positioning groove (15). The end of the positioning threaded rod (12) away from the positioning groove (15) is threadedly connected to a square block (14). A positioning nut (13) is threadedly connected to the outer wall of the positioning threaded rod (12). The positioning nut (13) is located on the side of the connecting plate (11) away from the groove (8).

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