Assembly type stair connecting device

Abstract

The utility model relates to the technical field of connecting devices, and discloses an assembly type stair connecting device which comprises connecting plates integrally prefabricated and formed at the two ends of an assembly stair body and cast-in-place carrying tables cast in place at the floor position and matched with the connecting plates, and at least two embedded connecting threaded columns are embedded in each cast-in-place carrying table. Each connecting plate is provided with a preformed hole with the inner diameter larger than the diameter of the embedded connecting threaded column, the upper portion of each preformed hole is provided with a clamping table, the side face of the lower portion of each embedded connecting threaded column is in threaded connection with an adjusting column, the lower portion of each adjusting column is fixedly provided with a round extrusion circular truncated cone with the narrow upper portion and the wide lower portion, and the lower portions of the preformed holes are matched with the extrusion circular truncated cones; and the upper part of the adjusting column is fixedly connected with a polygonal clamping part. According to the assembly stair body, the adjusting column is rotated upwards, the extrusion circular truncated cone extrudes the connecting plate when moving upwards, the position of the assembly stair body can be adjusted conveniently, and the installation efficiency of the assembly stair body is improved.

Description

Technical Field

[0001] This utility model relates to the field of connection device technology, specifically a prefabricated staircase connection device. Background Technology

[0002] With the rise of prefabricated buildings in my country's construction industry, the installation of prefabricated stairs has become an indispensable part of the construction process. Fully prefabricated stairs can be installed directly after being transported to the construction site, without the need for formwork or watering for curing, saving water resources and curing time, and greatly shortening the construction period.

[0003] A search revealed a patent, CN218861766U, which discloses a connection and reinforcement structure including a prefabricated staircase and a stair beam. The prefabricated staircase has limiting grooves on both ends, and the stair beam has limiting blocks cast into its inner ends. The prefabricated staircase is placed inside the stair beam, with the limiting blocks inserted into the limiting grooves. A fixing bolt is pre-embedded in the center of the top of the stair beam. This utility model solution connects the prefabricated staircase to the stair beam by inserting the limiting blocks into the limiting grooves and the fixing bolts into the mounting holes. Concrete is then poured into the mounting holes, and fixing nuts are installed on the exposed fixing bolts to complete the reinforcement. This device, utilizing the combination of limiting blocks and limiting grooves, greatly improves the stability of the connection, effectively preventing displacement of the prefabricated staircase. Therefore, only one set of fixing bolts is needed for fixation, improving installation convenience.

[0004] The aforementioned patents have significant beneficial effects, but in practical application, they still have the following shortcomings:

[0005] The aforementioned comparative documents describe the connection and installation of prefabricated stairs using pre-embedded fixing bolts. However, in reality, prefabricated stairs are typically installed via hoisting. Due to poor stability during hoisting and issues with the prefabrication process, the inner diameter of the mounting holes on the stairs is generally larger than the diameter of the pre-embedded fixing bolts. While this method facilitates aligning the mounting holes on the prefabricated stairs with the pre-embedded fixing bolts and inserting them, the position of the prefabricated stairs may require repeated adjustments because the inner diameter of the mounting holes is larger than the diameter of the pre-embedded fixing bolts. This often involves using a pry bar to adjust the position of the prefabricated stairs, reducing the efficiency of connecting and installing prefabricated stairs. Therefore, there is an urgent need in this field to improve the connection device for prefabricated stairs to overcome the shortcomings of the existing technology. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a prefabricated staircase connection device, which improves the installation efficiency of the prefabricated staircase body.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a prefabricated staircase connection device, comprising a prefabricated connecting plate at both ends of the prefabricated staircase body and a cast-in-place platform adapted to the connecting plate at the floor position. Each cast-in-place platform has at least two pre-embedded threaded connecting columns. Each connecting plate has a reserved hole with an inner diameter larger than the diameter of the pre-embedded threaded connecting column. A snap-fit ​​platform is provided above the reserved hole. An adjusting column is threadedly connected to the lower side of the pre-embedded threaded connecting column. A round extrusion frustum with a narrow top and wide bottom is fixedly installed at the lower part of the adjusting column. The lower part of the reserved hole is adapted to the extrusion frustum. A polygonal snap-fit ​​part is fixedly connected to the upper part of the adjusting column. A locking nut adapted to the snap-fit ​​platform is threadedly connected to the upper side of the pre-embedded threaded connecting column.

[0008] Preferably, each cast-in-place platform is pre-embedded with a pre-embedded positioning steel plate, and several pre-embedded threaded columns are connected to the pre-embedded positioning steel plate. Several hooked steel bars with hook-shaped ends are fixedly connected to the lower part of the pre-embedded positioning steel plate.

[0009] Preferably, the pre-embedded threaded post is fixedly installed on the upper part of the pre-embedded positioning steel plate by welding.

[0010] Preferably, the pre-embedded threaded column is connected to the upper part of the pre-embedded positioning steel plate by thread.

[0011] Preferably, a first grouting hole communicating with the lower part of the reserved hole is provided at the bottom of the snap-fit ​​platform, and a second grouting hole communicating with the middle part of the reserved hole is provided on the inner side wall of the first grouting hole.

[0012] Preferably, the side of the pre-embedded threaded column is fitted with a reinforcing rib, and the lower part of the extruded frustum is provided with a relief groove that matches the reinforcing rib.

[0013] Preferably, handrail connecting rods are pre-embedded in the upper part of both the assembled staircase body and the connecting plate, and the handrail connecting rods are used to install the handrails.

[0014] To address the shortcomings of existing technologies, this utility model provides a prefabricated staircase connection device, overcoming these deficiencies. The beneficial effects of this utility model are as follows:

[0015] 1. In this utility model, rotating the adjusting column upwards and pressing the connecting plate upwards when the extrusion platform moves up will cause the connecting plate to move until the reserved hole and the pre-embedded connecting threaded column are in the same axial position. This will complete the position calibration of the assembled stair body, making it easier to adjust the position of the assembled stair body and improve the installation efficiency of the assembled stair body.

[0016] 2. In this utility model, the upward movement of the adjusting column can also drive the connecting plate to move upward, thereby adjusting the horizontal position of the connecting plate and improving the applicability of the connecting device.

[0017] 3. In this utility model, the pre-embedded connecting threaded column is positioned by pre-embedded positioning steel plate and bent hook steel bar, which improves the accuracy of pre-embedded positioning of the pre-embedded connecting threaded column, and grouting is carried out through the first grouting hole and the second grouting hole to improve the stability of the assembled staircase body after installation.

[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures pointed out in the description, claims, and drawings. Attached Figure Description

[0019] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a cross-sectional structural diagram of the connecting plate in this utility model;

[0022] Figure 3 This is a schematic diagram of the pre-embedded positioning steel plate in this utility model;

[0023] Figure 4 This is a schematic diagram of the extrusion frustum structure in this utility model;

[0024] Figure 5 for Figure 2 Enlarged structural diagram at point A in the middle.

[0025] In the diagram: 1. Assembled staircase body; 2. Connecting plate; 3. Cast-in-place platform; 4. Embedded threaded column; 5. Reserved hole; 6. Clip-on platform; 7. Adjusting column; 8. Extrusion frustum; 9. Clip-on part; 10. Locking nut; 11. Embedded positioning steel plate; 12. Hooked steel bar; 13. First grouting hole; 14. Second grouting hole; 15. Reinforcing rib; 16. Leaving groove; 17. Handrail connecting rod. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1

[0028] Please see Figures 1-5 A prefabricated staircase connection device includes connecting plates 2 integrally prefabricated at both ends of the prefabricated staircase body 1 and cast-in-place platforms 3 adapted to the connecting plates 2 at the floor positions. Each cast-in-place platform 3 has at least two pre-embedded threaded connecting columns 4. Each connecting plate 2 has a reserved hole 5 with an inner diameter larger than the diameter of the pre-embedded threaded connecting column 4. A snap-fit ​​platform 6 is provided on the upper part of the reserved hole 5. An adjusting column 7 is threadedly connected to the lower side of the pre-embedded threaded connecting column 4. A compression frustum 8 with a narrow upper part and a wide lower part is fixedly installed on the lower part of the adjusting column 7. The lower part of the reserved hole 5 is adapted to the compression frustum 8. A polygonal snap-fit ​​part 9 is fixedly connected to the upper part of the adjusting column 7. A locking nut 10 adapted to the snap-fit ​​platform 6 is threadedly connected to the upper side of the pre-embedded threaded connecting column 4.

[0029] Specifically, the pre-embedded threaded column 4 is positioned and embedded in the cast-in-place platform 3. When the assembled staircase body 1 needs to be assembled and installed, firstly, the adjusting column 7 is threaded onto the side of the pre-embedded threaded column 4, and the adjusting column 7 is rotated to the lowest part of the pre-embedded threaded column 4. Then, the assembled staircase body 1 is hoisted to the upper part of the two cast-in-place platforms 3 using lifting equipment, and the position of the reserved hole 5 is aligned with the position of the pre-embedded threaded column 4. The two connecting plates 2 are placed on the upper part of the cast-in-place platform 3 respectively. Then, the position of the assembled staircase body 1 is adjusted, and it is fastened to the side of the fastening part 9 using a fastening tool. The adjusting column 7 is rotated upward, and the adjusting column 7 drives the extrusion platform 8 to move upward. After the extrusion platform 8 moves upward, The extrusion platform 8 contacts and presses against the lower part of the pre-drilled hole 5. Since the extrusion platform 8 and the lower part of the pre-drilled hole 5 are in a matching circular shape, when the extrusion platform 8 moves upward, it presses against the connecting plate 2, causing the connecting plate 2 to move until the pre-drilled hole 5 and the pre-embedded connecting threaded column 4 are in a coaxial position. This completes the position calibration of the assembled stair body 1, which facilitates the adjustment of the position of the assembled stair body 1 and improves the installation efficiency of the assembled stair body 1. At the same time, the upward movement of the adjusting column 7 can also drive the connecting plate 2 to move upward, which can adjust the horizontal position of the connecting plate 2. After the position of the assembled stair body 1 is adjusted, the locking nut 10 is threaded onto the side of the pre-embedded connecting threaded column 4 and the locking nut 10 is locked.

[0030] As a technical optimization of this utility model, each cast-in-place platform 3 is pre-embedded with a pre-embedded positioning steel plate 11, and several pre-embedded connecting threaded columns 4 are connected to the pre-embedded positioning steel plate 11. Several hooked steel bars 12 with hook-shaped ends are fixedly connected to the lower part of the pre-embedded positioning steel plate 11. Several pre-embedded connecting threaded columns 4 are all set on the pre-embedded positioning steel plate 11, and are welded to the reinforcement in the cast-in-place platform 3 through the hooked steel bars 12, thereby improving the accuracy of the pre-embedded position of the pre-embedded connecting threaded columns 4.

[0031] As a technical optimization of this utility model, the pre-embedded connecting threaded column 4 is fixedly installed on the upper part of the pre-embedded positioning steel plate 11 by welding. In the early stage, the pre-embedded connecting threaded column 4 is welded to the pre-embedded positioning steel plate 11 to improve the stability of the connection between the two.

[0032] As a technical optimization of this utility model, a first grouting hole 13 communicating with the lower part of the reserved hole 5 is opened at the bottom of the snap-fit ​​platform 6, and a second grouting hole 14 communicating with the middle part of the reserved hole 5 is opened on the inner side wall of the first grouting hole 13. After the position of the assembled stair body 1 is adjusted, grouting is performed in the first grouting hole 13 by a grouting machine. The first grouting hole 13 grouts the lower part of the reserved hole 5, and the second grouting hole 14 grouts the side of the adjusting column 7, thereby improving the stability of the assembled stair body 1 after installation.

[0033] As a technical optimization of this utility model, handrail connecting rods 17 are pre-embedded in the upper part of both the assembled staircase body 1 and the connecting plate 2. The handrail connecting rods 17 are used to install handrails. The handrail connecting rods 17 can be threaded connectors or welded connectors, which facilitates the later installation of handrails.

[0034] Example 2

[0035] Please see Figure 4 and Figure 5 This embodiment includes the above embodiment, and further includes: a pre-embedded threaded column 4 is threadedly connected to the upper part of the pre-embedded positioning steel plate 11, a reinforcing rib 15 is sleeved on the side of the pre-embedded threaded column 4, and a relief groove 16 adapted to the reinforcing rib 15 is opened at the lower part of the extrusion frustum 8.

[0036] Specifically, in this embodiment, the pre-embedded threaded column 4 is connected to the pre-embedded positioning steel plate 11 by a threaded connection. When pre-embedding the pre-embedded positioning steel plate 11, only the position of the pre-embedded positioning steel plate 11 needs to be positioned and pre-embedded, without the need to install the pre-embedded threaded column 4. The pre-embedded positioning steel plate 11 can be provided with several threaded holes that are compatible with the pre-embedded threaded column 4, which can be pre-embedded for stairs of different sizes. It also prevents damage to the threads on the side of the pre-embedded threaded column 4 during the pouring process. When pouring the cast-in-place platform 3, the upper part of the pre-embedded positioning steel plate 11 is protected by shielding objects, which improves the applicability of the overall device. After the pre-embedded threaded column 4 is threadedly connected to the upper part of the pre-embedded positioning steel plate 11, the reinforcing rib 15 is sleeved on the side of the pre-embedded threaded column 4. The reinforcing rib 15 is welded to the pre-embedded positioning steel plate 11 and the pre-embedded threaded column 4 respectively, which improves the stability of the pre-embedded threaded column 4. The clearance groove 16 makes way for the extrusion frustum 8.

[0037] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A prefabricated staircase connection device, comprising prefabricated connecting plates (2) at both ends of a prefabricated staircase body (1) and a cast-in-place platform (3) adapted to the connecting plates (2) at the floor level, characterized in that, Each cast-in-place platform (3) is pre-embedded with at least two pre-embedded threaded columns (4). Each connecting plate (2) is provided with a reserved hole (5) with an inner diameter larger than that of the pre-embedded threaded column (4). A snap-fit ​​platform (6) is provided on the upper part of the reserved hole (5). An adjusting column (7) is threadedly connected to the lower side of the pre-embedded threaded column (4). A round extrusion frustum (8) with a narrow upper part and a wide lower part is fixedly installed on the lower part of the adjusting column (7). The lower part of the reserved hole (5) is adapted to the extrusion frustum (8). A polygonal snap-fit ​​part (9) is fixedly connected to the upper part of the adjusting column (7). A locking nut (10) adapted to the snap-fit ​​platform (6) is threadedly connected to the upper side of the pre-embedded threaded column (4).

2. The prefabricated staircase connection device according to claim 1, characterized in that, Each cast-in-place platform (3) is pre-embedded with a pre-embedded positioning steel plate (11), and several pre-embedded connecting threaded columns (4) are connected to the pre-embedded positioning steel plate (11). Several hooked steel bars (12) with hook-shaped ends are fixedly connected to the lower part of the pre-embedded positioning steel plate (11).

3. The prefabricated staircase connection device according to claim 2, characterized in that, The pre-embedded threaded column (4) is fixedly installed on the upper part of the pre-embedded positioning steel plate (11) by welding.

4. The prefabricated staircase connection device according to claim 2, characterized in that, The pre-embedded threaded column (4) is connected to the upper part of the pre-embedded positioning steel plate (11) by thread.

5. A prefabricated staircase connection device according to claim 1, characterized in that, The bottom of the card-connecting platform (6) is provided with a first grouting hole (13) that communicates with the lower part of the reserved hole (5), and the inner side wall of the first grouting hole (13) is provided with a second grouting hole (14) that communicates with the middle part of the reserved hole (5).

6. A prefabricated staircase connection device according to claim 4, characterized in that, The pre-embedded threaded column (4) is fitted with a reinforcing rib (15) on its side, and the extrusion truncated cone (8) has a relief groove (16) at the bottom that is compatible with the reinforcing rib (15).

7. A prefabricated staircase connection device according to claim 1, characterized in that, The upper part of the assembled staircase body (1) and the connecting plate (2) are both pre-embedded with handrail connecting rods (17), which are used to install handrails.

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