A pre-fabricated stair installation device

Abstract

This utility model provides a prefabricated staircase installation device, belonging to the field of building construction, to solve the problem that embedding mounting plates for railings in prefabricated staircases reduces the structural strength of the prefabricated staircases. By setting a base plate and a first connector, with a first hole for the first connector to extend into and a mounting seat for the railings on the base plate, the first connector is used to fix the prefabricated staircase in the installation position and to provide an installation space for the railings, avoiding the impact of embedding mounting plates on the prefabricated staircases on their structural strength. Furthermore, when the first connector is connected to a screw pre-installed at the installation position, the connecting end of the first connector extends into the grouting hole of the prefabricated staircase, thus filling the grouting hole.

Description

Technical Field

[0001] This utility model belongs to the field of building construction, and in particular relates to a prefabricated staircase installation device. Background Technology

[0002] Precast stairs are stair components that are prefabricated in a factory and then transported to the construction site for installation. Compared to cast-in-place stairs, precast stairs offer advantages such as faster construction speed, more stable quality, and environmental friendliness and energy efficiency, and are widely used in residential and public buildings. During manufacturing, precast stairs have grouting holes at both ends and embedded mounting plates for installing handrails. During installation, the grouting holes allow pre-embedded reinforcing bars to pass through, limiting the movement of the precast stairs. Then, retarder is filled into the grouting holes to seal them, and finally, the handrails are installed onto the mounting plates.

[0003] However, this method of pre-embedding mounting plates for railings on prefabricated stairs reduces the structural strength of the prefabricated stairs, leading to safety hazards during subsequent use. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a prefabricated staircase installation device to solve the problem that embedding an installation plate for installing railings in the prefabricated staircase will reduce the structural strength of the prefabricated staircase.

[0005] To achieve the above and other related objectives, this utility model provides a prefabricated staircase installation device, comprising: an installation plate and a first connector; the installation plate is provided with a first hole for the first connector to extend into and an installation seat for installing a railing; the connecting end of the first connector extends into the first hole and is detachably connected to a screw pre-set at the installation position of the prefabricated staircase, so as to fix the prefabricated staircase and the installation plate at the installation position of the prefabricated staircase.

[0006] Optionally, the mounting plate is L-shaped.

[0007] Optionally, the mounting plate is also provided with a second hole for the first connector to extend into. The first hole and the second hole are coaxially arranged, with the second hole located above the first hole, and the diameter of the first hole is smaller than that of the second hole.

[0008] Optionally, the connecting end of the first connector extends into the first hole and is threadedly connected to a screw pre-installed at the prefabricated staircase installation position.

[0009] Optionally, the mounting base is a hollow sleeve-shaped structure.

[0010] Optionally, the screw end of the first connector is provided with a grouting hole and a vent hole.

[0011] Optionally, it also includes a second connector and a third connector; the second connector has a through hole at its center for a screw pre-installed at the prefabricated staircase installation position to extend into, one end of the second connector has a flange on its outer side for abutting against the bottom of the prefabricated staircase, and the other end is located in the grouting hole of the prefabricated staircase; one end of the third connector has a lifting ring, and the other end is detachably connected to the end of the second connector that extends into the grouting hole of the prefabricated staircase.

[0012] Optionally, the third connector is a hollow columnar structure.

[0013] Optionally, the third connector is threaded to one end of the second connector that extends into the grouting hole of the precast staircase.

[0014] As described above, the prefabricated staircase installation device of this utility model has at least the following beneficial effects: by setting a base plate and a first connector, and providing a first hole for the first connector to extend into and a mounting seat for installing railings on the base plate, the prefabricated staircase is fixed in the installation position using the first connector, and an installation space is provided for the railings, avoiding the impact on the structural strength of the prefabricated staircase by pre-embedding the mounting plate on the prefabricated staircase; in addition, when the first connector is connected to the screw pre-set in the installation position, the connecting end of the first connector will extend into the grouting hole of the prefabricated staircase, so that the connecting end of the first connector plays the role of filling the grouting hole. Attached Figure Description

[0015] Figure 1 The diagram shows the structure of the mounting plate and the first connecting member of a prefabricated staircase installation device according to this utility model.

[0016] Figure 2 The diagram shows the structure of the installation plate and the first connector of the prefabricated staircase installation device of this utility model after they are installed on the prefabricated staircase.

[0017] Figure 3 The diagram shows a cross-sectional view of the installation plate and the first connector of the prefabricated staircase installation device of this utility model after they are installed on the prefabricated staircase.

[0018] Figure 4 The diagram shows the structure of the second and third connectors of a prefabricated staircase installation device according to this utility model.

[0019] Figure 5 The diagram shows the structure of the second and third connectors of the prefabricated staircase installation device of this utility model after they are installed on the prefabricated staircase.

[0020] Component designation explanation:

[0021] 1. Mounting plate; 11. First hole; 12. Mounting base; 13. Second hole; 2. First connector; 21. Grouting hole; 22. Vent hole; 3. Second connector; 31. Flange; 4. Third connector; 41. Lifting ring; 10. Screw; 20. Precast staircase. Detailed Implementation

[0022] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0023] Please refer to all the accompanying drawings below. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0024] The following embodiments are for illustrative purposes only. These embodiments can be combined and are not limited to the content shown in any single embodiment below.

[0025] Please see Figure 1-3 This utility model provides a prefabricated staircase 20 installation device, including: an installation plate 1 and a first connecting member 2; the installation plate 1 is provided with a first hole 11 for the first connecting member 2 to extend into and an installation seat 12 for installing a railing; the bottom surface of the installation seat 12 is used to abut against the top surface of the prefabricated staircase 20. The connecting end of the first connecting member 2 extends into the first hole 11 and is detachably connected to a screw 10 preset at the installation position of the prefabricated staircase 20, so as to fix the prefabricated staircase 20 and the installation plate 1 at the installation position of the prefabricated staircase 20. The first connecting member 2 and the screw 10 can be connected by snap-fit ​​or other means. In this embodiment, the connecting section of the first connecting member 2 is connected to the screw 10 by a thread, that is, an external thread is provided on the outer side surface of the screw 10, and an installation hole is provided at the center of the first connecting member 2, and an internal thread is provided on the inner side wall of the installation hole, so as to realize the connection between the connecting section of the first connecting member 2 and the screw 10 by a thread.

[0026] This embodiment uses a base plate and a first connector 2, with a first hole 11 for the first connector 2 to extend into and a mounting base 12 for installing railings on the base plate. This allows the first connector 2 to fix the prefabricated staircase 20 in the installation position and provides an installation space for the railings, avoiding the impact on the structural strength of the prefabricated staircase 20 caused by pre-embedding the mounting plate 1 on the prefabricated staircase 20. In addition, when the first connector 2 is connected to the screw 10 pre-installed in the installation position, the connecting end of the first connector 2 extends into the grouting hole of the prefabricated staircase 20, so that the connecting end of the first connector 2 can fill the grouting hole.

[0027] Mounting plate 1 can be a flat plate structure made of metal. In this embodiment, mounting plate 1 is L-shaped. One inner side wall of mounting plate 1 abuts against the top surface of prefabricated staircase 20, and the other inner side wall abuts against the side of prefabricated staircase 20. This ensures the stability of the connection between mounting plate 1 and prefabricated staircase 20, and ensures that the railing will not shake after it is installed on mounting base 12.

[0028] The mounting plate 1 also has a second hole 13 for the first connector 2 to extend into. The first hole 11 and the second hole 13 are coaxially arranged, with the second hole 13 located above the first hole 11. The diameter of the first hole 11 is smaller than that of the second hole 13, forming a countersunk hole. The second hole 13 is used to accommodate the fixed end of the first connector 2, thereby preventing the fixed end of the first connector 2 from interfering with the construction workers' work and movement during and after installation. In addition, the rounded corners of the top surface of the mounting plate 1 also prevent the edges of the mounting plate 1 from scratching the construction workers and from affecting their movement.

[0029] Mounting base 12 can be a mounting post, used to connect to the railing, for example, by welding. In this embodiment, mounting base 12 is a hollow sleeve-shaped structure. During construction, the lower end of the railing support post can extend into mounting base 12 to initially limit the position of the railing support post, facilitating installation by construction personnel. Then, construction personnel can use welding or other methods to weld the railing support post to the mounting sleeve, ensuring the stability of the railing.

[0030] The screw end of the first connector 2 is provided with a grouting hole 21 and a vent hole 22. Since the grouting holes of the precast staircase 20 are not completely filled after the first connector 2 is installed onto the screw rod 10, a grouting hole 21 is provided at the screw end of the first connector 2 to inject concrete grout into the grouting holes of the precast staircase 20 to completely fill the grouting holes. Simultaneously, since a closed cavity is formed inside the grouting hole after the screw rod 10 and the first connector 2 are connected, this embodiment also provides a vent hole 22 at the screw end of the first connector 2 to ensure smooth grouting.

[0031] Please see Figure 4-5 This embodiment provides a prefabricated staircase 20 installation device, which further includes a second connector 3 and a third connector 4. The second connector 3 has a through hole at its center for a screw 10 pre-installed at the prefabricated staircase 20 installation position to extend into. One end of the second connector 3 has a flange 31 on its outer side for abutting against the bottom of the prefabricated staircase 20, and the other end is located within the grouting hole of the prefabricated staircase 20. One end of the third connector 4 has a lifting ring 41, and the other end is detachably connected to the end of the second connector 3 that extends into the grouting hole of the prefabricated staircase 20. The bottom of the grouting hole of the prefabricated staircase 20 is a countersunk hole structure to accommodate the flange 31 of the second connector 3. The lifting ring 41 on the third connector 4 is used to lift the prefabricated staircase 20 during construction, so that the prefabricated staircase 20 can be installed in the preset position using a tower crane, electric hoist, or other device. After the prefabricated staircase 20 is installed in the preset position, the third connector 4 is removed from the second connector 3, and then the mounting plate 1 and the first connector 2 are installed to fix the prefabricated staircase 20 in the preset position. It is understood that the second connector does not need to be removed from the prefabricated staircase 20 at the mounting hole, and its part extending into the grouting hole is directly used as the material to fill the grouting hole.

[0032] The third connector 4 can be a hollow columnar structure, so that during construction, the construction personnel can see directly through the third connector 4 whether the screw 10 has been inserted into the grouting hole, so as to complete the installation.

[0033] The third connector 4 is threadedly connected to one end of the second connector 3 that extends into the grouting hole of the precast staircase 20. Specifically, the inner wall of the through hole of the third connector 4 is provided with an internal thread, and the outer wall of the third connector 4 is provided with an external thread, thereby realizing the threaded connection between the third connector 4 and the second connector 3.

[0034] In this embodiment, a second connector 3 and a third connector 4 are provided and are detachably connected. A lifting ring 41 is provided at the end of the third connector 4 away from the second connector 3. This avoids the need to reserve a lifting ring 41 for hoisting the prefabricated staircase 20 during the manufacturing process and also avoids the setting of the lifting ring 41 affecting the structural strength of the prefabricated staircase 20.

[0035] In summary, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0036] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A prefabricated staircase installation device, characterized in that, include: Mounting plate and first connector; The mounting plate is provided with a first hole for the first connector to extend into and a mounting base for mounting the railing; The connecting end of the first connector extends into the first hole and is detachably connected to the screw preset at the installation position of the prefabricated staircase, so as to fix the prefabricated staircase and the mounting plate at the installation position of the prefabricated staircase.

2. The prefabricated staircase installation device according to claim 1, characterized in that: The mounting plate is L-shaped.

3. The prefabricated staircase installation device according to claim 2, characterized in that: The mounting plate is also provided with a second hole for the first connector to extend into. The first hole and the second hole are coaxially arranged, the second hole is located above the first hole, and the diameter of the first hole is smaller than that of the second hole.

4. The prefabricated staircase installation device according to claim 3, characterized in that: The connecting end of the first connector extends into the first hole and is threadedly connected to the screw at the prefabricated staircase installation position.

5. A prefabricated staircase installation device according to claim 1, characterized in that: The mounting base is a hollow sleeve-shaped structure.

6. The prefabricated staircase installation device according to claim 1, characterized in that: The screw end of the first connector is provided with a grouting hole and a vent hole.

7. The prefabricated staircase installation device according to claim 1, characterized in that: It also includes a second connector and a third connector; The second connector has a through hole at its center for a screw that is pre-installed at the prefabricated staircase installation position to extend into. One end of the second connector has a flange on its outer side for abutting against the bottom of the prefabricated staircase, and the other end is located in the grouting hole of the prefabricated staircase. One end of the third connector has a lifting ring, and the other end is detachably connected to the end of the second connector that extends into the grouting hole of the prefabricated staircase.

8. A prefabricated staircase installation device according to claim 7, characterized in that: The third connector is a hollow columnar structure.

9. A prefabricated staircase installation device according to claim 8, characterized in that: The third connector is threadedly connected to one end of the second connector that extends into the grouting hole of the precast staircase.

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