Anti-seismic prefabricated concrete stair

Abstract

The utility model relates to the technical field of stairs, and discloses an anti-seismic prefabricated concrete stair which comprises a stair body and two connecting plates, two mounting holes are formed in the upper surfaces of the two connecting plates in a penetrating mode, and the bottom faces of the two connecting plates are connected with two symmetrically-arranged rotating assemblies. The other ends of the four rotating assemblies are all connected with rotating rings, the bottom faces of the four rotating rings are all fixedly connected with conical blocks, and the four rotating rings are located under the four mounting holes correspondingly. According to the anti-seismic prefabricated concrete stair, when an external crane lifts the stair body to an installation area, an installation worker can rotate a rotating ring and a conical block to a vertical state through a rotating assembly, so that the conical block can be inserted into a connecting hole of a building step, and then the stair body continues to be put down; and at the moment, a worker can visually see whether the mounting hole in the stair body is aligned with the connecting hole of the building step or not, so that the hole aligning time is shortened, and the mounting efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of stairs, in particular to an earthquake-resistant prefabricated concrete staircase. Background Art

[0002] Precast concrete stairs are concrete staircase components manufactured in factories or prefabrication sites and then installed on site in buildings. This type of staircase is prefabricated in a controlled environment and is usually made of concrete or prestressed concrete. When an earthquake occurs, the building will be subjected to horizontal seismic forces, and the stairs, as part of the building structure, will also be subject to certain vibrations. Therefore, most of the current precast concrete stairs have earthquake-resistant properties.

[0003] After searching, the patent with the authorization announcement number CN218292555U discloses a new type of earthquake-resistant concrete prefabricated staircase, including a base, a fixing seat is installed at the top of the base, a staircase body is installed on the right side of the fixing seat, steps arranged at equal distances are installed at the top of the staircase body, and front and rear symmetrical mounting holes are vertically opened inside the staircase body. This device inserts a threaded rod into the inside of the mounting hole, so that the bottom end of the threaded rod passes through the movable frame, and the steps can be easily installed on the top of the staircase body, and the fixing block and the support gasket are installed at the bottom of the movable frame, so that the steps and the staircase body can be kept stable, and the prefabricated staircase can be easily assembled, and by arranging a shock-absorbing spring and a damping block inside the movable frame, the longitudinal wave energy during an earthquake can be effectively absorbed to prevent the longitudinal wave from breaking the prefabricated staircase during an earthquake, so that the entire staircase can be kept stable, and the purpose of earthquake resistance is achieved.

[0004] However, the above-mentioned new earthquake-resistant concrete prefabricated stairs still have the following problems:

[0005] The current earthquake-resistant concrete prefabricated stairs are heavy overall, so they often need to be lifted up by a crane first, and then the mounting holes at the upper and lower ends of the prefabricated stairs are aligned with the mounting holes on the steps, and finally the two are fixed with bolts. However, due to the obstruction of vision and the vibration of the crane itself, it is difficult to see at a glance whether the mounting holes are aligned exactly until the prefabricated stairs come into contact with the steps. If they are not aligned, the crane needs to be lifted up a certain distance for adjustment. The overall operation is time-consuming and laborious, and the current prefabricated stairs do not have the function of assisting alignment, which is inconvenient. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a seismic-resistant precast concrete staircase. When workers lift the staircase body to the installation area through an external crane, the installers can rotate the rotating ring and the conical block to a vertical state through a rotating assembly so that the conical block can be inserted into the connecting hole of the building steps, and then continue to lower the staircase body. At this time, the workers can intuitively see whether the installation holes on the staircase body are aligned with the connecting holes on the building steps, thereby reducing the hole alignment time and improving the installation efficiency.

[0007] The utility model provides the following technical solution: an earthquake-resistant precast concrete staircase, comprising a staircase body and two connecting plates installed at both ends of the staircase body, the upper surfaces of the two connecting plates are penetrated with two mounting holes, the bottom surfaces of the two connecting plates are connected to two symmetrically arranged rotating components, the other ends of the four rotating components are connected to rotating rings, the bottom surfaces of the four rotating rings are fixedly connected to conical blocks, and the four rotating rings are respectively located directly below the four mounting holes.

[0008] Furthermore, two receiving cavities are provided on the bottom surfaces of the two connecting plates, and the ends of the two rotating components below the same connecting plate away from the conical blocks are respectively located in the two receiving cavities.

[0009] Furthermore, the rotating assembly includes two suspension rods and two rotating balls, one end of the two suspension rods are rotatably connected to the outer wall of the rotating ring, the other ends of the two suspension rods are respectively fixedly connected to the outer walls of the two rotating balls, and the outer walls of the two rotating balls are respectively slidably connected to the inner walls of the two storage cavities.

[0010] Furthermore, thread grooves are provided at the lower ends of the four mounting holes, threaded rings are threadedly connected to the inner walls of the four thread grooves, and the lower ends of the four thread rings are rotatably connected to the upper ends of the four rotating rings respectively.

[0011] Furthermore, the bottom surfaces of the four conical blocks are each provided with a plurality of openings.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] This earthquake-resistant precast concrete staircase has two rotating components arranged under the two connecting plates at both ends of the stair body, and a rotating ring and a tapered block are respectively connected by the two rotating components. When the workers lift the stair body to the installation area through an external crane, the installers can rotate the rotating ring and the tapered block to a vertical state through the rotating components, so that the tapered block can be inserted into the connecting hole of the building steps, and then continue to lower the stair body. At this time, the workers can intuitively see whether the installation holes on the stair body are aligned with the connecting holes on the building steps, thereby reducing the hole alignment time and improving the installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall appearance of the utility model;

[0015] Figure 2 This is a schematic diagram of the overall appearance of the utility model from another perspective;

[0016] Figure 3 It is an exploded schematic diagram of the connecting plate, rotating assembly, threaded ring and other components in the utility model;

[0017] Figure 4 This is a schematic diagram of another form of the connecting plate, rotating assembly, threaded ring and other components in the utility model.

[0018] In the figure: 1. stair body; 2. connecting plate; 3. suspension rod; 4. conical block; 5. threaded ring; 6. rotating ball; 7. rotating ring; 21. mounting hole; 22. threaded groove; 23. storage cavity; 41. opening. DETAILED DESCRIPTION

[0019] 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. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] See also Figure 1-Figure 4 A seismic-resistant precast concrete staircase comprises a staircase body 1 and two connecting plates 2 installed at both ends of the staircase body 1, the upper surfaces of the two connecting plates 2 are penetrated with two mounting holes 21, the bottom surfaces of the two connecting plates 2 are connected to two symmetrically arranged rotating components, the other ends of the four rotating components are connected to rotating rings 7, the bottom surfaces of the four rotating rings 7 are fixedly connected to conical blocks 4, and the four rotating rings 7 are respectively located directly below the four mounting holes 21.

[0021] The earthquake-resistant precast concrete staircase in the utility model is similar to the existing earthquake-resistant precast concrete staircase structure, such as a new earthquake-resistant precast concrete staircase disclosed in the patent with publication number CN218292555U. Figures 1 to 4 As shown, when the earthquake-resistant precast concrete staircase in the utility model is installed with the steps of a building, the staircase body 1 is first hoisted to the installation area by an external crane, and then the installer rotates the four rotating rings 7 and the four conical blocks 4 to a vertical state through four rotating components. At this time, the rotating rings 7 and the conical blocks 4 can be just below the installation holes 21, and then the conical blocks 4 are inserted into the connecting holes on the steps of the building, and then the staircase body 1 is further lowered by the crane. At this time, the workers can intuitively see whether the installation holes 21 on the staircase body 1 are aligned with the connecting holes of the steps of the building, thereby reducing the multi-hole time and improving the installation efficiency.

[0022] After the bottom surface of the stair body 1 contacts the upper surface of the building steps, the conical block 4 is still located inside the connecting hole of the building steps. Bolts can be passed through the rotating ring 7 and the inside of the conical block 4 and fixed to the connecting hole of the building steps, thereby completing the installation connection between the stair body 1 and the building steps, which is convenient and quick.

[0023] Please refer to Figure 2-Figure 4 The bottom surfaces of the two connecting plates 2 are provided with two receiving chambers 23, and the ends of the two rotating components below the same connecting plate 2 away from the conical block 4 are respectively located in the two receiving chambers 23. By providing the receiving chambers 23, the rotating components can be stored through the receiving chambers 23 when no hoisting installation is performed, so that the storage components do not occupy external space.

[0024] Please refer to Figure 3 and Figure 4 The rotating assembly includes two suspension rods 3 and two rotating balls 6. One end of the two suspension rods 3 is rotatably connected to the outer wall of the rotating ring 7, and the other ends of the two suspension rods 3 are respectively fixedly connected to the outer walls of the two rotating balls 6. The outer walls of the two rotating balls 6 are respectively slidably connected to the inner walls of the two storage chambers 23.

[0025] More specifically, when not hoisted, the rotating ball 6 is located in the middle of the storage cavity 23, and the rotating ring 7 is located in the mounting hole 21, so that the suspension rod 3 is in an inclined state at this time, so it does not occupy external space; when hoisting, the rotating ring 7 is taken out of the mounting hole 21, and then the rotating ball 6 is slid along the storage cavity 23 until the rotating ball 6 slides to the bottom of the storage cavity 23. At this time, the rotating ring 7 is still directly below the mounting hole 21, and then the crane is continued to control the stair body 1 to descend until the conical block 4 is inserted into the connecting hole of the building step and stops. At this time, the stair body 1 is lowered again, because the positions of the two conical blocks 4 under the same connecting plate 2 are limited by the connecting hole of the building step and cannot move and tilt. Therefore, the rotating ball 6 will move and be stored along the storage cavity 23 until the stair body 1 is completely lowered to contact and fix with the rotating ring 7 and then the rotating ball 6 stops moving, so that the mounting hole 21 on the stair body 1 and the connecting hole of the building step can always be aligned, which is convenient for workers to watch and align.

[0026] Please refer to Figure 1 , Figure 3 and Figure 4The lower ends of the four mounting holes 21 are all provided with threaded grooves 22, the inner walls of the four threaded grooves 22 are all threadedly connected with threaded rings 5, and the lower ends of the four threaded rings 5 ​​are respectively rotatably connected to the upper ends of the four rotating rings 7. By providing the threaded grooves 22 and the threaded rings 5, the crane can be installed and fixed by the threaded rings 5 ​​and the threaded grooves 22 before and after the crane is hoisted to the staircase body 1, which can not only reduce the external space occupied, but also limit the suspension rod 3 and the rotating ball 6 so that they will not unfold by themselves.

[0027] Please refer to Figure 3 and Figure 4 The bottom surfaces of the four conical blocks 4 are all provided with a plurality of openings 41. By providing the openings 41, a certain degree of buffering can be provided after the connecting hole of the building step is inserted, so that the insertion can be deeper.

[0028] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A seismic-resistant precast concrete staircase, comprising a staircase body (1) and two connecting plates (2) mounted at both ends of the staircase body (1), wherein the upper surfaces of the two connecting plates (2) are penetrated by two mounting holes (21), and characterized in that: The bottom surfaces of the two connecting plates (2) are connected to two symmetrically arranged rotating components, the other ends of the four rotating components are connected to rotating rings (7), the bottom surfaces of the four rotating rings (7) are fixedly connected to conical blocks (4), and the four rotating rings (7) are respectively located directly below the four mounting holes (21).

2. The earthquake-resistant precast concrete staircase according to claim 1, characterized in that: Two receiving cavities (23) are provided on the bottom surfaces of the two connecting plates (2), and the ends of the two rotating components below the same connecting plate (2) away from the conical block (4) are respectively located in the two receiving cavities (23).

3. The earthquake-resistant precast concrete staircase according to claim 2 is characterized in that: The rotating assembly comprises two suspension rods (3) and two rotating balls (6), one end of each of the two suspension rods (3) is rotatably connected to the outer wall of the rotating ring (7), the other ends of the two suspension rods (3) are respectively fixedly connected to the outer walls of the two rotating balls (6), and the outer walls of the two rotating balls (6) are respectively slidably connected to the inner walls of the two storage chambers (23).

4. A seismic-resistant precast concrete staircase according to claim 1, 2 or 3, characterized in that: The lower ends of the four mounting holes (21) are each provided with a threaded groove (22), the inner walls of the four threaded grooves (22) are each threadedly connected with a threaded ring (5), and the lower ends of the four threaded rings (5) are rotatably connected to the upper ends of four rotating rings (7) respectively.

5. The earthquake-resistant precast concrete staircase according to claim 1, 2 or 3, characterized in that: The bottom surfaces of the four conical blocks (4) are each provided with a plurality of openings (41).

6. The earthquake-resistant precast concrete staircase according to claim 3 is characterized by: The bottom surfaces of the four conical blocks (4) are each provided with a plurality of openings (41).

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