Concrete assembly type stair

Abstract

The utility model relates to the technical field of building construction, in particular to a concrete assembly type stair which comprises a prefabricated stair piece provided with a mounting hole and a reinforcing assembly arranged in the mounting hole, and the reinforcing assembly comprises a sleeve, a plurality of connecting rods and a plurality of sliding blocks. The sleeve is used for sleeving a mounting steel bar of a floor slab main body; the plurality of connecting rods are radially distributed by taking the sleeve as the center and are rotationally connected to the lower end of the sleeve; the sliding blocks are in one-to-one correspondence with the connecting rods and rotationally connected to the ends, away from the sleeves, of the connecting rods. A plurality of guide rods distributed in a radial mode are arranged on the inner side wall of the mounting hole in the radial direction. The sliding blocks are in one-to-one correspondence with the guide rods and are slidably connected to the guide rods. The sleeve is moved downwards to drive the connecting rods to rotate, so that the sliding blocks slide along the corresponding guide rods to extrude the mounting holes. Vibration of the prefabricated stair piece can be reduced, so that cement mortar is prevented from being separated from mounting holes of the prefabricated stair piece in the solidification period.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a precast concrete staircase. Background Art

[0002] A reinforced concrete precast staircase is formed by prefabricating a formwork, placing a steel bar framework in the formwork, and pouring to form a precast staircase member. Installation holes are reserved in the formwork according to the distance of the installation steel bars of the floor slab main body. After the precast staircase member is manufactured, the precast staircase member is placed on the floor slab main body by a crane, and the installation steel bars are inserted into the installation holes to complete the preliminary docking. At this time, cement mortar is poured into the installation holes, and the precast staircase member and the floor slab main body are firmly connected through the cement mortar.

[0003] However, there are the following problems after the cement mortar is poured: During the solidification period after the cement mortar is poured, construction at the construction site is still carried out normally. Construction inside the building and human walking will cause vibrations of the precast staircase member. When vibrating, the un-solidified cement mortar will separate from the installation holes of the precast staircase member, resulting in fractures between the solidified cement joints and the precast staircase member, and the connection between the precast staircase member and the floor slab main body is unstable. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a precast concrete staircase, which can reduce the vibration of the precast staircase member, thereby preventing the cement mortar from separating from the installation holes of the precast staircase member during solidification.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A precast concrete staircase includes a precast staircase member with installation holes and a reinforcement assembly arranged in the installation holes. The reinforcement assembly includes a sleeve, a plurality of connecting rods and a plurality of sliders; the sleeve is used for sleeving on the installation steel bars of the floor slab main body; the plurality of connecting rods are radially distributed with the sleeve as the center and are rotatably connected to the lower end of the sleeve; the sliders are respectively corresponding to the connecting rods and are rotatably connected to the ends of the connecting rods far away from the sleeve; a plurality of guide rods radially distributed are arranged on the inner side wall of the installation hole; the sliders are respectively corresponding to the guide rods and are slidably connected to the guide rods;

[0007] By moving the sleeve downward to drive each connecting rod to rotate, each slider slides along the corresponding guide rod to squeeze the installation hole.

[0008] As an optional scheme, a transverse groove is radially opened on the inner side wall of the installation hole, and the guide rod is arranged in the transverse groove.

[0009] As an alternative solution, the slider is slidably sleeved on the guide rod, an elastic member connecting the slider is sleeved on the guide rod, and the slider presses against the inner wall of the transverse groove through the elastic member.

[0010] As an alternative solution, the elastic member is a compression spring or elastic plastic.

[0011] As an alternative solution, an outwardly expanding support opening is provided at the upper end of the sleeve, the support opening can form an interference fit with the mounting hole, and a plurality of perfusion holes communicating with the mounting hole are provided on the transition surface connecting the sleeve.

[0012] As an alternative solution, when the connecting rod rotates to be in the same direction as the guide rod, the lower end surface of the sleeve is flush with the lower surface of the precast stair component.

[0013] Due to the adoption of the above technical solution, the present utility model will have the following beneficial effects:

[0014] A concrete precast stair provided by the present utility model drives each connecting rod to rotate by moving the sleeve downward, so that each slider slides along the corresponding guide rod towards the inner wall of the mounting hole until the slider presses against the mounting hole. Since the guide rod and the connecting rod are both radially distributed around the sleeve, the acting force of each slider on the mounting hole can be used as the supporting force for the precast stair component, and the precast stair component can be reinforced to prevent the precast stair component from displacing relative to the floor main body along the contact surface.

[0015] Since the floor main body is already fixed, preventing the precast stair component from displacing relative to the floor main body along the contact surface can reduce the vibration of the precast stair component. In this way, the cement mortar in the mounting hole will not break away from the mounting hole during the solidification period. After the cement mortar solidifies, the connection between the cement and the precast stair component is not likely to break, thereby improving the connection stability between the precast stair component and the floor main body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is an overall schematic diagram of the concrete precast stair according to an embodiment of the present utility model in the use state;

[0018] Figure 2 is Figure 1 a partial top view of the concrete precast stair according to the embodiment;

[0019] Figure 3 For Figure 1 The three-dimensional view of the reinforcement component of the precast concrete staircase described in the embodiment;

[0020] Figure 4 For Figure 1 The partial cross-sectional view of the precast concrete staircase described in the embodiment;

[0021] Figure 5 The partial cross-sectional view of the precast concrete staircase according to another embodiment of the present invention.

[0022] Reference numerals: 1, precast staircase member; 11, mounting hole; 12, guide rod; 13, transverse groove; 14, elastic member; 2, reinforcement component; 21, sleeve; 22, connecting rod; 23, slider; 24, support opening; 241, pouring hole; 3, floor slab main body; 31, mounting steel bar. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0026] Please refer to Figures 1-4, in an embodiment of a concrete prefabricated staircase of the present utility model, the concrete prefabricated staircase includes a prefabricated staircase member 1 and a reinforcement assembly 2. Installation holes 11 vertically penetrating the prefabricated staircase member 1 are provided at both the upper and lower ends of the prefabricated staircase member 1. The prefabricated staircase member 1 is placed on the floor slab main body 3 by a crane, and the installation steel bars 31 on the floor slab main body 3 are inserted into the installation holes 11 to complete the preliminary docking. The reinforcement assembly 2 is arranged in the installation holes 11 and is used to reinforce the prefabricated staircase member 1 to prevent the prefabricated staircase member 1 from displacing relative to the floor slab main body 3 along the contact surface.

[0027] Specifically, the above-mentioned reinforcement assembly 2 includes a sleeve 21, multiple connecting rods 22, and multiple sliders 23. Among them, the sleeve 21 is arranged in the installation hole 11 and is used to sleeve on the installation steel bar 31. The multiple connecting rods 22 are radially distributed with the sleeve 21 as the center and are rotatably connected to the lower end of the sleeve 21. The sliders 23 correspond to the connecting rods 22 one by one and are rotatably connected to the ends of the connecting rods 22 away from the sleeve 21. Here, the sliders 23 can be set in a cuboid shape, and the connecting rods 22 can be set to be composed of two long strips, and the two long strips are respectively rotatably connected to both sides of the slider 23. Multiple guide rods 12 radially arranged in a radial pattern on the horizontal plane are provided on the inner side wall of the installation hole 11. The sliders 23 correspond to the guide rods 12 one by one and are slidably connected to the guide rods 12.

[0028] When this embodiment is in use, by moving the sleeve 21 downward to drive each connecting rod 22 to rotate, the respective sliders 23 slide along the corresponding guide rods 12 towards the inner side wall of the installation hole 11 until the sliders 23 press against the installation hole 11. Since both the guide rods 12 and the connecting rods 22 are radially distributed with the sleeve 21 as the center, the acting forces of the respective sliders 23 on the installation hole 11 can be used as the supporting forces for the prefabricated staircase member 1, and the prefabricated staircase member 1 can be reinforced to prevent the prefabricated staircase member 1 from displacing relative to the floor slab main body 3 along the contact surface. At the same time, the sliders 23 also generate a downward pressure on the guide rods 12 under the action of the connecting rods 22. This downward pressure increases the pressure of the prefabricated staircase member 1 on the floor slab main body 3, thereby increasing the maximum static friction force that the prefabricated staircase member 1 can withstand to further prevent the prefabricated staircase member 1 from displacing relative to the floor slab main body 3 along the contact surface.

[0029] Since the floor slab main body 3 is already fixed, preventing the prefabricated staircase member 1 from displacing relative to the floor slab main body 3 along the contact surface can reduce the vibration of the prefabricated staircase member 1. In this way, the cement mortar in the installation hole 11 will not break away from the installation hole 11 during the solidification period. After the cement mortar solidifies, the connection between the cement and the prefabricated staircase member 1 is not prone to breakage, thereby improving the stability of the connection between the prefabricated staircase member 1 and the floor slab main body 3.

[0030] Further, to prevent the sleeve 21 from moving upward and disengaging from the installation steel bar 31 under the reaction force of the connecting rod 22, in this embodiment, when the connecting rod 22 rotates to the same direction as the guide rod 12, the lower end surface of the sleeve 21 can be set to be flush with the lower surface of the precast staircase member 1. In this way, when the lower end surface of the sleeve 21 contacts the upper surface of the floor slab main body 3, the connecting rod 22 just rotates in the same direction as the guide rod 12. At this time, the connecting rod 22 is in force balance and stops rotating and is perpendicular to the sleeve 21, so that the sleeve 21 will not be affected by the reaction force of the connecting rod 22.

[0031] Specifically, a circular support opening 24 that expands outward can be provided at the upper end of the sleeve 21. The diameter of the support opening 24 is slightly larger than the diameter of the installation hole 11 and has a certain elasticity, so that the support opening 24 can form an interference fit with the installation hole 11. The transition surface connecting the support opening 24 to the sleeve 21 is inclined, and a plurality of perfusion holes 241 communicating with the installation hole 11 are provided on this transition surface. When the support opening 24 is pressed downward until the support opening 24 is completely immersed in the installation hole 11, due to the interference fit between the support opening 24 and the installation hole 11, the upward movement of the sleeve 21 can be restricted. At the same time, the support opening 24 can also support the installation hole 11 on the horizontal plane, thereby further preventing the precast staircase member 1 from displacing relative to the floor slab main body 3 along the contact surface.

[0032] Specifically, a square transverse groove 13 can be radially provided on the inner side wall of the installation hole 11 to accommodate the guide rod 12, and the guide rod 12 is coaxially and fixedly connected in the transverse groove 13. The slider 23 is slidably sleeved on the guide rod 12, and an elastic member 14 connecting the slider 23 is sleeved between the slider 23 and the inner wall of the transverse groove 13 on the guide rod 12. The elastic member 14 can be set as a compression spring. One end of the compression spring is connected to the slider 23, and the other end of the compression spring is connected to the inner wall of the transverse groove 13. The slider 23 slides along the guide rod 12 and presses the inner wall of the transverse groove 13 through the compression spring to form a support for the installation hole 11.

[0033] Please refer to Figure 5 , in another embodiment, the elastic member 14 can be set as elastic plastic. One end of the elastic plastic is connected to the slider 23, and the other end of the elastic plastic is close to the inner wall of the transverse groove 13. The slider 23 slides along the guide rod 12 and presses the inner wall of the transverse groove 13 through the elastic plastic to form a support for the installation hole 11.

[0034] The usage method or working principle of the present utility model is as follows:

[0035] When installing the precast staircase member 1, the precast staircase member 1 is placed on the floor slab main body 3 by a crane, and the sleeve 21 of the reinforcement assembly 2 is sleeved on the installation steel bar 31 to complete the preliminary docking (as Figure 4 and Figure 5As shown, then knock the support opening 24 into the installation opening, so that the sleeve 21 moves downward to drive each connecting rod 22 to rotate, causing each slider 23 to slide along the corresponding guide rod 12 towards the inner wall of the installation hole 11 until the slider 23 squeezes the installation hole 11 through the elastic member 14 to form a support for the installation hole 11. Cooperating with the support opening 24 can reinforce the precast staircase member 1 to prevent the precast staircase member 1 from displacing relative to the floor main body 3 along the contact surface. Finally, pour cement mortar into the support opening 24, and the cement mortar flows into the installation hole 11 through the pouring hole 241. Since the precast staircase member 1 can be prevented from displacing relative to the floor main body 3 along the contact surface during the solidification of the cement mortar, the vibration of the precast staircase member 1 can be reduced. In this way, the cement mortar in the installation hole 11 will not be separated from the installation hole 11 during the solidification period.

[0036] The above embodiments only represent several implementation manners of the present utility model, and their descriptions are relatively specific and detailed, but should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model.

Claims

1. A concrete assembled staircase, comprising a prefabricated staircase member (1) with a mounting hole (11), characterized in that: It also includes a reinforcement component (2) arranged in the installation hole (11), the reinforcement component (2) including a sleeve (21), a plurality of connecting rods (22) and a plurality of sliding blocks (23); the sleeve (21) is used to be sleeved on the installation steel bars (31) of the floor slab body (3); the plurality of connecting rods (22) are radially distributed with the sleeve (21) as the center and are rotatably connected to the lower end of the sleeve (21); the plurality of sliding blocks (23) respectively correspond to the connecting rods (22) one by one and are rotatably connected to one end of the connecting rod (22) away from the sleeve (21); the inner side wall of the installation hole (11) is provided with a plurality of guide rods (12) distributed radially along the radial direction; the sliding blocks (23) respectively correspond to the guide rods (12) one by one and are slidably connected to the guide rods (12); The sleeve (21) is moved downward to drive each of the connecting rods (22) to rotate, so that each of the sliding blocks (23) slides along the corresponding guide rod (12) to squeeze the mounting hole (11).

2. A concrete assembled staircase according to claim 1, characterized in that: The inner side wall of the mounting hole (11) is provided with a transverse groove (13) in the radial direction, and the guide rod (12) is arranged in the transverse groove (13).

3. A concrete assembled staircase according to claim 2, characterized in that: The slider (23) is slidably sleeved on the guide rod (12), an elastic member (14) connected to the slider (23) is sleeved on the guide rod (12), and the slider (23) presses the inner wall of the transverse groove (13) through the elastic member (14).

4. A concrete assembled staircase according to claim 3, characterized in that: The elastic member (14) is a compression spring or elastic plastic.

5. The concrete assembled staircase according to claim 1, characterized in that: The upper end of the sleeve (21) is provided with a support opening (24) that expands outwards, and the support opening (24) can form an interference fit with the mounting hole (11). The transition surface where the support opening (24) connects to the sleeve (21) is provided with a plurality of injection holes (241) that are connected to the mounting hole (11).

6. The concrete assembled staircase according to claim 1, characterized in that: When the connecting rod (22) is rotated to be in the same direction as the guide rod (12), the lower end surface of the sleeve (21) is flush with the lower surface of the prefabricated staircase component (1).

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