Fastening device for PC prefabricated components

Abstract

This utility model discloses a fastening device for precast PC components, relating to the field of building industry technology. It includes two sets of PC component bodies. Each PC component body has a pair of symmetrically arranged mounting seats fixedly connected to one end of its outer wall, and a pair of symmetrically arranged fixing blocks fixedly connected to the other end of its outer wall. Each fixing block has an mounting block fixedly connected to its other end. Both the fixing blocks and mounting blocks are aligned with their corresponding mounting seats on the same horizontal line. A snap-fit ​​mechanism and a fastening mechanism are provided between the fixing blocks and the mounting seats. The pre-snap-fit ​​ensures precise alignment of the mounting blocks and fixing blocks of the two sets of PC component bodies, providing a precise positioning basis for subsequent screw fixing. This avoids misalignment or instability during final fixing, ensuring the stability and robustness of the overall structure. Through the pre-snap-fit, installers no longer need to manually adjust and align the PC components, reducing the complexity of manual operation.

Description

Technical Field

[0001] This utility model relates to the field of building industry technology, specifically a fastening device for PC precast components. Background Technology

[0002] Precast concrete (PC) components refer to concrete components that are prefabricated in a factory and then assembled and connected on the construction site to form a complete building structure. PC stands for "precast concrete," and it is widely used in the field of industrialized construction.

[0003] Precast walls in PC components are lifted using a tower crane (or truck crane) and raised above the target beam. With the assistance of construction personnel, they are slowly lowered to align the embedded sleeves at the bottom of the wall with the reserved reinforcing bars at the top of the beam. Subsequently, the hoisting of adjacent walls is carried out.

[0004] However, the lateral connection of adjacent precast walls mainly relies on temporary binding and fixing with steel wire ropes. The joint rigidity is poor, making it difficult to ensure the integrity of the structure. The temporary fixing method is prone to wall verticality deviation or joint misalignment. During subsequent cast-in-place concrete pouring, it is easy to cause formwork bulging at the joints or wall surface flatness exceeding the tolerance, affecting the molding quality.

[0005] Therefore, those skilled in the art have provided a fastening device for PC precast components to solve the problems mentioned in the background art. Utility Model Content

[0006] The purpose of this utility model is to provide a fastening device for PC precast components, so as to solve the problem mentioned in the background art that PC precast components are not firmly fixed by steel wire rope alone.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A fastening device for precast PC components includes two sets of PC component bodies, a snap-fit ​​mechanism, and a fastening mechanism. Each PC component body has a pair of symmetrically arranged mounting seats fixedly connected to one end of its outer wall, and a pair of symmetrically arranged fixing blocks fixedly connected to the other end of its outer wall. Each fixing block has an mounting block fixedly connected to its other end. The fixing blocks and mounting blocks are on the same horizontal line as their corresponding mounting seats. A snap-fit ​​mechanism and a fastening mechanism are provided between the fixing blocks and the mounting blocks and the mounting seats.

[0009] As a further embodiment of this utility model: each of the mounting bases has a mounting cavity, and two sets of first reset springs are fixedly connected to the top of each mounting cavity. Each set of first reset springs has a pressing plate fixedly connected to its bottom end, and the pressing plate abuts against the corresponding fixing block.

[0010] As a further embodiment of this utility model: a pad is fixedly connected to the bottom of each mounting cavity, and two sets of second return springs are fixedly connected to the upper end of each pad. A snap-fit ​​plate is fixedly connected to the upper end of each of the two sets of second return springs. A snap-fit ​​groove is opened at the bottom of each mounting base, and the snap-fit ​​groove is movably snapped into the corresponding snap-fit ​​plate.

[0011] As a further embodiment of this utility model: two sets of first screw holes are provided in the mounting base, the mounting cavity, and the upper end of the mounting block. First fastening bolts are threadedly connected between the multiple sets of first screw holes. An extension plate is fixedly connected to the outer wall of the nut of the first fastening bolt. Multiple sets of second screw holes are provided in the extension plate and the upper end face of the mounting base. Second fastening bolts are threadedly connected between the multiple sets of second screw holes.

[0012] As a further improvement of this utility model: both the left and right ends of the upper surface of the extension plate are fixedly connected to external rods, and the upper ends of the external rods are fixedly connected to pull rods.

[0013] As a further improvement of this utility model, the mounting base and the fixing block, as well as the mounting block, are all fixedly connected by two sets of first fastening bolts.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. Due to the snap-fit ​​mechanism, the pre-snap connection ensures that the mounting blocks and fixing blocks of the two sets of PC components can be precisely aligned. This provides a precise positioning basis for subsequent screw fixing, which can avoid misalignment or unstable installation during formal fixing, and ensure the stability and firmness of the overall structure. Through the pre-snap connection, the installer no longer needs to manually adjust and align the position of the PC components, reducing the complexity of manual operation and improving installation efficiency. Even after the fastening bolts are loose or aged, they can still maintain a certain limiting effect. Multiple sets of return springs enhance the shock resistance of the connection part. Even under the condition of external vibration, the pre-snap connection can maintain the tight contact between the mounting block and the fixing block to prevent the components from loosening.

[0016] 2. Due to the fastening mechanism, the connection between the mounting base and the mounting block is more secure through the secondary fixing of two sets of first and second fastening bolts, preventing loosening or detachment caused by external vibration or load changes. The extension plate on the outer wall of the first return spring nut helps absorb external pressure and impact, reducing loosening or deformation caused by long-term use. If the nut ages, the operator can restore the fastening effect of the nut by rotating the external rod and pull rod, thereby extending the service life of the component and reducing the frequency of maintenance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a fastening device for precast PC components.

[0018] Figure 2 This is a schematic diagram of the mounting base and fixing block in a fastening device for precast PC components.

[0019] Figure 3 This is an enlarged structural schematic diagram of point A in a fastening device for precast PC components.

[0020] Figure 4 This is a schematic diagram of the structure of a fixing block and an installation block in a fastening device for precast PC components.

[0021] In the figure: 1. PC component body; 2. Mounting base; 3. Fixing block; 4. Mounting block; 5. Mounting cavity; 6. First return spring; 7. Extrusion plate; 8. Pad plate; 9. Second return spring; 10. Snap-fit ​​plate; 11. First fastening bolt; 12. Extension plate; 13. Second fastening bolt; 14. External rod; 15. Pull rod; 16. First screw hole; 17. Second screw hole; 18. Snap-fit ​​groove. Detailed Implementation

[0022] 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.

[0023] Example 1

[0024] Reference Figure 1-4 This embodiment provides a fastening device for precast PC components, including a PC component body 1, a mounting base 2, a fixing block 3, a mounting block 4, a mounting cavity 5, a first return spring 6, a compression plate 7, a pad 8, a second return spring 9, a snap-fit ​​plate 10, a first fastening bolt 11, an extension plate 12, a second fastening bolt 13, an external rod 14, a pull rod 15, a first screw hole 16, a second screw hole 17, and a snap-fit ​​groove 18. A pair of symmetrically arranged mounting bases 2 are fixedly connected to the outer wall of one end of the PC component body 1, and a pair of symmetrically arranged fixing blocks 3 are fixedly connected to the outer wall of the other end of the PC component body 1. A mounting block 4 is fixedly connected to the other end of each fixing block 3. The fixing blocks 3 and mounting blocks 4 are on the same horizontal line as their corresponding mounting bases 2. A snap-fit ​​mechanism and a fastening mechanism are provided between the fixing blocks 3 and mounting blocks 4 and the mounting bases 2.

[0025] Example 2

[0026] Reference Figure 1 , 23, 4, This embodiment is based on the previous embodiment, but differs from the previous embodiment in that each mounting base 2 has a mounting cavity 5, and two sets of first return springs 6 are fixedly connected to the top of each mounting cavity 5. Each set of first return springs 6 is fixedly connected to the bottom of each set of first return springs 6, and each set of extrusion plates 7 abuts against the corresponding fixing blocks 3. Each mounting cavity 5 has a pad plate 8 fixedly connected to the bottom of each mounting cavity 5, and two sets of second return springs 9 are fixedly connected to the top of each pad plate 8. Each set of second return springs 9 is fixedly connected to the top of each set of second return springs 9, and each mounting base 4 has a snap-fit ​​groove 18 at the bottom, and each snap-fit ​​groove 18 is movably snapped into the corresponding snap-fit ​​plate 10.

[0027] Two sets of PC component bodies 1 are placed horizontally side by side. The mounting block 4 and fixing block 3 of one set of PC component bodies 1 are inserted into the mounting cavity 5 of the mounting block 4 set at the upper end of the other set of PC component bodies 1.

[0028] Before insertion, the two sets of first return springs 6 and second return springs 9 need to be manually lifted so that the mounting block 4 is fully inserted into the mounting cavity 5. When the fixing block 3 moves to the designated position, the first return springs 6 and second return springs 9 are released so that they automatically reset. The two sets of first return springs 6 drive the pressing plate 7 to fully press against the upper surface of the fixing block 3 and continuously apply pressure. The two sets of second return springs 9 drive the snap-fit ​​plate 10 to snap into the snap-fit ​​groove 18 at the bottom of the fixing block 3, thus completing the pre-installation.

[0029] Example 3

[0030] Reference Figure 1 , 2 This embodiment is based on the previous embodiment, but differs from the previous embodiment in that the mounting base 2, the mounting cavity 5, and the upper end of the mounting block 4 are all provided with two sets of first screw holes 16. The multiple sets of first screw holes 16 are all threaded with first fastening bolts 11. The outer wall of the nut of the first fastening bolt 11 is fixedly connected with an extension plate 12. The extension plate 12 and the upper end face of the mounting base 2 are all provided with multiple sets of second screw holes 17. The multiple sets of second screw holes 17 are all threaded with second fastening bolts 13. The left and right ends of the upper end face of the extension plate 12 are fixedly connected with external rods 14. The upper end of the external rods 14 is fixedly connected with pull rods 15. The mounting base 2, the fixing block 3, and the mounting block 4 are all fixedly connected by two sets of first fastening bolts 11.

[0031] After pre-installation, the mounting base 2 and the mounting block 4 are on the same vertical horizontal line with multiple sets of first screw holes 16 at the upper end. First fastening bolts 11 are connected inside and outside the multiple sets of first screw holes 16 to fix the mounting base 2 and the mounting block 4 for a second time.

[0032] After the two sets of first fastening bolts 11 are fixed, the extension plate 12 on the outer wall of the first fastening bolt 11 will completely abut against the outer surface of the mounting base 2, and the second fastening bolt 13 will be connected between the mounting base 2 and the second screw hole 17 at the upper end of the extension plate 12 for fixing.

[0033] If the nut of the first return spring 6 is worn out, the operator can rotate the external rod 14 and the pull rod 15 to drive the extension plate 12 to rotate, thereby removing the first fastening bolt 11 from the first screw hole 16, and then disassembling.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A fastening device for precast PC components, comprising two sets of PC component bodies (1), a snap-fit ​​mechanism, and a fastening mechanism, characterized in that, The outer wall of one end of the PC component body (1) is fixedly connected to a pair of symmetrically arranged mounting seats (2), and the outer wall of the other end of the PC component body (1) is fixedly connected to a pair of symmetrically arranged fixing blocks (3). The other end of the fixing blocks (3) is fixedly connected to a mounting block (4). The fixing blocks (3) and the mounting blocks (4) are on the same horizontal line as the corresponding mounting seats (2). The fixing blocks (3) and the mounting blocks (4) are provided with a snap-fit ​​mechanism and a fastening mechanism between the mounting seats (2) and the mounting blocks (3).

2. The fastening device for PC precast components according to claim 1, characterized in that, The snap-fit ​​mechanism includes a squeezing plate (7) and a snap-fit ​​plate (10). The mounting base (2) is provided with a mounting cavity (5). The top of the mounting cavity (5) is fixedly connected to two sets of first return springs (6). The bottom of the two sets of first return springs (6) is fixedly connected to a squeezing plate (7). The squeezing plate (7) abuts against the corresponding fixing block (3).

3. A fastening device for PC precast components according to claim 2, characterized in that, The bottom of each mounting cavity (5) is fixedly connected to a pad (8), and the upper end of each pad (8) is fixedly connected to two sets of second reset springs (9). The upper end of each set of second reset springs (9) is fixedly connected to a snap-fit ​​plate (10). The lower side of each fixing block (3) is provided with a snap-fit ​​groove (18), and the snap-fit ​​groove (18) is movably snapped into the corresponding snap-fit ​​plate (10).

4. A fastening device for PC precast components according to claim 1, characterized in that, The fastening mechanism includes a first fastening bolt (11) and a second fastening bolt (13). The mounting base (2), the mounting cavity (5), and the upper end of the mounting block (4) are all provided with two sets of first screw holes (16). The first fastening bolts (11) are threadedly connected between the multiple sets of first screw holes (16).

5. A fastening device for PC precast components according to claim 4, characterized in that, The outer wall of the nut of the first fastening bolt (11) is fixedly connected with an extension plate (12). The extension plate (12) and the upper end face of the mounting base (2) are provided with multiple sets of second screw holes (17). The multiple sets of second screw holes (17) are threadedly connected with second fastening bolts (13).

6. A fastening device for PC precast components according to claim 5, characterized in that, The extension plate (12) has external rods (14) fixedly connected to both the left and right ends of its upper surface, and pull rods (15) are fixedly connected to the upper ends of the external rods (14).

7. A fastening device for PC precast components according to claim 6, characterized in that, The mounting base (2), the fixing block (3), and the mounting block (4) are all fixedly connected by two sets of first fastening bolts (11).

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