Connection for fabricated concrete elements

Abstract

The utility model discloses a connecting piece for fabricated concrete component belongs to building construction technical field, including two parallel opposite setting side plate, multiple sets of clamping piece, multiple adjusting lever groups, transmission cover and connecting rod mechanism, the opposite face of each group side plate is slid respectively and is provided with a pair of clamping piece, and multiple adjusting lever groups are rotationally arranged between two side plates, and transmission cover is sleeved on adjusting lever group and can rotate with it, and transmission cover can slide along the axial direction of adjusting lever group. The connecting piece for fabricated concrete component, can actively adapt and compensate the change of actual clearance between wallboards caused by component tolerance and accumulated error, ensure that wallboard can be closely, reliably butted in the end.

Description

Technical Field

[0001] This utility model belongs to the field of building construction technology, and in particular relates to connectors for prefabricated concrete components. Background Technology

[0002] With the rapid development of industrialized construction, prefabricated concrete structures are widely used due to their advantages such as high construction efficiency and minimal environmental impact. In prefabricated buildings, components such as precast concrete wall panels need to be quickly and reliably connected on-site. One common dry connection method involves pre-setting grooves at the ends of the components and locking them with metal connectors. This method enables rapid installation, but its connection effectiveness largely depends on the precision of component manufacturing and on-site installation.

[0003] However, existing connectors of this type typically employ a rigid locking principle, with their design logic based on ideal component dimensions and installation environment. In actual construction, prefabricated components have dimensional tolerances within acceptable limits. Furthermore, when splicing multiple wall panels across an entire wall, errors accumulate. This leads to a potential discrepancy between the actual gap and the designed gap between the two ultimately joined wall panels. If the connector is a purely rigid structure with no adjustment margin, two unfavorable situations arise: when the actual gap is larger than the expected gap, gaps will appear after the wall is joined, causing the connection to loosen; when the actual gap is smaller than the expected gap, the connector may not be installed correctly or may exert excessive assembly stress on the wall panel, affecting structural safety. Therefore, there is an urgent need for a connector that allows for fine-tuning of the relative positions between wall panels after initial positioning, to compensate for errors in design, manufacturing, and construction, ensuring connection reliability and installation quality.

[0004] Therefore, we propose a connector for prefabricated concrete components to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to solve the problem that existing connectors are purely rigid structures with no adjustment margin, and cannot compensate for errors generated in design, manufacturing and construction. The invention proposes a connector for prefabricated concrete components.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Connectors for prefabricated concrete components, including:

[0008] Two parallel and oppositely arranged side panels;

[0009] Each pair of side panels is slidably provided on the facing surfaces, and the snap-fit ​​pieces are used to be embedded in the corresponding slots provided on the end face of the prefabricated wall panel.

[0010] Multiple adjusting rods are rotatably disposed between the two side plates. Each adjusting rod assembly includes a first rod segment and a second rod segment that can rotate relative to each other. The first rod segment is rotatably connected to one side plate, and the second rod segment is rotatably connected to the other side plate. The first rod segment and the second rod segment are connected by a threaded connection. Rotating the adjusting rod assembly can drive the two side plates to move closer to or further away from each other.

[0011] A transmission sleeve is fitted onto the adjusting rod assembly and can rotate with it, and the transmission sleeve can slide along the axial direction of the adjusting rod assembly;

[0012] A linkage mechanism is connected between the transmission sleeve and each of the snap-fit ​​members. The linkage mechanism is configured such that when the transmission sleeve rotates, it can drive the two snap-fit ​​members on the same side plate to slide towards or away from each other.

[0013] Preferably, the linkage mechanism includes:

[0014] The first threaded portion and the second threaded portion are provided on the transmission sleeve, and the helical directions of the first threaded portion and the second threaded portion are opposite.

[0015] The first control ring and the second control ring are respectively threaded into the first threaded portion and the second threaded portion;

[0016] A linkage assembly, comprising links respectively connected between the first control ring, the second control ring and the corresponding snap-fit ​​member.

[0017] Preferably, the locking member is a locking rod, the side of the locking rod is provided with a guide block, and the side plate is provided with a sliding groove adapted to the guide block, and the guide block is slidably disposed in the sliding groove.

[0018] Preferably, the number of adjusting rod groups is multiple, and they are evenly distributed along the central area of ​​the two side plates.

[0019] Preferably, the mating section between the transmission sleeve and the adjusting rod assembly is non-circular, so that the transmission sleeve can rotate with the adjusting rod assembly and slide along its axial direction.

[0020] Preferably, the first rod segment is an external threaded rod with internal threads, and the second rod segment is an internal threaded rod with external threads.

[0021] In summary, the technical effects and advantages of this utility model are as follows: This connector for prefabricated concrete components, through the design of an adjusting rod group, a transmission sleeve, and a linkage mechanism, divides the connection process into two stages: First, by rotating the adjusting rod group, the two side plates are driven to move closer to each other, causing the snap-fit ​​parts to embed into the wall panel slots, completing the initial positioning of the wall panel. Subsequently, after the adjusting rod group is tightened to its limit, it continues to rotate. At this time, the entire adjusting rod group will drive the transmission sleeve to rotate synchronously, and through the linkage mechanism, drive the two snap-fit ​​parts on the same side plate to move towards each other, thereby applying a lateral tension force to the wall panel, realizing the adjustment of the tightness of the wall panel connection. This allows the utility model to actively adapt to and compensate for changes in the actual gap between wall panels caused by component tolerances and cumulative errors, ensuring that the wall panels can ultimately be tightly and reliably connected.

[0022] This invention does not require the extremely high initial installation precision required by rigid connectors. Even if there are small gaps or interference between the wall panels after initial positioning, they can be eliminated through subsequent fine-tuning operations. This provides a "buffered and adjustable" space for the entire connection node, effectively avoiding stress concentration or damage to components caused by forced installation, and improving the safety and fault tolerance of the connection.

[0023] This invention can adapt to wall panels of different thicknesses by adjusting the rod assembly. Its working principle does not rely on fixed absolute dimensions, but on relative adjustment, thus having a wider range of applicability. At the same time, the entire adjustment process can be completed by operating the adjusting rod assembly with simple tools such as wrenches, without the need for additional procedures or complex equipment. The installation process is simple and highly reliable. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the adjusting rod assembly and connecting rod mechanism in this utility model;

[0026] Figure 3 This is an exploded view of the adjusting rod assembly in this utility model;

[0027] Figure 4 This is a cross-sectional structural diagram of the present invention;

[0028] Figure 5 This is a schematic diagram of the side plate in this utility model.

[0029] In the diagram: 1. Side plate; 11. Slide groove; 2. Snap-fit ​​component; 21. Guide block; 3. Adjusting rod assembly; 31. First rod segment; 32. Second rod segment; 4. Transmission sleeve; 5. Linkage mechanism; 51. First threaded part; 52. Second threaded part; 53. First control ring; 54. Second control ring; 55. Connecting rod; 100. Prefabricated wall panel; 101. Slot. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0031] Reference Figure 1-5 A connector for prefabricated concrete components, comprising two parallel and opposite side plates 1, multiple sets of snap-fit ​​parts 2, multiple sets of adjusting rods 3, a transmission sleeve 4, and a linkage mechanism 5.

[0032] The two side plates 1 serve as the main support frame of the entire connector and are made of high-strength steel plates to withstand various stresses generated during the connection process. On the opposing surfaces of each side plate 1, i.e., the surfaces where the two side plates 1 face each other, a pair of snap-fit ​​pieces 2 are slidably arranged. Specifically, the snap-fit ​​piece 2 adopts a locking rod, and a guide block 21 is fixedly installed on its side. A groove 11 matching the shape of the guide block 21 is machined on the side plate 1. The guide block 21 is embedded in the groove 11, so that the snap-fit ​​piece 2 can slide smoothly along the length direction of the groove 11, i.e., perpendicular to the axis of the adjusting rod group 3, without coming off the side plate 1. The locking rod can be embedded in the pre-set slot 101 on the end face of the prefabricated wall panel 100, thereby realizing the initial connection between the connector and the prefabricated wall panel 100.

[0033] Reference Figure 1-5To drive the two side plates 1 to move relative to each other and complete the initial connection, multiple adjusting rod groups 3 are rotatably arranged between the two side plates 1. These adjusting rod groups 3 are preferably evenly distributed along the central area of ​​the two side plates 1 to ensure that the side plates 1 are subjected to balanced force and to avoid skewing during the tightening process. Each adjusting rod group 3 includes a first rod segment 31 and a second rod segment 32 that can rotate relative to each other. The first rod segment 31 is an external threaded rod with an internal threaded hole, and the second rod segment 32 is an internal threaded rod screwed into the internal threaded hole. The end of the first rod segment 31 is rotatably connected to one side plate 1; the end of the second rod segment 32 is also rotatably connected to the other side plate 1. The adjustment rods can be rotated using tools such as wrenches. The adjusting rod assembly 3, utilizing the threaded engagement between the inner and outer screws, can effectively drive the two side plates 1 closer to or further apart. When installation is required, the operator places the connector in the gap between the two assembled wall panels 100 to be joined, aligning each snap-fit ​​2 with the slot 101 on the end face of the assembled wall panel 100. Then, the operator rotates the adjusting rod assembly 3, using one wrench to limit the first rod section 31 and another wrench to screw the second rod section 32 inward, causing the two side plates 1 to move towards each other until all snap-fit ​​2 are reliably engaged in the corresponding slot 101. The side plates 1 then laterally clamp the assembled wall panel 100, completing the initial positioning of the assembled wall panel 100.

[0034] Reference Figure 2-4 After initial positioning, the tightness of the connection of the prefabricated wall panel 100 is adjusted to compensate for construction errors. This is achieved through the synergistic action of the transmission sleeve 4 and the linkage mechanism 5. The transmission sleeve 4 is slidably sleeved on the first rod segment 31 in the adjusting rod group 3. To ensure effective power transmission, the mating section between the transmission sleeve 4 and the outer screw is designed to be non-circular, such as quadrilateral, hexagonal or keyway mating structure, so that the transmission sleeve 4 can rotate with the first rod segment 31 and slide freely along the axial direction on the first rod segment 31.

[0035] The linkage mechanism 5 converts the rotational motion of the transmission sleeve 4 into the lateral sliding motion of the snap-fit ​​2. The linkage mechanism 5 includes a first threaded portion 51, a second threaded portion 52, a first control ring 53, a second control ring 54, and a linkage group. Specifically, the first threaded portion 51 and the second threaded portion 52 are machined on the outer wall of the transmission sleeve 4. The spiral directions of the two are opposite. The first control ring 53 and the second control ring 54 are threadedly engaged on these two threaded portions, respectively. The linkage group includes multiple connecting rods 55. The two ends of these connecting rods 55 are movably connected to the first control ring 53, the second control ring 54, and the corresponding snap-fit ​​2 through pins, forming a kinematic chain.

[0036] After the prefabricated wall panels 100 are initially joined, if a small gap is found between the prefabricated wall panels 100 due to design or construction errors, and the tension needs to be adjusted, the operator can continue to rotate the adjusting rod group 3. After initial positioning, the inner and outer screws have been screwed to near their limit positions. At this time, continue to apply torque, and the entire adjusting rod group 3 will start to rotate synchronously as a whole. Since the transmission sleeve 4 is linked with the outer screw through a non-circular cross section, it will rotate together. The rotation of the transmission sleeve 4 drives the first control ring 53 and the second control ring 54, which are threaded together, to move closer to each other because their threads are in opposite directions. The movement of the first control ring 53 and the second control ring 54 is transmitted through the connecting rod 55 and converted into a pulling force on the two snap-fit ​​pieces 2 on the same side plate 1. This forces the two snap-fit ​​pieces 2 to slide towards each other along the sliding groove 11 on the side plate 1, and to lock onto the side wall of the wall panel slot 101 from the inside, generating a lateral tension force, thereby pulling the two prefabricated wall panels 100 together more tightly and eliminating the installation gap.

[0037] The working process of this utility model is as follows:

[0038] First, preliminary positioning and lateral clamping are performed. The operator places the connector at the joint between the two prefabricated wall panels 100 to be joined. During placement, it is necessary to ensure that the two snap-fit ​​pieces 2 on each side panel 1 are accurately aligned with the pre-cut slots 101 on the end face of the corresponding prefabricated wall panel 100. Then, the adjusting rod assembly 3 is rotated using a tool. Specifically, one wrench can be used to restrict the rotation of the first rod segment 31, while another wrench is used to rotate the second rod segment 32, causing it to screw into the internal threaded hole of the first rod segment 31. Through this operation, the effective length of the adjusting rod assembly 3 is shortened, thereby driving the two side panels 1 to move closer to each other. The movement of the side panels 1 causes the snap-fit ​​pieces 2 on them to be simultaneously embedded into the slots 101 of the wall panels until the snap-fit ​​pieces 2 are fully in place, realizing the reliable connection between the connector and the prefabricated wall panel 100, and completing the preliminary lateral clamping of the two prefabricated wall panels 100.

[0039] Next, fine-tuning of the connection tightness is performed. After initial positioning, if there are still minor gaps between the prefabricated wall panels 100 due to component tolerances or cumulative installation errors, or if the tension needs to be adjusted, the operator continues to use a wrench to rotate the adjusting rod assembly 3. At this time, since the first rod segment 31 and the second rod segment 32 have been screwed to near their limit positions, they no longer rotate relative to each other, but rotate synchronously as a whole. Since the transmission sleeve 4 is linked to the first rod segment 31 through its non-circular inner hole, the transmission sleeve 4 also rotates together. The rotation of the transmission sleeve 4 drives its outer wall. The first control ring 53 and the second control ring 54 on the first threaded part 51 and the second threaded part 52 with opposite spiral directions approach each other along the axial direction of the transmission sleeve 4. Through the connecting rod 55 connected to them, the motion is transmitted to the two snap-fit ​​pieces 2 on the same side plate 1 and converted into a pulling force that drives them to slide towards each other along the slide groove 11 of the side plate 1. Finally, the snap-fit ​​pieces 2 tightly fasten to the side wall of the wall panel slot 101 from the inside, generating a lateral tension force, thereby pulling the two assembled wall panels 100 together more tightly, completely eliminating the installation gap, and completing the final fastening.

Claims

1. A connector for prefabricated concrete components, characterized in that, The system includes two parallel, oppositely arranged side plates (1); each side plate (1) has a pair of snap-fit ​​pieces (2) slidably arranged on its facing surfaces, the snap-fit ​​pieces (2) being used to embed into corresponding slots (101) on the end faces of the prefabricated wall panel (100); multiple adjusting rod groups (3) are rotatably arranged between the two side plates (1), the adjusting rod groups (3) including a first rod segment (31) and a second rod segment (32) capable of relative rotation, the first rod segment (31) being rotatably connected to one side plate (1), and the second rod segment (32) being rotatably connected to the other side plate (1), and... The first rod segment (31) and the second rod segment (32) are connected by a threaded connection. By rotating the adjusting rod group (3), the two side plates (1) can be driven to move closer or further apart. The adjusting rod group (3) is fitted with a transmission sleeve (4) that rotates with it, and the transmission sleeve (4) can slide along the axial direction of the adjusting rod group (3). The transmission sleeve (4) is connected to each snap-fit ​​part (2) by a linkage mechanism (5). The linkage mechanism (5) is configured such that when the transmission sleeve (4) rotates, it can drive the two snap-fit ​​parts (2) on the same side plate (1) to slide towards or away from each other.

2. The connector for prefabricated concrete components according to claim 1, characterized in that, The linkage mechanism (5) includes: The first threaded portion (51) and the second threaded portion (52) are provided on the transmission sleeve (4), and the helical directions of the first threaded portion (51) and the second threaded portion (52) are opposite. The first control ring (53) and the second control ring (54) are threadedly engaged with the first threaded part (51) and the second threaded part (52), respectively. The linkage assembly includes a link (55) that is connected between the first control ring (53), the second control ring (54) and the corresponding snap-fit ​​member (2).

3. The connector for prefabricated concrete components according to claim 1, characterized in that, The snap-fit ​​component (2) is a snap-fit ​​rod, and a guide block (21) is provided on the side of the snap-fit ​​rod. A sliding groove (11) adapted to the guide block (21) is provided on the side plate (1), and the guide block (21) is slidably disposed in the sliding groove (11).

4. The connector for prefabricated concrete components according to claim 1, characterized in that, The number of adjustment rod groups (3) is multiple, and they are evenly distributed along the central area of ​​the two side plates (1).

5. The connector for prefabricated concrete components according to claim 1, characterized in that, The cross section of the transmission sleeve (4) and the adjusting rod group (3) is non-circular, so that the transmission sleeve (4) can rotate with the adjusting rod group (3) and slide along its axial direction.

6. The connector for prefabricated concrete components according to claim 1, characterized in that, The first rod segment (31) is an external threaded rod with internal threads, and the second rod segment (32) is an internal threaded rod with external threads.

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