Prefabricated building embedded part positioning device
By designing a combined structure of limiting frame and movable parts, the problem of skew and displacement of embedded parts under concrete impact was solved, enabling rapid positioning and fixing of embedded parts and improving construction efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING CHUANHANG INTELLIGENT SYST CO LTD
- Filing Date
- 2025-05-23
- Publication Date
- 2026-04-24
AI Technical Summary
In existing prefabricated buildings, embedded parts are prone to tilting or shifting during concrete pouring, and the lack of an effective two-way positioning mechanism leads to construction difficulties and affects work efficiency.
A positioning device for prefabricated building embedded parts was designed. It adopts a limiting frame and movable parts, and achieves rapid positioning and fixing of embedded parts through the combination of clamping rods and fixing parts. The meshing structure of springs and fixing teeth ensures that the embedded parts do not shift under the impact of concrete.
It enables rapid positioning and fixing of embedded parts, improves construction efficiency, expands the applicability of the device, and adapts to the needs of embedded parts of different sizes.
Smart Images

Figure CN224161456U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of prefabricated buildings, specifically a positioning device for prefabricated building embedded parts. Background Technology
[0002] Prefabricated construction refers to the transfer of a large amount of on-site work from traditional construction methods to factories. Building components and accessories (such as floor slabs, wall panels, stairs, balconies, etc.) are prefabricated in factories, transported to the construction site, and assembled on-site using reliable connection methods. Prefabricated buildings mainly include precast concrete structures, steel structures, and modern wood structures. Because they employ standardized design, factory production, assembly-based construction, information management, and intelligent applications, they represent modern industrialized production methods.
[0003] Existing precast concrete structures all involve first laying a foundation and then pre-embedding anchor bolts in the foundation to enable rapid assembly of wall panels with the foundation. Similarly, connecting bolts are pre-embedded in the wall panels and beams to connect wall panels, floor slabs, and beams and columns on different floors.
[0004] Construction control lines are left outside the pre-embedded foundation pit for the construction of embedded parts. However, since the range of the construction control lines is larger than the construction range of the embedded parts, and due to the lack of a two-way positioning mechanism, the embedded parts are easily tilted or shifted by the impact force of the concrete during the concrete pouring process, causing their position to deviate from the target and affecting the later installation and use. Therefore, it is necessary to position the embedded parts, but the fixing process is cumbersome and affects work efficiency. Utility Model Content
[0005] The purpose of this utility model is to provide a positioning device for prefabricated building embedded parts to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a positioning device for prefabricated building embedded parts, including a limiting frame, on which eight movable parts are provided, the eight movable parts being divided into two groups, one group of movable parts having a clamping rod 1 on one side of the top, and the other group of movable parts having a clamping rod 2 on one side of the bottom.
[0007] The limiting frame includes a top limiting frame, and a bottom limiting frame is fixedly connected to the bottom of the top limiting frame. Four through slots are opened in the middle of the outer side of both the top limiting frame and the bottom limiting frame, and a fixing component is installed in each through slot.
[0008] Preferably, the top of the top limiting frame is provided with a scale line, the top of the inner wall of the bottom limiting frame is fixedly connected with a sleeve, the inner wall of the sleeve is slidably connected with an anti-detachment plate, and springs are provided at both the upper and lower ends of the anti-detachment plate.
[0009] Preferably, the top of the anti-detachment plate is fixedly connected to a connecting rod, the outer wall of the connecting rod is slidably connected to the sleeve, the top of the connecting rod is fixedly connected to a movable plate, the top of the movable plate is provided with limit teeth, and a pressing plate is fixedly connected to the middle of one side of the movable plate.
[0010] Preferably, the movable component includes a movable block, the side wall of the movable block is slidably connected to the top limiting frame and the bottom limiting frame, a sliding groove is provided in the middle of one side of the movable block, and a fixing tooth is provided at the top of the inner wall of the sliding groove.
[0011] Preferably, the fixing component includes a rotating shaft, the two ends of which are rotatably connected to through slots opened on the bottom limiting frame, a fixing plate is fixedly connected to one side of the rotating shaft, a fixing hole is opened in the middle of the fixing plate, and an extrusion block is fixedly connected to the other side of the rotating shaft.
[0012] Preferably, the length of the extrusion block is equal to the length of the extrusion plate. When the fixed plate is in a horizontal rotation state, the bottom surface of the extrusion plate on one side of the extrusion block is in contact with the extrusion plate, so that the limiting teeth and the fixed teeth mesh.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] This utility model proposes a prefabricated building embedded part positioning device, which optimizes the design of existing embedded part positioning devices. The movable part moves within the limiting frame, driving clamping rod one and clamping rod two to clamp and position the embedded part. A spring drives the movable plate up and down, allowing for pre-positioning of clamping rod one and clamping rod two. Once the position is determined, pulling the four fixing parts rotates the fixing plate to a horizontal position, causing the pressing block to press against the pressing plate, resulting in tight engagement between the limiting teeth and the fixing teeth, achieving rapid fixing. This device is compatible with embedded parts of different sizes while facilitating rapid fixing operations, thereby effectively improving the device's working efficiency and expanding its application range. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model;
[0016] Figure 2 This is a cross-sectional structural diagram of the present invention;
[0017] Figure 3 This is an enlarged structural diagram of point A in this utility model;
[0018] Figure 4 This is a schematic diagram of the structure of the movable part of this utility model;
[0019] Figure 5 This is a cross-sectional view of the limiting frame structure of this utility model.
[0020] In the diagram: 1. Limiting frame; 2. Movable part; 3. Clamping rod one; 4. Clamping rod two; 5. Fixing part; 11. Top limiting frame; 12. Bottom limiting frame; 13. Sleeve; 14. Anti-detachment plate; 15. Connecting rod; 16. Movable plate; 17. Limiting tooth; 18. Extrusion plate; 19. Scale line; 21. Movable block; 22. Sliding groove; 23. Fixing tooth; 51. Rotating shaft; 52. Fixing plate; 53. Extrusion block. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0022] Please see the appendix Figure 1-5 This application provides the following technical solutions.
[0023] A positioning device for prefabricated building embedded parts includes a limiting frame 1, on which eight movable parts 2 are arranged. The eight movable parts 2 are evenly divided into two groups. A clamping rod 3 is provided on the top side of one group of movable parts 2, and a clamping rod 4 is provided on the bottom side of the other group of movable parts 2. The limiting frame 1 includes a top limiting frame 11, and a bottom limiting frame 12 is fixedly connected to the bottom of the top limiting frame 11. Four through slots are opened in the middle of the outer side of both the top limiting frame 11 and the bottom limiting frame 12. Fixing parts 5 are provided in each of the through slots. A scale line 19 is provided on the top of the top limiting frame 11, and a sleeve 13 is fixedly connected to the top of the inner wall of the bottom limiting frame 12. The inner wall of the sleeve 13 is slidably connected to an anti-detachment plate 14. Springs are provided at both the upper and lower ends of the anti-detachment plate 14. A connecting rod 15 is fixedly connected to the top of the anti-detachment plate 14. The outer wall of the connecting rod 15 is slidably connected to the sleeve 13. A movable plate 16 is fixedly connected to the top of the connecting rod 15. A limiting tooth 17 is provided at the top of the movable plate 16. A pressing plate 18 is fixedly connected to the middle of one side of the movable plate 16. The movable part 2 includes a movable block 21. The side wall of the movable block 21 is slidably connected to the top limiting frame 11 and the bottom limiting frame 12. A sliding groove 22 is provided in the middle of one side of the movable block 21. A fixing tooth 23 is provided at the top of the inner wall of the sliding groove 22.
[0024] It should be noted that the operator places the device on the pre-embedded foundation pit, so that the limiting frame 1 is outside the construction control line left outside the foundation pit. The operator places the pre-embedded anchor bar downward to the pre-embedded position in the middle of the device. Then, the two clamping rods 1 3 and 2 clamping rods 4 are moved. The movable block 21 can pre-position the clamping rods 1 3 and 2 clamping rods 4 by engaging the fixed teeth 23 and the limiting teeth 17 on the inner wall of the sliding groove 22. By the extension and contraction of the spring, the anti-detachment plate 14 can move up and down in the sleeve 13. The fixed teeth 23 can cause the limiting teeth 17 to drive the movable plate 16 to move downward through the inclined surface at the bottom, so that the movable block 21 can slide along the inner wall formed between the top limiting frame 11 and the bottom limiting frame 12 until the clamping rods 1 3 and 2 clamping rods 4 are in contact with the anchor plate from four directions.
[0025] The fixing component 5 includes a rotating shaft 51. Both ends of the rotating shaft 51 are rotatably connected to the through slots opened on the bottom limiting frame 12. A fixing plate 52 is fixedly connected to one side of the rotating shaft 51. A fixing hole is opened in the middle of the fixing plate 52. An extrusion block 53 is fixedly connected to the other side of the rotating shaft 51. The length of the extrusion block 53 is equal to the length of the extrusion plate 18. When the fixing plate 52 is in a horizontal rotation state, the bottom surface of the extrusion plate 18 on one side of the extrusion block 53 is in contact with the extrusion block 17, so that the limiting tooth 17 and the fixing tooth 23 mesh.
[0026] It should be noted that when the operator rotates the four fixed plates 52, the rotating shaft 51 rotates in the through groove, the fixed plates 52 disengage from the through groove, the pressing block 53 contacts and presses the pressing plate 18, driving the movable plate 16 and the limiting tooth 17 to move upward until the fixed plate 52 is horizontal. At this time, one side of the pressing block 53 is in contact with the pressing plate 18, so that the limiting tooth 17 and the fixed tooth 23 are tightly engaged. The operator uses the fixing nail to pass through the fixing hole on the fixed plate 52 to fix it to the ground, thereby fixing the position of the clamping rod 1 3 and the clamping rod 2 4, and ensuring the positioning of the embedded part.
[0027] During use, the operator places the device on the pre-embedded foundation pit, ensuring that the limiting frame 1 is outside the construction control line left on the outside of the pit. The operator then places the pre-embedded anchor bar downwards to the pre-embedded position in the middle of the device. Subsequently, the two clamping rods 1 3 and 2 4 are moved. The movable block 21 can pre-position the clamping rods 1 3 and 2 4 by engaging the fixing teeth 23 and the limiting teeth 17 on the inner wall of the sliding groove 22. Through the extension and contraction of the spring, the anti-detachment plate 14 can move up and down within the sleeve 13. The fixing teeth 23, through the inclined surface at the bottom, can cause the limiting teeth 17 to drive the movable plate 16 downwards, allowing the movable block 21 to move along the top limiting frame 11 and the bottom limiting frame. The clamping rods slide within the inner wall formed between the 12 plates until the clamping rod 3 and clamping rod 4 are in contact with the anchor plate from four directions. At this time, the operator rotates the four fixed plates 52, causing the rotating shaft 51 to rotate in the through groove. The fixed plate 52 disengages from the through groove, and the pressing block 53 contacts and presses the pressing plate 18, driving the movable plate 16 and the limiting tooth 17 to move upward until the fixed plate 52 is horizontal. At this time, one side of the pressing block 53 is in contact with the pressing plate 18, so that the limiting tooth 17 and the fixed tooth 23 are tightly engaged. The operator uses the fixing nail to pass through the fixing hole on the fixed plate 52 and fix it to the ground to fix the position of the clamping rod 3 and clamping rod 4, ensuring the positioning of the embedded part.
[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A positioning device for prefabricated building embedded parts, including a limiting frame (1), eight movable parts (2) are provided on the limiting frame (1), the eight movable parts (2) are divided into two groups, a clamping rod one (3) is provided on the top side of one group of movable parts (2), and a clamping rod two (4) is provided on the bottom side of the other group of movable parts (2). Its features are: The limiting frame (1) includes a top limiting frame (11), and a bottom limiting frame (12) is fixedly connected to the bottom of the top limiting frame (11). Four through slots are opened in the middle of the outer side of both the top limiting frame (11) and the bottom limiting frame (12), and a fastener (5) is provided in each through slot.
2. The positioning device for prefabricated building embedded parts according to claim 1, characterized in that: The top of the top limiting frame (11) is provided with a scale line (19), and the top of the inner wall of the bottom limiting frame (12) is fixedly connected with a sleeve (13). The inner wall of the sleeve (13) is slidably connected with an anti-detachment plate (14), and springs are provided at both the upper and lower ends of the anti-detachment plate (14).
3. The positioning device for prefabricated building embedded parts according to claim 2, characterized in that: A connecting rod (15) is fixedly connected to the top of the anti-detachment plate (14). The outer wall of the connecting rod (15) is slidably connected to the sleeve (13). A movable plate (16) is fixedly connected to the top of the connecting rod (15). A limit tooth (17) is provided on the top of the movable plate (16). A pressing plate (18) is fixedly connected to the middle of one side of the movable plate (16).
4. The positioning device for prefabricated building embedded parts according to claim 1, characterized in that: The movable component (2) includes a movable block (21). The side wall of the movable block (21) is slidably connected to the top limiting frame (11) and the bottom limiting frame (12). A sliding groove (22) is provided in the middle of one side of the movable block (21), and a fixing tooth (23) is provided on the top of the inner wall of the sliding groove (22).
5. The positioning device for prefabricated building embedded parts according to claim 1, characterized in that: The fastener (5) includes a rotating shaft (51), the two ends of which are rotatably connected to the through slots opened on the bottom limiting frame (12). A fixing plate (52) is fixedly connected to one side of the rotating shaft (51), and a fixing hole is opened in the middle of the fixing plate (52). An extrusion block (53) is fixedly connected to the other side of the rotating shaft (51).
6. The positioning device for prefabricated building embedded parts according to claim 5, characterized in that: The length of the extrusion block (53) is equal to the length of the extrusion plate (18). When the fixed plate (52) is in a horizontal rotation state, the bottom surface of the extrusion plate (18) on one side of the extrusion block (53) is in contact with the bottom surface of the extrusion plate (18), so that the limiting tooth (17) meshes with the fixed tooth (23).