A device for positioning and controlling the lap length of main reinforcement bars in a steel cage

Abstract

This utility model belongs to the field of building construction, specifically relating to a device for positioning and controlling the lap length of main reinforcement bars in a steel cage. It includes a support frame, a distance adjustment shaft, at least two positioning rings, a locking device, a clamp, a diameter adjustment rod, and a main reinforcement bar clamping sleeve. One end of the distance adjustment shaft is mounted on the upper end of the support frame, and the other end extends horizontally. Each positioning ring includes a coaxial inner ring and an outer ring. The inner ring is fitted onto the distance adjustment shaft and can move axially along it, and is fixed to it by the locking device. The clamp is mounted on the outer ring and has a first locking structure for locking one end of the diameter adjustment rod, the other end of which extends radially outward towards the positioning ring, and the extended end has a main reinforcement bar clamping sleeve. By changing the connection position between the rod and the first locking structure, the position of the diameter adjustment rod radially in the positioning ring can be adjusted. This utility model achieves standardization, modularization, and efficiency in steel reinforcement layout, providing a reliable auxiliary tool for on-site steel cage fabrication.

Description

Technical Field

[0001] This utility model belongs to the field of building construction, and specifically relates to a device for positioning and controlling the lap length of the main reinforcement bars of a steel cage. Background Technology

[0002] In building construction and infrastructure development, the reinforcing cage is a crucial component in pile foundation construction, and its structural quality directly determines the load-bearing capacity, durability, and overall structural safety of the pile foundation. The reinforcing cage typically consists of main bars, stirrups, and necessary connecting bars. The distribution, spacing uniformity, and lap length of the main bars must strictly comply with design specifications and construction standards to ensure effective load transfer and overall structural rigidity.

[0003] Currently, the fabrication of rebar cages on construction sites still largely relies on traditional manual methods, depending on construction workers for tasks such as reinforcement placement, positioning, and splicing. This method has the following main limitations: 1. Difficulty in ensuring uniformity of main reinforcement distribution: Due to reliance on manual visual positioning, the distribution of main reinforcement in the circumference and axial direction of the steel cage is often uneven, resulting in uneven stress distribution, which easily leads to stress concentration and affects the bearing capacity and long-term safety of the pile foundation.

[0004] 2. Inaccurate control of lap length: Insufficient lap length significantly weakens the joint strength and affects the overall structural integrity; while excessive lap length leads to material waste and increased costs. Currently, there is a lack of effective means to monitor and control lap dimensions in real time, relying mainly on workers' experience, which results in large errors and makes it difficult to achieve uniform quality management.

[0005] 3. Low construction efficiency: Repeated measurement, adjustment and fixing operations are not only labor-intensive, but also seriously affect the construction progress, making it difficult to meet the needs of modern large-scale and fast-paced construction.

[0006] Traditional manual fabrication methods can no longer meet the current engineering requirements for precision, efficiency, and reliability. Therefore, there is an urgent need to develop a structurally sound, easy-to-operate, and accurately positioned main reinforcement bar positioning and lap length control device to solve the above problems. Utility Model Content

[0007] This utility model addresses the technical problems existing in the prior art by providing a device for positioning and controlling the lap length of the main reinforcement bars in a steel cage. This device achieves standardization, modularization, and efficiency in steel reinforcement layout, providing a reliable auxiliary tool for on-site steel cage fabrication.

[0008] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A device for positioning and controlling the lap length of main reinforcement bars in a steel cage, comprising, support; The distance adjustment shaft has one end rotatably mounted on the upper end of the bracket, and the other end extends horizontally and is parallel to the ground. At least two positioning rings, each positioning ring including an inner ring and an outer ring arranged coaxially, and a connector connecting the inner ring and the outer ring; the positioning ring is sleeved on the distance adjustment shaft through its inner ring and can move along the axial direction of the distance adjustment shaft; A locking device is used to lock and fix the moved positioning ring onto the distance adjustment shaft; A clamp is fixedly installed on the outer ring of the positioning ring, and the clamp is provided with a first locking structure; A diameter adjusting rod, one end of which is connected to the first locking structure, and the other end extends radially outward toward the positioning ring; by changing the connection position between the rod and the first locking structure, the position of the diameter adjusting rod in the radial direction of the positioning ring can be adjusted. A main reinforcement clamping sleeve is provided at the extension end of the diameter adjusting rod, and its axis is parallel to the distance adjusting axis. The main reinforcement clamping sleeve is provided with a second locking structure for clamping the main reinforcement.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, the first locking structure includes a mounting sleeve disposed on the clamp, the axial direction of the mounting sleeve being consistent with the radial direction of the positioning ring, and the rod body of the diameter adjusting rod passing through the mounting sleeve.

[0011] Furthermore, the first locking structure also includes a first locking hole disposed on the mounting sleeve and a first locking member that cooperates with the first locking hole.

[0012] Furthermore, the first locking hole is a threaded hole, the first locking element is a bolt, and there are multiple threaded holes, which are spaced apart along the axial direction of the mounting sleeve.

[0013] Furthermore, the clamp includes a first clamping plate and a second clamping plate, as well as fasteners connecting the first clamping plate and the second clamping plate, wherein the first clamping plate is provided with the first locking structure.

[0014] Furthermore, the first clamping plate and the second clamping plate are respectively provided with a plurality of mounting holes, and the fasteners are inserted into the mounting holes to lock and fix the first clamping plate and the second clamping plate.

[0015] Furthermore, the second locking structure includes a second locking hole disposed on the main rib clamping sleeve and a second locking member that cooperates with the second locking hole.

[0016] Furthermore, the connector is a connecting rod.

[0017] The beneficial effects of this utility model are: 1. In this embodiment, by adjusting the distance between the two positioning rings, the end positions of the two main reinforcing bars to be lapped can be precisely defined, thereby achieving precise control over their lap length. By increasing or decreasing the number of positioning rings, multiple sets of main reinforcing bars can be positioned simultaneously on the same device to adapt to design requirements with different lap ratios.

[0018] 2. In this embodiment, the main reinforcement clamping sleeve and clamps are arranged in a standardized manner on the positioning ring, which can accurately define the position of the main reinforcement in the circumferential direction of the steel cage, so that the main reinforcement is evenly arranged, improves the overall symmetry and stress performance of the cage, and helps to ensure the uniformity of force transmission during pile foundation construction.

[0019] 3. The diameter adjustment rod adopted in this embodiment can adapt to the fabrication requirements of steel cages with different diameter specifications, realize stepless adjustment, improve the versatility and reusability of the device, and reduce construction costs.

[0020] 4. This implementation uses a double-bolt structure on the main reinforcement clamping sleeve, with the front end for clamping and the rear end for limiting, which can ensure the consistency of the longitudinal position of all main reinforcement ends, ensure that the lap area is neat and uniform, facilitate subsequent welding or binding operations, and improve construction efficiency.

[0021] 5. This implementation system features a compact structure, high modularity, and convenient installation and disassembly. It is suitable for rapid deployment in various construction methods, such as rebar cage welding or on-site manual tying, thereby improving the flexibility of construction organization. Furthermore, this system has good structural compatibility and can be flexibly used in conjunction with various types of rebar cage welding equipment commonly used on-site to enhance the standardization and efficiency of rebar cage fabrication. Attached Figure Description

[0022] Figure 1 This is a perspective view of the main reinforcement positioning and lap length control device for the steel cage described in this embodiment; Figure 2 This is a front view of the main reinforcement positioning and lap length control device for the steel cage described in this embodiment; Figure 3 This is a side view of the main reinforcement positioning and lap length control device for the steel cage described in this embodiment; Figure 4 This is a schematic diagram of the distance adjustment shaft mounted on the bracket as described in this embodiment; Figure 5 This is a schematic diagram of the positioning ring described in this embodiment; Figure 6 This is a schematic diagram of the fixture being mounted on the positioning ring as described in this embodiment; Figure 7This is a schematic diagram of the diameter adjusting rod passing through the mounting sleeve as described in this embodiment.

[0023] The attached diagram lists the components represented by each number as follows: 1. Bracket, 2. Distance adjustment shaft 3. Positioning ring; 31. Inner ring; 32. Outer ring; 33. Connecting rod. 4. Fixture; 41. First clamping plate; 42. Second clamping plate; 43. Fastener; 44. Mounting sleeve; 45. First locking hole; 46. First locking element. 5. Diameter adjustment rod, 6. Main rib clamping sleeve; 61. Second locking hole; 62. Second locking component. 7. Main reinforcement bars, 8. Drum device. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0026] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0027] Example A device for positioning and controlling the lap length of main reinforcement bars in a steel cage, such as Figure 1-7 As shown, including, Bracket 1; The distance adjustment shaft 2 has one end rotatably mounted on the upper end of the bracket 1, and the other end extends horizontally and is parallel to the ground. At least two positioning rings 3, each positioning ring 3 including an inner ring 31 and an outer ring 32 arranged coaxially, and a connector connecting the inner ring 31 and the outer ring 32; the positioning ring 3 is sleeved on the distance adjustment shaft 2 through its inner ring 31, and can move along the axial direction of the distance adjustment shaft 2; A locking device is used to lock and fix the moved positioning ring 3 onto the distance adjustment shaft 2; The clamp 4 is fixedly installed on the outer ring 32 of the positioning ring 3, and the clamp 4 is provided with a first locking structure; A diameter adjusting rod 5, one end of which is connected to the first locking structure, and the other end extends radially outward toward the positioning ring 3; by changing the connection position between the rod and the first locking structure, the position of the diameter adjusting rod 5 in the radial direction of the positioning ring 3 can be adjusted. A main reinforcement clamping sleeve 6 is located at the extension end of the diameter adjusting rod 5, and its axis is parallel to the distance adjusting shaft 2. The main reinforcement clamping sleeve 6 is provided with a second locking structure for clamping the main reinforcement 7.

[0028] The second locking structure includes a second locking hole 61 disposed on the main rib clamping sleeve 6 and a second locking member 62 that cooperates with the second locking hole 61.

[0029] Specifically, the connector is a connecting rod 33.

[0030] In this embodiment, as Figure 4 As shown, the distance adjustment shaft 2 is a smooth round steel or galvanized steel pipe with a length greater than the maximum designed overlap length. The distance adjustment shaft 2 runs through the entire device, used to install multiple positioning rings 3, and serves as the reference axis for adjusting the spacing between the positioning rings 3. The inner ring 31 of the positioning ring 3 is fitted onto the distance adjustment shaft 2 and can move axially along the distance adjustment shaft 2, and is fixed in a set position by a locking device. The surface of the distance adjustment shaft 2 has length graduations (not shown in the figure) to assist in quickly and accurately setting the spacing between the positioning rings 3. The locking device can be a bolt, which passes through a threaded hole on the inner ring 31, and its end presses against the distance adjustment shaft 2 to fix the positioning rings 3.

[0031] like Figure 5As shown, the positioning ring 3 is used to control the distribution position of the main reinforcement bars 7 in the circumferential direction of the steel cage. Multiple clamps 4 are provided on the ring body. The number of positioning rings 3 is generally selected according to the design lap ratio, usually two. In this embodiment, two are used. By adjusting the distance between the two positioning rings 3 on the distance adjustment axis 2, precise control of the lap length of the main reinforcement bars 7 can be achieved. Simultaneously, by increasing or decreasing the number of positioning rings 3, different lap ratio design requirements can be accommodated. Multiple clamps 4 are installed on the outer ring 32 of the positioning ring 3 and are evenly distributed. Their specific installation positions are adjustable, and their number can be configured according to the number of main reinforcement bars 7 to ensure the uniformity of the circumferential distribution of the main reinforcement bars 7. The clamps 4 are provided with a first locking structure. By changing the connection position between the diameter adjustment rod 5 and the locking structure, the radial position of the diameter adjustment rod 5 on the positioning ring 3 can be adjusted to adapt to the fabrication requirements of steel cages with different diameter specifications.

[0032] like Figure 6 As shown, the main reinforcement clamping sleeve 6 is installed at the extension end of the diameter adjusting rod 5 and is used for axial positioning and end fixing of the main reinforcement 7. The main reinforcement clamping sleeve 6 is provided with a second locking structure, wherein the second locking hole 61 is a threaded hole and the second locking element 62 is a bolt. The main reinforcement clamping sleeve 6 is provided with two threaded holes and two bolts, wherein the front bolt is used to clamp and fix the main reinforcement 7, and the rear bolt is used to limit the length of the main reinforcement 7, thereby ensuring that the ends of all main reinforcements 7 are in the same longitudinal position and meeting the requirement of consistent lap length.

[0033] like Figure 1 and Figure 3 As shown, the bracket 1 is located at the rear end of the entire device to support the distance adjustment shaft 2. One end of the distance adjustment shaft 2 is mounted on the upper end of the bracket 1 through a bearing, so that the distance adjustment shaft 2 can rotate relative to the bracket 1. The front end of the device is supported by steel bars on the roller device 8 of the steel cage or the working platform to ensure overall stability and processing docking accuracy.

[0034] In a preferred embodiment, the first locking structure includes a mounting sleeve 44 disposed on the clamp 4, the axial direction of the mounting sleeve 44 being consistent with the radial direction of the positioning ring 3, and the rod of the diameter adjusting rod 5 passing through the mounting sleeve 44.

[0035] The first locking structure further includes a first locking hole 45 disposed on the mounting sleeve 44 and a first locking member 46 that cooperates with the first locking hole 45.

[0036] The first locking hole 45 is a threaded hole, the first locking element 46 is a bolt, and there are multiple threaded holes, which are spaced apart along the axial direction of the mounting sleeve 44.

[0037] In a preferred embodiment, the clamp 4 includes a first clamping plate 41 and a second clamping plate 42, and a fastener 43 connecting the first clamping plate 41 and the second clamping plate 42, wherein the first clamping plate 41 is provided with the first locking structure.

[0038] Furthermore, the first clamping plate 41 and the second clamping plate 42 are respectively provided with a plurality of mounting holes, and the fastener 43 is inserted into the mounting holes to lock and fix the first clamping plate 41 and the second clamping plate 42.

[0039] In this embodiment, as Figure 7 As shown, the mounting sleeve 44 is fixed on the first clamping plate 41. The diameter adjusting rod 5 passes through the mounting sleeve 44, can slide relative to it, and is fixed by bolts on the mounting sleeve 44, realizing stepless adjustment of the diameter of the reinforcing cage. Multiple diameter adjusting rods 5 are evenly distributed along the circumference of the reinforcing cage and are respectively set on the two positioning rings 3 to form the basic skeleton of the cage.

[0040] While embodiments or examples of this disclosure have been described with reference to the accompanying drawings, it should be understood that the methods, systems, and devices described above are merely exemplary embodiments or examples, and the scope of this utility model is not limited by these embodiments or examples, but only by the granted claims and their equivalents. Various elements in the embodiments or examples may be omitted or replaced by their equivalents. Furthermore, the steps may be performed in a different order than that described in this disclosure. Further, various elements in the embodiments or examples may be combined in various ways. Importantly, as technology evolves, many elements described herein can be replaced by equivalents that appear after this disclosure.

Claims

1. A device for positioning and controlling the lap length of main reinforcing bars in a steel cage, characterized in that, include, support; The distance adjustment shaft has one end rotatably mounted on the upper end of the bracket, and the other end extends horizontally and is parallel to the ground. At least two positioning rings, each positioning ring including an inner ring and an outer ring arranged coaxially, and a connector connecting the inner ring and the outer ring; the positioning ring is sleeved on the distance adjustment shaft through its inner ring and can move along the axial direction of the distance adjustment shaft; A locking device is used to lock and fix the moved positioning ring onto the distance adjustment shaft; A clamp is fixedly installed on the outer ring of the positioning ring, and the clamp is provided with a first locking structure; A diameter adjusting rod, one end of which is connected to the first locking structure, and the other end extends radially outward toward the positioning ring; by changing the connection position between the rod and the first locking structure, the position of the diameter adjusting rod in the radial direction of the positioning ring can be adjusted. A main reinforcement clamping sleeve is provided at the extension end of the diameter adjusting rod, and its axis is parallel to the distance adjusting axis. The main reinforcement clamping sleeve is provided with a second locking structure for clamping the main reinforcement.

2. The device for positioning and lap length control of the main reinforcement bars of the steel cage according to claim 1, characterized in that, The first locking structure includes a mounting sleeve disposed on the clamp, the axial direction of the mounting sleeve being consistent with the radial direction of the positioning ring, and the rod body of the diameter adjusting rod passing through the mounting sleeve.

3. The device for positioning and lap length control of the main reinforcement bars of the steel cage according to claim 2, characterized in that, The first locking structure further includes a first locking hole disposed on the mounting sleeve and a first locking element that cooperates with the first locking hole.

4. The device for positioning and lap length control of the main reinforcement bars of the steel cage according to claim 3, characterized in that, The first locking hole is a threaded hole, the first locking element is a bolt, and there are multiple threaded holes, which are spaced apart along the axial direction of the mounting sleeve.

5. The device for positioning and lap length control of the main reinforcement bars of the steel cage according to claim 1, characterized in that, The clamp includes a first clamping plate and a second clamping plate, as well as fasteners connecting the first clamping plate and the second clamping plate, wherein the first clamping plate is provided with the first locking structure.

6. The device for positioning and lap length control of the main reinforcement bars of the steel cage according to claim 5, characterized in that, The first clamping plate and the second clamping plate are provided with a plurality of mounting holes, and the fasteners are inserted into the mounting holes to lock and fix the first clamping plate and the second clamping plate.

7. The device for positioning and lap length control of the main reinforcement bars of the steel cage according to claim 1, characterized in that, The second locking structure includes a second locking hole disposed on the main rib clamping sleeve and a second locking member that cooperates with the second locking hole.

8. The device for positioning and lap length control of main reinforcement bars in a steel cage according to claim 1, characterized in that, The connector is a connecting rod.

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