Square reinforcement cage spacing control tool

Abstract

The utility model relates to a square reinforcement cage interval control instrument, including main body frame, adjusting lever, spacing piece and adjusting limiting device, the main body frame is by main body upper frame body and main body lower frame body passes through bolt assembly detachable connection, and the upper and lower frame body all are equipped with sliding slot and both sides's location hole, adjusting lever passes the sliding slot and extends to the inside of frame, and the end detachable connection U type location fixture, and the inside of fixture is equipped with gasket, adjusting limiting device contains location cover, location lever and adjusting handle, and the location lever on location cover cooperates with location hole, and adjusting handle is connected with location cover through bearing and the inner hole thread is adapted with adjusting lever, the frame is horizontal through the adjusting support foot, and the position of adjusting lever is adjusted by rotating adjusting handle, and the main reinforcement is fixed with location fixture, realizes the accurate control of interval, the utility model discloses the purpose is to solve the square reinforcement cage interval control efficiency low, the precision is poor in the prior art, and part control instrument structure is complicated, is difficult to adapt to different specifications reinforcement cage and main reinforcement easily shifts the problem.

Description

Technical Field

[0001] This utility model belongs to the field of building construction technology and relates to a tool for controlling the spacing of square steel cages. Background Technology

[0002] In the field of building construction, the steel cage is the core load-bearing skeleton of the concrete structure. For square steel cages, the accuracy of the spacing between the main bars and stirrups directly affects the synergistic effect between the steel bars and the concrete, and thus determines the crack resistance, durability and overall load-bearing capacity of the building structure. Therefore, the control of the spacing of square steel cages is a key link in the quality control of building construction and is widely used in the construction process of important building components such as pile foundations, shear walls and basement slabs.

[0003] In the actual production and use of square steel reinforcement cages, spacing control faces many pressing issues. Traditional construction methods mainly rely on manual handheld measuring tools for positioning and binding, which is not only labor-intensive and inefficient, but also susceptible to human factors such as operator experience, sense of responsibility, and measuring techniques. This leads to poor consistency in main bar spacing and stirrup positioning deviation, causing deformation or displacement of the steel reinforcement cage during subsequent concrete pouring, resulting in uneven structural stress and seriously affecting project quality. At the same time, different projects have significant differences in the required specifications of square steel reinforcement cages, such as main bar diameter, spacing, and frame length and width. Traditional manual control methods are difficult to flexibly adapt to the production needs of multiple specifications, further restricting the improvement of construction efficiency and quality.

[0004] After reviewing relevant materials, there are currently two main solutions for controlling the spacing of square rebar cages. One is the traditional manual measurement method, which relies on simple tools such as measuring tapes and string. It requires no specialized equipment and has a low barrier to entry, but its accuracy and efficiency are poor, failing to meet the demands of large-scale, high-standard construction. The other is the specialized tool control method, such as a simple tool for controlling the spacing of longitudinal bars in a rebar cage (patent number CN222133312U). This patent uses spaced rebars welded to the side wall of the handle-adjusting rebar, and the length of the section where the spaced rebars meet the handle-adjusting rebar limits the spacing between adjacent longitudinal bars. The longitudinal bars are positioned using L-shaped slots. From a production application perspective, compared to traditional manual measurement methods, these specialized tools are simpler in structure and easier to manufacture, and can improve the accuracy of longitudinal reinforcement positioning and processing efficiency to a certain extent. However, they also have significant limitations. The spacing of the reinforcing bars and the handle adjustment bars are welded and fixed structures, and the spacing cannot be flexibly adjusted. They can only be adapted to a single specification of rebar cage, resulting in poor versatility. Furthermore, they can only achieve longitudinal reinforcement positioning and cannot simultaneously address the spacing control of stirrups and the stable use of the tool on uneven sites, making it difficult to meet the needs of all-dimensional spacing control and multi-scenario production for square rebar cages. A comprehensive analysis of existing solutions reveals that traditional manual measurement methods lack accuracy and efficiency, and existing specialized tools lack versatility and functional completeness. Therefore, there is an urgent need to develop a square rebar cage spacing control tool that can adapt to multiple specifications, provide all-dimensional positioning, and be suitable for complex sites, in order to solve the pain points in actual production. Utility Model Content

[0005] This utility model provides a square rebar cage spacing control tool, which solves the problems of low efficiency and poor accuracy in the existing square rebar cage spacing control, as well as the complex structure of some control tools, which are difficult to adapt to rebar cages of different specifications and the main bars are easy to shift.

[0006] To solve the above problems, the technical solution adopted by the utility model is as follows: A square rebar cage spacing control tool includes a main frame, an adjusting rod, a limiting component, and an adjusting and limiting device. The main frame is composed of an upper main frame and a lower main frame, which are detachably connected by bolt assemblies. Both the upper and lower main frames have sliding grooves, and positioning holes are spaced apart on both sides of the sliding grooves. The adjusting rod passes through the sliding grooves and extends to the inside of the main frame. A positioning clamp is detachably connected to the end of the adjusting rod near the inside of the main frame. The positioning clamp has a U-shaped structure and a gasket on its inner side. The adjusting and limiting device includes a positioning sleeve, a positioning rod, and an adjusting handle. The positioning sleeve has a positioning rod that mates with the positioning hole. The inner hole of the positioning sleeve is a smooth hole, and the adjusting rod can rotate within the positioning sleeve. The adjusting handle is located at the end of the positioning sleeve away from the main frame and is connected to a bearing of the positioning sleeve. The inner hole of the adjusting handle is a threaded hole, which is threadedly connected to the adjusting rod. The position of the adjusting rod can be adjusted by rotating the adjusting handle.

[0007] The principle and advantages of this scheme are as follows: Through the synergy of modular design and mechanical adjustment structure, precise control and stable positioning of the square rebar cage spacing are achieved. The main frame adopts a structure in which the upper and lower main frames are detachably connected by bolt assemblies, allowing for flexible assembly according to the size requirements of square rebar cages of different specifications. Simultaneously, the adjustable support feet at the bottom of the frame can adapt to uneven ground, ensuring the overall level of the frame and providing a stable foundation for spacing control. Sliding grooves in the upper and lower main frames provide a movement path for the adjustment rods. Combined with the positioning holes on both sides of the sliding grooves, the movement range of the adjustment rods can be initially limited to meet different spacing adjustment needs. The adjustment rods extend through the sliding grooves to the inside of the frame, and their ends are detachably connected to U-shaped positioning clamps for direct... The clamp's inner shims increase friction with the main reinforcement bar, preventing displacement during binding. The adjusting limit device initially fixes the adjusting rod by engaging the positioning rod and positioning hole on the positioning sleeve. Then, by connecting the adjusting handle to the positioning sleeve's bearing and the adjusting handle's threaded hole with the adjusting rod's threaded engagement, rotating the adjusting handle drives the adjusting rod to move horizontally along the smooth hole inside the positioning sleeve, precisely adjusting the fit between the positioning clamp and the main reinforcement bar. This ultimately achieves precise control of the main reinforcement bar spacing. The entire adjustment process does not require complex external equipment and can be completed manually.

[0008] Compared with existing technologies, some control tools in existing technologies adopt a fixed structure and can only be adapted to a single specification of rebar cage. However, this solution, through the detachable connection of the main frame and the flexible movement of the adjusting rod along the sliding groove, can be freely adjusted according to the length, width and main bar spacing requirements of the rebar cage. For example, for rebar cages with a main bar diameter of 25mm and a spacing of 200mm and rebar cages with a main bar diameter of 32mm and a spacing of 250mm, only the U-shaped positioning clamp with the corresponding opening size needs to be replaced and the position of the adjusting rod needs to be adjusted to adapt them. There is no need to remake the entire set of tools, which greatly improves the versatility and reusability of the tools. Regarding control accuracy and stability, traditional manual measurement methods are prone to spacing deviations exceeding ±15mm due to human error, and some specialized tools lack effective anti-displacement structures. This solution, however, utilizes a dual guarantee of threaded drive and locking positioning holes in the adjusting limit device to control spacing errors within ±5mm. Furthermore, the pads on the inner side of the U-shaped positioning clamp effectively prevent the main reinforcement bars from slipping. For example, during stirrup binding, even if subjected to external force, the main reinforcement bars will not shift due to insufficient friction, ensuring the overall structure of the rebar cage remains regular. In terms of ease of operation and cost, existing complex control tools require professional personnel and are expensive. All adjustment structures in this solution are designed for manual operation, requiring no specialized skills for quick mastery. Simultaneously, the main frame uses high-strength steel and modular components, resulting in lower manufacturing costs than traditional complex equipment. The detachable structure facilitates transportation and storage, making it particularly suitable for construction sites with limited space.

[0009] Furthermore, the main frame is made of steel, with both the upper and lower main frames being cuboid frame structures. These frames are connected to form a rectangular frame. Steel itself possesses high strength, high rigidity, and good resistance to deformation, providing a stable and reliable support foundation for the fabrication of the square rebar cage. This effectively prevents tools from bending or shifting under stress, ensuring that the accuracy of rebar cage spacing control is not affected by tool deformation. The cuboid frame structure has a high degree of compatibility with the shape of the square rebar cage, precisely fitting its contour dimensions. This allows components such as adjusting rods and positioning clamps to be arranged orderly along the frame, thereby achieving comprehensive positioning and spacing control of the main reinforcement and stirrups of the rebar cage, preventing issues caused by frame structure variations. The mismatch between the frame and the rebar cage leads to positioning deviations. However, the design of connecting the upper and lower frames to form a rectangular frame allows for flexible adjustment of the assembly dimensions of the upper and lower frames according to the length and width requirements of different sized square rebar cages. This eliminates the need to manufacture separate sets of tools for different sizes of rebar cages, significantly improving the versatility and reusability of tools and reducing construction costs. Furthermore, the modular frame structure facilitates transportation and on-site assembly, especially in scenarios with limited construction space. The upper and lower frames can be transported to the site separately and quickly assembled, reducing the space occupied during transportation and the difficulty of handling. Moreover, if a frame is damaged during subsequent maintenance, only the corresponding part needs to be replaced, without replacing the entire frame, further reducing usage and maintenance costs.

[0010] Furthermore, the bottom of the main frame is equipped with height-adjustable support feet, which are threadedly connected to the main frame. This threaded, adjustable structure can flexibly adapt to construction sites with varying flatness. Regardless of whether the ground has slight slopes, bumps, or depressions, workers can simply rotate the support feet to individually adjust the height of each support point, ensuring the main frame remains level. This advantage prevents the adjustment rods and positioning clamps from shifting due to frame tilt, thus preventing deviations in the spacing of the main reinforcement bars in the steel cage. This ensures spacing control accuracy from the foundation level and solves the problem of inaccurate positioning caused by uneven ground with traditional tools. Secondly, the threaded connection method... This design features structural stability and prevents the position from easily loosening after adjustment. During the fabrication of the rebar cage, even if the tools are subjected to external forces generated by operations such as placing the main reinforcement bars and tying the stirrups, the support legs can maintain a fixed height, preventing the frame from shaking and affecting the overall forming quality of the rebar cage. In addition, this design does not rely on additional leveling tools such as wooden blocks or wedges, making it convenient to operate and highly precise in adjustment. Workers can quickly complete the leveling of the frame, reducing preparation time and improving construction efficiency. At the same time, the threaded connection of the support legs is easy to assemble and disassemble. The support legs can be disassembled and stored for subsequent tool maintenance or transportation, reducing storage and handling space requirements and further adapting to the flexibility needs of on-site construction.

[0011] Furthermore, the sliding groove is an elongated bolt groove, and the adjusting rod can move along the length of the elongated bolt groove. The structural form of the elongated bolt groove can directly provide a continuous and stable movement path for the adjusting rod, allowing the adjusting rod to be flexibly adjusted along the length of the groove without disassembly. Compared with the fixed hole design, it can more accurately adapt to the personalized design requirements of the main reinforcement spacing of square steel cages in different projects. For example, when the design spacing of the main reinforcement of the steel cage is adjusted from 200mm to 250mm, there is no need to change the installation position of the adjusting rod or modify the frame structure. It is only necessary to push the adjusting rod along the elongated bolt groove to the corresponding position, which greatly improves the tool's adaptability to steel cages of different specifications. At the same time, the elongated bolt groove... The groove structure of the bolt slot effectively limits the movement direction of the adjusting rod, preventing lateral deviation during movement and ensuring that the adjusting rod is always adjusted in the preset direction. This guarantees the alignment accuracy between the positioning clamp and the main reinforcement bar, reducing spacing deviations caused by rod displacement. Furthermore, the engagement method between the elongated bolt groove and the adjusting rod eliminates the need for additional complex guiding mechanisms, resulting in a simple structure and convenient operation. Workers can quickly adjust the position of the adjusting rod on-site, shortening the pre-fabrication time for the rebar cage. Simultaneously, the groove's enveloping support enhances the stability of the adjusting rod during use, preventing swaying under stress and further ensuring the accuracy and reliability of rebar cage spacing control.

[0012] Furthermore, the positioning holes are evenly spaced along the length of the sliding groove, and the spacing between two adjacent positioning holes is adapted to the design spacing of the reinforcing cage. The evenly distributed positioning holes that are adapted to the design spacing can be directly used as the "reference scale" for positioning the adjusting rod. The staff does not need to repeatedly calibrate the spacing with measuring tools. They only need to match the positioning rod of the adjusting limit device with the corresponding positioning hole to quickly fix the adjusting rod in a position that meets the design requirements of the reinforcing cage. This effectively avoids reading errors and cumulative errors that are easy to occur in manual measurement, and ensures that the spacing between adjacent main bars is always consistent with the design standard. For example, when the design spacing of the reinforcing cage is 200mm, the spacing between adjacent positioning holes is simultaneously set to 200mm. After the adjusting rod is inserted into the corresponding positioning hole, the precise positioning of the 200mm spacing of the main bars can be directly achieved, which greatly improves the accuracy of spacing control. From an operational efficiency perspective, this design eliminates the tedious steps of repeated measurement, marking, and adjustment in traditional construction. Workers do not need complex measurement skills; they can simply position the adjustment rod using the positioning holes and positioning rods. This significantly shortens the spacing adjustment time in the early stages of rebar cage fabrication. Especially when mass-producing square rebar cages of the same specifications, it enables rapid replication of the adjustment rod position, further improving construction efficiency. From an adaptability and stability perspective, the distribution of positioning holes adapted to the design spacing can accurately match common rebar cage spacing specifications in engineering projects, ensuring that the tool can be directly connected to actual construction needs without additional modification to the positioning holes. At the same time, the cooperation between the positioning holes and positioning rods can form a rigid lock, preventing the adjustment rod from shifting due to external forces during rebar cage binding, providing a reliable guarantee for the stability of spacing control.

[0013] Furthermore, the U-shaped opening size of the positioning clamp can be adapted and replaced according to the diameter of the main reinforcement bars of the steel cage. The U-shaped opening faces the center of the inner side of the main frame. The diameter of the main reinforcement bars in square steel cages varies in different projects, such as 25mm or 32mm. The design of interchangeable opening sizes eliminates the need to remake the entire tool set for changes in the main reinforcement bar diameter. Only the clamp with the corresponding opening size needs to be replaced to achieve a tight fit with the main reinforcement bar. This avoids problems such as loose positioning or excessive clamping damaging the main reinforcement bar due to mismatch between the clamp opening and the main reinforcement bar diameter, significantly improving the tool's adaptability to steel cages of different specifications and reducing construction costs and tool replacement complexity. In terms of positioning stability and accuracy, the U-shaped opening faces... The U-shaped opening, positioned towards the center of the main frame, concentrates the clamping force of the main reinforcement bars on the central direction of the frame. This ensures that the main reinforcement bars remain within the preset outline of the square steel cage after placement, preventing them from "bulging outward" or "retracting inward" due to deviation in the opening direction. This, in turn, ensures the regularity of the overall steel cage structure. For example, when tying stirrups, the main reinforcement bars are prone to slight displacement due to the tension of the stirrups. The U-shaped opening facing the center can form a reverse limit through the inner wall, offsetting part of the tension and reducing the risk of main reinforcement bar displacement. At the same time, the pads on the inner side of the clamp further enhance the friction with the main reinforcement bars, providing double protection for the stability of the main reinforcement bars during the manufacturing process. Ultimately, this improves the forming quality and spacing accuracy of the square steel cage.

[0014] Furthermore, the gasket is made of rubber and is fixedly connected to the inner side of the limiting member. From the perspective of protecting the main reinforcement, the rubber material is soft and has good elasticity. When in contact with the main reinforcement of the steel cage, it can prevent the metal material of the limiting member from directly rubbing against the main reinforcement, effectively preventing the anti-rust layer on the surface of the main reinforcement from being scratched and damaged. This reduces the risk of the main reinforcement affecting the structural load-bearing capacity due to corrosion in subsequent use, especially for main reinforcement with a small diameter and easily damaged surface, where this protective effect is more prominent. From the perspective of positioning stability, the rubber material has a high coefficient of friction, and its friction with the surface of the main reinforcement is much greater than the friction between metal and metal, allowing it to firmly adhere to the surface of the main reinforcement and avoid... During the fabrication of the steel cage without reinforcement bars, the main reinforcement bars may slide or shift due to external forces when the stirrups are tied or the tools are moved slightly. This ensures that the spacing of the main reinforcement bars always meets the design requirements, solving the problem of main reinforcement bar offset that is prone to occur in traditional shimless limiting methods. In terms of adaptability, the elasticity of rubber can compensate for the slight deviation between the U-shaped opening size of the limiting part and the diameter of the main reinforcement bar to a certain extent. Even if there is a slight error in the opening size, the deformation of the rubber can achieve a tight fit with the main reinforcement bar, improving the adaptability and fault tolerance of the limiting part to main reinforcement bars of different diameters. At the same time, the rubber material is wear-resistant and anti-aging, which can adapt to the complex environment of the construction site, extend the service life of the shims, and reduce the frequency of tool maintenance and replacement.

[0015] Furthermore, the adjusting rod and the limiting component are detachably fixed via threaded or snap-fit ​​connections. Both threaded and snap-fit ​​connections require no complex tools; workers can install and remove the limiting component manually on-site. Threaded connections achieve a secure fixation by rotating the limiting component, while snap-fit ​​connections use a snap-fit ​​structure for quick connection. Both methods significantly reduce the time required for replacing or adjusting the limiting component, especially when different U-shaped opening sizes of the limiting component need to be frequently changed according to the specifications of the main reinforcement bars in the rebar cage. This effectively improves construction efficiency and avoids delays caused by complex tool disassembly and assembly. In terms of adaptability, the detachable fixing method allows the same adjusting rod to be used with different specifications. The limiting components, such as those with different U-shaped opening sizes and different inner shim materials, only require replacement with the corresponding limiting component based on the current requirements such as the diameter of the main reinforcement bars and the surface condition of the rebar cage. There is no need to configure an adjustment rod separately for different needs, which significantly improves the tool's adaptability to various sizes of square rebar cages and reduces the overall investment cost of the equipment. From the perspective of maintenance economy, if the limiting components suffer from wear and deformation due to long-term use, the staff can disassemble and replace the damaged limiting components separately without replacing the entire adjustment rod, which greatly reduces the cost of replacing parts and the waste of resources. At the same time, when transporting or storing the tool, the adjustment rod and the limiting components can be separated and stored separately, reducing the space occupied and improving the convenience of transportation and storage.

[0016] Furthermore, the positioning rod is fixedly connected to the positioning sleeve and can extend and retract radially along the positioning sleeve to achieve insertion and removal with the positioning hole. This radial extension and retraction design allows workers to quickly insert or remove the positioning rod with the positioning hole without disassembling other components, simply by pushing or pulling it. When adjusting the position of the adjusting rod, pulling the positioning rod out of the positioning hole releases the restriction on the adjusting rod. After pushing the adjusting rod along the sliding groove to the target position, the positioning rod is then pushed into the corresponding positioning hole to complete the fixation. The entire process requires no additional tools, significantly shortening the operation time for spacing adjustment. This is especially beneficial when adjusting the positions of multiple adjusting rods in batches, significantly improving construction efficiency. Moreover, the fixed connection between the positioning rod and the positioning sleeve prevents relative displacement between them, ensuring that the positioning rod always extends and retracts along the preset radial direction, ensuring precision. The precise alignment with the positioning hole reduces difficulties in insertion and removal or inaccurate positioning caused by positioning rod misalignment. Simultaneously, the rigid limit formed by the positioning rod after insertion into the positioning hole firmly locks the position of the adjusting rod, preventing movement due to external forces during rebar cage fabrication, such as when tying stirrups or placing main reinforcement bars, thus ensuring the stability of the main reinforcement bar spacing. From a structural adaptability perspective, the radial telescopic structure requires minimal space and can be compactly integrated into the positioning sleeve, fitting seamlessly with the tool's overall modular design. This avoids increasing the tool's size and affecting on-site operation while adapting to positioning holes with different spacings on both sides of the sliding groove. Regardless of where the adjusting rod moves in the sliding groove, the telescopic movement of the positioning rod quickly locates and aligns with the corresponding positioning hole, further enhancing the tool's flexibility in adjusting the spacing of rebar cages of different specifications.

[0017] Furthermore, the outer surface of the adjusting handle is provided with anti-slip texture, and the bearing between the adjusting handle and the positioning sleeve is a deep groove ball bearing. The anti-slip texture increases the friction between the hand and the outer surface of the adjusting handle, allowing the operator to hold the handle stably and apply rotational force even if their hands are covered with dust, oil, or sweat due to the construction site environment, preventing slippage. This is especially beneficial when the handle needs to be rotated repeatedly to fine-tune the position of the adjusting rod, reducing hand fatigue and improving operational efficiency. The deep groove ball bearing has the characteristics of low friction coefficient and high rotational precision, ensuring that the adjusting handle rotates smoothly and without jamming on the positioning sleeve. The operator can precisely control the adjustment by making slight rotations of the handle. The horizontal movement distance of the adjusting rod is controlled to avoid over- or under-adjustment due to bearing jamming, thereby ensuring the control accuracy of the main reinforcement spacing of the steel cage and solving the adjustment sluggishness problem that easily occurs with traditional bearings. In terms of structural durability, the deep groove ball bearing can withstand radial loads and a certain axial load, effectively dispersing the force generated during the rotation of the adjusting handle, preventing wear and deformation of the connection between the positioning sleeve and the handle due to long-term stress. At the same time, its good sealing performance can reduce the entry of dust and impurities into the bearing from the construction site, extend the bearing service life, ensure the long-term stable operation of the adjusting limit device, and reduce the frequency and cost of tool maintenance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is the front view of the present invention.

[0020] Figure 3 This is a side view of the present invention.

[0021] Figure 4 This is a schematic diagram of the adjustable limit device. Detailed Implementation

[0022] The reference numerals in the accompanying drawings include: 1. Main frame; 2. Lower main frame; 3. Upper main frame; 4. Adjusting rod; 5. Positioning clamp; 6. Adjusting limit device; 7. Positioning hole; 8. Internal threaded hole; 9. Smooth hole; 10. Bearing; 11. Positioning sleeve; 12. Adjusting handle; 13. Bolt; 14. Main reinforcement bar of steel cage; 15. Support leg; 16. Shim; 17. Positioning rod; 18. Square steel cage; 19. Sliding groove. Example 1 like Figures 1-4As shown, a square rebar cage spacing control tool includes a main frame 1, an adjusting rod 4, a positioning clamp 5, and an adjusting limit device 6. The main frame 1 is composed of an upper main frame 3 and a lower main frame 2, which are detachably connected by bolts 13. It is made of high-strength steel, and both are rectangular frame structures. After assembly, they form a rectangular frame that fits the square rebar cage 18. The assembly size can be flexibly adjusted according to the specifications of the rebar cage.

[0023] The lower frame 2 has adjustable support feet 15 at each of its four corners. These support feet 15 are threaded to the main frame 1. Rotating the support feet 15 adjusts the height of each support point, adapting to uneven construction sites and ensuring the main frame 1 remains level and stable. Both the upper frame 3 and the lower frame 2 have elongated bolt grooves around their perimeter serving as sliding grooves 19. Positioning holes 7 are evenly spaced along the length of each sliding groove 19, with a spacing of 200mm between adjacent positioning holes 7, consistent with common steel reinforcement cage design spacing.

[0024] An adjusting rod 4 passes through the sliding groove and extends to the inside of the main frame 1. The adjusting rod 4 can move freely along the length of the sliding groove 18 to adapt to different spacing adjustment requirements. This adjusting rod is a threaded screw. A positioning clamp 5 is detachably fixed to one end of the adjusting rod 4 near the inside of the main frame 1 via a threaded connection. The positioning clamp 5 has a U-shaped structure, with its U-shaped opening facing the center of the inside of the main frame 1. The opening size is 30mm, suitable for the 25mm diameter main reinforcement bar 14 of the steel cage. A rubber gasket 16 is fixedly connected to the inside of the positioning clamp 5. When the gasket 16 contacts the main reinforcement bar, it increases friction, preventing displacement of the main reinforcement bar and protecting the anti-rust layer on the surface of the main reinforcement bar.

[0025] The adjusting limit device 6 includes a positioning sleeve 11, a positioning rod 17, and an adjusting handle 12. The positioning rod 17, which can extend and retract radially, is fixedly connected to the positioning sleeve 11. The positioning rod 17 engages with the positioning hole 7 to achieve initial positioning of the adjusting rod 4. The inner hole of the positioning sleeve 11 is a smooth hole 9, allowing the adjusting rod 4 to rotate freely within the positioning sleeve 11. The adjusting handle 12 is located at the end of the positioning sleeve 11 furthest from the main frame 1 and is connected to the positioning sleeve 11 via a deep groove ball bearing 10. The outer surface of the adjusting handle 12 has anti-slip textures, and its inner hole is an internally threaded hole 8, threadedly connected to the adjusting rod 4. Rotating the adjusting handle 12 drives the adjusting rod 4 to move horizontally.

[0026] The usage process of this embodiment is as follows: Tool assembly and leveling: Based on the length and width of the square steel cage 18 to be manufactured, assemble the upper frame 3 and the lower frame 2 of the main body into the corresponding rectangular main frame 1 using bolts 13. Place the assembled tool on the construction site, rotate the bottom support feet 15, and adjust the height of each support point to keep the main frame 1 level.

[0027] Spacing preset and fixed: According to the design spacing of 200mm for the main reinforcement bars of the steel cage, push the adjusting rod 4 to move along the sliding groove. When the adjusting rod 4 moves to the target position, press the positioning rod 17 to insert it into the corresponding positioning hole 7 to complete the initial fixing of the adjusting rod 4.

[0028] Precise adjustment and main reinforcement positioning: Rotate the adjustment handle 12. With the help of the threaded engagement between the adjustment handle 12 and the adjustment rod 4, drive the adjustment rod 4 to move horizontally along the smooth hole 9 inside the positioning sleeve 11, so that the positioning clamp 5 precisely fits the preset position of the main reinforcement. Place the main reinforcement of the steel cage into the U-shaped opening of each positioning clamp 5 in sequence. The rubber gasket 16 fits tightly against the main reinforcement to prevent the main reinforcement from shifting during subsequent operations.

[0029] Rebar cage fabrication and tool disassembly: After positioning the main reinforcement bars, place the stirrups on the main reinforcement bars and tie them in place according to the design requirements. During the tying process, the positioning clamps 5 and shims 16 continuously limit the position of the main reinforcement bars to ensure stable spacing. After the rebar cage is fabricated, rotate the adjusting handle 12 to disengage the positioning clamps 5 from the main reinforcement bars, pull out the positioning rod 17 to release the fixing of the adjusting rod 4, and remove the connecting bolts 13 between the upper frame 3 and the lower frame 2 of the main body. The formed square rebar cage 18 can then be removed. Finally, clean and store the tools.

[0030] Example 2 The difference between this embodiment and Embodiment 1 lies in the different specifications of the steel cage used. For a square steel cage 18 with a main bar diameter of 32mm and a design spacing of 250mm, the positioning clamp 5 is replaced so that its U-shaped opening size is 40mm to ensure a tight fit with the 32mm diameter main bar. At the same time, the position of the adjusting rod 4 is adjusted so that adjacent adjusting rods 4 engage with the corresponding positioning holes 7 through the positioning rod 17, and the spacing between adjacent adjusting rods 4 after fixing is 250mm.

[0031] In use, follow the operating steps of Example 1 to assemble and level the tool, preset and fix the spacing, make precise adjustments and position the main reinforcement bars, and then perform the stirrup binding operation. Since the positioning holes 7 are evenly distributed along the sliding groove and the adjusting rod 4 can move flexibly, it is only necessary to replace the positioning clamp 5 and adjust the position of the adjusting rod 4 to adapt to the new specification of the rebar cage, without having to replace the entire set of tools, which significantly improves the versatility of the tool.

[0032] The above are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A tool for controlling the spacing of a square steel reinforcement cage, characterized in that, The device includes a main frame, an adjusting rod, a limiting component, and an adjusting and limiting device. The main frame is composed of an upper main frame and a lower main frame, which are detachably connected by bolts. Both the upper and lower main frames have sliding grooves, and positioning holes are spaced apart on both sides of the sliding grooves. The adjusting rod passes through the sliding grooves and extends to the inside of the main frame. A positioning clamp is detachably connected to the end of the adjusting rod near the inside of the main frame. The positioning clamp has a U-shaped structure and a gasket on its inner side. The adjusting and limiting device includes a positioning sleeve, a positioning rod, and an adjusting handle. The positioning sleeve has a positioning rod that mates with the positioning hole. The inner hole of the positioning sleeve is a smooth hole, and the adjusting rod can rotate within the positioning sleeve. The adjusting handle is located at the end of the positioning sleeve away from the main frame and is connected to the positioning sleeve bearing. The inner hole of the adjusting handle is a threaded hole, which is threadedly connected to the adjusting rod. The position of the adjusting rod can be adjusted by rotating the adjusting handle.

2. The square steel cage spacing control tool according to claim 1, characterized in that, The main frame is made of steel. Both the upper and lower main frames are cuboid frame structures, which are connected to form a rectangular frame.

3. The square steel cage spacing control tool according to claim 1, characterized in that, The lower frame of the main body is provided with height-adjustable support feet at its bottom, and the support feet are threadedly connected to the main frame.

4. The square steel cage spacing control tool according to claim 1, characterized in that, The sliding groove is a long strip bolt groove, and the adjusting rod can move along the length of the long strip bolt groove.

5. The square steel cage spacing control tool according to claim 1, characterized in that, The positioning holes are evenly spaced along the length of the sliding groove, and the spacing between two adjacent positioning holes is adapted to the design spacing of the reinforcing cage.

6. The square steel cage spacing control tool according to claim 1, characterized in that, The U-shaped opening size of the positioning clamp can be adapted and changed according to the diameter of the main reinforcement bar of the steel cage, and the U-shaped opening is located at the center of the inner side of the main frame.

7. The square steel cage spacing control tool according to claim 1, characterized in that, The gasket is made of rubber and is fixedly connected to the inner side of the limiting member.

8. The square steel cage spacing control tool according to claim 1, characterized in that, The adjusting rod and the limiting component are detachably fixed by threaded connection or snap-fit ​​connection.

9. The square steel cage spacing control tool according to claim 1, characterized in that, The positioning rod is fixedly connected to the positioning sleeve and can extend and retract radially along the positioning sleeve to achieve insertion and removal engagement with the positioning hole.

10. The square steel cage spacing control tool according to claim 1, characterized in that, The outer surface of the adjusting handle is provided with anti-slip texture, and the bearing between the adjusting handle and the positioning sleeve is a deep groove ball bearing.

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