Scaffold profile steel cantilever anchoring device

Abstract

The utility model discloses a scaffold section steel overhanging anchoring device, which relates to the field of scaffold overhanging anchoring, aims to solve the problem of resource waste caused by disposable use of a traditional scaffold overhanging beam anchoring device, and adopts the technical scheme that the scaffold section steel overhanging anchoring device comprises two connecting rods which are oppositely arranged, a positioning groove allowing a cantilever beam to penetrate through is formed between the two oppositely-arranged connecting rods, the ends, located above the top face of the formwork, of the connecting rods are sleeved with top positioning plates, the ends, located below the bottom face of the formwork, of the connecting rods are sleeved with bottom positioning plates, and the connecting rods are sleeved with sleeves in a sliding mode. A communicating hole for the connecting rod to penetrate through is formed in the formwork, a plugging device for plugging the communicating hole is arranged at the end, close to the formwork, of the sleeve, and the effect that metal materials of all anchoring devices are recycled, so that the waste amount of building materials is greatly reduced is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of cantilever anchoring of scaffolding, in particular to a steel cantilever anchoring device for scaffolding. Background Art

[0002] At present, with the rapid development of the construction industry, building structures are advancing towards higher and more complex forms, and high-rise and special-shaped building structures are increasing day by day. The cantilever scaffolding is often a necessary condition to ensure its smooth construction. It has the advantages of flexible layout, good safety performance, and no interference with other processes, and is widely used. It is gradually developing towards tooling, and the research on the cantilever steel beam anchoring device is exactly the embodiment of tooling. This device is applied to a section between the cantilever steel beam of the external scaffolding and the concrete floor slab, and plays a role in anchoring and fixing the steel beam on the concrete floor slab to resist the bending force transmitted by the external scaffolding load.

[0003] The existing anchoring device includes a U-shaped anchoring bar. First, the U-shaped anchoring bar is pre-embedded in the steel bar frame with the formwork set up, and then the position of the anchoring bar is fixed with concrete. The concrete forms a concrete slab on the top surface of the formwork. Then, the cantilever steel beam is placed on the concrete slab and passed through the anchoring bar. A sealing steel plate is sleeved at the open end of the anchoring bar, so that the length direction of the sealing steel plate straddles the open end of the anchoring bar and presses on the top wall of the cantilever steel beam. Finally, nuts are threadedly fitted on the two steel bars at the open end of the anchoring bar to press the sealing steel plate firmly on the cantilever steel beam.

[0004] The above existing technical solutions have the following defects: After the existing building is completed, when the peripheral scaffolding is removed, the anchoring bars are no longer necessary, and the cantilever beams can still be recycled. However, the U-shaped anchoring bars are buried in the concrete and cannot be recycled at all, resulting in waste of building materials. Moreover, long anchoring bars protrude from the concrete slab of the building, and it takes time and effort to cut them uniformly. There may also be safety hazards during the process of cutting the steel bars, which undoubtedly shows the disadvantages of the existing anchoring bar technology. How to solve these disadvantages has become an urgent problem to be solved. Content of the Utility Model

[0005] The purpose of the utility model is to provide a steel cantilever anchoring device for scaffolding, which can recycle all the metal materials in the anchoring device, thus greatly reducing the waste of building materials.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A steel cantilever anchoring device for a scaffolding, comprising a positioning component for restricting the position of a cantilever beam on a concrete slab, the concrete slab being poured on the top surface of a formwork, the cantilever beam comprising a cantilever section extending out of the concrete slab and a fixed section contacting the concrete slab, and a plurality of the positioning components being arranged along the extending direction of the fixed section;

[0008] The positioning component comprises two oppositely arranged connecting rods, a positioning slot for the cantilever beam to pass through is formed between the two oppositely arranged connecting rods, a top positioning plate is sleeved on one end of the connecting rod above the top surface of the formwork, a bottom positioning plate is sleeved on one end of the connecting rod below the bottom surface of the formwork, and both the top positioning plate and the bottom positioning plate span across the positioning slot;

[0009] A top limiting device for preventing the top positioning plate from falling off towards the end away from the formwork is arranged at one end of the connecting rod extending out of the top surface of the formwork, and a bottom limiting device for preventing the bottom positioning plate from falling off towards the direction away from the formwork is arranged at one end of the connecting rod extending out of the bottom surface of the formwork;

[0010] A sleeve is slidably sleeved on the connecting rod, the sleeve is located on the upper surface of the formwork, one end of the sleeve close to the formwork abuts against the formwork, a communication hole for the connecting rod to pass through is formed in the formwork, a plugging device for plugging the communication hole is arranged at one end of the sleeve close to the formwork, and the height of the sleeve is greater than the thickness of the concrete slab and less than the sum of the thickness of the concrete slab and the height of the cantilever beam.

[0011] By adopting the above technical solution, the translational freedom of the cantilever beam in the horizontal direction is restricted by arranging two connecting rods on both sides of the cantilever beam. Top positioning plates and bottom positioning plates are respectively arranged at both ends of the two connecting rods. Then, through the top limiting device and the bottom limiting device, the distance between the top positioning plate and the bottom positioning plate can be controllably tightened, thereby restricting the vertical displacement of the cantilever beam on the concrete slab. Then, a sleeve is sleeved on the connecting rod to isolate the concrete poured by the formwork, so as to prevent the connecting rod from being fixed in the concrete slab and prepare for the subsequent recovery of the connecting rod. Since the end of the connecting rod located at the bottom of the formwork is also removable, more choices are left for the position of the end of the connecting rod extending out of the bottom wall of the concrete slab. Because the bottom positioning plate can be removed, the end of the connecting rod extending out of the bottom wall of the concrete can be either between the formwork and the concrete slab or extend out of the bottom surface of the formwork. No matter which option is chosen, the formwork can be removed without affecting the formwork removal process. If the bottom positioning plate is located between the formwork and the concrete ground, it will cause the bottom positioning plate and part of the connecting rod to sink into the bottom wall of the concrete slab. Forcible removal will leave a groove on the bottom wall of the concrete slab, damaging the strength of the concrete slab to a certain extent. In this solution, the bottom positioning plate is arranged on the bottom surface of the formwork. The connecting rods in the concrete slab are all wrapped by the sleeve, and the plugging device can block the communication hole during concrete pouring. When the cantilever beam can be removed, the operator only needs to remove both the top positioning plate and the bottom positioning plate, and then remove the connecting rod from the sleeve, thereby playing a role in recovering all the metal materials in the positioning component. Moreover, there is only a sleeve in the solidified concrete slab, and the sleeve is made of plastic material, which is relatively easy to remove. Compared with the connecting rod made of metal material, there is no significant cost problem, and cutting the sleeve extending out of the top wall of the concrete slab is much safer than cutting the connecting rod made of metal material, greatly reducing the loss of building materials and reducing the construction safety risk, which is environmentally friendly, green and safe.

[0012] Further, both the top limiting device and the bottom limiting device include fixing nuts threadedly sleeved on the connecting rod, and the fixing nuts at both ends of the connecting rod respectively abut against the top positioning plate and the bottom positioning plate.

[0013] By adopting the above technical solution, when the cantilever beam is inserted between the positioning grooves and needs to be finally fixed on the concrete slab, as long as the fixing nuts on the connecting rod are rotated, the fixing nuts respectively exert a downward force on the top positioning plate and an upward force on the bottom positioning plate. Through the force transmission of the connecting rod, the top positioning and bottom positioning plates clamp the cantilever beam on the concrete slab, thereby playing a role in facilitating the final fixing of the cantilever beam on the concrete slab.

[0014] Further, an extension sleeve is fixedly arranged on the side of the fixing nut away from the formwork, and the extension sleeve is threadedly sleeved on the connecting rod.

[0015] By adopting the above technical solution, the extension sleeve can increase the thread engagement area between the fixing nut and the connecting rod, thereby improving the connection stability of the fixing nut.

[0016] Further, fastening nuts are sleeved on the threads at both ends of the connecting rod in the length direction, and one side of the fastening nut close to the template abuts against the end face of the extension sleeve away from the fixing nut.

[0017] By adopting the above technical solution, after the fastening nut is tightened, it abuts against the end face of the extension sleeve, restricting the freedom degree of the fixing nut in the up and down directions, thereby preventing the fixing nut from loosening and further improving the connection stability of the cantilever beam on the concrete slab.

[0018] Further, the plugging device includes a sealing ring plate sleeved on one end of the sleeve, and the sealing ring plate covers the communication hole.

[0019] By adopting the above technical solution, the sealing ring plate covers the communication hole. When concrete is poured on the template, the weight of the concrete will instead press the sealing plate tightly on the communication hole, so that the concrete cannot flow from between the sealing ring plate and the template to the communication hole, thereby preventing concrete leakage from the communication hole.

[0020] Further, bending-resistant flanges are provided on both sides in the width direction of the top positioning plate and the bottom positioning plate.

[0021] By adopting the above technical solution, the bending-resistant flanges increase the thickness of the top positioning plate and the bottom positioning plate to a certain extent, thereby increasing the stiffness of the top positioning plate and the bottom positioning plate, increasing the bending resistance of the top positioning plate and the bottom positioning plate to a certain extent, and further increasing the connection stability between the concrete slab and the cantilever beam.

[0022] Further, a wedge-shaped positioning block is inserted between the connecting rod and the side wall of the cantilever beam.

[0023] By adopting the above technical solution, the positioning block can fill the gap between the connecting rod and the cantilever beam, thereby preventing the cantilever beam from having a horizontal displacement on the concrete slab.

[0024] In summary, the beneficial technical effects of the present utility model are as follows:

[0025] 1. By adopting the connecting rod, the top positioning plate, the bottom positioning plate, the top limiting device, the bottom positioning plate and the sleeve, the effect of recycling all the metal materials in the cantilever beam anchoring device is achieved;

[0026] 2. By adopting the extension sleeve and the fastening nut, the effect of further stabilizing the position of the cantilever beam is achieved;

[0027] 3. By adopting the sealing ring plate, the effect of preventing the concrete on the template from leaking out of the communication hole is achieved. Brief Description of the Drawings

[0028] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0029] Figure 2 is Figure 1 an enlarged schematic diagram of part A in

[0030] Figure 3 is a schematic diagram of the positioning component in the present utility model;

[0031] Figure 4 is an exploded sectional schematic diagram at the communication hole in the present utility model;

[0032] Figure 5 is Figure 4 an enlarged schematic diagram of part B in

[0033] In the figure, 1, positioning component; 11, concrete slab; 12, cantilever beam; 13, fixed section; 14, cantilever section; 15, template; 2, connecting rod; 21, sleeve; 22, communication hole; 23, plugging device; 24, sealing ring plate; 25, positioning groove; 3, top positioning plate; 31, top limiting device; 32, fixing nut; 33, extension sleeve; 34, fastening nut; 35, bottom positioning plate; 36, bottom limiting device; 37, bending flange; 38, positioning block. Detailed Description of the Preferred Embodiment

[0034] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0035] Embodiment

[0036] Refer to Figures 1 - 5, which is a steel cantilever anchoring device disclosed by the present utility model. It includes several positioning components 1 for anchoring the cantilever beam 12 on the concrete slab 11. When constructing the main building of a high-rise building, in order to prevent construction workers from falling from the high-rise building, a scaffold needs to be erected around the main building of the structure. However, the overall stability of the scaffold is limited. Therefore, a steel cantilever beam 12 is set on the concrete slab 11 of the main building of the structure. One section of the cantilever beam 12 in contact with the concrete slab 11 is the fixed section 13, and the section of the cantilever beam 12 extending out of the concrete slab 11 is the cantilever section 14. Construction workers fix the scaffold on the cantilever section 14 and then anchor the fixed section 13 on the concrete slab 11, so that the scaffold can be fixed on the concrete slab 11 through the cantilever beam 12, thereby improving the stability of the scaffold on the periphery of the main building of the structure; the existing anchoring method is to preset the anchoring device on the formwork 15 before pouring the concrete slab 11. After the concrete slab 11 is formed on the formwork 15, the anchoring device poured into the concrete slab 11 has been buried in the concrete slab 11, and then the cantilever beam 12 and the anchoring device are connected. However, when the cantilever beam 12 is recycled, the anchoring device has been buried in the concrete slab 11 and cannot be taken out, which will cause a large amount of building materials to be wasted.

[0037] Refer to Figures 1 - 5 , and in this solution, there are three positioning components 1 evenly distributed along the fixed section 13. The positioning component 1 includes two connecting rods 2. The two connecting rods 2 are arranged on both sides in the width direction of the cantilever beam 12. A positioning groove 25 for placing the cantilever beam 12 is formed between the two connecting rods 2. A sleeve 21 is sleeved outside the two connecting rods 2. The sleeve 21 in the present utility model is a plastic pipe made of PVC material. One end in the height direction of the positioning groove 25 is provided with a top positioning plate 3, and the other end is provided with a bottom positioning plate 35. The top positioning plate 3 and the bottom positioning plate 35 are simultaneously sleeved on the two connecting rods 2 and are arranged across the width direction of the positioning groove 25. Before pouring the concrete slab 11, the connecting rods 2 are vertically arranged on the formwork 15. And in order to facilitate the connecting rods 2 to pass through the formwork 15, a through hole 22 for the connecting rods 2 to pass through is opened on the formwork 15; the top positioning plate 3 is located above the top surface of the formwork 15, and the bottom positioning plate 35 is located below the bottom surface of the formwork 15.

[0038] Refer to Figures 1 - 5, at both ends of the connecting rod 2 in the length direction, there are respectively a top limiting device 31 to prevent the top positioning plate 3 from falling off and a bottom limiting device 36 to prevent the bottom positioning plate 35 from falling off. The top limiting device 31 and the bottom limiting device 36 are respectively fixed nuts 32 arranged at both ends of the connecting rod 2 in the length direction. The fixed nuts 32 are threadedly engaged with the connecting rod 2. In order to increase the threaded engagement area between the fixed nut 32 and the connecting rod 2, an extension sleeve 33 is arranged on the end face of the fixed nut 32. In order to further improve the stability of the fixed nut 32, a fastening nut 34 is arranged at one end of the extension sleeve 33 away from the fixed nut 32. The fastening nut 34 is threadedly engaged with the connecting rod 2, and one end of the fastening nut 34 abuts against the end face of the extension sleeve 33.

[0039] Refer to Figures 1 - 5 , in this way, when it is necessary to fix the cantilever beam 12 on the concrete slab 11, as long as the cantilever beam 12 is inserted between the positioning grooves 25, and then the top positioning plate 3 and the bottom positioning plate 35 are clamped on both sides of the cantilever beam 12 in the height direction by the fixed nut 32, so as to play the role of fixing the cantilever beam 12 on the concrete slab 11. When the cantilever beam 12 needs to be recovered, as long as the fixed nut 32, the top positioning plate 3 and the bottom positioning plate 35 are removed from the connecting rod 2, and then the connecting rod 2 is pulled out from the sleeve 21, the function of recovering all the metal materials of the anchoring device can be achieved.

[0040] Refer to Figures 1 - 5 , in order to improve the overall stiffness of the top positioning plate 3 and the bottom positioning plate 35, bending-resistant flanges 37 are arranged on both sides of the top positioning plate 3 and the bottom positioning plate 35 in the width direction. The bending-resistant flanges 37 extend along the length direction of the top positioning plate 3 and the bottom positioning plate 35. In order to prevent the cantilever beam 12 from swaying left and right in the positioning groove 25, a wedge-shaped positioning block 38 is inserted between the connecting rod 2 and the cantilever beam 12. The positioning block 38 in this scheme is made of solid wood.

[0041] Refer to Figures 1 - 5, the use of the positioning component 1, first of all, the positioning mark is made, and the position of the cantilever beam 12 on the concrete slab 11 is determined according to the needs, and then the penetration position of the connecting rod 2 on the template 15 is calculated according to the position of the cantilever beam 12, and a mark is drawn on the template 15, and then a connecting hole 22 is opened at the mark; then the preliminary installation is carried out, the construction personnel vertically place the sleeves 21 corresponding to the positions of the connecting holes 22 one by one, and then put the top positioning plate 3 on the two connecting rods 2, and screw the fixing nuts 32 of a certain depth into the two connecting rods 2 to ensure that the top positioning plate 3 does not extend from the connecting rod 2 One end of the top surface of the template 15 slides down, and then the top positioning plate 3 is lifted to insert the connecting rods 2 into the sleeves 21 one by one, and the connecting rods 2 are extended to the bottom of the template 15 through the connecting hole 22, and then the bottom positioning plate 35 is sleeved on the connecting rods 2 extending from the bottom surface of the template 15, and then the fixing nuts 32 are sleeved on the connecting rods 2 extending from the bottom surface of the template 15, and the bottom positioning plate 35 is made to contact the bottom surface of the template 15 through the fixing nuts 32; then it is finally fixed, and after the concrete slab 11 on the template 15 is poured and reaches the required strength, the construction workers are on the concrete slab 11 Rotate the fixing nut 32 on the connecting rod 2 to increase the height of the positioning groove 25 on the concrete slab 11 until the cantilever beam 12 is inserted, and then the cantilever beam 12 is inserted into multiple positioning assemblies 1 in sequence, and then rotate the fixing nut 32 again to finally compact the top positioning plate 3 on the cantilever beam 12, and finally tighten the fastening nuts 34 at both ends of the connecting rod 2; then the formwork 15 is removed. When the formwork 15 needs to be removed, the construction workers first remove one positioning assembly 1, and the other positioning assemblies 1 on the same cantilever beam 12 do not move, and then the removed positioning assembly 1 is put back Fixed on the bottom wall of the concrete slab 11, then remove another positioning assembly 1, and so on. When the last positioning assembly 1 is removed, the other positioning assemblies 1 on the same beam have transferred the fulcrum from the template 15 to the bottom wall of the concrete slab 11. After the fulcrum of the last positioning assembly 1 is transferred to the bottom wall of the concrete slab 11, the template 15 can be removed; finally, the anchoring device is recovered. When the main structure of the building is completed and the peripheral scaffolding needs to be removed, unscrew the fastening nuts 34 and the fixing nuts 32 one by one, and then pull out the connecting rod 2 in the sleeve 21.

[0042] Reference Figures 1 - 5, in the positioning mark, by opening a through-hole 22 on the template 15, it is both for the insertion of the connecting rod 2 and for preparing for the subsequent positioning of the sleeve 21; in the preliminary installation, before pouring concrete, the sleeve 21 placed on the template 15 has the steel bars around it tied up, which will play a certain supporting role for the vertical sleeve 21. And an unavoidable problem in this solution is that in order to completely recycle the metal materials in the positioning component 1, the connecting rod 2 is movably inserted into the sleeve 21. However, during the process of pouring concrete, there is a risk that the connecting rod 2 may fall out of the sleeve 21. First, the top positioning plate 3 is sleeved on the two connecting rods 2, and then preliminarily positioned through the fixing nut 32. Then, the bottom positioning plate 35 is sleeved on the connecting rod 2, and preliminarily positioned through the fixing nut 32 again. In this way, the connecting rod 2 will be restricted in the sleeve 21 by the spatial interference between the top positioning plate 3 and the sleeve 21, and will neither fall off from the bottom of the sleeve 21 nor from the top of the sleeve 21. On the one hand, due to the mutual clamping of the top positioning plate 3 and the bottom positioning plate 35, it can also prevent the sleeve 21 from tipping over when pouring the concrete slab 11. On the other hand, the sealing ring plate 24 on the side wall of the sleeve 21 will be subjected to a pressure initially compressing on the template 15, which can effectively prevent the concrete from flowing into the space between the template 15 and the sealing ring plate 24; in the final fixing, first rotate the fixing nut 32 to release a certain space for the telescopic space of the connecting rod 2 and increase the height of the positioning groove 25. Then, the operator lifts the top positioning plate 3 one by one to increase the aperture of the positioning groove 25 on the concrete slab 11, facilitating the operator to insert the cantilever beam 12 into the positioning groove 25. When the cantilever beam 12 moves to the designated position in multiple positioning grooves 25, rotate the fixing nut 32 to press the top positioning plate 3 on the top wall of the cantilever beam 12, thereby playing a role in fixing the cantilever beam 12 on the concrete slab 11; during the removal of the template 15, since multiple positioning components 1 are fixed on the cantilever beam 12, by removing and installing them one by one, it will neither cause the cantilever beam 12 to loosen, nor will it affect the removal of the template 15. The removal of the template 15 lags behind the construction of the higher-level building main body. The fundamental reason is that when formwork is erected on the upper layer, the formwork 15 of the lower-layer beam and slab has not reached the age and does not meet the formwork removal conditions; during the recovery of the anchoring device, when the cantilever beam 12 needs to be removed, loosen the fixing nut 32 and the connecting rod 2 can be withdrawn from the sleeve 21, and all the fixing nut 32, fastening nut 34, top positioning plate 3 and bottom positioning plate 35 can be recycled.

[0043] Refer to Figures 1 - 5, The removal steps of the positioning component 1 include first unscrewing the fastening nut 34 at one end of the connecting rod 2 extending out of the bottom surface of the template 15, then unscrewing the fixing nut 32 at one end of the connecting rod 2 extending out of the bottom surface of the template 15, and finally removing the bottom positioning plate 35 at one end of the connecting rod 2 extending out of the bottom surface of the template 15 from the connecting rod 2; then screwing the removed fixing nut 32 onto the connecting rod 2, the fixing nut 32 passes through the communication hole 22 and abuts against the bottom wall of the concrete slab 11, and then screwing the fastening nut 34 onto the connecting rod 2 and abutting against the end face of the extension sleeve 33.

[0044] Refer to Figures 1 - 5 , At the beginning of the design, in order to be able to remove all the positioning components 1, it was thought that except for the sleeve 21, other parts of the positioning component 1 should not contact the concrete during the pouring process. At this time, it was thought of making the connecting rod 2 extend out of the bottom surface of the template 15, and then restricting the upward movement tendency of the connecting rod 2 through the bottom positioning plate 35 and the fixing nut 32 at the same time. However, at this time, the bottom surface of the template 15 is a force point of the positioning component 1, which leads to the problem that the subsequent template 15 cannot be removed. Then, by setting multiple positioning components 1, even if one positioning component 1 is removed, the other positioning components 1 can still firmly fix the cantilever beam 12. Then, a communication hole 22 is opened on the template 15. When the template 15 needs to be removed, it is also the time when the concrete slab 11 can bear force. Then continue to rotate the fixing nut 32, and the fixing nut 32 passes through the communication hole 22 and abuts against the bottom wall of the concrete slab 11, so as to complete the transfer of the force point of the positioning component 1. At this time, the fixing nuts 32 on the two connecting rods 2 are sufficient to restrict the upward movement tendency of the connecting rod 2, and the bottom positioning plate 35 has been recovered. By analogy, the force points of multiple positioning components 1 are transferred one by one. At this time, there is no bottom positioning plate 35 on the template 15 that restricts the downward movement of the template 15, and the normal removal of the template 15 can be completed. Moreover, in order to prevent the concrete in the flowing state from leaking out of the communication hole 22, a sealing ring plate 24 is sleeved on the outer side wall of the sleeve 21 near one end of the template 15, and the sealing ring plate 24 covers the communication hole 22, so that this solution can both not affect the normal construction and completely recover the metal materials in the positioning component 1.

[0045] Refer to Figures 1 - 5 , When specifically recycling and removing the positioning component 1, first remove the fastening nut 34 and the fixing nut 32 at one end of the connecting rod 2 extending out to the bottom surface of the template 15, and then the construction worker holds the top positioning plate 3 and pulls out the two connecting rods 2 from the sleeve 21 together; the connecting rod 2 is slidably inserted into the sleeve 21. If the top positioning plate 3 is removed first, the connecting rod 2 will fall under the action of gravity, which will cause potential safety hazards. By first removing the bottom positioning plate 35 and then pulling out the connecting rod 2 from above, this kind of potential safety hazard can be prevented.

[0046] The embodiments of this specific implementation manner are all preferred embodiments of the present utility model, and do not limit the protection scope of the present utility model. Therefore, all equivalent changes made according to the structure, shape, and principle of the present utility model shall be covered within the protection scope of the present utility model.

Claims

1. A scaffolding steel cantilever anchoring device, characterized in that: The invention comprises a positioning assembly (1) for limiting the position of a cantilever beam (12) on a concrete slab (11), wherein the concrete slab (11) is cast on the top surface of a formwork (15), and the cantilever beam (12) comprises a cantilever section (14) extending out of the concrete slab (11) and a fixed section (13) contacting the concrete slab (11), and a plurality of positioning assemblies (1) are provided along the extending direction of the fixed section (13); The positioning assembly (1) includes two connecting rods (2) arranged opposite to each other, a positioning groove (25) for the cantilever beam (12) to pass through is formed between the two connecting rods (2), one end of the connecting rod (2) located above the top surface of the template (15) is sleeved with a top positioning plate (3), and one end of the connecting rod (2) located below the bottom surface of the template (15) is sleeved with a bottom positioning plate (35), and the top positioning plate (3) and the bottom positioning plate (35) are both arranged across the positioning groove (25); One end of the connecting rod (2) extending from the top surface of the template (15) is provided with a top limiting device (31) for preventing the top positioning plate (3) from falling off in a direction away from the template (15); and one end of the connecting rod (2) extending from the bottom surface of the template (15) is provided with a bottom limiting device (36) for preventing the bottom positioning plate (35) from falling off in a direction away from the template (15); The connecting rod (2) is slidably sleeved with a sleeve (21) on the outside. The sleeve (21) is located on the upper surface of the template (15). The end of the sleeve (21) close to the template (15) contacts the template (15). The template (15) is provided with a connecting hole (22) for the connecting rod (2) to pass through. The end of the sleeve (21) close to the template (15) is provided with a blocking device (23) for blocking the connecting hole (22). The height of the sleeve (21) is greater than the thickness of the concrete slab (11), and the height of the sleeve (21) is less than the height of the concrete slab (11) plus the cantilever beam (12).

2. The scaffolding steel cantilever anchoring device according to claim 1, characterized in that: The top limiting device (31) and the bottom limiting device (36) both comprise fixing nuts (32) threadedly sleeved on the connecting rod (2), and the fixing nuts (32) at both ends of the connecting rod (2) respectively abut against the top positioning plate (3) and the bottom positioning plate (35).

3. The scaffolding steel cantilever anchoring device according to claim 2, characterized in that: An extension sleeve (33) is fixedly provided on the side of the fixing nut (32) away from the template (15), and the extension sleeve (33) is threadedly sleeved on the connecting rod (2).

4. The scaffolding steel cantilever anchoring device according to claim 3, characterized in that: The threaded sleeves at both ends of the connecting rod (2) in the length direction are provided with fastening nuts (34), and the side of the fastening nut (34) close to the template (15) abuts against the end surface of the extension sleeve (33) away from the fixing nut (32).

5. The scaffolding steel cantilever anchoring device according to claim 4, characterized in that: The blocking device (23) comprises a sealing ring plate (24) sleeved on one end of the sleeve (21), and the sealing ring plate (24) covers the communicating hole (22).

6. The scaffolding steel cantilever anchoring device according to claim 5, characterized in that: Anti-bending flanges (37) are provided on both sides of the top positioning plate (3) and the bottom positioning plate (35) in the width direction.

7. The scaffolding steel cantilever anchoring device according to claim 6, characterized in that: A wedge-shaped positioning block (38) is inserted between the connecting rod (2) and the side wall of the cantilever beam (12).

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