Connecting and fixing device for overhanging type scaffold rod piece and I-shaped steel

Abstract

The invention belongs to the technical field of constructional engineering, and particularly relates to an overhanging type scaffold rod piece and I-shaped steel connecting and fixing device which comprises overhanging I-shaped steel, a vertical fixing assembly and a horizontal fixing assembly. The vertical fixing assembly comprises a fixing frame connected to the outer side of the end, away from the floor slab, of the overhanging I-shaped steel in a sleeving mode, inserting pieces are symmetrically arranged on the front side and the rear side of the fixing frame correspondingly, inserting holes matched with the vertical rods are formed in the inserting pieces, and the horizontal fixing assembly is arranged above the overhanging I-shaped steel and located on the right side of the vertical fixing assembly. The clamping device comprises a first semicircular clamping sleeve and a second semicircular clamping sleeve which are rotationally connected, and a clamping space matched with a horizontal rod is formed between the first semicircular clamping sleeve and the second semicircular clamping sleeve. Loads of the vertical rods and the horizontal rods are transmitted to the I-shaped steel respectively, the stability and safety of the whole structure are ensured, and the wind resistance and shock resistance are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of construction engineering, and particularly relates to a connecting and fixing device for a cantilever scaffold member and an I-beam. Background Art

[0002] With the continuous increase in building height and scale, the cantilever scaffold is widely used in the construction of various projects due to its good safety, economy and construction convenience, especially in the construction of high-rise buildings. The cantilever scaffold is a commonly used protective facility, which is divided into two types: one pick per floor and multi-layer cantilever. When the cantilever scaffold is erected, the erection height of each section does not exceed 20m, and the cantilever I-beam is used as the foundation of the scaffold to cantilever and erect the scaffold in sections.

[0003] The main components of the cantilever scaffold mainly include a steel support frame (I-beam), a steel pipe scaffold and a coupling member. The connection between each part is crucial for the overall safety and stability of the scaffold. The I-beam and the floor are usually fixedly connected to the floor by a U-shaped loop coupling member. The steel pipe scaffold usually directly contacts the surface of the upper flange of the I-beam. Under the support of the I-beam, the upper steel pipe scaffold stably rests on the I-beam.

[0004] Thus, it can be seen that the connection between the traditional steel pipe scaffold vertical pole and the I-beam is relatively weak. It is only through contact. Under the action of various factors, when the scaffold is subjected to horizontal loads, the reliability of the connection between the bottom member and the I-beam will be greatly reduced, and it is easy to cause overall instability. From the perspective of the load transfer route, the I-beam is the ultimate transfer point of all loads of the scaffold. After the construction and self-weight loads are transferred to the I-beam, they are then transferred to the floor through the I-beam. The strength of the I-beam is far sufficient, but the connection between the member and the I-beam, that is, the load transfer channel is weak and prone to slippage. The horizontal bar and the vertical pole are connected by a buckle. The self-weight of the bottom horizontal bar and the construction load above are first transferred to the vertical pole, and then the vertical pole is transferred to the I-beam. This load transfer route will cause the vertical pole to bear a large load. Once the vertical pole loses stability, the overall collapse of the scaffold will occur, and the overall safety reserve is relatively insufficient. For a cantilever scaffold with a curved wall, the horizontal bar will be divided into several small sections, and form several separate individuals in contact with the I-beam through buckles with the vertical pole, forming several independent working scaffold frames, and the overall safety and stability are greatly reduced. In addition, when installing the traditional cantilever scaffold, a large amount of vertical pole positioning and measuring work is required to ensure the accurate position of the vertical pole.

[0005] Therefore, there is an urgent need to design a new type of fixing device to effectively connect and fix the horizontal rods and vertical rods directly to the I-beams respectively, so that the vertical load transfer channels become the vertical rods and horizontal rods transferring to the I-beams respectively, thereby improving the overall safety reserve. Even in the case of a curved exterior wall, it is inconvenient to arrange the longer bottom horizontal rod (sweeper bar). Due to the effective connection between the horizontal rod and the I-beam, the overall stiffness will not be affected. Summary of the Invention

[0006] The purpose of the present invention is to solve the defects and deficiencies in the prior art and provide a connecting and fixing device for the cantilever scaffold members and I-beams, which can achieve a firm connection between the cantilever scaffold members and the I-beams, and improve the safety of the scaffold and the reuse rate of materials.

[0007] To achieve the above purpose, the technical solution adopted by the present invention is: a connecting and fixing device for the cantilever scaffold members and I-beams, including:

[0008] A cantilever I-beam, which is fixed on the floor by at least two groups of U-shaped pull rings;

[0009] A vertical fixing component, which includes a fixing frame sleeved on the outer side of the end of the cantilever I-beam away from the floor. Plug connectors are symmetrically arranged on the front and rear sides of the fixing frame, and plug holes matching the vertical rods are opened on the plug connectors;

[0010] A horizontal fixing component, which is arranged above the cantilever I-beam and on the right side of the vertical fixing component, and includes a first semi-circular clamping sleeve and a second semi-circular clamping sleeve that are rotatably connected. A clamping space matching the horizontal rod is formed between the first semi-circular clamping sleeve and the second semi-circular clamping sleeve.

[0011] Preferably, the end of the U-shaped pull ring penetrates through the floor and is threadedly connected with an anchor bolt.

[0012] Preferably, upper fixing plates and lower fixing plates are respectively arranged at the upper and lower ends of the front and rear sides of the inner wall of the fixing frame. Upper clamping grooves matching the front and rear sides of the upper flange of the cantilever I-beam are formed between the two upper fixing plates and the top surface of the fixing frame, and lower clamping grooves matching the front and rear sides of the lower flange of the cantilever I-beam are formed between the two lower fixing plates and the bottom surface of the fixing frame.

[0013] Preferably, first tightening bolts are respectively arranged on the front and rear sides of the top surface of the fixing frame. The end of the first tightening bolt penetrates through the top surface of the fixing frame and abuts against the upper surface of the upper flange of the cantilever I-beam. The bottom surface of the upper fixing plate is threadedly connected with a second tightening bolt, and the end of the second tightening bolt penetrates through the upper fixing plate and abuts against the lower surface of the upper flange of the cantilever I-beam.

[0014] Preferably, anti-slip pads are respectively arranged on the front and rear sides of the bottom surface of the fixed frame. The ends of the anti-slip pads are abutted against the lower surface of the lower flange of the cantilever I-beam. The top surface of the lower fixing plate is threadedly connected with a third tightening bolt. The end of the third tightening bolt penetrates through the lower fixing plate and abuts against the upper surface of the lower flange of the cantilever I-beam.

[0015] Preferably, rotating sleeves are respectively arranged on the front and rear sides of the top of the first semi-circular clamping sleeve. A rotating rod matched with the rotating sleeve is arranged on the top of the second semi-circular clamping sleeve through a connecting seat. The rotating rod is rotatably connected in the rotating sleeve.

[0016] Preferably, first connecting strips are respectively arranged at positions corresponding to the front and rear sides of the cantilever I-beam at the bottom of the first semi-circular clamping sleeve. First connecting plates extending towards each other are respectively arranged at the bottoms of the two first connecting strips. The bottom surface of the first connecting plate is threadedly connected with a fourth tightening bolt. The end of the fourth tightening bolt penetrates through the first connecting plate and abuts against the lower surface of the upper flange of the cantilever I-beam.

[0017] Preferably, second connecting strips are respectively arranged at positions corresponding to the front and rear sides of the cantilever I-beam at the bottom of the second semi-circular clamping sleeve. Second connecting plates extending towards each other are respectively arranged at the bottoms of the two second connecting strips. The bottom surface of the second connecting plate is threadedly connected with a fifth tightening bolt. The end of the fifth tightening bolt penetrates through the second connecting plate and abuts against the lower surface of the upper flange of the cantilever I-beam.

[0018] Preferably, a tie bolt is arranged outside the cantilever I-beam between the first connecting strip and the second connecting strip. The first connecting strip and the second connecting strip are fixedly connected through the tie bolt.

[0019] After adopting the above technical solution, a connecting and fixing device for a cantilever scaffold member and an I-beam provided by the present invention has the following beneficial effects:

[0020] 1) By arranging the vertical fixing component and the horizontal fixing component, the present invention enables the horizontal rod and the vertical rod to independently transfer the load to the I-beam respectively, dispersing the strength of the traditional single transfer of all loads by the vertical rod, and improving the overall safety reserve of the scaffold structure;

[0021] 2) Through the modular components, the present invention makes the connection between the member and the I-beam more stable. By fully squeezing and contacting the I-beam flange, the force on the I-beam is more uniform, and the material strength is fully utilized. Ultimately, it is beneficial to save materials. For the vertical rod, the bottom is approximately a fixed-end constraint, and the compressive stability of the member is significantly improved. For the horizontal rod, the firm connection with the I-beam can ensure the absolute stability of the scaffold floor when the construction workers are working;

[0022] 3) The modular fixing assembly of the present invention does not need to punch or cut the I-beam during use, and the modular fixing assembly can adapt to I-beams of different sizes, greatly improving the scope of application and reuse efficiency of the assembly;

[0023] 4) The use of the fixing components of the present invention is also relatively simple. The vertical poles can be directly inserted into the connectors, and the horizontal poles can be directly buckled with the connectors after being placed, which is very convenient for the construction and disassembly of the scaffolding. At the same time, the standardized and modular design of the fixing components not only makes installation and disassembly more convenient, but also the vertical fixing components and the horizontal fixing components can be recycled, which can greatly reduce the cost of purchasing new components required for each construction and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 It is a front view of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the vertical fixing assembly in the present invention;

[0027] Figure 4 It is a structural schematic diagram of the horizontal fixing assembly in the present invention;

[0028] Figure 5 It is a structural schematic diagram of the horizontal fixing component in the present invention from another perspective.

[0029] Among them: 1. Floor; 2. Cantilever I-beam; 3. U-shaped pull ring; 4. Anchor bolt; 5. Vertical fixing assembly; 501. Fixing frame; 502. First jacking bolt; 503. Upper fixing plate; 504. Second jacking bolt; 505. Anti-slip pad; 506. Lower fixing plate; 507. Third jacking bolt; 508. Connector; 509. Connecting hole; 6. Horizontal fixing assembly; 601. First semicircular clamping sleeve; 602. Rotating sleeve; 603. Second semicircular clamping sleeve; 604. Connecting seat; 605. Rotating rod; 606. First connecting strip; 607. First connecting plate; 608. Fourth jacking bolt; 609. Tension bolt; 610. Second connecting strip; 611. Second connecting plate; 612. Fifth jacking bolt; 7. Vertical pole; 8. Horizontal pole. DETAILED DESCRIPTION

[0030] The present invention will be further clearly and completely described below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present invention or its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that for the sake of convenience of description, the sizes of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0033] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the scope of protection of the present invention; the orientation words "inner, outer" refer to the inside and outside relative to the contour of each component itself.

[0034] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. can be used here to describe the spatial positional relationship of a device or feature shown in the figure with other devices or features. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figure for the device. For example, if the device in the attached drawing is inverted, the device described as "above or over other devices or structures" will then be positioned "below or under other devices or structures". Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations are made for the spatial relative descriptions used here.

[0035] In addition, it should be noted that the use of terms such as "first", "second" etc. to define components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus cannot be construed as limiting the protection scope of the present invention.

[0036] As Figures 1-5 shown, a connecting and fixing device for a cantilever scaffold member and an I-beam provided by the present invention includes a floor slab 1. In the middle of the upper surface of the floor slab 1, a cantilever I-beam 2 is provided. The cantilever I-beam 2 is fixed to the floor slab 1 through at least two groups of U-shaped pull rings 3. The ends of the two groups of U-shaped pull rings 3 both penetrate through the floor slab 1 and are threadedly connected with anchor bolts 4. With such a design, the connection stability between the cantilever I-beam 2 and the floor slab 1 is enhanced, effectively preventing the shaking or falling off of the cantilever structure and improving the safety of the overall structure. At a position on the outer side of the cantilever I-beam 2 away from the floor slab 1, a vertical fixing assembly 5 is provided for fixedly connecting a vertical rod 7. At a position above and on the outer side of the cantilever I-beam 2 and to the right of the vertical fixing assembly 5, a horizontal fixing assembly 6 is provided for fixing a horizontal rod 8.

[0037] The vertical fixing assembly 5 includes a fixing frame 501. The fixing frame 501 is sleeved on the outer side of the cantilever I-beam 2. Both the front and rear sides of the fixing frame 501 are fixedly connected with plug-in members 508. Plug-in holes 509 are opened above the two groups of plug-in members 508. A vertical rod 7 is inserted into each of the two plug-in holes 509. The bottom of the plug-in member 508 is closed, providing an effective support point for the vertical rod 7. And the plug-in member 508 and the fixing frame 501 are of an integral structure. The size of the vertical fixing assembly 5 is slightly larger than the size of the cantilever I-beam 2 shown in the figure, so as to adapt to I-beams of different sizes.

[0038] Specifically, upper fixing plates 503 and lower fixing plates 506 are respectively arranged at the upper and lower ends of the front and rear sides of the inner wall of the fixing frame 501. Upper clamping grooves that match the front and rear sides of the upper flange of the cantilever I-beam 2 are formed between the two upper fixing plates 503 and the top surface of the fixing frame 501. Lower clamping grooves that match the front and rear sides of the lower flange of the cantilever I-beam 2 are formed between the two lower fixing plates 506 and the bottom surface of the fixing frame 501. First tightening bolts 502 are respectively arranged at the front and rear sides of the top surface of the fixing frame 501. The ends of the first tightening bolts 502 penetrate through the top surface of the fixing frame 501 and abut against the upper surface of the upper flange of the cantilever I-beam 2. Second tightening bolts 504 are threadedly connected to the bottom surface of the upper fixing plate 503. The ends of the second tightening bolts 504 penetrate through the upper fixing plate 503 and abut against the lower surface of the upper flange of the cantilever I-beam 2. Anti-slip pads 505 are respectively arranged at the front and rear sides of the bottom surface of the fixing frame 501. The ends of the anti-slip pads 505 abut against the lower surface of the lower flange of the cantilever I-beam 2. Third tightening bolts 507 are threadedly connected to the top surface of the lower fixing plate 506. The ends of the third tightening bolts 507 penetrate through the lower fixing plate 506 and abut against the upper surface of the lower flange of the cantilever I-beam 2.

[0039] It should be noted that the multi-point tightening design formed by the above first tightening bolts 502, second tightening bolts 504, anti-slip pads 505, and third tightening bolts 507 ensures the close fit between the fixing frame 501 and the cantilever I-beam 2, fixes the I-beam from multiple directions, and greatly enhances the firmness and stability of the fixation.

[0040] The horizontal fixing assembly 6 includes a first semi-circular clamping sleeve 601 and a second semi-circular clamping sleeve 603 that are rotatably connected. Both the first semi-circular clamping sleeve 601 and the second semi-circular clamping sleeve 603 are arranged above the upper flange of the cantilever I-beam 2. Rotating sleeves 602 are respectively arranged at the front and rear sides of the top of the first semi-circular clamping sleeve 601. Rotating rods 605 that match the rotating sleeves 602 are arranged at the top of the second semi-circular clamping sleeve 603 through a connecting seat 604. The two groups of rotating rods 605 are rotatably connected in the two groups of rotating sleeves 602. A clamping space that matches the horizontal rod 8 is formed between the first semi-circular clamping sleeve 601 and the second semi-circular clamping sleeve 603. The cooperation between the rotating sleeve 602 and the rotating rod 605 allows for a certain adjustment of the first semi-circular clamping sleeve 601 and the second semi-circular clamping sleeve 603 in the horizontal direction, facilitating the fixation of horizontal rods 8 with different sizes.

[0041] Specifically, first connecting bars 606 are respectively arranged at positions corresponding to the front and rear sides of the cantilever I-beam 2 at the bottom of the first semi-circular clamping sleeve 601. First connecting plates 607 extending towards each other are respectively arranged at the bottoms of the two first connecting bars 606. A fourth tightening bolt 608 is threadedly connected to the bottom surface of the first connecting plate 607. The end of the fourth tightening bolt 608 penetrates through the first connecting plate 607 and abuts against the lower surface of the upper flange of the cantilever I-beam 2. Second connecting bars 610 are respectively arranged at positions corresponding to the front and rear sides of the cantilever I-beam 2 at the bottom of the second semi-circular clamping sleeve 603. Second connecting plates 611 extending towards each other are respectively arranged at the bottoms of the two second connecting bars 610. A fifth tightening bolt 612 is threadedly connected to the bottom surface of the second connecting plate 611. The end of the fifth tightening bolt 612 penetrates through the second connecting plate 611 and abuts against the lower surface of the upper flange of the cantilever I-beam 2. With such a design, the fourth tightening bolt 608 and the fifth tightening bolt 612 tighten the semi-circular clamping sleeve from below, forming multi-point support with the upper flange of the cantilever I-beam 2, thereby improving the reliability of horizontal fixation.

[0042] It should be noted that a tie bolt 609 is arranged outside the cantilever I-beam 2 between the first connecting bar 606 and the second connecting bar 610. The first connecting bar 606 and the second connecting bar 610 are fixedly connected through the tie bolt 609. The use of the tie bolt 609 further enhances the connection strength between the semi-circular clamping sleeves, ensuring the stability of the horizontal bar 8.

[0043] The working principle of the connecting and fixing device for the cantilever scaffold member and the I-beam of the present invention is as follows: When installing the vertical fixing assembly 5, first, the fixing frame 501 is sleeved outside the cantilever I-beam 2, then the position is adjusted, the first tightening bolt 502 is screwed so that its end abuts against the upper surface of the upper flange of the cantilever I-beam 2, the second tightening bolt 504 is screwed so that its end abuts against the bottom surface of the upper flange of the cantilever I-beam 2, the anti-slip pad 505 is made to abut against the bottom surface of the lower flange of the cantilever I-beam 2, and the third tightening bolt 507 is screwed so that its end abuts against the upper surface of the lower flange of the cantilever I-beam 2. After the vertical fixing assembly 5 is fixed, the vertical rod 7 is inserted into the insertion hole 509 and locked with screws. When installing the horizontal fixing assembly 6, first, the first semi-circular clamping sleeve 601 and the second semi-circular clamping sleeve 603 are sleeved on the upper flange of the cantilever I-beam 2, then the horizontal bar 8 is passed through the middle of the first semi-circular clamping sleeve 601 and the second semi-circular clamping sleeve 603, and then the first semi-circular clamping sleeve 601 and the second semi-circular clamping sleeve 603 are buckled together and locked with the tie bolt 609. After the horizontal bar 8 is fixed, the fourth tightening bolt 608 and the fifth tightening bolt 612 are screwed so that their ends abut against the bottom surface of the upper flange of the cantilever I-beam 2 to complete the fixation of the horizontal bar 8.

[0044] In summary, a connecting and fixing device for the cantilever scaffold members and the I-beam provided by the present invention transfers the loads of the vertical poles and the horizontal poles to the I-beam respectively through the design of the vertical fixing component and the horizontal fixing component, thereby ensuring the structural stability, well guaranteeing the stability during erection, and preventing slippage. The cooperation between the plug-in member and the vertical pole makes the installation and disassembly of the vertical pole simple and fast, while ensuring the connection strength between the vertical pole and the cantilever I-beam, facilitating the erection and disassembly of the scaffold. The standardized and modular design of the components makes the installation and disassembly more convenient. The vertical fixing component and the horizontal fixing component can be recycled, which can greatly reduce the cost of purchasing new components required for each erection and disassembly. By using the above components, the adjustment of the positions of the vertical poles and the horizontal poles during the erection of the cantilever scaffold is more flexible and convenient, greatly improving the construction convenience. The stable connection of the vertical fixing component and the horizontal fixing component ensures the stability and safety of the overall structure, and improves the ability to resist natural disasters such as wind and earthquake.

[0045] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A connecting and fixing device for a cantilever scaffolding rod and an I-beam, characterized in that: include: A cantilevered I-beam (2), wherein the cantilevered I-beam (2) is fixed to the floor slab (1) via at least two sets of U-shaped pull rings (3); A vertical fixing assembly (5), the vertical fixing assembly (5) comprising a fixing frame (501) sleeved on the outer side of one end of the cantilevered I-beam (2) away from the floor slab (1), plug-in components (508) being symmetrically arranged on the front and rear sides of the fixing frame (501), and a plug-in hole (509) matching with the vertical pole (7) being provided on the plug-in component (508); A horizontal fixing assembly (6) is arranged above the cantilevered I-beam (2) and located on the right side of the vertical fixing assembly (5), and comprises a first semicircular clamping sleeve (601) and a second semicircular clamping sleeve (603) which are rotatably connected, and a clamping space which cooperates with the horizontal rod (8) is formed between the first semicircular clamping sleeve (601) and the second semicircular clamping sleeve (603).

2. The device for connecting and fixing a cantilever scaffolding rod to an I-beam according to claim 1, characterized in that: The end of the U-shaped pull ring (3) passes through the floor slab (1) and is threadedly connected with an anchor bolt (4).

3. The device for connecting and fixing a cantilever scaffolding rod to an I-beam according to claim 1, characterized in that: An upper fixing plate (503) and a lower fixing plate (506) are respectively arranged at the upper and lower ends of the front and rear sides of the inner wall of the fixing frame (501); an upper clamping groove matching the front and rear sides of the upper wing plate of the cantilevered I-beam (2) is formed between the two upper fixing plates (503) and the top surface of the fixing frame (501); and a lower clamping groove matching the front and rear sides of the lower wing plate of the cantilevered I-beam (2) is formed between the two lower fixing plates (506) and the bottom surface of the fixing frame (501).

4. The device for connecting and fixing a cantilever scaffolding rod to an I-beam according to claim 3, characterized in that: The first tightening bolt (502) is respectively arranged on the front and rear sides of the top of the fixing frame (501), the end of the first tightening bolt (502) passes through the top of the fixing frame (501) and abuts against the upper surface of the upper wing plate of the cantilevered I-beam (2), and the bottom surface of the upper fixing plate (503) is threadedly connected with a second tightening bolt (504), the end of the second tightening bolt (504) passes through the upper fixing plate (503) and abuts against the lower surface of the upper wing plate of the cantilevered I-beam (2).

5. The device for connecting and fixing a cantilever scaffolding rod to an I-beam according to claim 3, characterized in that: Anti-skid pads (505) are respectively arranged on the front and rear sides of the bottom of the fixing frame (501), and the ends of the anti-skid pads (505) abut against the lower surface of the lower wing plate of the cantilevered I-beam (2). The top surface of the lower fixing plate (506) is threadedly connected with a third tightening bolt (507), and the ends of the third tightening bolts (507) penetrate the lower fixing plate (506) and abut against the upper surface of the lower wing plate of the cantilevered I-beam (2).

6. The device for connecting and fixing a cantilever scaffolding rod to an I-beam according to claim 1, characterized in that: A rotating sleeve (602) is respectively arranged at the front and rear sides of the top of the first semicircular clamping sleeve (601), and a rotating rod (605) matching with the rotating sleeve (602) is arranged at the top of the second semicircular clamping sleeve (603) through a connecting seat (604), and the rotating rod (605) is rotatably connected in the rotating sleeve (602).

7. The device for connecting and fixing a cantilever scaffolding rod to an I-beam according to claim 1, characterized in that: The first connecting strips (606) are respectively arranged at the positions on the front and rear sides of the cantilevered I-beam (2) at the bottom of the first semicircular clamping sleeve (601), and the bottoms of the two first connecting strips (606) are respectively arranged with first connecting plates (607) extending in the directions of each other, and the bottom surface of the first connecting plate (607) is threadedly connected with a fourth tightening bolt (608), and the end of the fourth tightening bolt (608) passes through the first connecting plate (607) and abuts against the lower surface of the upper wing plate of the cantilevered I-beam (2).

8. The device for connecting and fixing a cantilever scaffolding rod to an I-beam according to claim 7, characterized in that: Second connecting strips (610) are respectively arranged at the positions of the front and rear sides of the cantilevered I-beam (2) at the bottom of the second semicircular clamping sleeve (603); second connecting plates (611) extending in mutually opposite directions are respectively arranged at the bottoms of the two second connecting strips (610); the bottom surfaces of the second connecting plates (611) are threadedly connected with fifth tightening bolts (612); the ends of the fifth tightening bolts (612) penetrate the second connecting plates (611) and abut against the lower surfaces of the upper wing plates of the cantilevered I-beam (2).

9. The device for connecting and fixing a cantilever scaffolding rod to an I-beam according to claim 8, characterized in that: A tension bolt (609) is provided between the first connecting bar (606) and the second connecting bar (610) on the outside of the cantilevered I-beam (2), and the first connecting bar (606) and the second connecting bar (610) are fixedly connected by the tension bolt (609).

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