A telescoping elbow bracket assembly for scaffolding

Abstract

The present application relates to the technical field of building scaffold fittings, and discloses a telescopic elbow support assembly for a scaffold, which comprises a receiving main pipe and a scaffold, and a downward extension pipe is fixedly arranged below one end of the receiving main pipe, and further comprises a bent support pipe, one end of which is fixedly arranged below the other end of the receiving main pipe, and the other end of the downward extension pipe is fixedly connected above the other end of the bent support pipe. The telescopic bearing structure is formed by slidingly assembling the extension pipe inside the receiving main pipe, the total length of the support can be adjusted by pulling out the extension pipe according to the construction requirements on site; in the retracted state, only the receiving main pipe bears, which meets the requirement of setting up a single steel tread plate; after the extension pipe is pulled out, the receiving main pipe and the extension pipe jointly bear, which can set up two steel tread plates side by side, one set of support assembly is suitable for two mainstream setting conditions, various fixed supports of different specifications are not needed, the types of fittings are reduced, the costs of purchase, storage and on-site management are reduced, and the flexibility of setting up the scaffold is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of building scaffolding accessories technology, specifically to a telescopic bent pipe support assembly for scaffolding. Background Technology

[0002] Due to its advantages such as fast erection speed, strong structural stability, and high load-bearing capacity, the modular scaffolding has become the most widely used support system in building exterior wall construction and high-rise formwork systems. During construction, it is generally used in conjunction with standard metal steel planks to build high-altitude work platforms. However, the platform construction components currently used have some shortcomings, as follows:

[0003] Conventional lateral support brackets mostly adopt a fixed-length structure with fixed dimensions, which can only stably support a single standard steel tread. This significantly limits their applicability to various scenarios. Construction sites often encounter situations such as gaps in the scaffolding structure, widened work areas, and irregularly shaped structures, requiring two steel treads to be laid side-by-side. Traditional fixed brackets cannot support two treads simultaneously, forcing construction companies to purchase and stock various extended brackets of different specifications. This results in a complex array of accessory models, heavy warehousing pressure, and a significant increase in material procurement, warehousing, transportation, and on-site material management costs. There is an urgent need for a telescopic, adjustable, self-locking, and anti-loosening scaffolding bend support assembly that can simultaneously support both single and double steel treads. Summary of the Invention

[0004] This invention provides a telescopic curved pipe support assembly for scaffolding, which has the advantages of adjustable telescopic length, anti-rotation and anti-detachment, self-locking fastening, high bending strength, corrosion resistance and durability, and single / double step universal erection, thus solving the problems in the background art.

[0005] This invention provides the following technical solution: a telescopic curved pipe support assembly for scaffolding, comprising a main support pipe and scaffolding, wherein a lower extension pipe is fixedly installed below one end of the main support pipe, and further comprising: a bent support pipe, one end of which is fixedly installed below the other end of the main support pipe, and the other end of the lower extension pipe is fixedly connected above the other end of the bent support pipe; an upper hook assembly is fixedly installed at one end of the main support pipe, which is suspended on the scaffolding; a lower hook assembly is fixedly installed at the other end of the bent support pipe, and the interior of the lower hook assembly is movably engaged with the scaffolding; the lower hook assembly has an opening, and a wedge is provided through the opening to lock the lower hook assembly onto the scaffolding; an extension pipe is movably installed inside the main support pipe and can be pulled out; and a footboard can be installed on the main support pipe and the extension pipe.

[0006] Preferably, the upper hook assembly has a U-shaped hook structure with the opening facing downwards, allowing it to be directly fastened to the scaffolding. The upper hook assembly is integrally formed from S315MC stamped steel plate, with an inner U-shaped arc radius of R15mm and external dimensions of 62±1mm×52.5±1mm. The lower hook assembly is formed by bending SJR stamped steel plate, with two-stage transition radii of R12mm and R18mm at the bending position, and a main body bending angle of 135 degrees. Both the lower and upper hook assemblies have Φ12mm ventilation holes, and the ventilation holes maintain a safe distance from all weld seams without overlapping or covering.

[0007] Preferably, a locking hole is provided at the lower end of the other end of the receiving main pipe, and a sliding groove is provided at the bottom of the extension pipe corresponding to the locking hole. Rivets are provided in the locking hole and the sliding groove to limit the extension pipe, prevent the extension pipe from rotating inside the receiving main pipe, causing the pedal to slip, and limit the extension stroke of the extension pipe.

[0008] Preferably, a baffle is fixedly welded to the other end of the extension tube, and the height of the upper surface of the baffle is higher than the upper surface of the pedal.

[0009] Preferably, the wedge is a tapered inclined surface structure with an inclination angle of 6.9 degrees. The wedge has two sets of positioning holes for squeezing and eliminating the gap between the wedge and the scaffolding.

[0010] Preferably, the bent support pipe is an integral bent pipe, and a reinforcing sleeve is welded to the outer wall of the bent section.

[0011] Preferably, the surface of the lower hook assembly is centrifugally galvanized, and other metal components are uniformly hot-dip galvanized as a whole, with a zinc coating thickness of 70-120μm. All components need to be pickled and degreased before galvanizing to improve the adhesion of the coating.

[0012] Preferably, a limit stop is provided on the receiving main pipe, and when a pedal is separately provided on the receiving main pipe, the limit stop can limit its movement.

[0013] The present invention has the following beneficial effects:

[0014] 1. This invention forms a telescopic load-bearing structure by sliding and assembling extension pipes inside the main support pipe. The total support length can be adjusted by pulling out the extension pipes according to the on-site construction needs. In the retracted state, the main support pipe alone bears the load, meeting the erection requirements of a single steel tread. When the extension pipe is pulled outward, the main support pipe and the extension pipe share the load, enabling two steel treads to be erected side by side. One set of support assembly is suitable for two mainstream erection conditions, eliminating the need to stock multiple specifications of fixed brackets, reducing the types of accessories, lowering procurement, warehousing, and on-site management costs, and significantly improving the flexibility of scaffolding erection.

[0015] 2. This invention utilizes the sidewall of the chute to constrain the circumferential rotation of the extension tube, preventing the steel pedal from slipping laterally due to the rotation of the telescopic tube and eliminating the risk of instability of the aerial work platform; on the other hand, the length of the chute limits the maximum extension stroke of the extension tube, which plays a role in preventing it from coming off. During transportation and disassembly, the extension tube will not be completely separated from the receiving main tube, avoiding the loss of parts. At the same time, the chute is a long groove structure, and the extension length is continuously adjustable, no longer limited to fixed gear positions, and has a wider adjustment range.

[0016] 3. The present invention adopts a closed triangular force-bearing frame consisting of a main pipe, an extension pipe, and an integrated bent support pipe. Compared with the traditional straight pipe right-angle welded bracket, the triangular frame has a more reasonable mechanical structure, and the load can be transmitted in both directions, effectively dispersing the bending moment. The bent support pipe adopts an integrated bending forming process to avoid stress concentration at the right-angle butt weld. Furthermore, reinforcement sleeves are added to the high-stress areas of the bend for reinforcement, which significantly improves the bending and impact resistance of the components. It is not easy to deform and crack under long-term construction loads, thus extending the service life of the bracket.

[0017] 4. The present invention has an upper hook assembly and a lower hook assembly at both ends of the support. The upper and lower hooks simultaneously engage with the scaffold uprights to form a double suspension fixing structure. In conjunction with the wedge block inclined surface squeezing self-locking structure, the wedge block has an inclination angle of 6.9° which is within the self-locking inclined surface angle range. Tapping the wedge block can eliminate the assembly gap between the hook and the scaffold upright, achieving gapless fastening, resisting the loosening problem caused by construction vibration, preventing the support from loosening or slipping under continuous vibration load, and improving the safety of high-altitude operations. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a partial cross-sectional view of the structure of the present invention.

[0020] Figure 3 This is a schematic diagram of the installation of the pedal structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the installation of the lower extension tube and the bent support tube of the present invention;

[0022] Figure 5 This is a schematic diagram of the main pipe for the structure of this invention;

[0023] Figure 6 This is a schematic diagram of the extension tube structure of the present invention;

[0024] Figure 7 This is a schematic diagram of the hook assembly under the structure of the present invention.

[0025] In the diagram: 1. Main pipe; 2. Extension pipe; 3. Lower extension pipe; 4. Lower hook assembly; 5. Wedge block; 6. Bending support pipe; 7. Reinforcing sleeve; 8. Upper hook assembly; 9. Locking hole; 10. Slide groove; 11. Rivet; 12. Baffle; 13. Scaffolding; 14. Step; 15. Limiting block. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figure 1-7 A telescopic curved pipe support assembly for scaffolding includes a main support pipe 1 and a scaffold 13. A lower extension pipe 3 is fixedly installed below one end of the main support pipe 1. The assembly also includes a bent support pipe 6, one end of which is fixedly installed below the other end of the main support pipe 1. The other end of the lower extension pipe 3 is fixedly connected to the upper end of the other end of the bent support pipe 6. An upper hook assembly 8 is fixedly installed at one end of the main support pipe 1, which is suspended from the scaffold 13. A lower hook assembly 4 is fixedly installed at the other end of the bent support pipe 6. The lower hook assembly 4 is movably engaged with the scaffold 13. The lower hook assembly 4 has an opening and a wedge 5 is provided through the opening to lock the lower hook assembly 4 onto the scaffold 13. An extension pipe 2 is movably installed inside the main support pipe 1 and can be pulled out. A footboard 14 can be installed on the main support pipe 1 and the extension pipe 2.

[0028] The main pipe 1, the lower extension pipe 3, and the bent support pipe 6 are interconnected to form a closed triangular load-bearing frame. The triangular mechanical structure can efficiently distribute vertical loads and lateral impact loads, avoiding the defects of stress concentration at single-point welds in traditional straight pipe brackets, and significantly improving the overall structural load-bearing stability. Furthermore, the upper hook assembly 8 and the lower hook assembly 4 are staggered and synchronously snapped onto the same scaffold, forming a two-point suspension constraint. Compared with single-point hook brackets, this can effectively limit the horizontal swing and torsion of the support, improving the overall installation stability. The lower hook assembly 4 has a horizontally penetrating insertion port, through which a wedge 5 is inserted. By striking the wedge 5, the wedge is squeezed and locked, so that the lower hook assembly 4 is firmly locked onto the scaffold 13, eliminating the assembly gap between the hook and the upright and resisting the loosening problem caused by construction vibration.

[0029] The upper hook assembly 8 features a U-shaped hook structure with an opening facing downwards, allowing direct fastening to the scaffolding 13. On-site installation requires no additional fasteners, facilitating convenient suspension. The upper hook assembly 8 is constructed from a single piece of S315MC stamped steel plate, resulting in a seamless, weld-free structure with excellent fatigue resistance. Its U-shaped inner arc (R15mm) ensures a close fit with the outer arc of the scaffolding upright, increasing the contact area and preventing stress concentration that could crush the pipe. Furthermore, its dimensions (62±1mm × 52.5±1mm) match the standard Φ48 disc-lock scaffolding upright diameter in China. It is highly versatile. The lower hook assembly 4 is made of S235JR stamped steel plate and bent. The bending position is set with two-level transition rounded corners of R12mm and R18mm to avoid the risk of plate cracking caused by sharp corner bending. The main body bending angle is 135 degrees to match the pole clamping angle. Both the lower hook assembly 4 and the upper hook assembly 8 are opened with Φ12mm ventilation holes. The ventilation holes maintain a safe distance from all welded seams and do not overlap. During the hot-dip galvanizing process, the ventilation holes can discharge the air inside the component cavity to prevent the galvanized layer from bulging and missing coating defects, and ensure the quality of anti-corrosion processing.

[0030] A locking hole 9 is provided at the lower end of the other end of the main pipe 1, and a sliding groove 10 is provided at the bottom of the extension pipe 2 corresponding to the locking hole 9. Rivets 11 are provided in the locking hole 9 and the sliding groove 10 to limit the extension pipe 2, prevent the extension pipe 2 from rotating inside the main pipe 1, causing the pedal 14 to slip, and limit the extension stroke of the extension pipe 2. On the one hand, the side walls of the sliding groove limit the lateral displacement of the rivets, thereby constraining the extension pipe 2 to rotate around its own axis, preventing the pedal 14 from sliding laterally due to the rotation of the extension pipe 2, and eliminating the risk of the aerial work platform overturning. On the other hand, the end faces of the front and rear ends of the sliding groove form limiting stops, limiting the maximum extension stroke of the extension pipe 2, preventing the extension pipe 2 from completely coming out of the main pipe 1, and avoiding the loss of parts during transportation and disassembly. Unlike the traditional multi-position round hole pin solution, the long sliding groove can achieve continuous length adjustment. Construction personnel can freely adjust the extension length according to the actual placement position of the pedal, without being limited by fixed hole positions, and has stronger on-site adaptability.

[0031] A baffle 12 is fixedly welded to the other end of the extension pipe 2, and the upper surface of the baffle 12 is higher than the upper surface of the pedal 14. When the pedal 14 is laid on top of the extension pipe 2, the baffle 12 forms an end guard to prevent the pedal from sliding outward from the end of the extension pipe under the impact of personnel stepping on it or the action of lateral external force, thereby improving the safety protection capability of the work platform. The baffle 12 and the extension pipe 2 are connected by full welding. After welding, the weld joint is ground to reduce stress concentration and at the same time avoid the sharp corner of the weld joint from scratching the construction personnel.

[0032] The wedge 5 is a tapered inclined surface structure with an inclination angle of 6.9 degrees. It is used to squeeze and eliminate the gap between the wedge 5 and the scaffold 13. The inclination angle is less than the critical angle of steel friction self-locking. After the wedge 5 is squeezed by striking it, it achieves self-locking by relying on the friction of the inclined surface. Under continuous vibration load, the wedge will not rebound and loosen on its own. Two sets of positioning holes are opened on the wedge 5. During construction, ropes or pins can be threaded through to prevent the wedge from accidentally falling off after being locked by striking it. Under the squeezing of the inclined surface of the wedge, the hook assembly 4 fits tightly with the upright of the scaffold 13, completely eliminating the assembly gap and ensuring that the support is installed without shaking.

[0033] The bending support pipe 6 is an integrated 97-degree bend, formed by bending it in one piece using a seamless steel pipe bending machine. This eliminates the traditional two-section pipe butt welding solution and avoids the risk of weld cracking and failure under load at the bending position. The outer wall of the bending section is welded with a reinforcing sleeve 7, which wraps around the high-stress bending area of ​​the bend, further improving the bending and impact resistance of the bend and enhancing the ultimate load-bearing capacity of the component.

[0034] The surface of the lower hook assembly 4 is centrifugally galvanized. Centrifugal galvanizing of stamped thin sheet metal parts can reduce coating accumulation and reduce the risk of deformation. Other metal components are uniformly hot-dip galvanized as a whole, and the zinc coating thickness is 70-120μm. The coating thickness is uniform, taking into account both anti-corrosion performance and component assembly dimensional accuracy. All components must be pickled and degreased before galvanizing to improve coating adhesion, prevent coating peeling and flaking, and extend the outdoor service life of the components.

[0035] A limit stop 15 is provided on the main pipe 1. When a pedal 14 is installed separately on the main pipe 1, the limit stop 15 limits the inner side of the pedal. Together with the baffle 12 on one side of the extension pipe, the pedal is limited in both directions, effectively constraining the horizontal displacement of the pedal and preventing the pedal from sliding accidentally.

[0036] Working principle: Construction workers hoist the entire support frame to the scaffolding erection position. First, the upper hook assembly 8 is hooked onto the scaffolding upright 13 from top to bottom. The support frame is then pulled down so that the lower hook assembly 4 is simultaneously engaged with the outer wall of the upright. Then, the wedge 5 is inserted into the socket of the lower hook assembly 4, and the top of the wedge 5 is struck with a hammer. The inclined plane compression eliminates the gap between the lower hook assembly 4 and the upright, completing the self-locking fixation. Under normal working conditions, the extension pipe 2 is completely retracted into the receiving main pipe 1, and the single steel tread 14 is laid on top of the receiving main pipe 1. The limiting block 15 prevents the tread from moving inward. Slide to complete the single-pedal work platform setup; when it is necessary to widen the work surface or fill gaps in the frame, loosen the rivet 11, pull the extension pipe 2 outward to the target length, and fix the rivet 11 again. The rivet 11 is limited along the sliding groove 10 to prevent rotation and detachment. Then, lay the two pedals 14 on the main pipe 1 and the extension pipe 2 in sequence. The baffle 12 prevents the pedals from sliding outward, thus completing the double-pedal setup; during dismantling, knock the wedge block 5 in the opposite direction to release the lock, remove the pedals in sequence, lift the support upward to make the upper hook assembly 8 detach from the scaffold upright, complete the overall dismantling, and transfer it to the next construction point.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A telescopic curved pipe support assembly for scaffolding, comprising a main support pipe (1) and a scaffold (13), wherein a lower extension pipe (3) is fixedly provided below one end of the main support pipe (1), characterized in that, Also includes: A bent support pipe (6) is fixedly installed at one end below the other end of the main pipe (1), and the other end of the lower extension pipe (3) is fixedly connected to the other end of the bent support pipe (6). An upper hook assembly (8) is fixedly installed at one end of the main pipe (1), and is suspended on the scaffold (13) through the upper hook assembly (8). A lower hook assembly (4) is fixedly installed at the other end of the bent support pipe (6), and the interior of the lower hook assembly (4) is movably engaged with the scaffold (13). An insertion port is provided on the lower hook assembly (4), and a wedge (5) is provided through the insertion port to lock the lower hook assembly (4) onto the scaffold (13). The extension tube (2) is movably installed inside the receiving main tube (1) and can be pulled out. A footboard (14) can be installed on the receiving main tube (1) and the extension tube (2).

2. The telescopic curved pipe support assembly for scaffolding according to claim 1, characterized in that: The upper hook assembly (8) has a U-shaped hook structure with the opening facing downwards, and can be directly fastened to the scaffold (13). The upper hook assembly (8) is integrally formed from S315MC stamped steel plate, with an inner arc of R15mm and an outer dimension of 62±1mm×52.5±1mm. The lower hook assembly (4) is formed by bending S235JR stamped steel plate, with two levels of transition rounded corners of R12mm and R18mm at the bending position, and the main body bending angle is 135 degrees. Both the lower hook assembly (4) and the upper hook assembly (8) have Φ12mm ventilation holes, and the ventilation holes maintain a safe distance from all welded seams without overlapping or covering.

3. The telescopic curved pipe support assembly for scaffolding according to claim 1, characterized in that: A locking hole (9) is provided at the other end of the receiving main pipe (1), and a sliding groove (10) is provided at the bottom of the extension pipe (2) corresponding to the locking hole (9). Rivets (11) are provided in the locking hole (9) and the sliding groove (10) to limit the extension pipe (2), prevent the extension pipe (2) from rotating inside the receiving main pipe (1), causing the pedal (14) to slide, and limit the extension stroke of the extension pipe (2).

4. The telescopic curved pipe support assembly for scaffolding according to claim 1, characterized in that: The other end of the extension tube (2) is fixedly welded with a baffle (12), and the height of the upper surface of the baffle (12) is higher than the upper surface of the pedal (14).

5. The telescopic curved pipe support assembly for scaffolding according to claim 1, characterized in that: The wedge (5) is a tapered inclined surface structure with an inclination angle of 6.9 degrees. Two sets of positioning holes are provided on the wedge (5) to squeeze and eliminate the gap between the wedge (5) and the scaffold (13).

6. The telescopic curved pipe support assembly for scaffolding according to claim 1, characterized in that: The bent support pipe (6) is an integral 97-degree bend pipe, and a reinforcing sleeve (7) is welded to the outer wall of the bend section.

7. The telescopic curved pipe support assembly for scaffolding according to claim 1, characterized in that: The surface of the lower hook assembly (4) is centrifugally galvanized, and other metal components are uniformly hot-dip galvanized as a whole, with a galvanized layer thickness of 70-120μm. All components need to be pickled and degreased before galvanizing in order to improve the adhesion of the coating.

8. The telescopic curved pipe support assembly for scaffolding according to claim 1, characterized in that: The receiving main pipe (1) is provided with a limit stop (15). When a pedal (14) is separately installed on the receiving main pipe (1), the limit stop (15) can limit it.

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