Liftable scaffold and construction method thereof

Abstract

The present invention relates to a liftable scaffolding, comprising a horizontal workbench and a support frame mounted on both sides of the workbench, wherein the support frame comprises two longitudinal rods, and is characterized in that a first sliding member is provided on the support frame, the first sliding member is slidably mounted on the longitudinal rods, a raised support block is provided on the upper end of the first sliding member, the four corners of the horizontal workbench are buckled onto the support block, a raised card block is provided on the support block, a card slot for fitting the card block is provided at the bottom of the horizontal workbench, and the horizontal workbench is mounted on the support block by buckling the card block into the card slot; the present invention realizes the lifting and lowering of the workbench through a single power source, ensures synchronization consistency, and is convenient for operators to operate while standing on the workbench. By utilizing the characteristics of the anti-fall mechanism, it serves as a climbing fulcrum in the locked state, so that the workbench can be stably lifted and lowered when the power device is activated, thereby improving operational efficiency. The lifting structure of the workbench can achieve cross-layer arrival or unloading, which is very convenient for the erection of multi-layer scaffolding.

Description

Technical Field

[0001] The present invention relates to the technical field of scaffolding, in particular to a liftable scaffolding. Background Art

[0002] As a construction tool, scaffolding is designed to provide workers with a safe platform, making the construction process more efficient and safer. Various types of scaffolding have appeared on the market, such as traditional erection scaffolding, mobile scaffolding, and liftable scaffolding.

[0003] In traditional erection scaffolding, components such as support legs and beams need to be installed one by one, making the construction process cumbersome and posing safety risks. Mobile scaffolding can be moved at any time by installing casters, but its stability is generally poor and it is only suitable for smaller construction areas. A liftable scaffold is a scaffold with a lifting function that can be adjusted in height as needed, improving construction efficiency. However, the overall structure of a liftable scaffold is usually heavier than traditional erection scaffolding and mobile scaffolding. This is mainly because its lifting mechanism and support structure cannot be easily disassembled.

[0004] First, the lifting mechanism of a retractable scaffolding consists of components such as lifting rods, ratchet bars, gears, and motors, all of which need to be connected together via connectors, forming a complex lifting mechanism. Second, a retractable scaffolding requires stabilizers and fixings on the base frame to improve its stability. These additional structures also increase the weight and complexity of the entire scaffolding.

[0005] Chinese patent CN205804909U discloses a liftable scaffold, which includes a base frame and a ladder arranged on the top of the base frame. The base frame is composed of four vertical support legs and pull rods connected between the four support legs. Among them, a lifting rod is provided inside the support legs, and the top of the lifting rod is connected to the ladder and supports the ladder at the top of the base frame. A ratchet bar is provided on the ladder, and a gear meshing with the ratchet bar and a motor for driving the gear to rotate are provided on the base frame. The motor drives the gear to rotate, thereby driving the ratchet bar to move, so that the ladder is raised and lowered on the base frame. However, the scaffold is bulky as a whole, and the platform that can be raised and lowered is limited to the current layer to which it belongs, and it cannot be raised and lowered across multiple layers, so its construction height range is limited. This is because the structural design of the scaffold can only be raised and lowered on the same horizontal plane, and cannot be raised and lowered across different horizontal planes. To meet the needs of multi-layer combined superimposed construction, it is necessary to use other types of scaffolds or combine them with other devices.

[0006] In addition to limiting the construction height range, existing liftable scaffolding presents another problem: for construction of two or more stories, the platform must be lifted from the ground for installation, requiring at least two people to operate. This is labor-intensive and poses safety risks. Furthermore, due to the high construction heights of two or more stories, the operation process presents significant safety risks. Therefore, further research and development and improvement of the scaffolding's structural design are needed to improve its stability, safety, and ease of operation to meet the needs of construction at different heights. Summary of the Invention

[0007] In view of the above problems, the present invention provides a liftable scaffolding, which is easy to disassemble in structure and its working table can automatically reach across floors.

[0008] The object of the present invention is achieved through the following technical solutions: a liftable scaffold, comprising a horizontal workbench and support frames mounted on both sides of the workbench, the support frames comprising two longitudinal rods, characterized in that a first sliding member is provided on the support frame, the first sliding member is slidably mounted on the longitudinal rods, a raised support block is provided on the upper end of the first sliding member, the four corners of the horizontal workbench are buckled on the support blocks, the support blocks are provided with raised card blocks, the bottom of the horizontal workbench is provided with a card slot adapted to the card block, and the horizontal workbench is mounted on the support block by buckling the card block into the card slot;

[0009] The horizontal workbench slides up and down on the longitudinal rod through the first sliding member to achieve lifting.

[0010] Preferably, a second sliding member is further provided on the longitudinal rod, and the second sliding member is located below the first sliding member. A transmission support assembly is provided at the lower end of the horizontal workbench, and the transmission support assembly includes two pairs of frames and transmission rods. The frames are respectively located at both ends of the transmission rod and are symmetrical with the transmission rod as the center. A power device is provided on the horizontal workbench, and one end of the transmission rod is connected to the power device, which drives the transmission rod to rotate. The transmission rod is provided with a first threaded portion and a second threaded portion with opposite thread directions, and the first threaded portion and the second threaded portion are respectively provided with a first moving block and a second moving block, and the first moving block and the second moving block move on the first threaded portion and the second threaded portion by thread rotation.

[0011] Preferably, the frame includes support rods on both sides and connecting rods for connecting the two support rods. The two pairs of frames pass through the first moving block and the second moving block respectively through the connecting rods, so that the frames are connected to the first moving block and the second moving block respectively, and the support rods are detachably hinged to the second sliding member.

[0012] Preferably, slide grooves are provided on both sides of the horizontal workbench, both ends of the connecting rod protrude and are located in the slide grooves, and limit blocks are provided at both ends of the connecting rod, and the outer diameter of the limit blocks is larger than the slide grooves.

[0013] Preferably, the power unit includes a motor, a transmission shaft, a fixing part and a housing. The housing is located on a horizontal workbench, the motor is installed in the housing, the motor and the transmission shaft are connected and transmitted by a transmission belt, and the transmission shaft extends to the lower end of the horizontal workbench and is connected to the end of the transmission rod.

[0014] Preferably, the fixing member is installed at the lower end of the horizontal workbench, the transmission rod and the transmission shaft pass through the fixing member, and the first sliding member is provided with an anti-fall locking mechanism.

[0015] Preferably, each anti-fall locking mechanism includes a locking seat, a locking cover and a claw in the locking seat, the locking cover covers the locking seat, and a ratchet bar with the same length as the longitudinal rod is provided on the outward side of each longitudinal rod, and the claw is adapted to the ratchet bar.

[0016] Preferably, the claw is hinged on the locking base, a spring is provided between the locking cover and the claw, a pressing block and a toggle bar are provided between the locking cover and the locking base, the lower end of the toggle bar is fixedly mounted on the claw, and the upper end abuts against the pressing block. A knob is provided at the front end of the locking cover, the knob abuts against the pressing block, a button is further provided at the upper end of the locking cover, and a protrusion adapted to the button is provided on the pressing block, the protrusion is inclined, and the lower end of the button is also inclined.

[0017] Preferably, an adjusting button is provided on the second sliding member, and the second sliding member can also slide on the longitudinal rod and be locked by the adjusting button.

[0018] The present invention also provides a construction method for the scaffold, comprising the following steps:

[0019] S1. Build scaffolding

[0020] a. Preparation of supporting parts: prepare corresponding supporting parts according to the number of layers of scaffolding required;

[0021] b. Build the first scaffolding layer: Install pulleys on each of the four longitudinal rods and place them at the four corners of the horizontal workbench. Next, install the first and second sliders onto the longitudinal rods and secure the second slider with the adjustment knob. Next, install the transmission support assembly at the bottom of the horizontal workbench and connect it to the first slider. Finally, install the power unit and connect it to the transmission rods.

[0022] c. Build the second and subsequent scaffolding floors: Extend the four vertical rods to the desired height and set up a horizontal workbench at the intersection of each floor. Install the first and second slides, securing the second slide with the adjustment knob. At each intersection, cover the intersection of the upper and lower floors simultaneously, and lock the second slide.

[0023] d. Install the anti-fall locking mechanism: Install a ratchet bar on each longitudinal rod and connect the anti-fall locking mechanism to the ratchet bar through the claws;

[0024] e. Install guardrails: Install guardrails on both sides of each workbench;

[0025] f. Commissioning and Inspection: After the scaffolding is erected, all connecting parts, locking mechanisms, and power units are inspected to ensure that all parts are securely connected and functioning properly. The scaffolding is then tested to ensure it can be raised and lowered safely and stably.

[0026] S2. Adjust the horizontal working table up and down

[0027] Adjustment of the horizontal workbench: After all components are assembled, perform the raising operation:

[0028] a. Make sure the adjustment button is in the loose state;

[0029] b start the power unit and rotate, so that the first moving block and the second moving block are moved toward the center, when the second sliding member moves close to the bottom of the first sliding member, stop the power unit, and lock the second sliding member;

[0030] c. Restart the power unit and rotate it in the opposite direction, causing the first and second movable blocks to move outwards, respectively. The horizontal workbench is pushed upward as a whole via the support rods. When the desired height is reached, the power unit is stopped and the second slide is locked, completing a single ascent.

[0031] The horizontal workbench is adjusted to lower after all components are assembled:

[0032] a. The adjustment button is in the locked state and the anti-fall locking mechanism is unlocked;

[0033] b. Start the power unit and rotate it, causing the first and second movable blocks to move toward the center respectively. The support angle of the support rod changes from vertical to horizontal, thereby driving the horizontal workbench to descend. When it descends to the preset position, the power unit is stopped, and the anti-fall locking mechanism is adjusted to the effective state, allowing the horizontal workbench to stop stably.

[0034] c. Release the adjustment knob, then restart the power unit and rotate it in the opposite direction. This will cause the first and second movable blocks to move outwards, respectively. The support angle of the support rod will shift from horizontal to vertical, and the second sliding member will slide down during this process. Repeat the above steps to gradually lower the horizontal workbench.

[0035] In summary, the present invention has the following advantages compared with the prior art:

[0036] 1. The workbench is raised and lowered using a single power source, ensuring synchronization and consistency, making it convenient for operators to operate while standing on the workbench. Utilizing the anti-fall mechanism, which serves as a climbing fulcrum in the locked state, the workbench can be raised and lowered stably when the power unit is activated, improving operational efficiency.

[0037] 2. The lifting structure of the workbench can achieve cross-level access or unloading, which is very convenient for the erection of multi-layer scaffolding. Through the combination of the power device and the adjustment knob, knob or button, the workbench can be leaped step by step, avoiding the trouble of delivering from the ground.

[0038] 3. Each component is the same as the quick-disassembly scaffolding on the market, easy to disassemble, convenient for transportation and storage.

[0039] 4. Regarding safety, the first sliding member is equipped with an anti-fall mechanism that is locked in place under normal conditions, preventing it from sliding down and ensuring the safety of the user standing on the workbench. The locking of the support assembly and the buckling of the four corners of the workbench to the first sliding member further enhance the stability of the workbench, ensuring the safety and a good user experience.

[0040] In short, the present invention achieves stability, safety and convenience in lifting and lowering the work platform through ingenious design, and improves the efficiency and safety factor of scaffolding operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 The present invention is a three-dimensional Figure 1 .

[0042] Figure 2 It is an exploded view of the present invention.

[0043] Figure 3 The present invention is a three-dimensional Figure 2 .

[0044] Figure 4 It is an exploded view of the power device of the present invention.

[0045] Figure 5 It is a schematic diagram of the anti-fall mechanism of the present invention.

[0046] Figure 6 for Figure 2 A partial enlarged view of point A in the middle.

[0047] Figure numerals: 1. horizontal workbench, 2. support frame, 3. longitudinal bar, 4. cross bar, 5. first sliding member, 6. second sliding member, 7. support block, 8. block, 9. slot, 10. transmission support assembly, 11. frame, 12. transmission rod, 13. power device, 14. first threaded portion, 15. second threaded portion, 16. first moving block, 17. second moving block, 18. support rod, 19. connecting rod, 20. motor, 21. transmission shaft, 22. fixing member, 23. anti-fall locking mechanism, 24. ratchet bar, 25. locking block, 26. locking cover, 27. claw, 28. spring, 29. pressing block, 30. pressing bar, 31. knob, 32. button, 33. protrusion, 34. adjusting button, 35. guardrail, 37. slide groove, 38. limit block, 39. shell. DETAILED DESCRIPTION

[0048] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0049] Example 1

[0050] like Figure 1-2 As shown, a liftable scaffold comprises a horizontal workbench 1 and a support frame 2 installed on both sides of the workbench. The support frame 2 comprises two longitudinal bars 3 and a transverse bar 4 installed between the two longitudinal bars 3. A first sliding member 5 is provided on the support frame 2, and the first sliding member 5 is slidably installed on the longitudinal bar 3. A raised support block 7 is provided at the upper end of the first sliding member 5, and the four corners of the horizontal workbench 1 are buckled onto the support block 7. A raised clamping block 8 is provided on the support block 7, and a slot 9 for fitting the clamping block 8 is provided at the bottom of the horizontal workbench 1. The horizontal workbench 1 is installed on the support block 7 by buckling the clamping block 8 into the slot 9, which can effectively reduce the possibility of the workbench falling off during use and also facilitate the disassembly of the horizontal workbench 1. The top and bottom of the longitudinal bar 3 can fit tightly together, thereby cooperating to complete the continuous multi-layer erection of the scaffold upward.

[0051] The horizontal workbench 1 slides up and down on the longitudinal rod 3 through the first sliding member 5 to achieve lifting. The longitudinal rod 3 is also provided with a second sliding member 6, and the second sliding member 6 is located below the first sliding member 5. A transmission support assembly 10 is provided at the lower end of the horizontal workbench 1. The transmission support assembly 10 includes two pairs of frames 11 and a transmission rod 12. The frames 11 are respectively located at both ends of the transmission rod 12 and are symmetrical with the transmission rod 12 as the center. A power device 13 is provided on the horizontal workbench 1, and the first sliding member 5 is lifted and lowered through the power device 13 and the transmission support assembly 10. One end of the transmission rod 12 is connected to the power device 13, and the power device 13 drives the transmission rod 12 to rotate. The transmission rod 12 is provided with a first threaded portion 14 and a second threaded portion 15 with opposite thread directions. The first threaded portion 14 and the second threaded portion 15 are respectively provided with a first moving block 16 and a second moving block 17. The first moving block 16 and the second moving block 17 move on the first threaded portion 14 and the second threaded portion 15 by thread rotation.

[0052] The frame 11 includes support rods 18 on either side and a connecting rod 19 connecting the two support rods 18. The connecting rods 19 extend through the first and second movable blocks 16, 17, respectively, connecting the two pairs of frames 11 to the first and second movable blocks 16, 17, respectively. The support rods 18 are detachably hinged to the second sliding member 6. When the second sliding member 6 is fixed, the power unit 13 rotates the transmission rod 12. Because the first and second threaded portions 14, 15 have opposite thread directions, the first and second movable blocks 16, 17 move in opposite directions. When the first movable block 16 moves leftward, the second movable block 17 moves rightward, causing the support rod 18 to rotate upward at its hinge point. This causes the transmission rod 12 to rise, driving the first sliding member 5 upward, thereby raising the horizontal workbench 1. When the first movable block 16 moves rightward, the second movable block 17 moves leftward, causing the support rod 18 to rotate downward at its hinge point. This causes the transmission rod 12 to descend, driving the first sliding member 5 downward, thereby lowering the horizontal workbench 1.

[0053] The horizontal work platform 1 is provided with chute grooves 37 on both sides, and the connecting rod 19 has protruding ends that are located within the chute grooves 37. During the raising and lowering of the horizontal work platform 1, the connecting rod 19 moves within the chute grooves 37. In addition, the connecting rod 19 is provided with stoppers 38 at both ends. The outer diameter of the stoppers 38 is larger than that of the chute grooves 37, which further stabilizes the horizontal work platform 1 and improves its stability.

[0054] The power unit 13 comprises a motor 20, a transmission shaft 21, a fixing member 22, and a housing 39. Housing 39 is positioned on the horizontal workbench 1, and the motor 20 is mounted within it. The motor 20 and transmission shaft 21 are connected by a transmission belt. The transmission shaft 21 extends to the lower end of the horizontal workbench 1 and is in driving connection with the end of the transmission rod 12. When the motor 20 rotates, power is transmitted to the transmission rod 12 via the transmission shaft 21, causing the transmission rod 12 to rotate, thereby raising and lowering the horizontal workbench 1.

[0055] A fixing member 22 is mounted at the lower end of the horizontal workbench 1, through which the transmission rod 12 and transmission shaft 21 pass. This effectively protects the transmission mechanism, preventing foreign matter from falling into it during operation, ensuring the safety and reliability of the equipment. The first sliding member 5 is equipped with an anti-fall locking mechanism 23, which locks the first sliding member 5 to prevent the horizontal workbench 1 from accidentally falling during use.

[0056] Each anti-fall locking mechanism 23 includes a locking base 25, a locking cover 26, and a pawl 27 within the locking base 25. The locking cover 26 covers the locking base 25. A ratchet bar 24, the same length as the longitudinal bar 3, is provided on the outward side of each longitudinal rod 3. The pawl 27 fits snugly within the ratchet bar 24. The anti-fall locking mechanism 23 is engaged with the ratchet bar 24 via the pawl 27. Under normal conditions, the first slider 5 can ascend but not descend, ensuring the user's safety while working.

[0057] The claw 27 is hinged on the locking seat 25, and a spring 28 is provided between the locking cover 26 and the claw 27. A pressing block 29 and a toggle bar 30 are provided between the locking cover 26 and the locking seat 25. The lower end of the toggle bar 30 is fixedly mounted on the claw 27, and the upper end abuts against the pressing block 29. By triggering the pressing block 29 to move toward the abutting side, the lower end of the claw 27 is opened, thereby releasing the engagement between the claw 27 and the ratchet bar 24. At this time, the horizontal workbench 1 can be raised or lowered by the cooperation of the transmission support assembly 10 and the power device 13. Under normal conditions, the anti-fall locking mechanism 23 is in a locked state, and the claw 27 is squeezed by the spring 28 so that the claw 27 remains engaged with the ratchet bar.

[0058] A knob 31 is provided at the front end of the locking cover 26, and the knob 31 abuts against the pressing block 29. The user can screw in the knob 31, thereby pushing the pressing block 29 inward and releasing the limit of the anti-fall locking mechanism 23. A button 32 is also provided at the upper end of the locking cover 26, and a protrusion 33 that adapts to the button is provided on the pressing block 29. The protrusion 33 is inclined, and the lower end of the button 32 is also inclined. By pressing the button 32, the inclined surface at the lower end of the button 32 pushes the inclined surface on the protrusion 33, thereby pushing the pressing block 29 inward and releasing the limit of the anti-fall locking mechanism 23. These two ways of releasing the limit make operation more convenient: the user can quickly operate by pressing the button 32 on the workbench, and can choose one of the ways to release the limit according to personal preference on the ground.

[0059] The second slide 6 is provided with an adjustment button 34. The second slide 6 can also slide on the longitudinal rod 3 and be locked by the adjustment button 34. If the second slide 6 is slid to a higher position, the maximum rise distance of the horizontal work platform 1 will be increased; if the second slide 6 is slid to a lower position, the maximum rise distance of the horizontal work platform 1 will also be reduced, thereby meeting the needs of users at different heights.

[0060] The workbench of the present invention can replace each adjustment button 34 with an electric cylinder lock or a motor lock, so that the operator can stand alone on the workbench 1 to operate the lifting, which can greatly improve labor efficiency.

[0061] Guardrails 35 are provided on both sides of the workbench 1 to provide protection for the user and reduce the situation of falling from the workbench 1 during work. The guardrails 35 are inserted into the first sliding member 5 for easy removal.

[0062] A pulley is provided at the bottom of the longitudinal rod 3, which is convenient for users to move to different positions for work. This design makes the workbench not only have a safety protection function, but also can be easily adjusted to meet the needs of users in different scenarios.

[0063] The construction method of the scaffolding, refer to all the attached drawings:

[0064] 1. Build scaffolding

[0065] 1. Preparation of accessories. Prepare the corresponding accessories according to the number of layers of scaffolding required. Assuming that three layers are to be erected, three sets of all accessories are required. At least three sets of horizontal workbenches 1 are required. This is because a horizontal workbench 1 must be set up at the junction of each layer for bridging, that is, the first sliding member 5 covers the junction of the upper and lower layers at the same time, and the second sliding member 6 is locked to achieve the effect of stabilizing the whole.

[0066] 2. Build the first scaffolding layer: Install pulleys 36 on each of the four longitudinal rods 3 and place them at the four corners of the workbench 1. Next, install the first and second sliders 5 and 6 onto the longitudinal rods 3, securing the second slider 6 with the adjustment knob 34. Next, install the transmission support assembly 10 at the lower end of the horizontal workbench 1 and connect it to the first slider 5. Finally, install the power unit 13 and connect it to the transmission rod 12.

[0067] 3. Build the second and third scaffolding layers: Extend the four longitudinal rods 3 to the desired height and set up a horizontal workbench 1 at the intersection of each layer. Install the first and second slides 5 and 6, securing the second slides 6 with the adjustment knobs 34. At each intersection, the intersection of the upper and lower layers is covered simultaneously. The second slides 6 are locked to stabilize the entire structure.

[0068] 4. Install the anti-fall locking mechanism 23: Install a ratchet bar 24 on each longitudinal rod 3, and clamp the anti-fall locking mechanism 23 to the ratchet bar 24 through the claw 27 to ensure that the first sliding member 5 can rise but cannot fall, ensuring the safety of the user.

[0069] 5. Install guardrails 35: Install guardrails 35 on both sides of each workbench 1 to provide protection for users and reduce the possibility of falling from the workbench 1 during work. Ensure that the guardrails 35 are firmly inserted into the first sliding member 5.

[0070] 6. Commissioning and inspection: After the scaffolding is erected, all connecting parts, locking mechanisms and power units are inspected to ensure that all parts are firmly connected and functioning properly. Then, the scaffolding is tested to ensure that it can be raised and lowered safely and stably.

[0071] 2. Adjust the horizontal workbench up and down

[0072] 1. Adjust the horizontal workbench: After all components are assembled, perform the raising operation:

[0073] a. Ensure that the adjustment button 34 is in the released state. At this time, the anti-fall locking mechanism 23 does not need to be operated, ie, it is in an effective anti-fall state. This can be done by pressing the button 32 or rotating the knob 31 to separate the claw 27 from the ratchet bar 24;

[0074] b. Start the power unit 13 and rotate it, causing the first movable block 16 and the second movable block 17 to move toward the center. This causes the support rod 18 to drag the second slider 6 upward. When the second slider 6 approaches the bottom of the first slider 5, stop the power unit 13 and lock the second slider 6.

[0075] c. Restart the power unit 13 and rotate it in the opposite direction, causing the first and second movable blocks 16 and 17 to move outward. Using the support rods 18, the entire horizontal work platform 1 is pushed upward. When the desired height is reached, stop the power unit 13 and lock the second slide 6. This completes the single-lift operation.

[0076] 2. Adjust the lowering of the horizontal workbench. After all components are assembled, perform the lowering operation:

[0077] a. The adjustment button 34 is in the locked state, the anti-fall locking mechanism 23 is unlocked, ie, in an invalid anti-fall state;

[0078] b. Start the power unit 13 and rotate it, causing the first movable block 16 and the second movable block 17 to move toward the center. Because the anti-fall locking mechanism 23 is in the disabled state, the support angle of the support rod 18 changes from vertical to horizontal, thereby driving the horizontal work platform 1 to descend. When it descends to the preset position, stop the power unit 13 and adjust the anti-fall locking mechanism 23 to the enabled state, allowing the horizontal work platform 1 to stabilize.

[0079] c. Release the adjustment knob 34, then restart the power unit 13 and rotate it in the opposite direction, causing the first and second movable blocks 16 and 17 to move outward. The support angle of the support rod 18 will shift from horizontal to vertical, and the second slide 6 will slide downward in this process. Repeat these steps to gradually lower the horizontal workbench.

[0080] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A liftable scaffold comprising a horizontal workbench (1) and support frames (2) mounted on both sides of the workbench, wherein the support frames (2) comprise two longitudinal rods (3), characterized in that: A first sliding member (5) is provided on the support frame (2), and the first sliding member (5) is slidably mounted on the longitudinal rod (3). A raised supporting block (7) is provided on the upper end of the first sliding member (5). The four corners of the horizontal workbench (1) are buckled on the supporting block (7). A raised clamping block (8) is provided on the supporting block (7). A clamping slot (9) adapted to the clamping block (8) is provided at the bottom of the horizontal workbench (1). The horizontal workbench (1) is mounted on the supporting block (7) by buckling the clamping block (8) into the clamping slot (9). The horizontal workbench (1) slides up and down on the longitudinal rod (3) via a first sliding member (5) to achieve lifting; The longitudinal rod (3) is further provided with a second sliding member (6), the second sliding member (6) is located below the first sliding member (5), a transmission support assembly (10) is provided at the lower end of the horizontal workbench (1), the transmission support assembly (10) comprises two pairs of frames (11) and a transmission rod (12), the frames (11) are respectively located at both ends of the transmission rod (12) and are symmetrical with the transmission rod (12) as the center, a power device (13) is provided on the horizontal workbench (1), one end of the transmission rod (12) is connected to the power device (13), the power device (13) drives the transmission rod (12) to rotate, the transmission rod (12) is provided with a first threaded portion (14) and a second threaded portion (15) with opposite thread directions, the first threaded portion (14) and the second threaded portion (15) are respectively provided with a first moving block (16) and a second moving block (17), the first moving block (16) and the second moving block (17) move on the first threaded portion (14) and the second threaded portion (15) by thread rotation; The frame (11) includes support rods (18) on both sides and a connecting rod (19) for connecting the two support rods (18). The two pairs of frames (11) pass through the first moving block (16) and the second moving block (17) respectively through the connecting rod (19), so that the frames (11) are connected to the first moving block (16) and the second moving block (17) respectively. The support rods (18) are detachably hinged on the second sliding member (6); The first sliding member (5) is provided with an anti-fall locking mechanism (23); The second sliding member (6) is provided with an adjusting button (34), and the second sliding member (6) can also slide on the longitudinal rod (3) and be locked by the adjusting button (34); The power device (13) can rotate in the forward or reverse direction after being started.

2. The scaffold according to claim 1, characterized in that Slide grooves (37) are provided on both sides of the horizontal workbench (1), and both ends of the connecting rod (19) protrude and are located in the slide grooves (37). Both ends of the connecting rod (19) are provided with limit blocks (38), and the outer diameter of the limit blocks (38) is larger than that of the slide grooves (37).

3. The scaffold according to claim 1, characterized in that The power device (13) comprises a motor (20), a transmission shaft (21), a fixing member (22) and a housing (39), wherein the housing (39) is located on the horizontal workbench (1), the motor (20) is installed in the housing (39), the motor (20) and the transmission shaft (21) are connected and driven by a transmission belt, and the transmission shaft (21) extends to the lower end of the horizontal workbench (1) and is in transmission connection with the end of the transmission rod (12).

4. The scaffold according to claim 3, characterized in that The fixing member (22) is mounted on the lower end of the horizontal workbench (1), and the transmission rod (12) and the transmission shaft (21) pass through the fixing member (22).

5. The scaffold according to claim 4, characterized in that Each of the anti-fall locking mechanisms (23) comprises a locking seat (25), a locking cover (26) and a claw (27) in the locking seat (25), wherein the locking cover (26) covers the locking seat (25), and a ratchet bar (24) having the same length as the longitudinal bar (3) is provided on the outward side of each longitudinal bar (3), and the claw (27) is adapted to fit the ratchet bar (24).

6. The scaffold according to claim 5, characterized in that The claw (27) is hinged on the locking seat (25), a spring (28) is provided between the locking cover (26) and the claw (27), a pressing block (29) and a toggle bar (30) are provided between the locking cover (26) and the locking seat (25), the lower end of the toggle bar (30) is fixedly mounted on the claw (27), and the upper end abuts on the pressing block (29), a knob (31) is provided at the front end of the locking cover (26), the knob (31) abuts on the pressing block (29), a button (32) is further provided at the upper end of the locking cover (26), a convex block (33) adapted to the button is provided on the pressing block (29), the convex block (33) is inclined, and the lower end of the button (32) is also inclined.

7. A construction method using the scaffolding according to claim 6, characterized in that: The steps are: S1. Build scaffolding a. Preparation of supporting parts: prepare corresponding supporting parts according to the number of layers of scaffolding required; b. Build the first layer of scaffolding: Install pulleys (36) on the four longitudinal rods (3) and place them at the four corners of the horizontal workbench (1). Then, install the first slide (5) and the second slide (6) on the longitudinal rods (3). Use the adjustment button (34) to fix the second slide (6). Next, install the transmission support assembly (10) at the lower end of the horizontal workbench (1) and connect the first slide (5). Finally, install the power unit (13) and connect it to the transmission rod (12); c. Build the second and higher scaffolding: Extend the four longitudinal rods (3) to a predetermined height, and set a horizontal workbench (1) at the intersection of each layer, install the first slide (5) and the second slide (6), and fix the second slide (6) with the adjustment button (34). At each intersection, the intersection of the upper and lower layers is covered at the same time, and the second slide (6) is locked; d. Install the anti-fall locking mechanism (23): Install the ratchet bar (24) on each longitudinal rod (3), and connect the anti-fall locking mechanism (23) to the ratchet bar (24) through the claw (27); e. Installing guardrails (35): Install guardrails (35) on both sides of each horizontal workbench (1); f. Commissioning and inspection: After the scaffolding is erected, all connecting parts, locking mechanisms and power devices are inspected to ensure that all parts are firmly connected and operating normally. Then, the scaffolding is tested to ensure that it can be raised and lowered safely and stably; S2. Adjust the horizontal working table up and down Adjustment of the horizontal workbench: After all components are assembled, perform the raising operation: a. Make sure the adjustment knob (34) is in the loose state; b. Starting the power device (13) and rotating it so that the first movable block (16) and the second movable block (17) respectively move toward the center. When the second sliding member (6) moves close to the bottom of the first sliding member (5), the power device (13) is stopped and the second sliding member (6) is locked. c. Restart the power unit (13) and rotate it in the opposite direction, so that the first moving block (16) and the second moving block (17) move outwards respectively, and push the horizontal workbench (1) upward as a whole through the support rod (18). When the appropriate height is reached, stop the power unit (13) and lock the second sliding member (6), thus completing the single lifting operation; The horizontal workbench is adjusted to lower after all components are assembled: a. The adjusting knob (34) is in the locked state and the anti-fall locking mechanism (23) is unlocked; b. Start the power unit (13) and rotate it, so that the first movable block (16) and the second movable block (17) move toward the center respectively, and the support angle of the support rod (18) changes from vertical to horizontal, thereby driving the horizontal workbench to descend. When it descends to the preset position, stop the power unit (13), and adjust the anti-fall locking mechanism (23) to the effective state, so that the horizontal workbench (1) stops stably; c. Adjust the adjustment knob (34) to the loose state, then restart the power device (13) and rotate it in the opposite direction, so that the first moving block (16) and the second moving block (17) move outward respectively, and the support angle of the support rod (18) changes from horizontal to vertical. The second sliding member (6) slides down during this process. Repeat the above-mentioned lowering operation to gradually complete the lowering of the horizontal workbench.

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