A scaffolding with adjustable platform height and an adjustment method

Abstract

The present invention relates to the technical field of scaffolding, and specifically to a scaffolding with adjustable platform height and an adjustment method. It includes a first platform, a second platform, two ladders, a control component, a telescopic component, and a safety component. Four first support columns are vertically symmetrically arranged on both sides of the first platform, and a cross brace is connected by bolts between two first support columns on one side. The control component is used to quickly control the insertion of the second support column at the upper end of the first support column, avoiding independent adjustment of all four first support columns, achieving the purpose of the same-side height being consistent, facilitating the subsequent leveling of the second platform and the operation efficiency. Then, under the action of the safety component, the height of the ladder is extended and the movement form of the second platform is safely protected, and at the same time, the self-rotation of the control component is avoided, improving the safety of the scaffolding, and avoiding the safety problem of unauthorized modification caused by workers adjusting the height of the second platform.

Description

Technical Field

[0001] The present invention relates to the technical field of scaffolding, and specifically relates to a scaffolding with adjustable platform height and an adjustment method. Background Art

[0002] A scaffolding is a working platform assembled through a frame structure, mainly including a frame body, a platform, and a ladder. Most scaffolding is erected with a fixed frame structure. When it is necessary to adjust the height of the upper platform, it is often necessary to disassemble and replace the support structure corresponding to the height, resulting in workers making unauthorized modifications to the frame body.

[0003] Furthermore, it may occur that the replacement and assembly strength is insufficient, causing safety accidents. When the adjustable scaffolding in the prior art is in use, it is mostly adjusted and locked through a telescopic leg structure. When performing the adjustment operation, multiple legs are adjusted separately, and the operation is relatively cumbersome. Moreover, after the adjustment operation is completed, the top platform may have a poor levelness, which may bring certain safety hazards to the construction operation, with poor safety and inconvenient adjustment operation. Summary of the Invention

[0004] The purpose of the present invention is to provide a scaffolding with adjustable platform height and an adjustment method to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A scaffolding with adjustable platform height, the scaffolding with adjustable platform height includes;

[0006] A first platform, on both sides of the first platform, four first support columns are symmetrically arranged vertically, and a cross brace is connected between two first support columns on one side through bolts;

[0007] A second platform, the second platform is horizontally arranged directly above the first platform. On both sides of the second platform, four second support columns are symmetrically arranged vertically. The four second support columns are respectively inserted and arranged at the upper ends of the first support columns through an adjustment component, and the adjustment component includes an adjustment box and an insertion rod;

[0008] Two ladders, the two ladders are symmetrically arranged vertically on both sides between the first platform and the second platform;

[0009] A control component, the control component is horizontally inserted into the ladder, and the control component includes an adjustment wheel and two control shafts;

[0010] A telescopic component, the telescopic component is arranged at the upper end of the ladder, and the telescopic component includes two telescopic boxes;

[0011] A safety component, the installation component is arranged at the upper end of the ladder, and the safety component includes a support cylinder and a safety box.

[0012] Preferably, receiving grooves are formed at the upper ends of the first support columns, the plugging rods are integrally and vertically arranged at the lower ends of the second support columns, the plugging rods are vertically and movably inserted into the receiving grooves, and the adjusting boxes are welded on the first support columns on one side of the receiving grooves.

[0013] Preferably, worm gears are vertically and movably inserted into the adjusting boxes through central shafts, strip-shaped grooves are formed through one sides of the receiving grooves close to the worm gears, tooth plates are integrally arranged on one sides of the plugging rods, the tooth plates penetrate and are inserted into the strip-shaped grooves, a plurality of teeth are symmetrically arranged on one side of each tooth plate, and the teeth on one side of each worm gear are meshed with the teeth on one side of the corresponding tooth plate.

[0014] Preferably, two bearing sleeves are horizontally and symmetrically arranged on both sides of the upper end of the ladder, one sides of two control shafts are respectively inserted into the bearing sleeves through bearings, a mounting plate is horizontally arranged on one side of the adjusting box, a bearing plate is vertically arranged at the lower end of the mounting plate through a bolt column, one sides of the control shafts are inserted into the bearing plate through bearings, worms are integrally arranged on one sides of the control shafts penetrating through the bearing plate, and one side of each worm is meshed with the corresponding worm gear.

[0015] Preferably, an adjusting wheel is vertically arranged between two adjacent control shafts, docking sleeves are horizontally arranged at the centers of both sides of the adjusting wheel, rhombic grooves are formed in one sides of the docking sleeves, rhombic inserting rods are arranged on one sides of the control shafts, and the rhombic inserting rods of the two control shafts are respectively inserted into the two rhombic grooves.

[0016] Preferably, a plurality of footrests are horizontally and evenly arranged on the ladder, a support cylinder is vertically welded on the upper end of the footrest close to the adjusting wheel, a safety box is integrally and horizontally arranged on the upper end of the support cylinder, welding boxes are horizontally welded between both sides of the safety box and the ladder, a first moving groove is formed in the safety box, a second moving groove is formed through the support cylinder at the lower end of the moving groove, a pushing block is horizontally arranged in the first moving groove, a pushing column is vertically arranged at the center of the lower end of the pushing block, the pushing column is vertically inserted into the second moving groove, a control screw rod is vertically inserted into the first moving groove through a bearing at the upper end of the safety box, an internal thread groove is formed in the upper end of the pushing block, and one side of the control screw rod placed in the first moving groove is inserted into the internal thread groove through threads.

[0017] Preferably, a first spring groove is formed through the first moving groove in the welding box, a moving block is horizontally inserted into the first spring groove, a safety rod is horizontally arranged on one side of the moving block, a partition plate is vertically arranged on one side in the first spring groove, one side of the safety rod penetrates through the partition plate, first springs are sleeved between the partition plate and the moving block on the safety rod, one side of the moving block penetrates and is inserted into the first moving groove and is in contact with one side of the pushing block, and the upper end face of one side of the moving block close to the pushing block is an inclined surface.

[0018] Preferably, the two telescopic boxes are respectively welded to the upper ends of both sides of the ladder. Telescopic grooves are vertically formed through the telescopic boxes. On the lower end of one side of the ladder where the second platform is located, two telescopic rods are symmetrically arranged vertically. The two telescopic rods are respectively inserted vertically into the two telescopic grooves. On one side of the two telescopic rods placed in the telescopic grooves, a number of clamping grooves are symmetrically arranged. One side of the safety rod respectively penetrates through one side of the ladder and is inserted into the telescopic groove, and one side of the safety rod placed in the telescopic groove is inserted into one of the clamping grooves on one side.

[0019] Preferably, a guide plate is horizontally arranged at the lower end of the second movable groove. A limiting rod is vertically and movably inserted through the center of the guide plate. The lower end of the limiting rod movably penetrates through the pedal. Spring plates are horizontally arranged at the lower end of the limiting rod in the second movable groove. Second springs are sleeved on the limiting rod between the spring plate and the guide plate. A number of limiting grooves are symmetrically formed on one side of the outer circumference of the adjusting wheel. The limiting rod penetrates through the lower end of the pedal and is inserted into one of the limiting grooves on one side. The two side surfaces of the lower end of the limiting rod and the two side surfaces in the limiting groove are both inclined surfaces, and the upper end of the limiting rod penetrating through the guide plate is in contact with the lower end of the push column.

[0020] An adjustment method for a scaffolding, which is applied to the above-mentioned scaffolding with adjustable platform height, includes the following steps:

[0021] Step 1: Rotate the control screw to drive the push block and move upward through the thread. Under the resilience of the first spring, the inclined surface side of the movable block retracts into the first movable groove, and under the abutting action, it will not retract excessively. At the same time, the safety rod disengages from the clamping groove.

[0022] Step 2: Rotate the adjusting wheel to drive the two control shafts to rotate, and then drive the worm gear to rotate under the action of the worm.

[0023] Step 3: While the worm gear rotates, under the action of its teeth and the teeth of the tooth plate, the plug rod moves up and down for adjustment, thereby realizing the up and down height change of the second platform and playing an adaptive adjustment role.

[0024] Step 4: After the adjustment is completed, under the mechanical structure of the worm and the worm gear, automatic stabilization is carried out. During this period, as the adjusting wheel rotates, several limiting grooves on the outer circumferential surface are intermittently in contact with the lower end of the limiting rod to limit the rotational movement of the adjusting wheel, thereby realizing the self-positioning of the movement of the control shaft.

[0025] Step 5: During this period, slide up and down along the telescopic box for auxiliary guidance and adaptively extend the length of the ladder to facilitate personnel to climb after the table top is raised.

[0026] Step 6: Finally, turn the control screw to make the push block push the movable block to insert the safety rod into the card slot, limit the movement of the telescopic rod, provide further safety protection for the support of the second platform, prevent safety problems such as overturning caused by the fracture of the adjustment box teeth, and as the push block descends, the push column limits the up and down movement of the limit rod, improving the stability of the adjustment wheel and avoiding the shaking of the adjustment wheel during construction.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] The control component quickly controls the insertion of the second support column at the upper end of the first support column, avoiding the independent adjustment of all four first support columns, achieving the purpose of the same-side height consistency, facilitating the subsequent leveling of the second platform and the operation efficiency. Then, under the action of the safety component, the height of the extended ladder is increased and the movement form of the second platform is safely protected, and at the same time, the self-rotation of the control component is avoided, improving the safety of the scaffolding, and avoiding the safety problems caused by the unauthorized modification by the staff in order to adjust the height of the second platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0030] Figure 2 is a schematic diagram of the connection structure of the second platform of the present invention;

[0031] Figure 3 is a schematic diagram of the connection structure between the control component and the adjustment component of the present invention;

[0032] Figure 4 is a schematic diagram of the control component structure of the present invention;

[0033] Figure 5 is a schematic diagram of a partial cross-section of the structure of the present invention;

[0034] Figure 6 is of the present invention Figure 5 schematic diagram of part A;

[0035] Figure 7 is of the present invention Figure 5 schematic diagram of part B;

[0036] Figure 8 is of the present invention Figure 5 schematic diagram of part C.

[0037] In the figure: first platform 1, first support column 2, second platform 3, second support column 4, scissors brace 5, ladder 6, footrest 601, insertion rod 7, toothed plate 8, adjustment box 9, worm gear 10, mounting plate 11, bearing plate 12, control shaft 13, adjustment wheel 14, docking sleeve 15, support cylinder 16, safety box 17, welding box 18, push block 19, push column 20, control screw 21, movable block 22, safety rod 23, card slot 24, limit rod 25, telescopic box 26, telescopic rod 27, limit groove 28. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] Please refer to the attached Figures 1-8 This application provides embodiments of the following five preferred solutions.

[0040] Embodiment 1

[0041] A scaffolding with adjustable platform height, the scaffolding with adjustable platform height includes;

[0042] A first platform 1, four first support columns 2 are vertically symmetrically arranged on both sides of the first platform 1, and a scissors brace 5 is connected by bolts between two first support columns 2 on one side;

[0043] A second platform 3, the second platform 3 is horizontally arranged directly above the first platform 1, four second support columns 4 are vertically symmetrically arranged on both sides of the second platform 3, the four second support columns 4 are respectively inserted and arranged at the upper ends of the first support columns 2 through an adjustment assembly, and the adjustment assembly includes an adjustment box 9 and an insertion rod 7. Receiving grooves are opened at the upper ends of the first support columns 2. The insertion rod 7 is integrally and vertically arranged at the lower end of the second support column 4. The insertion rod 7 is vertically and movably inserted into the receiving groove. And the adjustment box 9 is welded on the first support column 2 on one side of the receiving groove. Worm gears 10 are vertically and movably inserted into the adjustment box 9 through a central axis. Strip-shaped grooves are respectively opened through one side of the receiving groove close to the worm gear 10. Tooth plates 8 are integrally arranged on one side of the insertion rod 7. The tooth plates 8 penetrate and are inserted into the strip-shaped grooves. A number of teeth are symmetrically arranged on one side of the tooth plate 8, and the teeth on one side of the worm gear 10 are meshed with the teeth on one side of the tooth plate 8;

[0044] Two ladders 6, the two ladders 6 are vertically symmetrically arranged on both sides between the first platform 1 and the second platform 3. On both sides of the upper end of the ladder 6, two bearing sleeves are horizontally symmetrically arranged. One side of the two control shafts 13 is respectively arranged through the bearing sleeves by means of bearings. On one side of the adjusting box 9, a mounting plate 11 is horizontally arranged. At the lower end of the mounting plate 11, a bearing plate 12 is vertically arranged through a bolt column. One side of the control shaft 13 is arranged through the bearing plate 12 by means of a bearing. On one side of the control shaft 13 passing through the bearing plate 12, a worm is integrally arranged, and one side of the worm is meshed with a worm gear 10;

[0045] A control assembly, the control assembly is horizontally inserted into the ladder 6, and the control assembly includes an adjusting wheel 14 and two control shafts 13. The adjusting wheel 14 is vertically arranged between two adjacent control shafts 13. At the centers of both sides of the adjusting wheel 14, docking sleeves 15 are horizontally arranged. A rhombic groove is opened on one side of each docking sleeve 15. A rhombic insertion rod is arranged on one side of each control shaft 13, and the rhombic insertion rods of the two control shafts 13 are respectively inserted into the two rhombic grooves;

[0046] A telescopic assembly, the telescopic assembly is arranged at the upper end of the ladder 6, and the telescopic assembly includes two telescopic boxes 26;

[0047] A safety assembly, the installation assembly is arranged at the upper end of the ladder 6, and the safety assembly includes a support cylinder 16 and a safety box 17. A number of footrests 601 are horizontally and evenly arranged on the ladder 6. The support cylinder 16 is vertically welded at the upper end of the footrest 601 close to one side of the adjusting wheel 14. The safety box 17 is integrally horizontally arranged at the upper end of the support cylinder 16. Welding boxes 18 are horizontally welded between both sides of the safety box 17 and the ladder 6. A first moving groove is opened in the safety box 17. A second moving groove is opened through the support cylinder 16 at the lower end of the moving groove. A push block 19 is horizontally arranged in the first moving groove. A push column 20 is vertically arranged at the center of the lower end of the push block 19. The push column 20 is vertically inserted into the second moving groove. A control screw rod 21 is vertically inserted into the first moving groove through the upper end of the safety box 17 by means of a bearing. An internal thread groove is opened at the upper end of the push block 19. One side of the control screw rod 21 placed in the first moving groove is inserted into the internal thread groove by means of a thread. A first spring groove is opened through the first moving groove in the welding box 18. A moving block 22 is horizontally inserted into the first spring groove. A safety rod 23 is horizontally arranged on one side of the moving block 22. A partition plate is vertically arranged on one side in the first spring groove. One side of the safety rod 23 passes through the partition plate. A first spring is sleeved between the partition plate and the moving block 22 on the side of the safety rod 23. One side of the moving block 22 is inserted into the first moving groove and is in contact with one side of the push block 19, and the upper end surface of the side of the moving block 22 close to the push block 19 is an inclined surface.

[0048] An adjusting method for a scaffolding, the adjusting method of the scaffolding is applied to the above-mentioned scaffolding with adjustable platform height, and includes the following steps:

[0049] Step 1: The rotation control screw 21 drives the push blocks 19 and 20 to move upward through the thread. Under the resilience of the first spring, the inclined surface side of the movable block 22 retracts into the first movable groove, and under the abutting effect, it will not retract excessively. At the same time, the safety rod 23 disengages from the card slot 24;

[0050] Step 2: Rotate the adjustment wheel 14 to drive the control shafts 13 on both sides to rotate, and then drive the worm gear 10 to rotate under the action of the worm;

[0051] Step 3: While the worm gear 10 rotates, under the action of its teeth and the teeth of the tooth plate 8, the insertion rod 7 moves up and down for adjustment, thereby realizing the up and down height change of the second platform 3 and playing an adaptation and adjustment role;

[0052] Step 4: After the adjustment is completed, under the mechanical structure of the worm and the worm gear 10, automatic stability is achieved. During this period, as the adjustment wheel 14 rotates, several limiting grooves 28 on the outer circumferential surface are intermittently in contact with the lower end of the limiting rod 25 to limit the rotational movement of the adjustment wheel 14, thereby realizing the self-positioning of the movement of the control shaft 13;

[0053] Step 5: During this period, 27 slides up and down along the telescopic box 26 for auxiliary guiding and adaptively extends the length of the ladder 6 to facilitate personnel to climb up after the tabletop is raised;

[0054] Step 6: Finally, turn the control screw 21 to make the push block 19 push the movable block 22 to insert the safety rod 23 into the card slot 24 to limit the movement of the telescopic rod 27 and provide further safety protection for the support of the second platform 3. To prevent safety problems such as overturning caused by the fracture of the teeth of the adjustment box 9, and the push post 20 descends with the push block 19 to limit the up and down movement of the limiting rod 25 and improve the stability of the adjustment wheel 14 to avoid the shaking of the adjustment wheel 14 during the construction process.

[0055] Embodiment 2

[0056] On the basis of Embodiment 1, two telescopic boxes 26 are respectively welded to the upper ends on both sides of the ladder 6. Telescopic slots are vertically penetrated in both telescopic boxes 26. Two telescopic rods 27 are vertically and symmetrically arranged at the lower ends on one side of the second platform 3. The two telescopic rods 27 are respectively vertically inserted into the two telescopic slots to play the role of extending the ladder 6, ensuring the stability of the ladder 6, and the extended telescopic rods 27 can be self-assembled through the card slot 24 to form a temporary footrest 601 made of wood or other materials in the prior art.

[0057] Embodiment 3

[0058] On the basis of Embodiment 2, a plurality of card slots 24 are symmetrically arranged on one side of each of the two telescopic rods 27 placed in the telescopic groove. One side of the safety rod 23 penetrates through one side of the ladder 6 and is inserted into the telescopic groove, and one side of the safety rod 23 placed in the telescopic groove is inserted into one of the card slots 24, which plays a role in strengthening the safety support and protection for the support of the second support column 4 and the first support column 2 during use.

[0059] Embodiment 4

[0060] On the basis of Embodiment 3, a guide plate is horizontally arranged at the lower end of the second movable groove. A limiting rod 25 is vertically and movably inserted through the center of the guide plate. The lower end of the limiting rod 25 movably penetrates through the pedal 601. Spring plates are horizontally arranged at the lower end of the limiting rod 25 in the second movable groove. Second springs are sleeved on the limiting rod 25 between the spring plates and the guide plate. A plurality of limiting grooves 28 are symmetrically formed on one side of the outer circumference of the adjusting wheel 14. The lower end of the limiting rod 25 penetrates through the lower end of the pedal 601 and is inserted into one of the limiting grooves 28 to limit the adjusting wheel 14.

[0061] Embodiment 5

[0062] On the basis of Embodiment 4, the two side surfaces of the lower end of the limiting rod 25 and the two side surfaces in the limiting groove 28 are both inclined surfaces, and the upper end of the limiting rod 25 penetrating through the guide plate is in contact with the lower end of the push rod 20, so that the normal rotation operation of the adjusting wheel 14 is not affected when adjusting the height of the second platform 3.

[0063] In use, the rotation control screw 21 drives the push blocks 19 and 20 to move upward through the thread. Under the resilience of the first spring, the inclined surface side of the movable block 22 retracts into the first movable groove, and under the abutting action, it will not retract excessively. At the same time, the safety rod 23 disengages from the card slot 24. Rotate the adjustment wheel 14 to drive the control shafts 13 on both sides to rotate, and then drive the worm gear 10 to rotate under the action of the worm. While the worm gear 10 rotates, under the action of its teeth and the teeth of the tooth plate 8, the insertion rod 7 moves up and down for adjustment, thereby realizing the up and down height change of the second platform 3, playing an adaptation and adjustment role. After the adjustment is completed, it is automatically stabilized under the mechanical structure of the worm and the worm gear 10. During this period, as the adjustment wheel 14 rotates, several limiting grooves 28 on the outer circumferential surface intermittently contact the lower end of the limiting rod 25 to limit the rotation movement of the adjustment wheel 14, thereby realizing the self-positioning of the movement of the control shaft 13. During this period, 27 slides up and down along the telescopic box 26 for auxiliary guidance and adaptively extends the length of the ladder 6, facilitating personnel to climb up after the table surface is raised. Finally, turn the control screw 21 to make the push block 19 push the movable block 22 to insert the safety rod 23 into the card slot 24 to limit the movement of the telescopic rod 27 and provide further safety protection for the support of the second platform 3 to prevent safety problems such as overturning caused by the fracture of the teeth of the adjustment box 9. And the push post 20 descends with the push block 19 to limit the up and down movement of the limiting rod 25, improving the stability of the adjustment wheel 14 and avoiding the shaking of the adjustment wheel 14 during the construction process. When it is necessary to build multiple layers of this scaffolding, two people can operate simultaneously on the ladder 6. The operation is simple and the use is convenient.

[0064] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A scaffolding with adjustable platform height, characterized in that: The scaffolding with adjustable platform height includes: A first platform (1), on both sides of the first platform (1), four first support columns (2) are symmetrically arranged vertically, and a cross brace (5) is arranged between two first support columns (2) on one side through bolts; A second platform (3), the second platform (3) is horizontally arranged directly above the first platform (1), on both sides of the second platform (3), four second support columns (4) are symmetrically arranged vertically, and the four second support columns (4) are respectively arranged by inserting the upper ends of the first support columns (2) through an adjustment assembly, and the adjustment assembly includes an adjustment box (9) and an insertion rod (7); in each adjustment box (9), a worm gear (10) is vertically and movably inserted through a central axis, a strip-shaped groove is respectively opened through the side close to the worm gear (10) in the storage groove, a toothed plate (8) is integrally arranged on one side of the insertion rod (7), the toothed plate (8) is inserted through the strip-shaped groove, a plurality of teeth are symmetrically arranged on one side of the toothed plate (8), and the teeth on one side of the worm gear (10) are meshed with the teeth on one side of the toothed plate (8); Two ladders (6), the two ladders (6) are respectively symmetrically arranged vertically on both sides between the first platform (1) and the second platform (3); A control assembly, the control assembly is horizontally inserted into the ladder (6), and the control assembly includes an adjustment wheel (14) and two control shafts (13); A telescopic assembly, the telescopic assembly is arranged at the upper end of the ladder (6), and the telescopic assembly includes two telescopic boxes (26); A safety assembly, the safety assembly is arranged at the upper end of the ladder (6), and the safety assembly includes a support cylinder (16) and a safety box (17).

2. The adjustable platform height scaffolding according to claim 1, characterized in that: A storage groove is opened at the upper end of each first support column (2), the insertion rod (7) is integrally arranged vertically at the lower end of the second support column (4), the insertion rod (7) is vertically and movably inserted into the storage groove, and the adjustment box (9) is welded on the first support column (2) on one side of the storage groove.

3. The adjustable platform height scaffolding according to claim 1, characterized in that: On both sides of the upper end of the ladder (6), two bearing sleeves are symmetrically arranged horizontally, one side of each of the two control shafts (13) is inserted through the bearing sleeve through a bearing, an installation plate (11) is horizontally arranged on one side of the adjustment box (9), a bearing plate (12) is vertically arranged at the lower end of the installation plate (11) through a bolt column, one side of the control shaft (13) is inserted through the bearing plate (12) through a bearing, a worm is integrally arranged on one side of the control shaft (13) passing through the bearing plate (12), and the worm on one side is meshed with the worm gear (10).

4. The scaffolding with adjustable platform height according to claim 3, characterized in that: The adjustment wheel (14) is vertically arranged between two adjacent control shafts (13), docking sleeves (15) are horizontally arranged at the centers of both sides of the adjustment wheel (14), a rhombic groove is opened on one side of each docking sleeve (15), a rhombic insertion rod is arranged on one side of each control shaft (13), and the rhombic insertion rods of the two control shafts (13) are respectively inserted into the two rhombic grooves.

5. The adjustable platform height scaffolding according to claim 4, wherein: A plurality of footrests (601) are horizontally and evenly arranged on the ladder (6). A support cylinder (16) is vertically welded to the upper end of the footrest (601) on one side close to the adjusting wheel (14). A safety box (17) is integrally and horizontally arranged at the upper end of the support cylinder (16). Welding boxes (18) are horizontally welded between both sides of the safety box (17) and the ladder (6). A first moving groove is formed in the safety box (17). A second moving groove is formed in the lower end of the moving groove and penetrates through the support cylinder (16). A pushing block (19) is horizontally arranged in the first moving groove. A pushing column (20) is vertically arranged at the center of the lower end of the pushing block (19). The pushing column (20) is vertically inserted into the second moving groove. A control screw rod (21) is vertically inserted into the first moving groove through the upper end of the safety box (17) through a bearing. An internal thread groove is formed in the upper end of the pushing block (19). The control screw rod (21) is arranged on one side in the first moving groove and is inserted into the internal thread groove through a thread.

6. The adjustable platform height scaffolding according to claim 5, characterized in that: A first spring groove is formed in the welding box (18) and penetrates through the first moving groove. A moving block (22) is horizontally inserted into the first spring groove. A safety rod (23) is horizontally arranged on one side of the moving block (22). A partition plate is vertically arranged on one side in the first spring groove. The safety rod (23) penetrates through the partition plate on one side. First springs are sleeved between the safety rod (23) and both the partition plate and the moving block (22). One side of the moving block (22) penetrates and is inserted into the first moving groove and is in contact with one side of the pushing block (19). The upper end surface of the side of the moving block (22) close to the pushing block (19) is an inclined surface.

7. The scaffolding with adjustable platform height according to claim 6, characterized in that: Two telescopic boxes (26) are respectively welded to the upper ends of both sides of the ladder (6). Telescopic grooves are vertically penetrated through the telescopic boxes (26). Two telescopic rods (27) are vertically and symmetrically arranged at the lower end of one side of the second platform (3) and close to the ladder (6). The two telescopic rods (27) are respectively vertically inserted into the two telescopic grooves. A plurality of clamping grooves (24) are symmetrically arranged on one side of the two telescopic rods (27) in the telescopic grooves. One side of the safety rod (23) penetrates through one side of the ladder (6) and is inserted into the telescopic groove. One side of the safety rod (23) in the telescopic groove is inserted into one of the clamping grooves (24).

8. The adjustable platform height scaffolding according to claim 7, characterized in that: A guide plate is horizontally arranged at the lower end in the second moving groove. A limiting rod (25) is vertically and movably penetrated through the center of the guide plate. The lower end of the limiting rod (25) movably penetrates through the footrest (601). Spring plates are horizontally arranged at the lower end of the limiting rod (25) in the second moving groove. Second springs are sleeved between the limiting rod (25) and both the spring plate and the guide plate. A plurality of limiting grooves (28) are symmetrically formed on one side of the outer circumference of the adjusting wheel (14). The lower end of the limiting rod (25) penetrates through the lower end of the footrest (601) and is inserted into one of the limiting grooves (28). The two side surfaces of the lower end of the limiting rod (25) and the two side surfaces in the limiting groove (28) are inclined surfaces. The upper end of the limiting rod (25) penetrating through the guide plate is in contact with the lower end of the pushing column (20).

9. A method for adjusting a scaffold, characterized in that: The adjusting method of the scaffolding is applied to the scaffolding with adjustable platform height according to any one of the above claims 1-8, and includes the following steps: Step 1: Rotate the control screw (21), which drives the push blocks (19) and (20) to move upward through the thread. Under the resilience of the first spring, the inclined surface side of the movable block (22) retracts into the first movable groove, and under the abutting effect, it will not retract excessively. At the same time, the safety rod (23) disengages from the clamping groove (24); Step 2: Rotate the adjusting wheel (14), which drives the control shafts (13) on both sides to rotate, and then drives the worm gear (10) to rotate under the action of the worm; Step 3: While the worm gear (10) rotates, under the action of its teeth and the teeth of the tooth plate (8), the insertion rod (7) moves up and down for adjustment, thereby realizing the change in the vertical height of the second platform (3) and playing an adaptation adjustment role; Step 4: After the adjustment is completed, under the mechanical structure of the worm and the worm gear (10), automatic stabilization is carried out. During this period, as the adjusting wheel (14) rotates, several limiting grooves (28) on the outer circumferential surface intermittently contact the lower end of the limiting rod (25), limiting the rotation movement of the adjusting wheel (14), and thus realizing the self-positioning of the movement of the control shaft (13); Step 5: During this period, the telescopic rod (27) slides up and down along the telescopic box (26) to provide auxiliary guidance and adaptively extend the length of the ladder (6), facilitating personnel to climb up after the tabletop is raised; Step 6: Finally, turn the control screw (21) to make the push block (19) push the movable block (22) to insert the safety rod (23) into the clamping groove (24), limit the movement of the telescopic rod (27), and provide further safety protection for the support of the second platform (3) to prevent safety problems such as overturning caused by the fracture of the teeth of the adjustment box (9). And the push post (20) descends with the push block (19) to limit the up and down movement of the limiting rod (25), improve the stability of the adjusting wheel (14), and avoid the shaking of the adjusting wheel (14) during the construction process.

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