A manually adjustable ladder device

Abstract

This utility model provides a manually adjustable climbing ladder device, including: a climbing ladder base frame, a ladder frame mechanism, and a drive control mechanism; the drive control mechanism is equipped with a rope and a rope winch assembly, the rope winch assembly is manually adjustable to control the change in the effective length of the rope, providing tension for the extension and retraction of the ladder frame mechanism, thereby adjusting the extension and retraction of the climbing ladder device; the climbing ladder base frame, as the support mechanism of the ladder frame mechanism, ensures the stability of the entire climbing ladder device. The manually adjustable climbing ladder device provided by this utility model can be flexibly accessed and stored, can directly connect the tower crane platform and the operator's cab platform, and is suitable for different models of tower cranes. It not only improves work efficiency but also enhances personnel safety, and can be promoted for high-altitude field operations.

Description

Technical Field

[0001] This utility model relates to the field of construction equipment technology, and more specifically, to a manually adjustable ladder device. Background Technology

[0002] The tower crane frame is a key component of a tower crane, primarily used for lifting the tower during erection and lowering it during dismantling. The frame connects to the tower crane's standard sections and the lower slewing support. During lifting, operation, and lowering of the tower crane, the frame, standard sections, and lower slewing support remain stationary, while the operator's cab platform, connected to the upper slewing support, rotates synchronously with it.

[0003] In traditional tower cranes, ladders are installed in two ways: either welded to the main structure or bolted on. Both methods result in fixed ladders that are difficult to disassemble, thus there is no direct ladder connecting the crane platform and the operator's cab platform. During tower lifting and lowering, operators frequently need to travel between the crane platform and the operator's cab platform. To reach the operator's cab platform from the crane platform, the operator must first crawl through a gap in the main structure of the crane, grab onto the standard section ladder, then climb the standard section ladder to the lower slewing support, and finally climb the lower slewing support ladder to the upper slewing support to reach the operator's cab platform. This significantly reduces work efficiency and greatly increases the safety risks for operators traveling from the crane platform to the standard section ladder. Utility Model Content

[0004] This invention provides a manually adjustable ladder device to overcome the shortcomings of traditional ladder devices in the prior art.

[0005] This utility model provides a manually adjustable climbing ladder device, including: a climbing ladder base frame; a ladder frame mechanism, which is mounted on the climbing ladder base frame and is used to connect two platforms at different elevations; a drive control mechanism, which is equipped with a rope and a rope winch assembly, wherein the rope is used to provide tension to control the extension, retraction, and position locking of the ladder frame mechanism; the rope winch assembly is fixedly installed on the top of the ladder frame mechanism, and is used to control the extension, retraction, and position locking of the ladder frame mechanism by manually winch the rope; wherein the rope is fixedly wound around the rope winch assembly and passes through the ladder frame mechanism and is fixed to the climbing ladder base frame.

[0006] Furthermore, the ladder base includes: two anti-slip seats; a reinforced aluminum tube, with both ends of the reinforced aluminum tube nested and connected to the two anti-slip seats; wherein each end of the reinforced aluminum tube has a rope hole.

[0007] Furthermore, the ladder frame mechanism is composed of multiple ladder sections that are sequentially and retractably connected together. Each ladder section includes: a step, which is fixed horizontally; two vertical rods, located at opposite ends of the step; two connecting sleeves, which are fitted onto the tops of the two vertical rods and are fixedly connected to both ends of the step; and a safety lock button, which is embedded between the connecting sleeve and the step. The safety lock button, in conjunction with the connecting sleeve, locks the nested upper ladder section at the target height after the upper ladder section has fully extended. The diameter of the vertical rods in the multiple ladder sections decreases progressively from bottom to top, and the nested vertical rods are connected to achieve the telescopic adjustment of the multiple ladder sections.

[0008] Furthermore, the rope assembly includes: a circular tube arranged horizontally, with a positioning hole at one end; an upper step arranged horizontally below the circular tube; two vertical circular tubes, both arranged vertically; and two mounting bases, each mounted on the upper end of one of the two vertical circular tubes; wherein both ends of the circular tubes and both ends of the upper step are connected to the two mounting bases.

[0009] Furthermore, the mounting base includes: a first mounting base, which is nested and connected to one end of the circular tube having a positioning hole, for providing a driving force for manual adjustment; and a second mounting base, which is mounted on the circular tube corresponding to the first mounting base, for limiting the rotation of the circular tube.

[0010] Furthermore, the first mounting base includes: a first connecting seat, which is connected to the round tube and the vertical round tube to limit their positions; a handle for manual adjustment, the handle having a hole; and a first round steel bar, which is a cylindrical steel body, one end of the first round steel bar is welded and fixed to the handle, the other end of the first round steel bar is nested and connected to the first connecting seat, and the part extending out of the first connecting seat is precisely positioned and connected to the round tube; wherein, the rotation adjustment of the handle is transmitted to the round tube through the first round steel bar.

[0011] Furthermore, the first mounting base also includes: a second connecting base, bolted to the first connecting base to define the positions of the round tube, the vertical round tube, and the upper step; the second connecting base has a fixing groove added to the first connecting base for connecting the upper step; a limiting safety lock button, inserted in the second connecting base for limiting the rotation of the handle; a second round steel bar, connected to the second connecting base and the first connecting base through a round hole, for working with the limiting safety lock button to jointly limit the rotation of the handle; a spring; a fixing base, with the spring nested in the fixing base, and the fixing base with the spring embedded is inserted into the fixing groove of the second connecting base; wherein, one end of the second round steel bar is inserted into the fixing base with the spring embedded, and the other end passes through the round hole of the second connecting base; the second round steel bar moves horizontally in the fixing base and the second connecting base by the horizontal push of the limiting safety lock button, and the limiting safety lock button limits the rotation of the handle by driving the second round steel bar to move towards the first connecting base and insert into the hole on the handle.

[0012] Furthermore, the second round steel is divided into three cylindrical segments with different diameters. The first, second, and third cylindrical segments of the second round steel are connected sequentially along the direction from the first connecting seat to the second connecting seat. Among them, the diameter of the first cylindrical segment is the largest, the diameter of the second cylindrical segment is the smallest, and the diameter of the third cylindrical segment is between the first two. The second cylindrical segment is embedded and connected to the movement-limiting safety button, which is used to transmit the movement of the movement-limiting safety button to the second round steel and drive the movement of the second round steel.

[0013] Furthermore, the second mounting base includes: a third connecting base; and a fourth connecting base bolted to the third connecting base to define the positions of the circular tube, the vertical circular tube, and the upper step; wherein the third connecting base has a rectangular cavity on the basis of the fourth connecting base for nesting and connecting the upper step.

[0014] Furthermore, there are two ropes. One end of one rope is fixedly connected to one end of the round tube and wrapped around the round tube before passing through all the vertical bars of the ladder mechanism. The other end is then fixedly connected to a rope hole in the reinforced aluminum tube. The other rope is similarly fixed at the other end of the round tube and another rope hole in the reinforced aluminum tube. The rotation of the handle is transmitted to the round tube through the first round steel bar. The rotation of the round tube drives the synchronous twisting of the two ropes, thereby controlling the extension and retraction of the ladder mechanism.

[0015] The present invention relates to a manually adjustable ladder device, comprising a ladder base, a ladder frame mechanism, and a drive control mechanism. The ladder frame mechanism is mounted on the ladder base and is used to connect two platforms at different elevations. The drive control mechanism includes a rope and a rope winch assembly. The rope provides tension to control the extension, retraction, and position locking of the ladder frame mechanism. The rope winch assembly is fixedly mounted on the top of the ladder frame mechanism and is used to control the extension, retraction, and position locking of the ladder frame mechanism by manually winding the rope. The rope is fixedly wound around the rope winch assembly and passes through the ladder frame mechanism, securing it to the ladder base. The ladder device connects two platforms at different elevations by manually adjusting the length of the rope to control its extension and retraction. This ladder device does not need to be fixed to the tower crane, allowing for flexible and convenient use and storage depending on the application scenario. Furthermore, the tight fit between the components reduces maintenance difficulty and cost. The extendable design can meet different working conditions, easily adapting to different tower crane models by adjusting the ladder height. In addition, the adjustable telescopic ladder can directly connect the frame platform and the operator's cab platform, reducing the climbing risks for operators when climbing from the frame platform to the standard section ladder. In summary, this ladder device reduces the difficulty and risks for workers operating at heights, thereby significantly improving work efficiency. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings: Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a three-dimensional structural diagram of the rope assembly of this utility model.

[0018] Figure 3 This is an exploded view of the first connecting seat, handle, and first round steel in the first mounting seat of the rope assembly of this utility model.

[0019] Figure 4 This is an exploded view of the second connecting seat, the movement-limiting safety lock button, the second round steel, the spring, and the fixing seat in the first mounting seat of the rope assembly of this utility model.

[0020] Figure 5 This is a functional schematic diagram of the first mounting base of the rope assembly of this utility model.

[0021] Figure 6 This is an installation diagram of the rope assembly of this utility model.

[0022] Figure 7 This is an exploded view of the second mounting base of the rope assembly of this utility model.

[0023] Figure 8 This is a schematic diagram of the ladder section of this utility model.

[0024] Figure 9 This is a schematic diagram of the structure of the ladder base frame of this utility model.

[0025] The above figures include the following reference numerals: 1. Ladder base frame; 2. Ladder frame mechanism; 3. Drive control mechanism.

[0026] 10. Anti-slip base; 11. Reinforced aluminum tube; 20. Ladder section; 30. Rope; 31. Rope twisting assembly 200. Step; 201. Vertical rod; 202. Connecting sleeve; 203. Safety lock button; 310. Round tube; 311. Upper step; 312. Vertical round tube; 313. Mounting base.

[0027] 3131, First mounting base; 3132, Second mounting base.

[0028] 3131a, First connecting seat; 3131b, First round steel; 3131c, Handle; 3131d, Second connecting seat; 3131e, Limiting safety lock button; 3131f, Second round steel; 3131g, Spring; 3131h, Fixed seat; 3132a, Third connecting seat; 3132b, Fourth connecting seat. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] As attached Figure 1-9 As shown, a manually adjustable ladder device includes: a ladder base frame 1; a ladder frame mechanism 2, which is mounted on the ladder base frame 1 and is used to connect two platforms at different elevations; a drive control mechanism 3, which is equipped with a rope 30 and a rope winch assembly 31. The rope 30 is used to provide tension to control the extension, retraction, and position locking of the ladder frame mechanism 2; the rope winch assembly 31 is fixedly installed on the top of the ladder frame mechanism 2 and is used to control the extension, retraction, and position locking of the ladder frame mechanism 2 by manually winch the rope 30; wherein the rope 30 is fixedly wound around the rope winch assembly 31 and passes through the ladder frame mechanism 2 and is fixed to the ladder base frame 1.

[0031] Specifically, the ladder frame mechanism 2 is nested on the ladder base frame 1, and the ladder frame mechanism 2 can extend and retract in the vertical direction; wherein, the extension directions of the ladder base frame 1 and the ladder frame mechanism 2 are perpendicular to each other, and the ladder base frame 1 provides installation support and braking protection for the ladder frame mechanism 2.

[0032] In one possible implementation, the ladder base frame 1 includes: two anti-slip seats 10; a reinforced aluminum tube 11, with both ends of the reinforced aluminum tube 11 nested and connected to the two anti-slip seats 10; wherein each end of the reinforced aluminum tube 11 has a rope hole.

[0033] Specifically, the anti-slip seat 10 has a horseshoe-shaped base, and the bottom of the anti-slip seat 10 is provided with threads to increase friction. The design of the anti-slip seat 10 can maximize the anti-slip performance and stability of the ladder base frame 1, and can effectively ensure construction safety. The cross-section of the reinforcing aluminum tube 11 is rectangular, and it is sleeved together with the ladder frame mechanism 2. Its reinforcement design is more conducive to supporting the entire ladder frame mechanism 2. The rope holes at both ends of the reinforcing aluminum tube 11 are located at the junction of the reinforcing aluminum tube 11 and the ladder frame mechanism 2.

[0034] In one possible implementation, the ladder mechanism 2 is composed of multiple ladder sections 20 that are sequentially and retractably connected together. The ladder section 20 includes a step 200, which is fixed horizontally; two vertical rods 201, located at both ends of the step 200; two connecting sleeves 202, which are fitted onto the tops of the two vertical rods 201 and fixedly connected to both ends of the step 200; and a safety lock button 203, which is embedded between the connecting sleeve and the step 200 and cooperates with the connecting sleeve to lock the nested upper ladder section 20 at the target height after the upper ladder section 20 is fully extended. The diameter of the vertical rods 201 in the multi-section ladder 20 decreases gradually from bottom to top, and the vertical rods 201 are nested together to achieve the telescopic adjustment of the multi-section ladder 20.

[0035] Specifically, the design of the retractable multi-section ladder 20 allows the ladder frame mechanism 2 to serve as the height adjustment part of the climbing device, and the adjustable height of the climbing device is determined by the length and number of ladder sections 20.

[0036] The connecting sleeve 202 has a positioning hole on the side connected to the step 200. The upper part of the vertical rod 201 has two positioning holes along the center line of the step 200, and the lower part of the vertical rod 201 also has two positioning holes in the same position. The safety lock button 203 has a round steel along the center line of the step 200 for positioning the position of the ladder section 20. When the ladder frame mechanism 2 is unfolded, after the upper ladder section 20 of one ladder section 20 is fully extended, when the lower part of the vertical rod 201 of the upper ladder section 20 meets the upper part of this ladder section 20, the two safety lock buttons 203 at both ends of this ladder section 20 are moved toward the connecting sleeve 202 at both ends of this ladder section 20. At this time, the round steel on the safety lock button 203 moves accordingly and passes through the connecting sleeve 202 of this ladder section 20, the upper positioning hole of this ladder section 20 and the lower positioning hole of the upper ladder section 20 in sequence, thereby connecting and locking the positional relationship between this ladder section 20 and the upper ladder section 20.

[0037] In addition, the vertical bar 201 is made of seamless aluminum tube, and the step 200 is made of high-toughness engineering reinforced nylon. The combination of the two can achieve a stable and non-slip effect.

[0038] In one possible implementation, the rope assembly 31 includes: a circular tube 310, which is arranged horizontally and has a positioning hole at one end; an upper step 311, which is arranged horizontally below the circular tube 310; two vertical circular tubes 312, both of which are arranged vertically; and two mounting seats 313, which are correspondingly mounted on the upper ends of the two vertical circular tubes 312; wherein both ends of the circular tube 310 and both ends of the upper step 311 are connected to the two mounting seats 313.

[0039] Specifically, the mounting base 313 connects the round tube 310, the upper step 311 and the vertical round tube 312 together, and the four together form the rope assembly 31 to drive the extension and retraction adjustment of the climbing device.

[0040] In one possible implementation, the mounting base 313 includes: a first mounting base 3131, which is nested and connected to one end of the circular tube 310 that has a positioning hole, for providing a driving force for manual adjustment; and a second mounting base 3132, which is mounted on the circular tube 310 corresponding to the first mounting base 3131, for limiting the rotation of the circular tube 310.

[0041] Specifically, the first mounting base 3131, the round tube 310, the upper step 311 and the vertical round tube 312 are used to realize the manual adjustment and height locking functions of the telescopic climbing ladder device; the second mounting base 3132 mainly serves to fix the installation.

[0042] In one possible implementation, the first mounting base 3131 includes: a first connecting base 3131a, which is connected to the circular tube 310 and the vertical circular tube 312 to limit their positions; a handle 3131c, which is used for manual adjustment and has a hole; and a first round steel bar 3131b, which is a cylindrical steel body. One end of the first round steel bar 3131b is welded and fixed to the handle 3131c, and the other end of the first round steel bar 3131b is nested and connected to the first connecting base 3131a. The part extending out of the first connecting base 3131a is precisely positioned and connected to the circular tube 310. The rotation adjustment of the handle 3131c is transmitted to the circular tube 310 through the first round steel bar 3131b.

[0043] Specifically, the first connecting seat 3131a has two sets of bolt holes (2 per set) on both sides, and the two sets of bolt holes are arranged perpendicular to each other. When assembling the above components, firstly, the handle 3131c is inserted into the round hole of the fixing washer, then the handle 3131c is welded to the first round steel 3131b and fixed. Then, the bolts are passed through the bolt holes of the fixing washer and aligned with one set of bolt holes of the first connecting seat to achieve the effect of fixed connection with one side of the first connecting seat 3131a. Finally, the bushing is connected by bolts passing through the bolt holes on the bushing and aligned with the other set of bolt holes of the first connecting seat 3131a to achieve the effect of fixed connection with the other side of the first connecting seat 3131a.

[0044] The diameter of the hole in the fixing shim is smaller than the diameter of the first round steel 3131b. This design can limit the position of the handle by fixing the shim and prevent the handle from moving outward. The bushing is nested and connected to the first round steel 3131b in the first connecting seat 3131a. The bushing can protect the material and reduce unavoidable wear. On the other hand, when the handle 3131c is turned, it can reduce the frictional resistance between the parts and facilitate manual adjustment.

[0045] In one possible implementation, the first mounting base 3131 further includes: a second connecting base 3131d, bolted to the first connecting base 3131a to define the positions of the circular tube 310, the vertical circular tube 312, and the upper step 311; the second connecting base 3131d adds a fixing groove to the first connecting base 3131a for connecting the upper step 311; and a limiting safety lock button 3131e, inserted into the second connecting base 3131d, for limiting the handle 313. The rotation of 1c; the second round steel 3131f, which is connected to the second connecting seat 3131d and the first connecting seat 3131a through the round hole passing through the second connecting seat 3131d, is used to cooperate with the motion-limiting safety lock button 3131e to jointly limit the rotation of the handle 3131c; the spring 3131g; the fixed seat 3131h, in which the spring 3131g is nested, and the fixed seat 3131h with the spring 3131g embedded is inserted into the fixed groove of the second connecting seat 3131d; One end of the second round steel bar 3131f is inserted into the fixed seat 3131h, which is embedded with the spring 3131g, and the other end passes through the round hole of the second connecting seat 3131d. The second round steel bar 3131f moves horizontally in the fixed seat 3131h and the second connecting seat 3131d by the horizontal push of the limiting safety lock button 3131e. The limiting safety lock button 3131e restricts the rotation of the handle 3131c by driving the second round steel bar 3131f to move towards the first connecting seat 3131a and insert it into the hole on the handle 3131c.

[0046] Specifically, the second connecting seat 3131d is provided with a protruding rectangular fixing groove, and the groove wall is provided with a groove for inserting the motion-limiting safety lock button 3131e. The groove opening is provided with symmetrical rectangular grooves for inserting the fixing seat 3131h. A set of bolt holes (2 holes / set) is opened on one side of the second connecting seat 3131d with the protruding rectangular fixing groove. These two bolt holes are arranged in the vertical direction.

[0047] When assembling the above components, first place the spring 3131g into the fixing seat 3131h, then insert the fixing seat 3131h into the fixing groove of the second connecting seat 3131d, then pass the second round steel 3131f through the round hole of the second connecting seat 3131d and insert it into the fixing seat 3131h, then insert the movement-limiting safety lock button 3131e, and finally connect the bushing with a set of bolt holes of the second connecting seat 3131d by passing the bolt through the bolt hole on the bushing, thereby achieving the effect of fixed connection with the second connecting seat 3131d.

[0048] The use of bushings can reduce wear between the round tube 310 and the second connecting seat 3131d, and make the rotation of the round tube 310 easier.

[0049] In one possible implementation, the second round steel 3131f is divided into three cylindrical segments with different diameters. The first, second, and third cylindrical segments of the second round steel 3131f are connected sequentially along the direction from the first connecting seat 3131a to the second connecting seat 3131d. The first cylindrical segment has the largest diameter, the second cylindrical segment has the smallest diameter, and the diameter of the third cylindrical segment is between the two. The second cylindrical segment is embedded and connected to the motion-limiting safety button 3131e, which is used to transmit the movement of the motion-limiting safety button 3131e to the second round steel 3131f and drive the movement of the second round steel 3131f.

[0050] Specifically, the diameter of the third cylindrical section of the second round steel 3131f is similar to the diameter of the hole in the handle 3131c, and the diameter of the hole in the handle 3131c is slightly larger than the diameter of the third cylindrical section so that the second round steel 3131f can be inserted into the handle 3131c, which can play a protective role when the telescopic ladder is extended or retracted.

[0051] In one possible implementation, the second mounting base 3132 includes: The third connecting seat 3132a and the fourth connecting seat 3132b are bolted together to define the positions of the round tube 310, the vertical round tube 312 and the upper step 311; wherein, the third connecting seat 3132a has a rectangular cavity on the basis of the fourth connecting seat 3132b for nesting connection of the upper step 311.

[0052] Specifically, the third connecting seat 3132a and the fourth connecting seat 3132b are also bolted to the bushing, which is intended to reduce wear between components and facilitate the rotation of the round tube 310.

[0053] The four connecting seats of the above ladder device are all made of nylon, which is easy to process and has strong wear resistance, resulting in good economic benefits.

[0054] In summary, when installing the rope assembly 31, first assemble the third connecting seat 3132a, the fourth mounting seat 3132b and the round tube 310, then connect the round tube 310 through the round hole of the second connecting seat 3131d to the first round steel 3131b, and finally insert a cotter pin through the positioning hole on the round tube 310 and the first round steel 3131b for fixation.

[0055] In one possible implementation, there are two ropes 30. One end of one rope 30 is fixedly connected to one end of the round tube 310 and wound around the round tube 310 before passing through all the vertical bars 201 of the ladder mechanism 2. The other end is then fixedly connected to a rope hole in the reinforced aluminum tube 11. The other rope 30 is similarly fixed vertically to the other end of the round tube 310 and another rope hole in the reinforced aluminum tube 11. The rotation of the handle 3131c is transmitted to the round tube 310 through the first round steel 3131b. The rotation of the round tube 310 drives the synchronous twisting of the two ropes 30, thereby controlling the extension and retraction of the ladder mechanism 2.

[0056] Specifically, when the climbing device is scaled, the effective length of the rope 30 in the ladder frame mechanism 2 is the target height of the climbing ladder.

[0057] The working process of the ladder climbing device provided by this utility model in actual application is as follows: When using the ladder, the handle 3131c is manually turned. The rotation of the handle 3131c is transmitted to the first round steel 3131b. The rotation of the first round steel 3131b directly drives the round tube 310 to release the two ropes 30, thereby increasing the length of the ropes 30 in the ladder frame mechanism 2 and providing sufficient extension space for the ladder. The ladder sections 20 that are extended and compressed together are adjusted. When a ladder section 20 is fully extended, the safety locking buttons at both ends of the step 200 of the next ladder section 20 are moved to the direction of the connecting sleeve 202 to lock the two ladder sections 20. In relative position, extend and lock section by section. When the ladder reaches the target height, ensure that each section 20 is locked. Then, turn the handle 3131c to wind the rope around the round tube 310 to retrieve the excess rope 30. Finally, move the limiting safety lock button 3131e to the direction of the handle 3131c and move it towards the first connecting seat 3131a through the second round steel 3131f to insert into the hole on the handle 3131c to limit the rotation of the handle 3131c. This completes the extension of the ladder device. If it is necessary to store or shorten the ladder device, simply reverse the above process.

[0058] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A manually adjustable ladder device, characterized in that, include: Ladder base frame (1); A ladder frame mechanism (2) is provided on the ladder base frame (1) and is used to connect two platforms at different elevations. The drive control mechanism (3) is provided with a rope (30) and a rope assembly (31). The rope (30) is used to provide tension to control the extension and retraction and position locking of the ladder mechanism (2). The rope assembly (31) is fixedly installed on the top of the ladder mechanism (2). The rope assembly (31) is used to control the extension and retraction and position locking of the ladder mechanism (2) by manually twisting the rope (30). The rope (30) is fixedly wound around the rope assembly (31) and passes through the ladder frame mechanism (2) and is fixed to the ladder base frame (1).

2. The manually adjustable ladder device according to claim 1, characterized in that, The ladder base frame (1) includes: Anti-slip seat (10), wherein there are two anti-slip seats (10); A reinforced aluminum tube (11) is provided, with both ends of the reinforced aluminum tube (11) nested and connected to the two anti-slip seats (10); The reinforced aluminum tube (11) has a rope hole at each end.

3. The manually adjustable ladder device according to claim 2, characterized in that, The ladder mechanism (2) is composed of multiple ladder sections (20) that are sequentially and retractably connected together; wherein the ladder section (20) includes: Step (200), the step (200) is fixed in the horizontal direction; Vertical rod (201), there are two vertical rods (201), and the two vertical rods (201) are respectively located at both ends of the step (200); Connecting sleeve (202), there are two connecting sleeves (202), the two connecting sleeves (202) are respectively sleeved on the top of the two vertical rods (201), and the two connecting sleeves (202) are fixedly connected to the two ends of the step (200); Safety lock button (203), the safety lock button (203) is embedded between the connecting sleeve (202) and the step (200), the safety lock button (203) cooperates with the connecting sleeve (202) to lock the nested upper step (20) at the target height after the upper step (20) is fully extended; Among them, the diameter of the vertical rod (201) in the multi-section ladder (20) decreases from bottom to top, and the vertical rods (201) of each section are nested and connected to realize the extension and retraction adjustment of the multi-section ladder (20).

4. The manually adjustable ladder device according to claim 3, characterized in that, The rope assembly (31) includes: A circular tube (310) is arranged in a horizontal direction, and a positioning hole is provided at one end of the circular tube (310); The upper step (311) is arranged horizontally below the circular tube (310); Vertical circular tube (312), there are two vertical circular tubes (312), both of which are arranged in the vertical direction; Mounting base (313), there are two mounting bases (313), and the two mounting bases (313) are installed on the upper ends of the two vertical round tubes (312); Both ends of the circular tube (310) and both ends of the upper step (311) are connected to the two mounting seats (313).

5. The manually adjustable ladder device according to claim 4, characterized in that, The mounting base (313) includes: The first mounting base (3131) is nested and connected to one end of the round tube (310) which has a positioning hole, and is used to provide the driving force for manual adjustment; The second mounting base (3132) is mounted on the circular tube (310) in correspondence with the first mounting base (3131) and is used to restrict the rotation of the circular tube (310).

6. The manually adjustable ladder device according to claim 5, characterized in that, The first mounting base (3131) includes: The first connecting seat (3131a) is connected to the circular tube (310) and the vertical circular tube (312) to limit their positions; A handle (3131c) for manual adjustment, wherein the handle (3131c) has a hole. The first round steel (3131b) is a cylindrical steel body. One end of the first round steel (3131b) is welded and fixed to the handle (3131c). The other end of the first round steel (3131b) is nested and connected to the first connecting seat (3131a). The part extending out of the first connecting seat (3131a) is precisely positioned and connected to the round tube (310). The rotation adjustment of the handle (3131c) is transmitted to the round tube (310) through the first round steel (3131b).

7. The manually adjustable ladder device according to claim 6, characterized in that, The first mounting base (3131) further includes: The second connecting seat (3131d) is bolted to the first connecting seat (3131a) to define the positions of the round tube (310), the vertical round tube (312), and the upper step (311); the second connecting seat (3131d) adds a fixing groove to the first connecting seat (3131a), and the fixing groove is used to connect the upper step (311). A motion-limiting safety lock button (3131e) is inserted into the second connecting seat (3131d) to limit the rotation of the handle (3131c); The second round steel bar (3131f) is connected to the second connecting seat (3131d) and the first connecting seat (3131a) through a round hole passing through the second connecting seat (3131d), and is used to cooperate with the motion-limiting safety lock button (3131e) to jointly limit the rotation of the handle (3131c); Spring (3131g); The fixing seat (3131h) is nested in the fixing seat (3131h), and the fixing seat (3131h) with the spring (3131g) embedded in it is inserted into the fixing groove of the second connecting seat (3131d). One end of the second round steel (3131f) is inserted into the fixed seat (3131h) in which the spring (3131g) is embedded, and the other end passes through the round hole of the second connecting seat (3131d). The second round steel (3131f) is horizontally moved in the fixed seat (3131h) and the second connecting seat (3131d) by the horizontal push of the limiting safety lock button (3131e). The limiting safety lock button (3131e) restricts the rotation of the handle (3131c) by driving the second round steel (3131f) to move towards the first connecting seat (3131a) and insert into the hole on the handle (3131c).

8. The manually adjustable ladder device according to claim 7, characterized in that, The second round steel (3131f) is divided into three cylindrical segments with different diameters. The first cylindrical segment, the second cylindrical segment, and the third cylindrical segment of the second round steel (3131f) are connected sequentially along the direction from the first connecting seat (3131a) to the second connecting seat (3131d). The first cylindrical segment has the largest diameter, the second cylindrical segment has the smallest diameter, and the third cylindrical segment has a diameter between the two. The second cylindrical segment is embedded and connected to the limiting safety lock button (3131e), which is used to transmit the movement of the limiting safety lock button (3131e) to the second round steel (3131f) and drive the second round steel (3131f) to move.

9. The manually adjustable ladder device according to claim 5, characterized in that, The second mounting base (3132) includes: Third connecting seat (3132a); The fourth connecting seat (3132b) is bolted to the third connecting seat (3132a) to define the positions of the round tube (310), the vertical round tube (312) and the upper step (311); The third connecting seat (3132a) has a rectangular cavity on the basis of the fourth connecting seat (3132b) for nesting and connecting the upper step (311).

10. The manually adjustable ladder device according to claim 6, characterized in that, The rope (30) consists of two ropes. One end of one rope (30) is fixedly connected to one end of the round tube (310) and wrapped around the round tube (310). The rope then passes through all the vertical rods (201) of the ladder mechanism (2) and the other end is fixedly connected to one rope hole of the reinforced aluminum tube (11). The other rope (30) is also fixed vertically to the other end of the round tube (310) and the other rope hole of the reinforced aluminum tube (11). The handle (3131c) rotates and transmits the rotation to the round tube (310) through the first round steel (3131b). The rotation of the round tube (310) drives the synchronous twisting of the two ropes (30), thereby controlling the extension and retraction of the ladder mechanism (2).

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