A modular external scaffolding ladder
The modular design of the external scaffolding ladder solves the problems of inflexible height adjustment and insufficient stability of traditional ladders, enabling flexible height adjustment and stable anchoring, simplifying the operation process, and improving ease of use and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA CONSTR SECOND ENG BUREAU LTD
- Filing Date
- 2025-04-17
- Publication Date
- 2026-05-26
AI Technical Summary
Traditional modular ladders have inflexible height adjustment, and the hooks cannot flexibly match the support structure as the height changes, resulting in reduced stability and complicated operation. Disassembly and assembly are time-consuming and labor-intensive.
The modular three-section ladder design, with its hinged folding structure and detachable hook system, allows for flexible height adjustment and stable anchoring. The hooks can be installed and removed on different sections of the ladder using pin hinges, angle steel limit connectors, and threaded hole locking, making it suitable for various working scenarios.
It enables flexible adjustment of ladder height and stable anchoring, simplifies the operation process, and improves the convenience and safety of use.
Smart Images
Figure CN224282487U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of ladder technology, and more specifically, to a combined external frame climbing ladder. Background Technology
[0002] In the fields of construction, industrial maintenance, and high-altitude operations, modular ladders play a crucial role as vertical or inclined climbing tools. However, the design of traditional modular ladders has some inherent limitations. These ladders are usually composed of several fixed-length ladder sections connected by bolts or pins, and their height adjustment depends entirely on the preset combination of sections, resulting in an inflexible adjustment method. In addition, the hooks or anchor points of traditional ladders are often fixed on a single ladder section. When the ladder height changes, these hooks cannot flexibly match the new support structure, thereby reducing the overall stability. What is even more inconvenient is that every time the ladder height needs to be adjusted, it needs to be disassembled and reassembled, which is not only time-consuming and labor-intensive, but also increases the complexity of operation and safety risks. Utility Model Content
[0003] To overcome the above deficiencies, this utility model provides a combined external scaffolding ladder to solve the aforementioned problems.
[0004] This utility model is implemented as follows:
[0005] A modular external scaffolding ladder includes a first ladder, a second ladder, a third ladder, and two hooks. The first ladder has a first hinge at its top, and the second ladder has a second hinge at its bottom. The first and second hinges are hinged together by a pin to form a folded shape. Angle steel limiting connectors are detachably provided on both sides of the top of the first ladder. The third ladder is movably located in front of either the first or second ladder. The top ends of the two square tubes of the second ladder have a first pair of connecting pipes, and the top ends of the two square tubes of the third ladder have a second pair of connecting pipes identical to the first pair of connecting pipes. The two hooks are detachably mounted on the angle steel limiting connectors, the first pair of connecting pipes, or the second pair of connecting pipes.
[0006] In an embodiment of this utility model, the bottom of the first ladder is provided with movable foot supports.
[0007] In an embodiment of this utility model, the movable support includes an angle iron frame, and the two square tubes of the first ladder have through holes near the bottom. The angle iron frame is hinged in the through holes, and a rubber pad is provided at the bottom of the angle iron frame. The bottom of the rubber pad has wedge-shaped patterns.
[0008] In an embodiment of this utility model, the angle steel limiting connector is fixed to the outside of the first ladder near the bottom by bolts, and its other side extends upward. When the first ladder is rotated and unfolded along the pin to be parallel to the first ladder, the second ladder abuts against the angle steel limiting connector.
[0009] In an embodiment of this utility model, a first right-angle limiting plate is symmetrically arranged on the front side of the two square tubes of the first ladder near the top, and three limiting plates of the same size as the first right-angle limiting plate are arranged on the front side of the two square tubes of the second ladder, including a third right-angle limiting plate and a fourth right-angle limiting plate near the top, and a second right-angle limiting plate near the middle of the second ladder. The front side of the first right-angle limiting plate, the third right-angle limiting plate and the fourth right-angle limiting plate are respectively provided with a first threaded hole, a second threaded hole and a third threaded hole.
[0010] In an embodiment of this utility model, the front sides of the two square tubes of the third ladder are provided with three sets of movable holes, including a second movable hole and a third movable hole near the bottom side, and a first movable hole near the top side. When the first movable hole on the third ladder is coaxial with the first threaded hole of the first ladder, it is fixed by hand-tightening screws. When the second movable hole and the third movable hole on the third ladder are coaxial with the second threaded hole and the third threaded hole respectively, they are fixed by hand-tightening screws.
[0011] In embodiments of this utility model, the angle steel limiting connector is made of Q345B type low alloy steel or 6061-T6 aluminum alloy.
[0012] The beneficial effects of this utility model are as follows: This solution achieves flexible adjustment through the modular combination of three-section ladders and a detachable hook system. The specific connection method includes a first ladder and a second ladder with a hinged folding structure. The two are hinged by a pin shaft, supporting the adjustment of the ladder when fully folded to a 180-degree angle. After unfolding, the ladder is stopped by an angle steel limiting connector to prevent excessive rotation. The second ladder and the third ladder achieve height extension through sliding and threaded hole locking. The square tube of the third ladder can slide along several right-angle limiting plates on the first and second ladders and be fixed in the preset movable hole position by hand-tightening screws to form a multi-level height combination. At the same time, the hook can be detachably installed on the angle steel limiting connector, the first pair of pipes of the second ladder or the second pair of pipes of the third ladder, and fixed by bolts to achieve dynamic adjustment of the hook with the height of the ladder, adapting to different support structures. This combination method can cover a variety of working scenarios, solve the problem of fixed hook position and inability to adjust with height in traditional ladders, and ensure stable anchoring at different heights. Attached Figure Description
[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0014] Figure 1 An exploded structural diagram of a combined external scaffolding ladder provided for an embodiment of this utility model;
[0015] Figure 2 A schematic diagram of the structure of the movable foot support provided for an embodiment of this utility model;
[0016] Figure 3 A schematic diagram of the structure of Embodiment 1 provided for the implementation of this utility model;
[0017] Figure 4 A schematic diagram of the structure of Embodiment 2 provided for the implementation of this utility model;
[0018] Figure 5 This is a schematic diagram of the structure of Embodiment 3 provided for the implementation of this utility model.
[0019] In the diagram: 10. First ladder; 11. First hinge; 12. Angle iron limiting connector; 13. First right-angle limiting plate; 1301. First threaded hole; 14. Movable foot support; 1401. Angle iron frame; 1402. Rubber pad; 20. Second ladder; 21. Second hinge; 22. Second right-angle limiting plate; 23. Third right-angle limiting plate; 2301. Second threaded hole; 24. Fourth right-angle limiting plate; 2401. Third threaded hole; 25. First connecting pipe; 30. Third ladder; 31. First movable hole; 32. Second movable hole; 33. Third movable hole; 34. Second connecting pipe; 40. Hook. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0022] like Figure 1 As shown, this utility model provides a combined external scaffolding ladder, comprising a first ladder 10, a second ladder 20, a third ladder 30, and two hooks 40. The first ladder 10 has a first hinge 11 at its top, and the second ladder 20 has a second hinge 21 at its bottom. The first hinge 11 and the second hinge 21 are hinged together by a pin to form a folded shape. Angle steel limiting connectors 12 are detachably provided on both sides of the top of the first ladder 10. The third ladder 30 is movably positioned in front of either the first ladder 10 or the second ladder 20. The top ends of the two square tubes of the second ladder 20 are provided with first connecting pipes 25, and the top ends of the two square tubes of the third ladder 30 are provided with second connecting pipes 34, which are identical to the first connecting pipes 25. The two hooks 40 are detachably mounted on the angle steel limiting connectors 12, the first connecting pipes 25, or the second connecting pipes 34. The three-section ladder in this design is easy to assemble, and it is more convenient to reassemble based on the construction height. Furthermore, the positions of the two hooks 40 can be reassembled on any ladder to ensure overall stability.
[0023] As a preferred embodiment, such as Figure 2 As shown, the bottom of the first ladder 10 is provided with a movable foot support 14, which is used to increase the contact area between the ladder and the ground, thereby increasing the stability of the support.
[0024] Specifically, the movable support 14 includes an angle iron frame 1401. Two square tubes of the first ladder 10 have through holes near the bottom. The angle iron frame 1401 is hinged in the through holes. The hinged design helps to better fit the support surface and increase stability. A rubber pad 1402 is provided at the bottom of the angle iron frame 1401. The bottom of the rubber pad 1402 is provided with wedge-shaped texture. The rubber pad and the wedge-shaped texture that helps to increase friction ensure the stability of the ladder during its erection and use.
[0025] In this embodiment, the angle steel limiting connector 12 is fixed to the outside of the first ladder 10 by bolts on the side near the bottom, and extends upward on the other side. When the first ladder 10 is rotated and unfolded along the pin to be parallel to the first ladder 10, the second ladder 20 abuts against the angle steel limiting connector 12.
[0026] Furthermore, the first ladder 10 has a first right-angle limiting plate 13 symmetrically arranged on the front side of the two square tubes near the top, and the second ladder 20 has three limiting plates of the same size as the first right-angle limiting plate 13 arranged on the front side of the two square tubes, including a third right-angle limiting plate 23 and a fourth right-angle limiting plate 24 near the top, and a second right-angle limiting plate 22 near the middle of the second ladder 20. The front sides of the first right-angle limiting plate 13, the third right-angle limiting plate 23 and the fourth right-angle limiting plate 24 are respectively provided with a first threaded hole 1301, a second threaded hole 2301 and a third threaded hole 2401.
[0027] Furthermore, the front sides of the two square tubes of the third ladder 30 are provided with three sets of movable holes, including a second movable hole 32 and a third movable hole 33 near the bottom, and a first movable hole 31 near the top. When the first movable hole 31 on the third ladder 30 is coaxial with the first threaded hole 1301 of the first ladder 10, it is fixed by hand-tightening screws. When the second movable hole 32 and the third movable hole 33 on the third ladder 30 are coaxial with the second threaded hole 2301 and the third threaded hole 2401 respectively, they are fixed by hand-tightening screws.
[0028] Example 1, as Figure 3 As shown, the second ladder 20 is fully folded in the same position as the first ladder 10. At this time, the third ladder 30 is movably positioned in front of the first ladder 10. The first movable hole 31 on the third ladder 30 is coaxial with the first threaded hole 1301 on the first right-angle limiting plate 13. A hand-tightened screw is used to pass through the two and fix them. Furthermore, the two hooks 40 are fixed to the outside of the two angle steel limiting connectors 12 with bolts. The assembly is then complete, and the ladder can be erected and fixed at a lower position.
[0029] Example 2, as Figure 4 As shown, based on Example 1, the second climbing frame is fully deployed. At this time, the second climbing frame abuts against the angle steel limiting connector 12. The hook 40 is removed from the angle steel limiting connector 12, inserted into the first pair of pipes 25, and fixed with bolts. During the erection process, the second climbing ladder 20 is supported by the angle steel limiting connector 12, that is, it is assembled into a climbing ladder that can be erected at a higher position.
[0030] Example 3, as Figure 5As shown, based on Embodiment 2, loosen the hand-tightened bolts at the third climbing frame and the first climbing frame, slide the third climbing ladder 30 upward, and pass through the first right-angle limiting plate 13 and the second right-angle limiting plate 22 in sequence, until the second movable hole 32 and the third movable hole 33 on the third climbing ladder 30 are coaxial with the threaded holes on the third right-angle limiting plate 23 and the second right-angle limiting plate, respectively. At this time, fix it with hand-tightened screws so that the third climbing ladder 30 is fixed to the upper end of the second climbing ladder 20. Further, insert the two hooks 40 into the second connecting pipe 34 and fix them with bolts, that is, assemble a climbing ladder that can be erected at a higher position.
[0031] It should be noted that the angle steel limiting connector 12 is made of Q345B type low alloy steel or 6061-T6 aluminum alloy. When the ladder is erected at an angle, the angle steel limiting connector 12 is subjected to a large radial force, which can easily cause it to bend and deform, thus reducing the overall stability of the ladder. Therefore, the material of the angle steel limiting connector 12 is selected to be a material with a yield strength greater than that of conventional steel.
[0032] Based on the above three embodiments, this modular external scaffolding ladder solves the problem of inconvenient disassembly of existing combinations by optimizing the connection method of the three ladder sections. At the same time, the hook 40 is separated and a connection position is set at the upper end of each ladder section, which can be flexibly combined according to the actual situation and is more convenient to use.
[0033] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made by those skilled in the art to the above embodiments after reading this specification are all within the scope of protection of the present invention.
Claims
1. A combined external scaffolding ladder, characterized in that, The system includes a first ladder (10), a second ladder (20), a third ladder (30), and two hooks (40). The first ladder (10) has a first hinge (11) at its top and a second hinge (21) at its bottom. The first hinge (11) and the second hinge (21) are hinged together by a pin to form a folded shape. Angle steel limiting connectors (12) are detachably provided on both sides of the top of the first ladder (10). The third ladder (30) is movably provided on the front side of the first ladder (10) or the second ladder (20). The top ends of the two square tubes of the second ladder (20) are provided with a first pair of connecting pipes (25). The top ends of the two square tubes of the third ladder (30) are provided with a second pair of connecting pipes (34) that are the same as the first pair of connecting pipes (25). The two hooks (40) are detachably provided on the angle steel limiting connectors (12), the first pair of connecting pipes (25), or the second pair of connecting pipes (34).
2. The combined external scaffolding ladder according to claim 1, characterized in that, The bottom of the first ladder (10) is provided with a movable foot support (14).
3. A combined external scaffolding ladder according to claim 2, characterized in that, The movable support (14) includes an angle iron frame (1401). The two square tubes of the first ladder (10) have through holes on the side near the bottom. The angle iron frame (1401) is hinged in the through holes. A rubber pad (1402) is provided at the bottom of the angle iron frame (1401). The bottom of the rubber pad (1402) is provided with wedge-shaped patterns.
4. A combined external scaffolding ladder according to claim 1, characterized in that, The angle steel limiting connector (12) is fixed to the outside of the first ladder (10) by bolts on the side near the bottom, and extends upward on the other side. When the first ladder (10) is rotated and unfolded along the pin to be parallel to the first ladder (10), the second ladder (20) abuts against the angle steel limiting connector (12).
5. A combined external scaffolding ladder according to claim 1, characterized in that, The first ladder (10) has a first right-angle limiting plate (13) symmetrically arranged on the front side of the two square tubes near the top. The second ladder (20) has three limiting plates of the same size as the first right-angle limiting plate (13) on the front side of the two square tubes, including a third right-angle limiting plate (23) and a fourth right-angle limiting plate (24) near the top, and a second right-angle limiting plate (22) near the middle of the second ladder (20). The front sides of the first right-angle limiting plate (13), the third right-angle limiting plate (23) and the fourth right-angle limiting plate (24) are respectively provided with a first threaded hole (1301), a second threaded hole (2301) and a third threaded hole (2401).
6. A combined external scaffolding ladder according to claim 5, characterized in that, The front side of the two square tubes of the third ladder (30) is provided with three sets of movable holes, including a second movable hole (32) and a third movable hole (33) near the bottom, and a first movable hole (31) near the top. When the first movable hole (31) on the third ladder (30) is coaxial with the first threaded hole (1301) of the first ladder (10), it is fixed by hand-tightening screws. When the second movable hole (32) and the third movable hole (33) on the third ladder (30) are coaxial with the second threaded hole (2301) and the third threaded hole (2401) respectively, they are fixed by hand-tightening screws.
7. A combined external scaffolding ladder according to claim 1, characterized in that, The angle steel limiting connector (12) is made of Q345B type low alloy steel or 6061-T6 aluminum alloy.