A suspended type ladder platform device for air duct work

Abstract

This invention discloses a suspended ladder platform device for ventilation duct operations, belonging to the field of shipbuilding technology. The device includes a platform support assembly and a working platform. The support assembly is suspended from the first rung of a vertical ladder via hooks. Its horizontal frame, combined with diagonal and vertical braces, forms a triangular support structure. A U-shaped support clip with a pin is located below the vertical brace and engages with the second rung. The working platform is hinged to the horizontal frame via a first hinge and can be designed as an integrated, double-folding, multi-folding, or arc-shaped structure. The platform surface uses a diamond-shaped steel mesh and is equipped with anti-slip edges. This device requires no welding, is quick to install and disassemble, adaptable to conventional ladder spacing, can compensate for installation errors, has strong load-bearing capacity, and a high safety factor. It is suitable for high-altitude operations in confined spaces such as ship ventilation ducts, narrow cabins, and equipment shafts, exhibiting excellent versatility and practicality.

Description

Technical Field

[0001] This invention relates to a suspended ladder platform device for ductwork operations, which belongs to the field of shipbuilding technology. Background Technology

[0002] In shipbuilding, marine engineering equipment installation, and maintenance of various industrial facilities, it is often necessary to perform high-altitude operations in confined spaces such as ship ventilation ducts, narrow cabins, and equipment shafts. These work scenarios, characterized by narrow spaces, limited operating range, and high working heights, present numerous challenges to the construction process.

[0003] Existing technologies for high-altitude operations in confined spaces have significant shortcomings: Traditional scaffolding requires extensive welding, consuming large quantities of steel pipes, fasteners, and other materials, leading to high construction costs. Furthermore, the cumbersome and time-consuming setup and dismantling processes severely impact overall construction progress, particularly in projects with stringent time constraints, such as shipbuilding. On the other hand, in some work scenarios, workers can only operate suspended using ladders, lacking effective support platforms. This results in poor stability, reducing efficiency and precision, and posing a significant risk of falls, seriously threatening worker safety. In addition, existing auxiliary work devices suffer from poor versatility, a narrow range of compatible ladder spacing, inconvenient installation and dismantling, and insufficient load-bearing capacity, failing to meet the actual needs of different work scenarios. Summary of the Invention

[0004] To address the problems of cumbersome platform setup and poor platform versatility in existing technologies, this invention provides a support device for high-altitude operations in confined spaces that is easy to install, highly versatile, safe, reliable, and economical.

[0005] A suspended ladder platform device for duct operation includes a platform support assembly and a working platform, characterized in that: the platform support assembly is suspended and fixed to the first step of the vertical ladder by a set of hooks; In the platform support assembly, two sets of straight braces are fixedly installed on one side of the horizontal frame, and the straight braces are attached to the vertical ladder; the bottom ends of the two sets of straight braces are fixedly connected by horizontal braces; diagonal braces are symmetrically installed at both ends of the horizontal braces, and the other end of the diagonal braces is connected to the side of the horizontal frame away from the vertical ladder; the straight braces, diagonal braces and the horizontal frame form a triangular support structure. Hooks are fixedly installed at the straight support connection of the horizontal frame, and a set of U-shaped support clips with openings facing the vertical ladder are installed on the bottom side of the straight support; the U-shaped support clips are used to engage with the second step, and a locking pin is provided at the opening of the U-shaped support clips. The horizontal frame is connected to the hook, and a set of diagonal braces are set at the lower end of the horizontal frame away from the vertical ladder, forming a triangular support structure with the straight brace on the lower side of the horizontal frame near the hook. Below the straight support, there is a set of U-shaped support clips with openings that engage with the second step rod on the vertical ladder, and pins are used to fix them in place. The work platform is mounted on a platform support assembly, and on the side away from the vertical ladder, it is hinged to the horizontal frame using a first hinge.

[0006] Furthermore, a horizontal brace is provided in the middle of the set of U-shaped support clips, and a frame horizontal brace is provided inside the horizontal frame. Furthermore, the work platform has a folding structure, consisting of two platform units, with adjacent platform units hinged together by a second hinge.

[0007] Furthermore, the work platform is an arc shape adapted to a circular vertical ladder passage.

[0008] Furthermore, the work platform has a multi-fold structure, comprising three or more platform units, with the hinges between the units staggered along the width of the platform.

[0009] Furthermore, the surface of the work platform is made of diamond-shaped steel mesh, and the platform edges are equipped with anti-slip guards.

[0010] Compared with the prior art, the present invention has the following advantages: 1. Convenient and efficient installation: Compared with traditional scaffolding construction methods, this device does not require welding. Through the cooperation of hook components, support components and quick-release pins, installation and disassembly can be completed quickly, reducing installation time by 80%, significantly shortening the construction cycle and improving overall construction efficiency.

[0011] 2. Excellent safety performance: The device has a maximum load capacity of 150kg, which can meet the load-bearing requirements of a single person working at the same time. With the addition of a double safety locking device, anti-slip pads and anti-slip edges, it can fully protect the personal safety of the workers and effectively reduce the risk of falling from heights.

[0012] 3. High versatility: It can be adapted to a step spacing of about 400mm, which can meet the installation requirements of similar specifications of straight ladders. It is suitable for high-altitude operation scenarios in various confined spaces such as ship ventilation ducts, narrow cabins, and equipment shafts, and has a wide range of applications. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the platform's supporting components; Figure 2 This is a diagram illustrating the use of platform support components; Figure 3 A schematic diagram of the work platform; Figure 4 This is a schematic diagram of a folding work platform; Figure 5 This is a schematic diagram of a multi-folding work platform; Figure 6 This is a schematic diagram of the use of a cylindrical vertical ladder passage.

[0015] In the picture: 1. Platform support components; 11. Horizontal frame; 12. Hook; 13. Support clip; 14. Diagonal brace; 15. Vertical brace; 16. Horizontal brace; 17. Pin; 18. Frame horizontal brace. 21. Vertical ladder passage; 22. Vertical ladder; 221. Ladder beam; 222. Step; 2221. First step; 2222. Second step; 3. Working platform; 31. First hinge; 32. Second hinge; 33. Third hinge. Detailed Implementation

[0016] A suspended ladder platform device for ductwork operations is disclosed, which is attached to a vertical ladder 22 via a platform support assembly 1, and an openable and closable working platform is mounted on the platform support assembly 1. This device can flexibly adapt to errors during the installation of the vertical ladder, ensuring the flatness and stability of the installation.

[0017] like Figure 1 , 2 As shown, the platform support component 1 is a single-sided bearing unit, with one side attached to the vertical ladder 22 to support the working platform 3 above.

[0018] The horizontal frame 11 is a rectangular frame structure extending in the front-to-back direction, forming the top load-bearing base of the support assembly. Vertical braces 15 are vertically positioned, connecting to the rear of the horizontal frame 11 at their upper ends. Diagonal braces 14 are diagonally positioned, connecting to the front of the horizontal frame 11 at their upper ends and to the lower part of the vertical braces 15 at their lower ends. Support clips 13 open rearward and are located at the intersection of the vertical braces 15 and the diagonal braces 14. The diagonal braces 14, vertical braces 15, and the rear section of the horizontal frame 11 together form a triangular load-bearing structure, evenly distributing the load of the work platform 3 to the upper and lower steps, ensuring the stability and load-bearing capacity of the structure. Horizontal braces 16 connect the two sets of triangular load-bearing structures, ensuring the spacing meets the requirements of the ladder beam 221 spacing.

[0019] The hook 12 is fixedly installed on the upper rear side of the horizontal frame 11. It is a C-shaped hook structure with the opening facing downward. The inner diameter of the slot is adapted to the outer diameter of the step 222 of the vertical ladder 22. It can be fastened to the step 222 from top to bottom to form the upper suspension force point.

[0020] The support clip 13 is located directly below the hook 12 and has a slot structure facing backward. It is used to abut against the front side of the lower foot rod 222 to form a lower support force point. The front end of the slot of the support clip 13 has a pin hole and a matching pin 17. After the pin 17 is inserted, it can close the slot opening of the support clip 13, restrict the foot rod 222 inside the slot, and prevent the device from coming out.

[0021] The pin 17 has a bent structure at the end, which can achieve self-locking after insertion, eliminating the need for additional fasteners and facilitating quick installation and disassembly.

[0022] The frame cross brace 18 is set inside the horizontal frame 11 to increase support for the work platform 3.

[0023] In addition, the connection positions of each component of the platform support assembly 1 are reserved with assembly gaps, which allow for position compensation of ±5mm in the horizontal and vertical directions. This can flexibly adapt to manufacturing and installation errors during the installation of the straight ladder, ensuring the flatness and firmness of the device after installation.

[0024] When mounting and using platform support component 1, such as Figure 2 As shown, a vertical ladder 22 is fixedly installed inside the vertical ladder passage 21. The vertical ladder 22 includes ladder beams 221 arranged parallel on both sides, and multiple steps 222 vertically fixed between the two ladder beams 221. The steps are evenly arranged vertically. The first step 2221 at the top and the second step 2222 adjacent below it are used to hang the platform support assembly 1. The vertical spacing between the hooks and support clips of this device is adapted to the spacing between the two steps.

[0025] When mounting the platform support component 1 onto the vertical ladder 22, follow these steps: S1. First, move the platform support component 1 towards the vertical ladder 22, so that the upper hook 12 is aligned with the first step 2221. From top to bottom, fully engage the C-shaped slot with the first step 2221 to complete the upper suspension positioning. S2. Adjust the angle of the support component so that the slot of the lower support card 13 is aligned with the front side of the second foot rod 2222. Push the support component forward so that the second foot rod 2222 is fully embedded in the slot of the support card 13 and abuts against the inner wall of the slot to form the lower support. S3. Insert pin 17 into the pin hole at the front end of support card 13 to close the card slot opening and complete the locking.

[0026] After loading, hook 12 bears vertical tension, and support clip 13 bears vertical support force and lateral limiting force. Combined with the triangular load-bearing frame, the overall structure is stable and will not sway or detach. A single-sided vertical ladder with platform support component 1 provides stable support for the work platform. Example 1

[0027] like Figure 3 As shown, when there is sufficient space in the stairwell passage and there is no need to frequently fold or retract the work surface, an integrated work platform 3 can be used.

[0028] Work platform 3 is a rectangular flat plate structure, with the main body welded from 2.75mm thick diamond-shaped steel mesh, providing excellent anti-slip performance and structural strength while reducing overall weight for easy handling and installation. Raised anti-slip guardrails are installed along the platform edges to prevent workers from slipping or tools from rolling off, improving operational safety.

[0029] During installation, the work platform 3 is placed horizontally on top of the horizontal frames 11 of two symmetrically mounted platform support components 1. The left and right sides of the work platform 3 are aligned and fitted with the horizontal frames 11 on both sides. At the far end of the vertical ladder 22, the work platform 3 is connected to the horizontal frames 11 using the first hinge. The work platform 3 can be opened upwards and placed against the inside of the vertical ladder passage 21, forming a climbing passage. Workers can climb up the vertical ladder to the platform via the horizontal frames, cover the work platform 3 on the horizontal frames 11, and then carry out construction work on the platform. The device can meet the operating space requirements for single-person operation, and the maximum load-bearing capacity of the entire device can reach 150kg. Example 2

[0030] like Figure 4 As shown, the work platform 3 can be a double-folding work platform 3.

[0031] The work platform 3 consists of two platform units of the same size. The adjacent sides of the two platform units are hinged together by the second hinge 32. The two platform units can be rotated up and down around the hinge axis. The first hinge 31 is hinged to the horizontal frame 11 at the far end of the hook 12.

[0032] During normal passage, the platform unit closest to the vertical ladder 22 can be folded up and folded away to expose the passage opening in the middle, through which workers can climb the vertical ladder normally. When the working height is reached and work is required, the folded platform unit can be unfolded downwards and aligned with the platform unit on the other side to form a complete horizontal working surface, which can then be placed on the platform support component 1 for use.

[0033] When a larger passage space is needed, the platform unit on the side closest to the vertical ladder 22 can be folded up and folded away, and then opened up together with another platform unit and placed against the inner side of the vertical ladder passage 21.

[0034] The hinges are load-bearing hinges with sufficient shear strength to ensure the load-bearing capacity after the platform is unfolded; after the platform is unfolded, the joints fit tightly without obvious gaps, preventing tools from falling or feet from getting stuck. Example 3

[0035] like Figure 5 As shown, a multi-folding work platform 3 can be adopted. In this embodiment, it is a three-fold structure, which includes three platform units. Adjacent units are hinged to each other by the second hinge 32 and the third hinge 33, respectively. The first hinge 31 is used to hinge the hook 12 to the horizontal frame 11 at the far end.

[0036] To avoid lateral interference when multiple platform units are folded, the three hinges are staggered to ensure that the flipping directions of each platform unit are alternately staggered.

[0037] When in use, carry the folded platform to the working height, unfold each platform unit in sequence to form a complete working surface, and place it on the platform support component 1; after the work is completed, it can be folded up section by section without occupying the passage space of the stairwell. Example 4

[0038] like Figure 6 As shown, when the work scenario is a cylindrical vertical ladder passage 21, the inner wall of the passage is an arc surface, the internal space is cramped, and the radial dimension is limited. In this case, a folding work platform 3 is used to adapt to the scenario.

[0039] A vertical ladder 22 is provided on one side of the cylindrical vertical ladder passage 21, and the passage is surrounded by a closed cylindrical wall. During installation, the platform support assembly 1 is hung on the vertical ladder 22, and then the folded work platform 3 is unfolded and placed on the platform support assembly 1.

[0040] The foldable feature of the foldable work platform can adapt to the limited space of cylindrical passages: when folded, it can pass smoothly through narrow areas in the passage, and when unfolded, it can cover the working area in the passage, providing a stable operating platform for workers and solving the problem of difficulty in setting up work platforms in confined spaces such as cylindrical air ducts and circular shafts.

[0041] After the work is completed, first fold up the work platform, then pull out pin 17, lift up the platform support component 1, and then disengage the support clip 13 and hook 12 in sequence to quickly dismantle the device. No open flame work is required throughout the process, and it will not cause damage to the passage structure or the ladder.

[0042] The bottom support clips 13 and 17 are made of 304 stainless steel wire, which has good corrosion resistance and structural strength. The wire ends can be bent to achieve self-locking, which facilitates quick installation and disassembly, improves construction efficiency, and ensures the reliability of the pin connection.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A suspended ladder platform device for ductwork operations, comprising a platform support assembly (1) and a working platform (3), characterized in that: The platform support component (1) is suspended and fixed to the first step (2221) of the vertical ladder (22) by a set of hooks (12); In the platform support component (1), two sets of straight supports (15) are fixedly installed below one side of the horizontal frame (11), and the straight supports (15) are attached to the vertical ladder (22); the bottom ends of the two sets of straight supports (15) are fixedly connected by horizontal supports (16); the two ends of the horizontal supports (16) are symmetrically provided with diagonal supports (14), and the other end of the diagonal supports (14) is connected to the side of the horizontal frame (11) away from the vertical ladder (22); the straight supports (15), diagonal supports (14) and the horizontal frame (11) constitute a triangular support structure; Hooks (22) are fixedly installed at the straight support connection of the horizontal frame (11), and a set of U-shaped support clips (13) with openings facing the vertical ladder (22) are installed on the bottom side of the straight support (15); the U-shaped support clips (13) are used to engage with the second step (2222), and a locking pin (17) is provided at the opening of the U-shaped support clips (13). The horizontal frame (11) is connected to the hook (22). A set of diagonal braces (14) is set at the lower end of the horizontal frame (11) away from the vertical ladder (22), forming a triangular support structure with the straight brace (15) on the lower side of the horizontal frame (11) near the hook (12). The work platform (3) is mounted on the platform support assembly (1), and the side away from the vertical ladder (22) is hinged to the horizontal frame (11) using a first hinge (31).

2. The suspended ladder platform device for ductwork operations according to claim 1, characterized in that: The horizontal frame (11) is provided with a frame cross brace (18).

3. The suspended ladder platform device for ductwork operations according to claim 1, characterized in that: The work platform (3) has a folding structure, consisting of two platform units, which are hinged together by a second hinge (32).

4. The suspended ladder platform device for ductwork operations according to claim 3, characterized in that: The work platform (3) is an arc shape adapted to the circular vertical ladder channel (21).

5. A suspended ladder platform device for ductwork operations according to claim 1, characterized in that: The work platform (3) has a multi-fold structure, comprising three or more platform units, with the hinges between the units staggered along the width of the platform.

6. The suspended ladder platform device for ductwork operations according to any one of claims 1-5, characterized in that: The surface of the work platform (3) is made of diamond-shaped steel mesh, and the platform edge is provided with anti-slip guards.

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