Lightweight combined boarding ladder convenient to disassemble, assemble and maintain

Abstract

The utility model belongs to the technical field of ship equipment, and particularly discloses a light-weight combined boarding ladder convenient to disassemble, assemble and maintain, which comprises two parallel ladder assemblies, rollers are mounted at two ends of each ladder assembly, each roller is detachably connected with the ladder assembly through a connecting assembly, a plurality of groups of U-shaped pedals are arranged between the two ladder assemblies, and the pedals are connected with the ladder assemblies through connecting assemblies. The two sides of each set of pedals are detachably connected with the ladder frames, each ladder frame is detachably connected with a handrail, the handrails are perpendicular to the pedals, and meanwhile the ladder frames, the pedals and the handrails are all made of epoxy resin carbon fibers. According to the boarding ladder, the problems that a traditional boarding ladder is large in weight, inconvenient to maintain and high in maintenance cost are solved, the boarding ladder is light in weight, convenient to disassemble and assemble, good in ultraviolet resistance and salt mist resistance and low in maintenance cost, protective paint does not need to be sprayed regularly, and therefore the efficiency and economical efficiency of boarding operation are improved.

Description

Technical Field

[0001] This utility model belongs to the field of marine equipment technology, specifically relating to a lightweight modular boarding ladder that is easy to disassemble and maintain. Background Technology

[0002] In the field of ship operations, boarding ladders play a crucial role, serving as essential facilities to ensure the safe and efficient boarding and disembarking of vessels when they dock. Currently, boarding ladder designs are diverse, including straight ladders, fixed step ladders, curved step ladders, and four-bar linkage movable step ladders, among others. Among these, straight ladders are most common in ports and docks due to their relatively simple structure, primarily consisting of treads and handrails.

[0003] However, traditional boarding ladders are mostly constructed with a single, integrated metal structure, resulting in excessive weight. During actual handling, their weight often necessitates the use of lifting equipment for relocation, undoubtedly increasing manpower and time consumption. For example, in docks with limited space and scarce lifting equipment resources, moving such heavy boarding ladders can significantly delay the entire operation and reduce efficiency.

[0004] Furthermore, traditional boarding ladders face significant maintenance challenges. Due to their monolithic construction, when a component malfunctions or is damaged, maintenance personnel struggle to quickly and effectively repair the localized problem. In addition, because boarding ladders operate in a harsh marine environment, they must withstand salt spray corrosion and ultraviolet radiation. To protect against these adverse effects, their outer surface often requires protective coating, increasing material costs and further complicating maintenance, thus exacerbating the overall maintenance burden.

[0005] In summary, traditional boarding ladders have many problems that urgently need to be solved in terms of weight, ease of maintenance, and maintenance costs. Therefore, developing a lightweight, modular boarding ladder that is easy to disassemble and maintain has extremely important practical significance and value.

[0006] In view of this, this utility model is hereby proposed. Utility Model Content

[0007] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a lightweight modular boarding ladder that is easy to disassemble and maintain. It is mainly used to solve the problems of heavy weight, inconvenient maintenance and high maintenance cost of existing boarding ladders (straight board ladders), so as to provide a more convenient, efficient and economical boarding equipment for boarding operations.

[0008] The object of the present utility model is solved by the following technical solutions:

[0009] A lightweight combined boarding ladder provided by the present utility model, which is convenient for disassembly, installation and maintenance, includes two parallel ladder frames. At both ends of each ladder frame, rollers are installed, and each roller is detachably connected to the ladder frame through a connection component. Between the two ladder frames, multiple groups of "U"-shaped pedals are arranged, and both sides of each group of pedals are detachably connected to the ladder frame. An armrest is detachably connected to each ladder frame, and the armrest is vertically arranged with respect to the pedals.

[0010] Furthermore, the cross-section of the ladder frame is an inverted "eye" shaped cuboid structure, and foam boards are filled in the left and right cavities of the ladder frame.

[0011] Furthermore, at both ends of the ladder frame, a set of first connection holes connected to the connection component are horizontally penetrated. On the ladder frame, between the two sets of first connection holes, multiple groups of second connection holes connected to the pedals are horizontally penetrated. On the top wall of the ladder frame, multiple socket holes connected to the armrest are uniformly opened in the vertical direction.

[0012] Furthermore, the connection component includes a connection end connected to the ladder frame, an end plate connected to the connection end and having a cuboid structure, and a roller connection plate connected to the end plate and having a triangular structure;

[0013] Among them, at both ends of the connection end, first through holes are provided. One end of the connection end is inserted into the middle hole of the inverted "eye" shape of the ladder frame, and is connected to the ladder frame by bolts passing through the first connection holes and the first through holes;

[0014] On the upper end of the end plate, a shelling area is provided. On both side walls of the shelling area, second through holes matching the number and position of the first through holes are provided. The end of the connection end extending out of the ladder frame is inserted into the shelling area, and is fixedly connected to the end plate by bolts. On the lower end of the end plate, a hollowed-out area for weight reduction is provided, and a third through hole is provided at the bottom of the hollowed-out area;

[0015] On the top of the roller connection plate, fourth through holes matching the number and position of the third through holes are provided. The roller connection plate is connected to the end plate by bolts. On the lower end of the roller connection plate, a clearance area is provided, and fifth through holes are provided at both ends of the clearance area for rotatably connecting to the rollers arranged in the clearance area.

[0016] Furthermore, on both side walls of the pedal, sixth through holes matching the second connection holes are opened along the length direction thereof, and the pedal is connected to the ladder frame by bolts passing through the sixth through holes and the second connection holes.

[0017] [[ID=

[0018] Furthermore, the handrail is a tubular frame structure, and the bottom of the handrail is provided with multiple connecting rods, and the center distance between two adjacent connecting rods is the same as the center distance between two adjacent socket holes. The bottom end of each connecting rod is provided with a plug-in component for connecting to the ladder frame.

[0019] Furthermore, the connector comprises, from top to bottom, a stepped section, a tapered section, and a cylindrical section. A limiting flange is provided between the stepped section and the tapered section. The stepped section is fixedly connected to the connecting rod. The diameter of the cylindrical section is less than or equal to the inner diameter of the socket.

[0020] Furthermore, the cylindrical section is provided with internal threads, and the ladder frame is provided with a seventh through hole at the other end opposite to the socket hole. After the cylindrical section of the connector is inserted into the socket hole, it is screwed to the internal threads by a bolt passing through the seventh through hole, and the inner diameter of the seventh through hole is smaller than the nut diameter of the bolt.

[0021] Furthermore, the ladder frame, steps, and handrails are all made of epoxy resin carbon fiber.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The boarding ladder provided by this utility model mainly consists of a ladder frame, rollers, connecting components, steps, and handrails. All components are detachably connected. Key load-bearing components such as the ladder frame, steps, and handrails are made of epoxy resin carbon fiber material. Compared with existing technologies, the advantages of this boarding ladder are mainly reflected in the following aspects:

[0024] Firstly, it is lightweight: the ladder frame, steps and handrails are made of epoxy resin carbon fiber. The material has high strength and low density characteristics, which reduces the weight by about 40%-60% compared with the traditional metal structure boarding ladder. At the same time, the ladder frame and handrails are hollow structures, and the hollow structures on the left and right sides of the ladder frame are filled with foam boards. While ensuring strength and rigidity, the weight is further reduced. This significantly reduces the reliance on hoisting equipment in the handling, installation and dismantling process, and the labor and material costs can be effectively controlled. Moreover, on the ship, its layout is more convenient and its movement is more flexible and free, which greatly improves the overall efficiency of ship operations.

[0025] Secondly, it is easy to assemble and disassemble: In this boarding ladder, the rollers are detached from the ladder frame through connecting components; the steps are firmly connected to the two side walls of the ladder frame with bolts, making the operation efficient and convenient; the handrails rely on connecting rods with special structure plugs and are tightly connected to the ladder frame with bolts, so that both the installation process and subsequent possible disassembly needs can be completed quickly and smoothly.

[0026] Third, maintenance costs are low: Because the overall structure uses detachable connections, any malfunctioning component can be quickly located, repaired, or replaced, reducing maintenance workload and difficulty. Furthermore, unlike traditional boarding ladders, there is no need for complex protective paint spraying (resin containing protective agents), reducing material costs and maintenance complexity, extending the service life of the boarding ladder, and lowering overall maintenance costs from multiple perspectives, thus improving the economic efficiency of the boarding ladder. Attached Figure Description

[0027] The accompanying drawings are incorporated in and form part of this specification, and together with the description, serve to explain the principles of this invention.

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the overall structure of the boarding ladder of this utility model;

[0030] Figure 2 This is a schematic diagram of the connection between the ladder frame and the connecting end in the boarding ladder of this utility model;

[0031] Figure 3 yes Figure 2 Enlarged schematic diagram of the cross-section of the middle ladder frame;

[0032] Figure 4 yes Figure 2 Enlarged view of the middle section;

[0033] Figure 5 This is a schematic diagram of the end plate structure of the connecting assembly of this utility model;

[0034] Figure 6 This is a schematic diagram of the connection end, end plate and ladder frame in the connection assembly of this utility model;

[0035] Figure 7 This is a schematic diagram of the roller connecting plate structure in the connecting assembly of this utility model;

[0036] Figure 8 This is a schematic diagram of the connection between the rollers, connecting components, and ladder frame in this utility model;

[0037] Figure 9 This is an assembly diagram of the parallel ladder, rollers, and connecting components in this utility model;

[0038] Figure 10 This is a schematic diagram of the pedal structure in this utility model;

[0039] Figure 11 This is a schematic diagram of the connection between the tread and the ladder frame in this utility model;

[0040] Figure 12 This is a schematic diagram of the handrail structure in this utility model;

[0041] Figure 13 yes Figure 12 Schematic diagram of the bottom support structure of the center armrest;

[0042] Figure 14 This is a schematic diagram of the connection between the handrail and the ladder frame in this utility model;

[0043] Figure 15 This is a cross-sectional schematic diagram of the support plug and ladder frame fixing in this utility model.

[0044] in:

[0045] 1 is the ladder frame; 11 is the first connecting hole; 12 is the second connecting hole; 13 is the socket hole; 14 is the seventh through hole;

[0046] 2 represents a roller;

[0047] 3 is the connecting component; 31 is the connecting end; 32 is the end plate; 33 is the roller connecting plate; 311 is the first through hole; 321 is the shell extraction area; 322 is the second through hole; 323 is the hollow area; 324 is the third through hole; 331 is the fourth through hole; 332 is the clearance area; 333 is the fifth through hole;

[0048] 4 is the pedal; 41 is the sixth through hole; 42 is the anti-slip protrusion;

[0049] 5 is the handrail; 51 is the connecting rod; 52 is the plug-in connector; 521 is the platform stage; 522 is the tapered section; 523 is the cylindrical section; 524 is the limiting flange; 5231 is the internal thread;

[0050] 6 represents foam board. Detailed Implementation

[0051] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this invention. Rather, they are merely examples of apparatuses consistent with some aspects of this invention as detailed in the appended claims.

[0052] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0053] Please see Figures 1-15 , a lightweight combined boarding ladder provided by an embodiment of the present utility model, which is easy to disassemble, assemble and maintain, includes two ladder frames 1 arranged in parallel. At both ends of each ladder frame 1, rollers 2 are installed, and each roller 2 is detachably connected to the ladder frame 1 through a connection component 3. Between the two ladder frames 1, multiple groups of "U"-shaped pedals 4 are arranged, and both sides of each group of pedals 4 are detachably connected to the ladder frames 1. An armrest 5 is detachably connected to each ladder frame 1, and the armrest 5 is perpendicularly arranged with respect to the pedals 4. In addition, the ladder frames 1, pedals 4 and armrests 5, which bear the main load-bearing function, are all made of epoxy resin carbon fiber composite materials. This material not only endows the above components with excellent strength performance and can effectively withstand various forces generated when personnel board and disembark the ladder, but also greatly reduces the weight of the entire boarding ladder due to its low-density characteristics, making the boarding ladder more convenient and efficient during operations such as handling, installation and disassembly, and effectively enhancing the practicability and flexibility of the boarding ladder, providing a more ideal facility guarantee for the personnel boarding link in ship operations.

[0054] Specifically, as Figure 2 、 4 shown, in the embodiment of the present utility model, the cross-section of the ladder frame 1 presents an inverted "eye" - shaped cuboid structure after rotating 90 degrees. To effectively strengthen the stiffness and strength characteristics of the ladder frame 1, foam boards 6 are filled in the left and right cavities of the ladder frame 1. In addition, at both ends of the ladder frame 1, a set of first connection holes 11 connected to the connection component 3 are horizontally penetrated (it should be noted that the number and size of all holes in the present utility model can be set according to the actual needs of the connecting parts, that is, the holes can be single or group holes); in the area of the ladder frame 1 between two sets of first connection holes 11, multiple groups of second connection holes 12 connected to the pedals 4 are also horizontally penetrated; and in addition, a plurality of socket holes 13 connected to the armrest 5 are evenly opened in the vertical direction on the top wall of the ladder frame 1. These structural designs and layouts ensure from multiple aspects that the ladder frame 1 can be stably connected to other components and lay a solid foundation for the stability and reliability of the entire boarding ladder.

[0055] In the embodiment of the present utility model, the connection component 3 includes a connection end 31 connected to the ladder frame 1, an end plate 32 connected to the connection end 31 and having a cuboid structure, and a roller connection plate 33 connected to the end plate 32 and having a triangular structure. Among them, the connection end 31 has a cuboid hollow structure, and first through holes 311 are provided at both ends. One end of the connection end 31 is inserted into the middle "mouth" hole of the inverted "eye" shape of the ladder frame 1, and is connected to the ladder frame 1 through a bolt passing through the connection hole 11 and the first through hole 311; the other end protrudes from the ladder frame 1 and is used to connect to the end plate 32, as Figure 3 shown. The structure of the end plate 32 is as Figure 5As shown, its upper end is provided with a shell extraction area 321. The two side walls of the shell extraction area 321 are provided with second through holes 322 that match the number and position of the first through holes 311. One end of the connecting end 31 extending out of the ladder frame 1 is inserted into the shell extraction area 321 and fixedly connected to the end plate 32 by bolts. Figure 6 As shown; the lower end of the end plate 32 is provided with a hollow area 323 for weight reduction, and a third through hole 324 is provided at the bottom of the hollow area 323. The structure of the roller connecting plate 33 is as follows. Figure 7 As shown, a fourth through hole 331 is provided on the top of the roller connecting plate 33, which matches the number and position of the third through hole 324. The roller connecting plate 33 is connected to the end plate 32 by bolts. A clearance area 332 is provided at the lower end of the roller connecting plate 33. The width of the clearance area 332 is greater than the width of the roller 2. A fifth through hole 333 is provided at both ends of the clearance area 332 for rotating connection with the roller 2 provided in the clearance area 332.

[0056] like Figure 8 As shown, when connecting the roller 2, connecting assembly 3, and ladder frame 1, firstly, the end plate 32 is connected to the connecting end 31 fixed at the end of the ladder frame 1 using bolts; then, after the corresponding surfaces of the end plate 32 and the roller connecting plate 33 come into contact, bolts are passed through the third through hole 324 of the end plate 32 and the fourth through hole 331 of the roller connecting plate 33, and fixed with nuts to achieve the connection between the end plate 32 and the roller connecting plate 33; finally, the roller 2 is inserted into the clearance area 332 of the roller connecting plate 33 and rotated to be mounted on the roller connecting plate 33. The overall structure after assembly is as follows. Figure 9 As shown. The design of this connecting component 3 not only ensures the robustness and reliability of the connection between the components, but also takes into account the rationality of the structure and the requirements of lightweighting, effectively improving the overall performance and practicality of the boarding ladder.

[0057] In the embodiments of this utility model, such as Figure 10 As shown, the side walls of the step 4 have sixth through holes 41 along their length that match the second connecting holes 12 of the ladder frame 1. By passing bolts through the sixth through holes 41 and the second connecting holes 12, a stable connection between the step 4 and the ladder frame 1 can be achieved. The main surface of the step 4 has an integrally formed anti-slip protrusion 42. This integrated design has two advantages: firstly, it eliminates the need for additional anti-slip pads and corresponding connectors, effectively reducing the weight of the entire boarding ladder, aligning with the lightweight design concept; secondly, the integrally formed anti-slip protrusion 42 significantly increases the rigidity of the step, effectively improving its structural strength. This eliminates the need for additional reinforcing ribs or other components on the back of the step, further optimizing the structural design, reducing the number and complexity of components, lowering production costs and assembly difficulty, and also reducing potential malfunctions caused by an increase in components. Multiple steps 4 connected to the ladder frame 1 can... Figure 11 As shown.

[0058] In the embodiments of this utility model, such as Figure 12 As shown, the handrail 5 is designed as a tubular frame structure, with three connecting rods 51 spaced at the bottom. The center distance between two adjacent connecting rods 51 is the same as the center distance between two adjacent socket holes 13. Each connecting rod 51 has a connector 52 at its bottom end that connects to the ladder frame 1. It should be noted that the connector 52 is made of metal and is integrally formed with the handrail 5 as a pre-embedded part during its manufacture. This process has the following advantages: First, the integral design effectively reduces the number of connectors, lowering safety hazards caused by loose or damaged connectors, and greatly improving the overall stability and reliability of the handrail structure. Second, reducing the number of connectors also makes the installation of the handrail 5 simpler and faster, effectively saving assembly time and labor costs. At the same time, the metal connector 52 has good strength and durability, ensuring that the handrail 5 maintains a stable connection with the ladder frame 1 during long-term use.

[0059] Specifically, such as Figures 13-15 As shown, the connector 52 includes, from top to bottom, a platform section 521, a tapered section 522, and a cylindrical section 523. A limiting flange 524 is provided between the platform section 521 and the tapered section 522. The limiting flange 524 is used to contact the surface of the ladder frame 1 to achieve the limiting function. Part or all of the upper platform section 521 is embedded in the tubular structure of the handrail 5. The diameter of the cylindrical section 523 is less than or equal to the inner diameter of the socket 13.

[0060] Most importantly, an internal thread 5231 is provided inside the cylindrical section 523, and a seventh through hole 14 is provided on the ladder frame 1 at the other end opposite to the socket 13. Thus, when the cylindrical section 523 of the connector 52 is inserted into the socket 13, a bolt is threaded through the seventh through hole 14 and connected to the internal thread 5231, achieving a reliable connection between the handrail 5 and the ladder frame 1. Furthermore, the inner diameter of the seventh through hole 14 is smaller than the diameter of the bolt nut to prevent the bolt from coming out of the seventh through hole 14, further ensuring the strength and stability of the connection. This unique connector 52 structure and the matching ladder frame 1 connection design make the connection between the handrail 5 and the ladder frame 1 both convenient and stable. While ensuring the overall structural strength of the boarding ladder, it also facilitates the installation, disassembly, and maintenance of the handrail 5, laying a solid foundation for the long-term stable use of the boarding ladder.

[0061] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this utility model.

[0062] It should be understood that this utility model is not limited to the content already described above, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. A lightweight, modular boarding ladder that is easy to disassemble and maintain, characterized in that, It includes two ladder frames (1) arranged in parallel. At both ends of each ladder frame (1), rollers (2) are installed, and each roller (2) is detachably connected to the ladder frame (1) through a connection component (3). Between the two ladder frames (1), multiple groups of "U"-shaped pedals (4) are provided, and both sides of each group of pedals (4) are detachably connected to the ladder frame (1). An armrest (5) is detachably connected to each ladder frame (1), and the armrest (5) is perpendicularly arranged with respect to the pedal (4).

2. The lightweight, modular boarding ladder that is easy to disassemble and maintain according to claim 1, characterized in that, The cross-section of the ladder frame (1) is an inverted "eye" - shaped cuboid structure, and foam boards (6) are filled in the left and right cavities of the ladder frame (1).

3. The lightweight, modular boarding ladder that is easy to disassemble and maintain according to claim 2, characterized in that, At both ends of the ladder frame (1), a set of first connection holes (11) connected to the connection component (3) are horizontally penetrated. On the ladder frame (1), between the two sets of first connection holes (11), multiple sets of second connection holes (12) connected to the pedal (4) are horizontally penetrated. On the top wall of the ladder frame (1), a plurality of socket holes (13) connected to the armrest (5) are uniformly opened in the vertical direction.

4. The lightweight, modular boarding ladder that is easy to disassemble and maintain according to claim 3, characterized in that, The connection component (3) includes a connection end (31) connected to the ladder frame (1), an end plate (32) connected to the connection end (31) and having a cuboid structure, and a roller connection plate (33) connected to the end plate (32) and having a triangular structure; Among them, at both ends of the connection end (31), first through-holes (311) are provided. One end of the connection end (31) is inserted into the middle hole of the inverted "eye" - shaped ladder frame (1), and is connected to the ladder frame (1) by bolts passing through the first connection hole (11) and the first through-hole (311); At the upper end of the end plate (32), a shelling area (321) is provided. On both side walls of the shelling area (321), second through-holes (322) matching the number and position of the first through-holes (311) are provided. The end of the connection end (31) extending out of the ladder frame (1) is inserted into the shelling area (321), and is fixedly connected to the end plate (32) by bolts. At the lower end of the end plate (32), a hollowed - out area (323) for weight reduction is provided, and a third through-hole (324) is provided at the bottom of the hollowed - out area (323); At the top of the roller connection plate (33), fourth through-holes (331) matching the number and position of the third through-holes (324) are provided. The roller connection plate (33) is connected to the end plate (32) by bolts. At the lower end of the roller connection plate (33), a clearance area (332) is provided, and fifth through-holes (333) are provided at both ends of the clearance area (332) for rotatably connecting with the roller (2) arranged in the clearance area (332).

5. The lightweight, modular boarding ladder for easy disassembly and maintenance as described in claim 3, characterized in that, On both side walls of the pedal (4), sixth through-holes (41) matching the second connection holes (12) are opened along its length direction, and are connected to the ladder frame (1) by bolts passing through the sixth through-holes (41) and the second connection holes (12).

6. The lightweight, modular boarding ladder for easy disassembly and maintenance according to claim 1, characterized in that, Anti-slip protrusions (42) are provided on the surface of the pedal (4).

7. The lightweight, modular boarding ladder for easy disassembly and maintenance as described in claim 3, characterized in that, The handrail (5) is a tubular frame structure. The bottom of the handrail (5) is provided with multiple connecting rods (51), and the center distance between two adjacent connecting rods (51) is the same as the center distance between two adjacent socket holes (13). The bottom end of each connecting rod (51) is provided with a plug-in part (52) that connects to the ladder frame (1).

8. The lightweight, modular boarding ladder for easy disassembly and maintenance according to claim 7, characterized in that, The connector (52) includes, from top to bottom, a platform section (521), a tapered section (522), and a cylindrical section (523). A limiting flange (524) is provided between the platform section (521) and the tapered section (522). The platform section (521) is fixedly connected to the connecting rod (51). The diameter of the cylindrical section (523) is less than or equal to the inner diameter of the socket (13).

9. The lightweight, modular boarding ladder for easy disassembly and maintenance according to claim 8, characterized in that, The cylindrical section (523) is provided with an internal thread (5231). The ladder frame (1) is provided with a seventh through hole (14) at the other end opposite to the socket hole (13). After the cylindrical section (523) of the plug-in (52) is inserted into the socket hole (13), it is screwed to the internal thread (5231) by passing through the seventh through hole (14) with a bolt. The inner diameter of the seventh through hole (14) is smaller than the nut diameter of the bolt.

10. The lightweight, modular boarding ladder that is easy to disassemble and maintain according to any one of claims 1 to 9, characterized in that, The ladder frame (1), treads (4) and handrails (5) are all made of epoxy resin carbon fiber.

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