Multifunctional accommodation ladder

Abstract

The multifunctional gangway ladder comprises a retractable gangway ladder body, a circulating conveyor and a hanging basket, the retractable gangway ladder body is installed on a deck of a ship body and can be lowered to the ground of a lap joint wharf to serve as a passage for people to pass through or be hoisted and tied in a ship board, and the circulating conveyor is installed on the side edge of the retractable board and can be dumped for storage or erected for work; the whole hanging basket loaded with materials is hung on the circulating conveyor, and material connection between the wharf ground and the ship deck is achieved. The multifunctional gangway ladder has the functions of personnel passing and material conveying, and multiple functions of one device are achieved; by means of the change of the inclination angle, different height differences between a ship deck and the wharf ground can be adapted, and materials can be conveyed in the large-elevation-angle state of the gangway ladder through the hanging basket conveying mode. The material conveying function is integrated on the gangway ladder, an independent ship body connector does not need to be configured, no extra connector requirement exists, and the material conveying function is added to the equipped gangway ladder of the ship.

Description

Technical Field

[0001] The invention relates to ship logistics equipment, in particular to a multifunctional gangway. Background Art

[0002] The passage of personnel between the ship and the shore is generally completed through the gangway. Small packaged materials are carried on the shoulders and carried between the ship and the shore through the gangway. Large quantities of small packaged materials are generally loaded and unloaded in bulk through ramp conveyors, or repackaged into large packages and loaded and unloaded through gangways, cranes, quay cranes, etc.

[0003] Carrying materials on one's back or shoulder requires a significant amount of manpower, is time-consuming, and labor-intensive. Ramp conveyors are located at the dock and are not onboard facilities. Gangways, serving as a connection between ship and shore, lack their own power. Cranes, used for loading and unloading large packages, have high load capacities but low conveying efficiency. Quay cranes are dockside loading and unloading equipment specifically designed for loading and unloading containers. Large ships with large crews require a significant amount of food and other consumables for each voyage, often in small packages. Currently, there is little ship-to-shore docking equipment for loading and unloading small items. Gangways serve solely as access points, and bulk material transport relies on other equipment. There is no multifunctional equipment capable of simultaneously accommodating both personnel access and material transportation. Summary of the Invention

[0004] The present invention aims to address the problem of mechanized ship-to-shore transport of small packages by providing a multifunctional gangway ladder that functions both as a pedestrian and material transport platform. In use, it connects the ship's deck to the dock floor, facilitating both personnel access and material transfer. In the retracted state, it flips and folds, securing it to the deck surface inside the ship's side. This ladder can accommodate varying height differences between the deck and the dock floor, minimizing space requirements in the retracted state, requiring comparable space to a conventional gangway ladder.

[0005] To achieve the above-mentioned purpose, the technical solution of the present invention is: a multifunctional gangway ladder, including a retractable gangway ladder, a circulating conveyor, and a hanging basket. The retractable gangway ladder is installed on the hull deck and can be lowered to the dock ground to serve as a passage for personnel to pass or be hoisted and fastened inside the ship's side. The circulating conveyor is installed on the retractable side of the ship and can be dumped for storage or erected for work; the hanging basket loaded with materials is hung as a whole on the circulating conveyor to realize the material connection between the dock ground and the hull deck.

[0006] Furthermore, the retractable gangway ladder includes a winch device, a retractable frame device, a mooring frame device, a turning platform device, a rotating platform device, a folding platform device, and a ladder frame device; the winch device includes a winch assembly and a wire rope; the retractable frame device includes a fixed frame assembly and a turning frame assembly, which provides a running guide for the wire rope; the wire rope of the winch device is connected to the ladder frame device through the guide of the retractable frame device; the mooring frame device is connected between the turning platform device and the retractable frame device, and is used to fasten the multi-functional gangway ladder to the side of the ship in the retracted state; the turning platform device is installed on the deck surface of the hull with a hinge structure; the turning platform device is installed on the turning platform device and moves together with the turning platform of the turning platform device; the folding platform device is installed on the turning platform device, and is unfolded in the unfolded state for people to stand on, and folded on the turning platform of the turning platform device in the folded state to save storage space; the ladder frame device is hinged to the turning platform device and can rotate relative to the turning platform device under the drive of the winch device.

[0007] Furthermore, the flipping platform device includes a flipping platform and a flipping shaft. The end of the flipping shaft is connected to the flipping frame assembly of the retractable frame device and flips together. In the unfolded state, the flipping platform is parallel to the deck surface, and in the folded state, the flipping platform is perpendicular to the deck surface.

[0008] Furthermore, the circulating conveyor includes a tilting column device, a crossbeam device, a positioning rod device, a circulating guide rail device, a chain transmission device, a motor device, and a hanging rod device. There are multiple groups of tilting column devices, which are installed on one side of the ladder frame device. The bottom of the tilting column device forms a hinge structure with the ladder frame device, which can be tilted down or erected relative to the ladder frame device; the crossbeam device is connected to the top of each group of tilting column devices, and each connection part is a hinge structure. The crossbeam device, the tilting column device, and the ladder frame device form a parallelogram structure, and the crossbeam device can be laid down or erected; one end of the positioning rod device is hinged to the ladder frame device, and the other end is a movable end. When the tilting column device is erected into place, the movable end of the positioning rod device The moving end is quickly connected to the lower part of the tilting column device to keep the tilting column device and the beam device in the upright position; the circulating guide rail device is installed on the beam device, including a guide rail and a moving part, and the guide rail surrounds the beam device to form a closed-loop structure, and the moving part can circulate guided by the guide rail; the chain transmission device includes a sprocket and a chain, and the two sets of sprockets are respectively installed on the top of the two sets of tilting column devices and can rotate relative to the tilting column devices. The chain is put on the sprockets at both ends to form a closed loop, and the moving parts of the circulating guide rail device are connected to the chain at a certain distance; the motor device is fixedly installed on the top of a group of tilting column devices and is connected to the sprocket; the hanging rod device is connected to the moving part of the circulating guide rail device and can be quickly installed and disassembled.

[0009] Furthermore, the hanging basket includes a basket body, handles, and hooks. The basket body is used to load materials, and its inner and outer surfaces are both inclined; the handles are installed on the basket body, and two sets of handles form a triangular structure with the upper side of the basket body. People can maintain good stability by holding the handles when taking and placing; the hooks are installed on the handles, and the hooks can be quickly hung on the hanging rod device of the circulating conveyor, or removed from the hanging rod device.

[0010] Furthermore, when changing from the folded state to the unfolded state, the mooring frame device is untied, and the winch assembly releases the wire rope. As the wire rope is released, the turning frame assembly, the turning platform device, the revolving platform device, and the ladder frame device are flipped together to be parallel to the deck surface. The wire rope is further released, and the ladder frame device rotates relative to the revolving platform device until it overlaps the dock ground, completing the ship-shore connection and unfolding the folding platform device.

[0011] Furthermore, when changing from the folded state to the unfolded state, after the retractable gangway is fully unfolded, the tilting column device of the circulating conveyor is erected, the crossbeam device and the circulating guide rail device are erected, the positioning rod device is connected to the tilting column device, so that the circulating guide rail device is kept in the erected state, and the hanging rod device is quickly connected to the moving parts of the circulating guide rail device to complete the unfolding of the circulating conveyor.

[0012] Furthermore, during material transfer, personnel load the materials into a hanging basket, then hang the basket on the hanging rod device, start the circulating conveyor, and transport the basket. After arriving, personnel remove the basket and unload the materials. The empty basket can be transported back to the starting position. After the transfer is completed, all the baskets are removed. The interior and exterior of the baskets are inclined, allowing them to be stacked to save space.

[0013] Furthermore, when changing from the expanded state to the folded state, all the hanging rod devices are removed, the positioning rod device and the tilting column device are disconnected, the tilting column device, the beam device, and the circulating guide rail device are laid down, and the circulating conveyor is flush with the ladder frame device, thereby completing the folding of the circulating conveyor.

[0014] Furthermore, when changing from the unfolded state to the folded state, the folding platform device is folded, the winch assembly reels the wire rope, and the ladder frame device rotates relative to the slewing platform device until it is parallel to the deck surface. As the wire rope is reeled in, the turning frame assembly, the turning platform device, the slewing platform device, and the ladder frame device are turned together to be perpendicular to the deck surface, and then fastened to the mooring frame device.

[0015] It can be seen from the technical solution of the present invention that the present invention has the following technical effects:

[0016] The multifunctional gangway ladder of the present invention has the functions of both personnel passage and material transportation, thus realizing multiple functions of one device.

[0017] The multifunctional gangway of the present invention can adapt to different height differences between the ship deck and the dock ground by changing the inclination angle. The hanging basket transportation method can transport materials when the gangway is in a large elevation angle state.

[0018] The material conveying function of the present invention is integrated into the gangway, and does not require the configuration of a separate hull interface or additional interface requirements. The present invention is suitable for adding the material conveying function to a ship already equipped with a gangway.

[0019] The material conveying structure of the present invention is compact, occupies little space after being folded, basically maintains the appearance of the gangway, has a compact structure, is easy to process and manufacture, and has significant economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of the multifunctional gangway ladder of the present invention in the unfolded state (first viewing angle);

[0021] Figure 2 Schematic diagram of the structure of the multifunctional gangway ladder of the present invention in the unfolded state (second viewing angle);

[0022] Figure 3 Schematic diagram of the retractable gangway ladder of the present invention in a semi-expanded state (first viewing angle);

[0023] Figure 4 Schematic diagram of the retractable gangway ladder of the present invention in a semi-expanded state (second viewing angle);

[0024] Figure 5 It is a structural schematic diagram of the winch device and the retractable frame device of the present invention in the unfolded state;

[0025] Figure 6 It is a structural schematic diagram of the unfolded state of the retractable rack device and the flip platform device of the present invention;

[0026] Figure 7 Schematic diagram of the structure of the circulating conveyor of the present invention in the expanded state (first viewing angle);

[0027] Figure 8 Schematic diagram of the structure of the circulating conveyor of the present invention in the expanded state (second viewing angle);

[0028] Figure 9 It is a structural schematic diagram of the circulating conveyor of the present invention in a folded state;

[0029] Figure 10 This is a schematic structural diagram of the tilting column device of the present invention in a folded state;

[0030] Figure 11 It is a partial structural diagram of the circulating guide rail device and the chain transmission device of the present invention;

[0031] Figure 12 It is a structural schematic diagram of the hanging basket of the present invention;

[0032] Figure 13 Schematic diagram of the multifunctional gangway ladder of the present invention in the folded state (first viewing angle);

[0033] Figure 14 Schematic diagram of the multifunctional gangway ladder of the present invention in the folded state (second viewing angle);

[0034] In the figure: retractable gangway 1, circulating conveyor 2, hanging basket 3, winch device 11, retractable frame device 12, mooring frame device 13, tilting platform 1401 device 14, rotating platform device 15, folding platform device 16, ladder frame device 17, tilting column device 21, beam device 22, positioning rod device 23, circulating guide rail 2401 device 24, chain transmission device 25, motor device 26, hanging rod device 27, basket body 31, handle 32, hook 33, winch assembly 1101, wire rope 1102, fixed frame assembly 1201, tilting frame assembly 1202, tilting platform 1401, tilting shaft 1402, guide rail 2401, moving part 2402, sprocket 2501, chain 2502. DETAILED DESCRIPTION

[0035] The technical solution of the present invention is described in detail below with reference to the accompanying drawings.

[0036] like Figure 1 , 2, 13, and 14, the present invention provides a multifunctional gangway, comprising: a retractable gangway 1, a circulating conveyor 2, and a hanging basket 3. The retractable gangway 1 is installed on the hull deck and can be lowered to the dock ground, or hoisted and fastened inside the ship's side as a passage for personnel; the circulating conveyor 2 is installed on the side of the retractable gangway 1 and can be tilted for storage or erected for operation; the hanging basket 3 can be loaded with materials and hung on the circulating conveyor 2 as a whole, realizing the material connection between the dock ground and the hull deck; the retractable gangway 1, the circulating conveyor 2, and the hanging basket 3 are used to transport materials.

[0037] like Figures 3 to 6 As shown, the retractable gangway 1 includes a winch assembly 11, a retractable frame assembly 12, a mooring frame assembly 13, a tilting platform assembly 14, a slewing platform assembly 15, a folding platform assembly 16, and a ladder frame assembly 17. The winch assembly 11 includes a winch assembly 1101 and a wire rope 1102. The retractable frame assembly 12 includes a fixed frame assembly 1201 and a tilting frame assembly 1202, which provide a guide for the wire rope 1102.

[0038] The winch assembly 11, the retractable rack assembly 12, the mooring frame assembly 13, and the tilting platform assembly 14 are all mounted on the deck of the vessel. The steel wire rope 1102 of the winch assembly 11 is connected to the ladder frame assembly 17 via the guide of the retractable rack assembly 12. The mooring frame assembly 13 is connected between the tilting platform assembly 14 and the retractable rack assembly 12 and is used to secure the multifunctional gangway ladder to the ship's side when retracted.

[0039] The flip platform assembly 14 is hingedly mounted on the hull deck and comprises a flip platform 1401 and a flip shaft 1402. The end of the flip shaft 1402 is connected to the flip frame assembly 1202 of the stowage / retraction frame assembly 12, and the flip platform 1401 rotates together with the deck. In the deployed state, the flip platform 1401 is parallel to the deck surface, and in the retracted state, the flip platform 1401 is perpendicular to the deck surface.

[0040] The rotary platform device 15 is installed on the flip platform device 14 and moves together with the flip platform 1401.

[0041] The folding platform device 16 is installed on the flip platform device 14. In the unfolded state, it is unfolded for people to stand on. In the folded state, it is folded on the flip platform 1401 to save storage space.

[0042] The ladder device 17 is hinged to the rotary platform device 15 and can rotate relative to the rotary platform device 15 under the drive of the winch device 11;

[0043] After the mooring frame assembly 13 is released from the ladder assembly 17, the winch assembly 1101 is energized to release the wire rope 1102. The tilting frame assembly 1202 and the tilting platform 1401 assembly 14 rotate together to be parallel to the deck surface. Wire rope 1102 is further released, and the ladder assembly 17 rotates relative to the revolving platform assembly 15 until the bottom of the ladder assembly 17 touches the dock floor. The folding platform assembly 16 is then manually opened, completing the deployment of the retractable gangway 1. Once the retractable gangway 1 is deployed, personnel can board or disembark via the ladder assembly 17.

[0044] like Figures 7 to 11 As shown, the circulating conveyor 2 includes a tilting column assembly 21, a crossbeam assembly 22, a positioning rod assembly 23, a circulating guide rail assembly 2401, a chain transmission assembly 25, a motor assembly 26, and a hanging rod assembly 27. The circulating guide rail assembly 24 includes a guide rail 2401 and a moving part 2402. The chain transmission assembly 25 includes a sprocket 2501 and a chain 2502.

[0045] The bottoms of multiple sets of tilting column assemblies 21 are hingedly mounted on the ladder frame assembly 17 at regular intervals. Crossbeam assemblies 22 are hingedly mounted to the tops of each set of tilting column assemblies 21 at regular intervals. The ladder frame assembly 17, tilting column assemblies 21, and crossbeam assemblies 22 form a parallelogram structure. When folded, the structure is laid down. When deployed, the tilting column assemblies 21 are erected, and the lower portions of the tilting column assemblies 21 are then secured in the upright position by positioning rod assemblies 23. One end of the positioning rod assemblies 23 is hingedly mounted on the ladder frame assembly 17, and the other end is a movable end. Once the tilting column assemblies 21 are erected into position, the movable end of the positioning rod assemblies 23 quickly connects to the lower portions of the tilting column assemblies 21, maintaining the tilting column assemblies 21 and crossbeam assemblies 22 in the upright position. Two sets of sprockets 2501 are mounted on top of the two sets of tilting column assemblies 21, respectively, and can rotate relative to the tilting column assemblies 21. A chain 2502 is looped around the sprockets 2501 at both ends, forming a closed loop. The moving parts 2402 of the endless guide rail assembly 24 are connected to the chain 2502 at regular intervals. A motor assembly 26 is fixedly mounted on top of a set of tilting column assemblies 21 and connected to the sprockets 2501. A hanging rod assembly 27 is connected to the moving parts 2402 of the endless guide rail assembly 24, allowing for quick installation and removal.

[0046] The guide rail 2401 of the circulating guide rail assembly 24 surrounds the crossbeam assembly 22 to form a closed loop, and the moving parts 2402 can circulate around the guide rail 2401. A chain 2502 passes through two sets of sprockets 2501 to form a closed loop, and multiple sets of moving parts 2402 are connected to the chain 2502 at regular intervals. When the motor assembly 26 is energized and operated, it drives the sprockets 2501 to rotate, which in turn drives the chain 2502, which in turn drives the moving parts 2402 to circulate along the guide rail 2401, thereby driving the hanging rod assembly 27 to circulate.

[0047] like Figure 12 As shown, the hanging basket 3 consists of a basket body 31, handles 32, and hooks 33. The basket body 31 is used to carry materials and has a sloped inner and outer surface; it can be stacked for storage, saving space. The handles 32 are mounted on the basket body 31. Two sets of handles 32 form a triangular structure with the upper side of the basket body 31, allowing personnel to grasp the handles 32 for stable access. The hooks 33 are mounted on the handles 32 and can be quickly attached to and removed from the hanging rod assembly 27 of the endless conveyor 2.

[0048] During use, personnel load materials into the hanging basket 3, hang the hanging basket 3 on the hanging rod device 27, and run with the hanging rod device 27 to the end point. Personnel then unload the materials therein, completing the transportation of materials from the dock ground to the folding platform device 16.

[0049] After use, the tilting column device 21, the beam device 22, and the circulating guide rail 2401 device 24 are laid down together to realize the folding of the circulating conveyor 2, and then the winch device 11 is operated to lift and flip the ladder device 17 and the circulating conveyor 2, and fasten them to the mooring frame device 13 to complete the folding and storage of the entire equipment.

[0050] The operating principle of the present invention is as follows: the winch assembly 11 releases a wire rope 1102, causing the retractable gangway 1 to flip and lower to the dock surface, thereby connecting the ship's deck to the dock surface. The endless conveyor 2 then rises, and the motor assembly 26 drives the chain drive 25, which drags the moving member 2402 and the hanging rod assembly 27 along the guide rail 2401. The hanging basket 3, suspended from the hanging rod assembly 27, travels between the dock surface and the folding platform assembly 16, completing the material transport.

[0051] When transitioning from the stowed state to the deployed state, the mooring frame assembly 13 is untied, and the winch assembly 1101 pays out the wire rope 1102. As the wire rope 1102 is paid out, the tilting frame assembly 1202, the tilting platform assembly 14, the revolving platform assembly 15, and the ladder assembly 17 are tilted together to be parallel to the deck surface. The wire rope 1102 is further paid out, and the ladder assembly 17 rotates relative to the revolving platform assembly 15 until it contacts the dock surface, completing the ship-to-shore connection. The folding platform assembly 16 is then deployed.

[0052] When changing from the folded state to the unfolded state, after the retractable gangway 1 is fully unfolded, the tilting column device 21 of the circulating conveyor 2 is erected, the beam device 22 and the circulating guide rail device 24 are erected, the positioning rod device 23 is connected to the tilting column device 21, the circulating guide rail device 24 is kept in the erected state, and the hanging rod device 27 is quickly connected to the moving part 2402 of the circulating guide rail device 24 to complete the unfolding of the circulating conveyor 2.

[0053] When materials are transported, personnel load materials into the hanging basket 3, hang the hanging basket 3 on the hanging rod device 27, start the circulating conveyor, transport the hanging basket 3, and remove the hanging basket 3 after arrival to unload materials. The empty hanging basket 3 can be transported back to the starting position.

[0054] After the transfer is completed, all the hanging baskets 3 are removed. The interior and exterior of the hanging baskets 3 are both inclined, and they can be stacked and stored to save space.

[0055] When changing from the expanded state to the folded state, all the hanging rod devices 27 are removed, the positioning rod device 23 is disconnected from the tilting column device 21, the tilting column device 21, the beam device 22, and the circulating guide rail device 24 are laid down, and the circulating conveyor 2 is flush with the ladder device 17, completing the folding of the circulating conveyor 2.

[0056] When changing from the unfolded state to the folded state, the folding platform device 16 is folded, the winch assembly 1101 reels the wire rope 1102, and the ladder frame device 17 rotates relative to the revolving platform device 15 until it is parallel to the deck surface. As the wire rope 1102 is reeled in, the turning frame assembly 1202, the turning platform device 14, the revolving platform device 15, and the ladder frame device 17 are turned together to be perpendicular to the deck surface, and then fastened to the mooring frame device 13.

Claims

1. A multifunctional gangway, characterized by: It includes a retractable gangway, a circulating conveyor, and a hanging basket. The retractable gangway is installed on the hull deck and can be lowered to the dock ground to serve as a passage for personnel or lifted and fastened inside the ship's side. The circulating conveyor is installed on the retractable side and can be dumped for storage or erected for work; the hanging basket loaded with materials is hung on the circulating conveyor as a whole to realize the material connection between the dock ground and the hull deck.

2. The multifunctional gangway ladder according to claim 1, characterized in that: The retractable gangway ladder includes a winch device, a retractable frame device, a mooring frame device, a turning platform device, a rotating platform device, a folding platform device, and a ladder frame device; the winch device includes a winch assembly and a wire rope; the retractable frame device includes a fixed frame assembly and a turning frame assembly, which provides a running guide for the wire rope; the wire rope of the winch device is connected to the ladder frame device through the guide of the retractable frame device; the mooring frame device is connected between the turning platform device and the retractable frame device, and is used to fasten the multi-functional gangway ladder to the side of the ship in the retracted state; the turning platform device is installed on the deck surface of the hull with a hinge structure; the turning platform device is installed on the turning platform device and moves together with the turning platform of the turning platform device; the folding platform device is installed on the turning platform device, and is unfolded in the unfolded state for people to stand on, and folded on the turning platform of the turning platform device in the folded state to save storage space; the ladder frame device is hinged to the turning platform device and can rotate relative to the turning platform device under the drive of the winch device.

3. The multifunctional gangway ladder according to claim 2, characterized in that: The flipping platform device includes a flipping platform and a flipping shaft. The end of the flipping shaft is connected to the flipping frame assembly of the retractable frame device and flips together. In the unfolded state, the flipping platform is parallel to the deck surface, and in the folded state, the flipping platform is perpendicular to the deck surface.

4. The multifunctional gangway ladder according to claim 1, characterized in that: The circulating conveyor includes a tilting column device, a crossbeam device, a positioning rod device, a circulating guide rail device, a chain transmission device, a motor device, and a hanging rod device. There are multiple groups of tilting column devices, which are installed on one side of the ladder frame device. The bottom of the tilting column device forms a hinge structure with the ladder frame device, which can be tilted, laid down or erected relative to the ladder frame device; the crossbeam device is connected to the top of each group of tilting column devices, and each connection part is a hinge structure. The crossbeam device, the tilting column device, and the ladder frame device form a parallelogram structure, and the crossbeam device can be laid down or erected; one end of the positioning rod device is hinged to the ladder frame device, and the other end is a movable end. When the tilting column device is erected into place, the movable end of the positioning rod device It is quickly connected to the lower part of the tilting column device to keep the tilting column device and the beam device in the upright position; the circulating guide rail device is installed on the beam device, including a guide rail and a moving part, the guide rail surrounds the beam device to form a closed loop structure, and the moving part can circulate guided by the guide rail; the chain transmission device includes a sprocket and a chain, and the two sets of sprockets are respectively installed on the top of the two sets of tilting column devices and can rotate relative to the tilting column devices. The chain is put on the sprockets at both ends to form a closed loop, and the moving parts of the circulating guide rail device are connected to the chain at a certain distance; the motor device is fixedly installed on the top of a group of tilting column devices and is connected to the sprocket; the hanging rod device is connected to the moving part of the circulating guide rail device and can be quickly installed and disassembled.

5. The multifunctional gangway ladder according to claim 4, characterized in that: The hanging basket consists of a basket body, handles, and hooks. The basket body is used to load materials, and its inner and outer surfaces are both inclined; the handles are installed on the basket body, and two sets of handles form a triangular structure with the upper side of the basket body. People can maintain good stability by holding the handles when taking or placing the basket; the hooks are installed on the handles, and the hooks can be quickly hung on the hanging rod device of the circulating conveyor, or removed from the hanging rod device.

6. The multifunctional gangway ladder according to claim 3, characterized in that: When changing from the folded state to the deployed state, the mooring frame device is untied, and the winch assembly releases the wire rope. As the wire rope is released, the turning frame assembly, the turning platform device, the revolving platform device, and the ladder device are turned together to be parallel to the deck surface. The wire rope is further released, and the ladder device rotates relative to the revolving platform device until it overlaps the dock ground, completing the ship-shore connection and unfolding the folding platform device.

7. The multifunctional gangway ladder according to claim 3, characterized in that: When changing from the folded state to the unfolded state, after the retractable gangway is fully unfolded, the tilting column device of the circulating conveyor is erected, the crossbeam device and the circulating guide rail device are erected, the positioning rod device is connected to the tilting column device, the circulating guide rail device is kept in the erected state, the hanging rod device is quickly connected to the moving parts of the circulating guide rail device, and the unfolding of the circulating conveyor is completed.

8. The multifunctional gangway ladder according to claim 5, characterized in that: During material transfer, personnel load the materials into a hanging basket, then hang the basket on the hanging rod device, start the circulating conveyor, and transport the basket. Once the basket arrives, personnel remove the basket and unload the materials. The empty basket can be transported back to the starting position. After the transfer is completed, all the baskets are removed. The interior and exterior of the baskets are inclined, allowing them to be stacked to save space.

9. The multifunctional gangway ladder according to claim 8, characterized in that: When changing from the expanded state to the folded state, all the hanging rod devices are removed, the positioning rod device and the tilting column device are disconnected, the tilting column device, the beam device, and the circulating guide rail device are laid down, and the circulating conveyor is flush with the ladder frame device to complete the folding of the circulating conveyor.

10. The multifunctional gangway ladder according to claim 8, characterized in that: When changing from the unfolded state to the folded state, the folding platform device is folded, the winch assembly reels the wire rope, and the ladder frame device rotates relative to the slewing platform device until it is parallel to the deck surface. As the wire rope is reeled in, the turning frame assembly, the turning platform device, the slewing platform device, and the ladder frame device are turned together to be perpendicular to the deck surface, and then fastened to the mooring frame device.

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