Large floating repair ship wharf boarding safety transition ladder device

Abstract

This invention discloses a safe transition ladder device for boarding large floating repair vessels at a dock, relating to the field of boarding ladder technology. It includes: a support assembly comprising a base with a movable cavity and a retractable cavity inside; a sliding groove at the rear end of the retractable cavity; two first limiting rods at the upper and lower parts of the retractable cavity; and a ladder plate at the front end of the base; and a lifting assembly including a support column connected to the top of the base. Through the linkage structure of the retractable plate, rack plate, gear, bidirectional threaded rod, and other components, when the lifting platform rises, causing the first side ladder to move backward along with the U-shaped plate and retractable plate, the rack plate drives the gear and bidirectional threaded rod to rotate, thereby causing the retractable plates and side support plates on both sides to move in opposite directions. This automatically expands the contact area between the equipment and the ground, thus synchronously increasing the support area according to the increase in lifting height, significantly improving the device's anti-overturning stability.

Description

Technical Field

[0001] This invention relates to the field of boarding ladder technology, specifically to a safe transition ladder device for boarding large floating repair vessels at a dock. Background Technology

[0002] A large floating repair wharf is a shore-based facility specifically designed for ship repair, maintenance, and conversion. It typically employs a floating pontoon or high-pile wharf structure and can accommodate tankers, container ships, bulk carriers, and special-purpose engineering vessels of hundreds of thousands of tons. Unlike conventional cargo or passenger wharves, the core operations of a floating repair wharf include: hull structure welding and cutting, underwater rust removal and painting, propulsion system and rudder system overhaul, generator and electrical equipment maintenance, and deck machinery and loading / unloading equipment replacement. During floating repair wharf operations, a safe and reliable boarding transition device must be installed between the wharf and the vessel to ensure the smooth and efficient embarkation and disembarkation of maintenance personnel, technicians, safety supervisors, and various small and medium-sized goods.

[0003] Existing boarding transition devices at docks and on ships commonly include fixed gangways, telescopic boarding ladders, and hydraulic rotating boarding ladders. Some boarding ladders, to accommodate vessels of varying heights, require raising the lifting platform to a higher position, allowing docking with large vessels with a depth exceeding twenty meters. This allows workers to enter the interior of the large vessel via the boarding ladder. However, increasing the height of the lifting platform raises the overall center of gravity of the device, while the base support area remains fixed. This makes the equipment prone to capsizing under the influence of movement or waves, posing a significant safety hazard. Furthermore, due to the dock's proximity to the sea, the air humidity above the dock is high, resulting in a wet surface on the boarding ladder after docking with a large vessel. Although existing boarding ladders have handrails on both sides for fall protection, they lack active protection devices to stabilize the body and prevent falls or collisions in case of slips, thus providing insufficient protection for the personal safety of workers. Therefore, this application proposes a safe boarding transition ladder device for large floating repair vessels at docks to solve the aforementioned problems. Summary of the Invention

[0004] The purpose of this invention is to provide a safe transition ladder device for boarding large floating repair vessels at the dock, in order to solve the problems mentioned in the background art, such as the risk of the device tipping over due to the increased overall center of gravity and the inability to actively protect workers from falls.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A safety transfer ladder device for boarding large floating repair vessels at a dock includes: A support assembly includes a base, the base having a movable cavity and a retractable cavity inside, the retractable cavity having a sliding groove at its rear end, the retractable cavity having two first limiting rods at its upper and lower parts respectively, and the base having a ladder plate at its front end; The lifting assembly includes a support column connected to the top of the base. The support column has two second limiting rods at its front and rear ends, and lifting blocks are slidably arranged on the outer surfaces of the four second limiting rods. Lifting platforms are provided on both sides of the lifting blocks. A guardrail is provided on the top of the lifting platform. A second rotating rod is rotatably arranged inside the front end of the lifting platform. A support frame is provided on the top of the support column. A drive motor is provided at the front end of the support frame. A control roller is provided on the outer surface of the output shaft of the drive motor. A lifting rope connected to the top of the lifting block is provided on the outer surface of the control roller. A stair-climbing assembly includes a movable plate slidably connected to four first limiting rods. The front end of the movable plate is provided with a U-shaped plate, and a first rotating rod is rotatably arranged inside the front end of the U-shaped plate. The outer surface of the first rotating rod is provided with a first side ladder connected to the outer surface of a second rotating rod. The boarding assembly includes a boss connected to the rear end of a lifting platform. First telescopic controllers are provided on both sides of the boss. A ladder slot is provided at the top of the boss, and a first fixed rod is provided inside the ladder slot. An inclined ladder, rotatably connected to the output ends of the two first telescopic controllers, is rotatably mounted on the outer surface of the first fixed rod. Four protective components are provided at the top of the inclined ladder. A second telescopic controller is provided at the bottom of the inclined ladder. A second fixed rod is provided inside the inclined ladder. A second side ladder is rotatably mounted on the outer surface of the second fixed rod. A passive component connected to the second telescopic controller is provided at the bottom of the second side ladder. A ship-connecting assembly is rotatably mounted inside the second side ladder.

[0006] Furthermore, a bidirectional threaded rod is rotatably provided at the center of the movable cavity, a gear is provided at the center of the outer surface of the bidirectional threaded rod, movable plates are threadedly connected to both sides of the outer surface of the bidirectional threaded rod, a horizontal plate is provided at the top of the movable plate, and a side support plate is provided on the side of the horizontal plate away from the gear.

[0007] Furthermore, a third limiting rod is provided at the front and rear ends inside the movable cavity, and the movable plate is slidably sleeved on the third limiting rod.

[0008] Furthermore, the rear end of the movable plate is provided with a rack plate, the top of which meshes with the outer surface of the gear.

[0009] Furthermore, the top of the U-shaped plate is provided with a moving groove, and a third rotating rod is rotatably arranged inside the moving groove. The outer surface of the third rotating rod is provided with a moving wheel, and the bottom of the moving wheel is in contact with the top of the ladder plate.

[0010] Furthermore, a T-shaped plate is provided at the bottom of the sliding groove, and the top of the T-shaped plate is slidably connected to the bottom of the rack plate.

[0011] Furthermore, the boat-connecting assembly includes a fourth rotating rod, the outer surface of which is provided with a grooved plate, and a fifth rotating rod is rotatably mounted in three slots at the bottom of the grooved plate. The outer surface of the fifth rotating rod is provided with a movable block, and the bottom of the movable block is provided with an electric suction plate.

[0012] Furthermore, the protective component includes a protective frame, a fixing plate on the top of the protective frame, an orifice-shaped cavity inside the fixing plate, a slide rail at the top center of the orifice-shaped cavity, limiting plates at the front and rear ends of the slide rail, an orifice-shaped groove on the side wall of the orifice-shaped cavity, and locking grooves at the top and bottom of the lower part of the orifice-shaped groove.

[0013] Furthermore, a movable block is slidably disposed inside the cavity, a limiting groove is formed at the center of the outer surface of the movable block, and slots are formed on both sides of the top of the limiting groove. The limiting groove slides in cooperation with the outer surface of the limiting plate, and the slots slide in cooperation with the outer surface of the slide rail.

[0014] Furthermore, the side wall of the movable block is provided with a protective plate, and a sixth rotating rod is rotatably arranged inside the protective plate. A connecting roller plate is provided at the end of the sixth rotating rod away from the movable block. A torsion spring rod is rotatably arranged on the inner wall of the connecting roller plate. A connecting barrel is provided on the outer surface of the torsion spring rod. A spring guard is provided on the outer surface of the connecting barrel. A buckle block is provided at the end of the spring guard away from the movable block. A double cam is provided on the outer surface of the sixth rotating rod. Springs are respectively provided in the upper and lower parts of the inner cavity of the protective plate. A wheel plate is provided near the double cam side of the spring. A locking rod is provided on the wheel plate away from the double cam side. The locking rod can be inserted into the locking groove.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention, through the setting of the second rotating rod and the first side guard ladder, enables the top of the second rotating rod to move upward when the lifting block carries the lifting platform upward, and its bottom pushes the U-shaped plate and the movable plate to move backward, thereby automatically adjusting the tilt angle of the first side guard ladder. No matter what height the lifting platform is at, the first side guard ladder can always form a continuous and stable access channel without manual intervention, and has strong adaptability.

[0016] 2. This invention utilizes a coordinated structure consisting of a movable plate, a rack plate, gears, a bidirectional threaded rod, a moving plate, and side support plates. When the lifting platform rises, causing the first side ladder to move the U-shaped plate and the movable plate backward, the rack plate drives the gears and bidirectional threaded rod to rotate. This causes the moving plates and side support plates on both sides to move in opposite directions, automatically expanding the contact area between the equipment and the ground. Consequently, the support area increases synchronously with the increase in lifting height, significantly improving the device's anti-overturning stability and preventing tipping accidents caused by increased top weight or personnel movement.

[0017] 3. This invention utilizes a combination of structures including a moving block, slide rail, spring-loaded safety belt, double cams, and locking rods. When a worker walks on an inclined ladder, the buckle blocks are fastened to both sides of the safety suit. In the event of a slip or tilt, the spring-loaded safety belt, through a torsion spring rod and connecting roller plate, drives the sixth rotating rod to rotate. This causes the double cams to push the upper and lower wheel plates and the locking rod to move in opposite directions, allowing the locking rod to insert into the locking groove. This locks the lateral movement of the moving block and the spring-loaded safety belt. Then, the spring-loaded safety belt applies a pulling force to the worker through the buckle blocks, stabilizing their body and effectively preventing collision injuries to the worker against the ladder surface.

[0018] 4. The present invention, through the cooperation of the third rotating rod and the auxiliary transfer wheel, can assist the U-shaped plate to move smoothly backward, and can also limit the maximum backward movement of the U-shaped plate, thereby preventing the tilt angle of the first side ladder from exceeding 55 degrees, and further ensuring the safety of the boarding passage. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the assembled lifting component of the present invention; Figure 3 This is a side sectional view of the support component of the present invention; Figure 4 for Figure 3 Enlarged view of point A; Figure 5 This is a schematic diagram of the front section structure of the support component of the present invention; Figure 6 This is a top-section schematic diagram of the support component of the present invention; Figure 7 This is a top-section structural diagram of the stage assembly of the present invention; Figure 8 This is a schematic diagram of the boarding component structure of the present invention; Figure 9 This is a side sectional view of the boarding assembly of the present invention; Figure 10 This is a schematic diagram of the cross-sectional structure of the ship-connecting assembly of the present invention; Figure 11This is a schematic diagram of the protective component structure of the present invention; Figure 12 This is a schematic diagram of the side cross-section of the movable block of the present invention; Figure 13 for Figure 12 Enlarged view of point B; Figure 14 This is a rear cross-sectional view of the protective component of the present invention; Figure 15 for Figure 14 Enlarged view of point C; Figure 16 This is a side sectional view of the protective component of the present invention; Figure 17 for Figure 16 Enlarged view of point D; Reference numerals: 1. Base; 2. Moving cavity; 3. Movable cavity; 4. Sliding groove; 5. First limiting rod; 6. Ladder plate; 7. Movable plate; 8. U-shaped plate; 9. First rotating rod; 10. First side guard ladder; 11. Support column; 12. Second limiting rod; 13. Lifting block; 14. Lifting platform; 15. Guardrail; 16. Second rotating rod; 17. Support frame; 18. Drive motor; 19. Control roller; 20. Lifting rope; 21. Boss; 22. First telescopic controller; 23. Ladder placement groove; 24. First fixed rod; 25. Inclined ladder; 26. Second telescopic controller; 27. Second fixed rod; 28. Second side guard ladder; 29. ​​Passive component; 30. Bidirectional threaded rod; 31. Gear; 32. Moving plate; 33. Horizontal plate; 34. Side support plate; 35. Third limiting rod; 36. Rack plate; 37. Auxiliary transfer groove; 38. Third rotating rod; 39. Auxiliary transfer wheel; 40. T-shaped plate; 41. Fourth rotating rod; 42. Groove plate; 43. Fifth rotating rod; 44. Movable block; 45. Electric suction cup; 46. Guard frame; 47. Fixed plate; 48. Cavity; 49. Slide rail; 50. Limiting plate; 51. Moving block; 52. Limiting groove; 53. Slot; 54. Protective plate; 55. Sixth rotating rod; 56. Connecting roller plate; 57. Torsion spring rod; 58. Connecting barrel; 59. Spring guard belt; 60. Buckle block; 61. Double cam; 62. Spring; 63. Wheel plate; 64. Locking rod; 65. Cavity groove; 66. Locking groove. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1: Please see Figures 1-11 This invention provides a technical solution: a safety transition ladder device for boarding large floating repair vessels at a dock, comprising: a support assembly, the support assembly including a base 1, the base 1 having a movable cavity 2 and a movable cavity 3 inside, the movable cavity 2 having a third limiting rod 35 at its front and rear ends, the movable cavity 3 having a sliding groove 4 at its rear end, the movable cavity 3 having two first limiting rods 5 at its upper and lower parts respectively, and a ladder plate 6 at the front end of the base 1; a lifting assembly, the lifting assembly including a support column 11 connected to the top of the base 1, the support column 11 having two second limiting rods 12 at its front and rear ends respectively, lifting blocks 13 slidably arranged on the outer surfaces of the four second limiting rods 12, lifting platforms 14 on both sides of the lifting blocks 13, a guardrail 15 at the top of the lifting platforms 14, a second rotating rod 16 rotatably arranged inside the front end of the lifting platform 14, a support frame 17 at the top of the support column 11, a drive motor 18 at the front end of the support frame 17, a control roller 19 on the outer surface of the output shaft of the drive motor 18, and a lifting rope 20 connected to the top of the lifting blocks 13 on the outer surface of the control roller 19; the drive... The operation of the motor 18 allows the control roller 19 to rotate, which in turn allows the lifting rope 20 to drive the lifting block 13 to move the lifting platform 14 upward, thereby changing the height of the lifting platform 14. The platform assembly includes a movable plate 7 slidably connected to four first limiting rods 5. The rear end of the movable plate 7 is provided with a rack plate 36, and the front end of the movable plate 7 is provided with a U-shaped plate 8. The front end of the U-shaped plate 8 is rotatably provided with a first rotating rod 9. The outer surface of the first rotating rod 9 is provided with a first side ladder 10 connected to the outer surface of the second rotating rod 16. The first side ladder 10 connected to the outer surface of the second rotating rod 16 causes the top of the first side ladder 10 to move upward during the upward movement of the lifting platform 14, which in turn causes the bottom of the first side ladder 10 to exert a backward force on the U-shaped plate 8, thereby causing the movable plate 7 to move backward inside the movable cavity 3. This configuration allows workers to move to the top of the lifting platform 14 via the first side ladder 10, regardless of the height to which the lifting platform 14 is moved.

[0022] The boarding assembly includes a boss 21 connected to the rear end of the lifting platform 14. First telescopic controllers 22 are respectively provided on both sides of the boss 21. A ladder slot 23 is provided on the top of the boss 21. A first fixing rod 24 is provided inside the ladder slot 23. An inclined ladder 25, connected to the output ends of the two first telescopic controllers 22, is rotatably mounted on the outer surface of the first fixing rod 24. Four protective components are provided on the top of the inclined ladder 25. A second telescopic controller 26 is provided at the bottom of the inclined ladder 25. A second fixing rod 27 is provided inside the inclined ladder 25. A second side ladder 28 is rotatably mounted on the outer surface of the second fixing rod 27. A passive component 29 connected to the second telescopic controller 26 is provided at the bottom of the second side ladder 28. A ship-connecting assembly is rotatably mounted inside the second side ladder 28.

[0023] The boss 21 connected to the rear end of the lifting platform 14 causes the boss 21 to move upward along with the lifting platform 14 when the platform moves upward. This increases the initial height of the inclined ladder 25, protective components, second side ladder 28, and ship-connecting components at the boss 21, allowing them to contact larger vessels with greater height. The first telescopic controller 22 allows the inclined ladder 25 to rotate at the first fixed rod 24, thereby changing the horizontal angle of the inclined ladder 25. The second telescopic controller 26 allows the second side ladder 28 to rotate at the second fixed rod 27, ensuring that the second side ladder 28 remains horizontally level regardless of the horizontal angle of the inclined ladder 25.

[0024] It should be noted that, according to Figure 9 It can be seen that the slot 23 of the boss 21, which is located near the top of the first fixed rod 24, has an arc, and the arc is fifty-five degrees. This makes the maximum rotation arc of the inclined ladder 25 between zero and fifty-five degrees, thereby ensuring that the inclined ladder 25 meets the safe boarding angle.

[0025] The movable cavity 2 is rotatably provided with a bidirectional threaded rod 30. A gear 31 is provided at the center of the outer surface of the bidirectional threaded rod 30. The top of the rack plate 36 meshes with the outer surface of the gear 31. Movable plates 32 are threadedly connected to both sides of the outer surface of the bidirectional threaded rod 30. The movable plates 32 are slidably sleeved on the third limiting rod 35. A horizontal plate 33 is provided at the top of the movable plate 32. A side support plate 34 is provided on the side of the horizontal plate 33 away from the gear 31. A T-shaped plate 40 is provided at the bottom of the sliding groove 4. The top of the T-shaped plate 40 is slidably connected to the bottom of the rack plate 36.

[0026] During the backward movement of the movable plate 7 with the rack plate 36, the rack plate 36 applies a rotational force to the gear 31, which in turn drives the bidirectional threaded rod 30 to rotate. The rotation of the bidirectional threaded rod 30 causes the movable plate 32 to move in opposite directions with the horizontal plate 33 and the side support plate 34, thereby increasing the contact area between the equipment and the ground and preventing the equipment from tipping over.

[0027] It should be noted that threaded grooves are opened on both sides of the outer surface of the bidirectional threaded rod 30, but the two threaded grooves are in opposite directions. Therefore, the rotation of the bidirectional threaded rod 30 will cause the moving plate 32 to move towards and away from each other. The moving plate 32 sleeved on the third limiting rod 35 will limit the moving plate 32. The T-shaped plate 40 can limit the rack plate 36.

[0028] The top of the U-shaped plate 8 is provided with a moving groove 37, and a third rotating rod 38 is rotatably arranged inside the moving groove 37. The outer surface of the third rotating rod 38 is provided with a moving wheel 39, and the bottom of the moving wheel 39 is in contact with the top of the ladder plate 6.

[0029] The auxiliary transfer wheel 39 can not only assist the U-shaped plate 8 to move backward, but also limit the maximum backward movement of the U-shaped plate 8, thereby preventing the first side guard ladder 10 from tilting at an angle greater than 55 degrees.

[0030] The boat-connecting assembly includes a fourth rotating rod 41, a groove plate 42 on the outer surface of the fourth rotating rod 41, a fifth rotating rod 43 rotatably mounted on the three slots at the bottom of the groove plate 42, a movable block 44 on the outer surface of the fifth rotating rod 43, and an electric suction plate 45 at the bottom of the movable block 44.

[0031] The fourth rotating rod 41 allows the slot plate 42 to rotate, ensuring that all three electric suction cups 45 face the ship. The three fifth rotating rods 43 allow the individual movable block 44 to fine-tune the individual electric suction cup 45, ensuring that each electric suction cup 45 makes repeated contact with the ship. The operation of the electric suction cups 45 also allows the electric suction cups 45 to connect with the ship at the contact point.

[0032] Specifically: During the process of connecting the equipment to the ship, the staff needs to first determine the ship's depth; When the ship's depth is low, the first telescopic controller 22 can be operated directly, causing the inclined ladder 25 to rotate at the first fixed rod 24. When the horizontal height of the top of the inclined ladder 25 is greater than the horizontal height of the ship's deck, the second telescopic controller 26 is operated, and the second side ladder 28 is driven to rotate at the second fixed rod 27 through the passive component 29. The second side ladder 28 is then positioned horizontally directly above the ship's deck. The ship's personnel can then apply rotational force to the fifth rotating rod 43, causing the fifth rotating rod 43 to rotate with the slot plate 42, thereby aligning the working surfaces of the three electric suction cups 45 with the ship's deck. Then, according to the ship's deck conditions, rotational force is applied to each movable block 44, allowing each electric suction cup 45 to contact the connecting structure on the ship's deck. Finally, the electric suction cups 45 are operated, connecting them to the connecting structure on the ship's deck. When the ship's depth is high, the motor 18 needs to be driven first, which in turn rotates the control roller 19. This allows the lifting rope 20 to drive the lifting platform 14 connected to the lifting block 13 to move upward, thereby changing the height of the boss 21. During this process, the upward movement of the lifting platform 14 causes the second rotating rod 16 to exert an upward force on the top of the first side ladder 10, which in turn causes the bottom of the first side ladder 10 to exert a backward force on the first rotating rod 9 connected to the U-shaped plate 8. This causes the U-shaped plate 8 to drive the movable plate 7 and the rack plate 36 to move backward. The backward movement of the rack plate 36 causes the rack plate 36 to exert a rotational force on the gear 31, which in turn causes the gear 31 to rotate. 1. Drive the bidirectional threaded rod 30 to rotate, which allows the two moving plates 32 to move in opposite directions along with the horizontal plate 33 and the side support plate 34. This increases the overall contact range between the equipment and the ground through the side support plate 34, thereby preventing the equipment from tipping over due to the increased weight on top. The auxiliary transfer wheel 39, which contacts the top of the ladder plate 6 and can be selected, can assist the U-shaped plate 8 in moving backward. When the lifting platform 14 moves to a certain height, the operator can operate the first telescopic dispatcher 22, the second telescopic dispatcher 26, and the electric suction plate 45 in sequence according to the operating procedure when the depth is low. This allows the electric suction plate 45 to connect with the connection structure on the deck of the ship with a higher depth.

[0033] Example 2: Please see Figures 12-17 The present invention provides a technical solution: the protective component includes a protective frame 46, a fixed plate 47 on the top of the protective frame 46, an orifice 48 inside the fixed plate 47, a slide rail 49 at the top center of the orifice 48, limiting plates 50 at the front and rear ends of the slide rail 49, an orifice groove 65 on the side wall of the orifice 48, locking grooves 66 at the top and bottom of the lower part of the orifice groove 65, a movable block 51 slidably disposed inside the orifice 48, a limiting groove 52 at the center of the outer surface of the movable block 51, and locking slots 53 on both sides of the top of the limiting groove 52. The limiting groove 52 slidably engages with the outer surface of the limiting plate 50, and the locking slots 53 slidably engage with the outer surface of the slide rail 49. The limiting groove 52, which slidably engages with the outer surface of the limiting plate 50, allows the limiting plate 50 to limit the movable block 51, while the locking slots 53, which slidably engage with the outer surface of the slide rail 49, allow the movable block 51 to move after moving to the slide rail 49.

[0034] The side wall of the movable block 51 is provided with a protective plate 54. A sixth rotating rod 55 is rotatably installed inside the protective plate 54. A connecting roller plate 56 is provided at the end of the sixth rotating rod 55 away from the movable block 51. A torsion spring rod 57 is rotatably installed on the inner wall of the connecting roller plate 56. A connecting barrel 58 is provided on the outer surface of the torsion spring rod 57. A spring-loaded protective belt 59 is provided on the outer surface of the connecting barrel 58. A buckle block 60 is provided at the end of the spring-loaded protective belt 59 away from the movable block 51. A double cam 61 is provided on the outer surface of the sixth rotating rod 55. Springs 62 are provided in the upper and lower parts of the inner cavity of the protective plate 54. A wheel plate 63 is provided on the side of the spring 62 near the double cam 61. A locking rod 64 is provided on the side of the wheel plate 63 away from the double cam 61. The locking rod 64 can be inserted into the locking groove 66. The torsion spring rod 57, the connecting barrel 58 and the spring-loaded protective belt 59 allow the workers walking on the inclined ladder 25 to fasten the buckle block 60 to their safety clothing.

[0035] The rotation of the sixth rotating rod 55 causes the double cam 61 to rotate, which in turn causes the double cam 61 to apply a moving force to the upper and lower wheel plates 63 simultaneously. This causes the two wheel plates 63 to move in opposite directions with the locking rod 64, which in turn causes the locking rod 64 to enter the locking groove 66. The locking rod 64 can then be used to fix the position of the moving block 51 and the double cam 61.

[0036] It should be noted that two opposing protective components form a group. Since there are four protective components, two groups of protective components are installed at the top of the inclined ladder 25.

[0037] Specifically: After the equipment is connected to the ship, the worker can first move to the bottom of the first side ladder 10 via the ladder plate 6, then move to the lifting platform 14 via the first side ladder 10, and then move to the bottom of the inclined ladder 25. The worker can then apply a pulling force to the two buckle blocks 60 of a set of protective components, which will move the two buckle blocks 60 to their sides, and then buckle the two buckle blocks 60 on both sides of the safety suit. The worker then moves on the inclined ladder 25 with the buckle blocks 60. When the worker slips, it will cause the worker to tilt, which will cause the buckle blocks 60 to apply a rotational force to the connecting roller plate 56 through the spring belt 59, the connecting barrel 58 and the torsion spring rod 57. This will cause the connecting roller plate 56 to apply a rotational force to the sixth rotating rod 55, which will cause the sixth rotating rod 55 to rotate with the double cam 61. The rotation of the double cam 61 will apply a pushing force to the wheel plates 63 at its upper and lower positions, which will then... The wheel plate 63 moves backward with the locking rod 64, allowing the locking rod 64 to insert into the locking groove 66. The locking rod 64 is then restrained by the side of the locking groove 66, thus fixing the moving block 51 and the double cam 61. This fixation prevents the spring guard belt 59 from moving laterally, allowing it to exert a pulling force on the worker through the buckle block 60. This stabilizes the worker and prevents their legs and body from colliding with the top of the inclined ladder 25. Once the worker reaches the top of the inclined ladder 25, they can remove the two buckle blocks 60 and push the moving block 51 to the slide rail 49. The slide rail 49 then moves back to the bottom of the inclined ladder 25 with the moving block 51, making it available for subsequent workers. Finally, the worker can smoothly move to the ship via the second side guard ladder 28 in a horizontal position.

[0038] It should be noted that during the above process, the running direction of the slide rail 49 included in the other set of protective components is opposite to that of the slide rail 49 included in the first set of protective components. Therefore, when the staff moves from the ship back to the dock, the staff needs to move from the other set of protective components and then carry out protective work through the two latch blocks 60 of the other set of protective components.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A large floating repair ship quay embarkation safety transition ladder device, characterized by: include: The support assembly includes a base (1), the base (1) has a movable cavity (2) and a movable cavity (3) inside, the movable cavity (3) has a sliding groove (4) at the rear end, the upper and lower parts of the movable cavity (3) are respectively provided with two first limiting rods (5), and the front end of the base (1) is provided with a ladder plate (6). The lifting assembly includes a support column (11) connected to the top of the base (1). The front and rear ends of the inner cavity of the support column (11) are respectively provided with two second limiting rods (12). Lifting blocks (13) are slidably arranged on the outer surfaces of the four second limiting rods (12). Lifting platforms (14) are provided on both sides of the lifting blocks (13). A guardrail (15) is provided on the top of the lifting platform (14). A second rotating rod (16) is rotatably arranged inside the front end of the lifting platform (14). A support frame (17) is provided on the top of the support column (11). A drive motor (18) is provided at the front end of the support frame (17). A control roller (19) is provided on the outer surface of the output shaft of the drive motor (18). A lifting rope (20) connected to the top of the lifting block (13) is provided on the outer surface of the control roller (19). The platform assembly includes a movable plate (7) slidably connected to four first limiting rods (5), a U-shaped plate (8) at the front end of the movable plate (7), a first rotating rod (9) rotatably disposed inside the front end of the U-shaped plate (8), and a first side ladder (10) connected to the outer surface of the first rotating rod (9) and the outer surface of the first rotating rod (9) is provided with a second rotating rod (16). The boarding assembly includes a boss (21) connected to the rear end of a lifting platform (14). A first telescopic dispatcher (22) is provided on both sides of the boss (21). A ladder slot (23) is provided on the top of the boss (21). A first fixing rod (24) is provided inside the ladder slot (23). An inclined ladder (25) is rotatably provided on the outer surface of the first fixing rod (24) and connected to the output ends of the two first telescopic dispatchers (22). Four protective components are provided on the top of the inclined ladder (25). A second telescopic dispatcher (26) is provided at the bottom of the inclined ladder (25). A second fixing rod (27) is provided inside the inclined ladder (25). A second side ladder (28) is rotatably provided on the outer surface of the second fixing rod (27). A passive component (29) connected to the second telescopic dispatcher (26) is provided at the bottom of the second side ladder (28). A ship-connecting assembly is rotatably provided inside the second side ladder (28).

2. A large floating repair ship quay embarkation safety transition ladder arrangement according to claim 1, characterized in that: The movable cavity (2) is rotatably provided with a bidirectional threaded rod (30) inside. A gear (31) is provided at the center of the outer surface of the bidirectional threaded rod (30). Movable plates (32) are threadedly connected to both sides of the outer surface of the bidirectional threaded rod (30). A horizontal plate (33) is provided at the top of the movable plate (32). A side support plate (34) is provided on the side of the horizontal plate (33) away from the gear (31).

3. A safety transfer ladder device for boarding a large floating repair vessel at a dock according to claim 2, characterized in that: The moving cavity (2) has a third limiting rod (35) at its front and rear ends, and the moving plate (32) is slidably sleeved on the third limiting rod (35).

4. A safety transfer ladder device for boarding a large floating repair vessel at a dock according to claim 3, characterized in that: The movable plate (7) has a rack plate (36) at its rear end, and the top of the rack plate (36) meshes with the outer surface of the gear (31).

5. A safety transfer ladder device for boarding a large floating repair vessel at a dock according to claim 4, characterized in that: The top of the U-shaped plate (8) is provided with a moving groove (37), and a third rotating rod (38) is rotatably provided inside the moving groove (37). The outer surface of the third rotating rod (38) is provided with a moving wheel (39), and the bottom of the moving wheel (39) is in contact with the top of the ladder plate (6).

6. A safety transfer ladder device for boarding a large floating repair vessel at a dock according to claim 5, characterized in that: The bottom of the sliding groove (4) is provided with a T-shaped plate (40), and the top of the T-shaped plate (40) is slidably connected to the bottom of the rack plate (36).

7. A safety transfer ladder device for boarding a large floating repair vessel at a dock according to claim 6, characterized in that: The boat-connecting assembly includes a fourth rotating rod (41), the outer surface of which is provided with a groove plate (42), and the bottom of the groove plate (42) is provided with three slots respectively for a fifth rotating rod (43). The outer surface of the fifth rotating rod (43) is provided with a movable block (44), and the bottom of the movable block (44) is provided with an electric suction plate (45).

8. A safety transfer ladder device for boarding a large floating repair vessel at a dock according to claim 7, characterized in that: The protective assembly includes a protective frame (46), a fixing plate (47) on the top of the protective frame (46), an orifice (48) inside the fixing plate (47), a slide rail (49) at the top center of the orifice (48), limiting plates (50) at the front and rear ends of the slide rail (49), an orifice groove (65) on the side wall of the orifice (48), and locking grooves (66) at the top and bottom of the lower part of the orifice groove (65).

9. A safety transfer ladder device for boarding a large floating repair vessel at a dock according to claim 8, characterized in that: The cavity (48) is slidably provided with a moving block (51). A limiting groove (52) is provided at the center of the outer surface of the moving block (51). A slot (53) is provided on both sides of the top of the limiting groove (52). The limiting groove (52) is slidably engaged with the outer surface of the limiting plate (50). The slot (53) is slidably engaged with the outer surface of the slide rail (49).

10. A safety transfer ladder device for boarding a large floating repair vessel at a dock according to claim 9, characterized in that: The side wall of the movable block (51) is provided with a protective plate (54). A sixth rotating rod (55) is rotatably arranged inside the protective plate (54). A connecting roller plate (56) is provided at the end of the sixth rotating rod (55) away from the movable block (51). A torsion spring rod (57) is rotatably arranged on the inner wall of the connecting roller plate (56). A connecting barrel (58) is provided on the outer surface of the torsion spring rod (57). A spring guard (59) is provided on the outer surface of the connecting barrel (58). A buckle block (60) is provided at the end of the spring guard (59) away from the movable block (51). A double cam (61) is provided on the outer surface of the sixth rotating rod (55). Springs (62) are provided in the upper and lower parts of the inner cavity of the protective plate (54). A wheel plate (63) is provided on the side of the spring (62) near the double cam (61). A locking rod (64) is provided on the side of the wheel plate (63) away from the double cam (61). The locking rod (64) can be inserted into the locking groove (66).

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