Suspension type boarding ladder

Abstract

The utility model relates to a suspension type boarding ladder, and belongs to the technical field of marine machinery. The suspension type boarding ladder comprises a supporting platform fixedly arranged on a main deck, and the supporting platform is provided with an extension section extending out of the main deck; the boarding ladder main body comprises a plurality of frame units which are sequentially stacked and fixed, and the top frame unit is connected with the extension section through a hinge mechanism; the boarding platform comprises a first inclined ladder, a spherical hinge turntable and a boarding deck, one end of the first inclined ladder is connected with the free end of the spherical hinge turntable, the other end of the first inclined ladder is grounded, and the boarding deck is connected with the fixed end of the spherical hinge turntable and the bottom frame unit. According to the scheme, through the synergistic effect of the modular frame units and the spherical hinge rotating disc, rapid disassembly and assembly and ship dynamic displacement self-adaptive adjustment can be achieved, and the influence of tide fluctuation and ship jolting on boarding operation is effectively overcome.

Description

Technical Field

[0001] This application relates to the field of marine machinery technology, and in particular to a suspended boarding ladder. Background Technology

[0002] In existing technologies, boarding ladders mostly adopt rigid connections or fixed frames. During shipbuilding and dock operations, the adaptability and safety of such boarding facilities face severe challenges. Taking deep-sea aquaculture vessels as an example, when the vessels are temporarily moored in near-shore river areas, the daily tidal range reaches 2.5 meters, and the mooring space is narrow. Traditional fixed boarding ladders are difficult to adapt to the frequent ship rolling and vertical height changes. Utility Model Content

[0003] To overcome the problems existing in related technologies, this application provides a suspended boarding ladder that can achieve rapid assembly and disassembly and adaptive adjustment of ship dynamic displacement through the synergistic effect of modular frame units and ball joint turntable, effectively overcoming the impact of tidal rise and fall and ship turbulence on boarding operations.

[0004] This application provides a suspended boarding ladder, comprising:

[0005] A support platform, fixed to the main deck, the support platform having an extension section extending out of the main deck;

[0006] The main body of the boarding ladder includes several frame units that are stacked and fixed in sequence, and the top frame unit is connected to the outer extension through a hinge mechanism;

[0007] The boarding platform includes a first inclined ladder, a ball joint turntable, and a boarding deck. One end of the first inclined ladder is connected to the free end of the ball joint turntable, and the other end is grounded. The boarding deck is connected to the fixed end of the ball joint turntable and the bottom frame unit.

[0008] In some embodiments, the first inclined ladder includes:

[0009] Two symmetrically arranged support frames are provided, with several stepped plates evenly distributed between the support frames. A first rotating shaft is provided at the center of both ends of each stepped plate, and the first rotating shaft is rotatably connected to the support frame through a first bearing seat.

[0010] A drive assembly for driving the step plate to rotate about a first pivot axis so that the foot tread of the step plate is horizontal.

[0011] In some embodiments, the stepped plate is further provided with second rotating shafts at both ends, and the second rotating shafts are located on one side of the first rotating shaft;

[0012] The drive assembly includes a sprocket assembly and a power component. The sprocket assembly is located inside the support frame and includes a driving sprocket, a driven sprocket, and a closed-loop chain. The closed-loop chain is provided with a plurality of second bearing seats at equal intervals. The second rotating shaft is rotatably connected to the closed-loop chain through the second bearing seats. The power component is drivenly connected to the driving sprocket. The driving sprocket and the driven sprocket are drivenly connected through the closed-loop chain.

[0013] In some embodiments, the power component is a turntable, the rotation shaft of which passes through the support frame and is fixed coaxially with the drive sprocket, and the rotation shaft of the turntable is provided with a limiting mechanism to restrict its rotation.

[0014] In some embodiments, the limiting mechanism includes a ratchet disc, a fixed shaft, a pawl, and a torsion spring. The ratchet disc is coaxially fixed on the rotating shaft of the turntable. The fixed shaft is perpendicularly disposed on the outside of the support frame. The pawl and the torsion spring are sleeved on the fixed shaft, with one end of the torsion spring connected to the support frame and the other end connected to the pawl. The end of the pawl engages with the tooth groove of the ratchet disc.

[0015] In some embodiments, the step plate is provided with an anti-slip pad, the bottom of the support frame is provided with casters, and the support frame is provided with a first guardrail.

[0016] In some embodiments, the first inclined ladder is provided with a protective door, which is located on the top of the support frame. One side of the protective door is rotatably connected to the first guardrail by a hinge, and the other side is fixed to the first guardrail by a magnetic lock.

[0017] In some embodiments, the support platform is provided with a second guardrail, and the frame unit is provided with a third guardrail.

[0018] In some embodiments, the support platform includes a second inclined ladder, columns, and connecting beams. There are four columns, which are located on the main deck and are symmetrically distributed in pairs. The connecting beams are horizontally located on the top of the columns and have a platform deck on them. The second inclined ladder is inclined between the platform deck and the main deck.

[0019] In some embodiments, the frame unit includes four vertical pipes and horizontal bars located between adjacent vertical pipes and at both ends of the columns. The horizontal bars are connected to the columns via connecting pipes. The upper end of the connecting pipe is sleeved and fixed to the lower end of the column of one of the two adjacent frame units. A locking seat is provided on the outer periphery of the connecting pipe, and the locking seat has mounting holes. The two adjacent frame units are fixedly connected vertically via the locking seat.

[0020] The crossbar is equipped with a walking platform, and adjacent walking platforms are connected by a third inclined ladder.

[0021] The technical solution provided in this application may include the following beneficial effects:

[0022] The suspended boarding ladder provided by this utility model has a hinged connection between the outer end of the support platform and the frame unit, which can disperse the load impact when the ship is turbulent. It can effectively absorb the longitudinal, lateral and vertical displacement of the ship, avoid stress concentration caused by rigid connection, and significantly improve the structural stability. At the same time, the first inclined ladder is connected to the frame unit through a ball joint turntable. When the tide changes or the ship is turbulent, the first inclined ladder can move freely to ensure that it is always connected to the ground, which facilitates the boarding of personnel. Attached Figure Description

[0023] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0024] Figure 1 This is a schematic diagram of the structure of the suspended boarding ladder shown in the embodiments of this application;

[0025] Figure 2 This is a schematic diagram of the assembly of the boarding ladder body and the boarding platform shown in the embodiments of this application;

[0026] Figure 3 This is a schematic diagram of the boarding platform shown in the embodiments of this application;

[0027] Figure 4 This is another structural schematic diagram of the boarding platform shown in the embodiments of this application;

[0028] Figure 5 This is another structural schematic diagram of the boarding platform shown in the embodiments of this application;

[0029] Figure 6 This is a schematic diagram of the structure of the frame unit shown in the embodiment of this application.

[0030] Figure label:

[0031] 1. Supporting platform; 10. Extension section; 11. Second inclined ladder; 12. Column; 13. Connecting beam;

[0032] 2. Boarding ladder main body; 20. Frame unit; 21. Hinge mechanism; 22. Riser; 23. Horizontal bar;

[0033] 3. Boarding platform; 30. First inclined ladder; 300. Support frame; 301. Step plate; 302. First rotating shaft; 303. Second rotating shaft; 304. Drive sprocket; 305. Closed-loop chain; 306. Turntable; 307. Ratchet; 308. Fixed shaft; 309. Pawl; 310. Torsion spring; 311. First guardrail;

[0034] 31. Ball joint turntable; 32. Boarding deck. Detailed Implementation

[0035] Preferred embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0036] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0037] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0038] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0039] like Figures 1-6 As shown, this utility model provides a suspended boarding ladder, including a support platform 1, a boarding ladder body 2, and a boarding platform 3.

[0040] The support platform 1 includes four columns 12, which are symmetrically arranged on the main deck of the ship, with each pair of columns maintaining a symmetrical distribution. The spacing between the columns 12 can be adjusted according to the ship's size and load requirements. Mounting columns are provided on the main deck of the ship, with pre-embedded bolts at the bottom of the mounting columns. The mounting columns are fixed to the main deck by the pre-embedded bolts, and the columns 12 are fixed to the mounting columns by a pin-shaft engagement with a tapered sleeve.

[0041] Two parallel connecting beams 13 are horizontally mounted on the top of the column 12, with a width that can be set to 2 to 2.5 meters. The connecting beams 13 are bolted to the column 12, with one end extending outward beyond the main deck to form an extension section 10 for connecting the main body 2 of the boarding ladder. A platform deck for personnel to walk on is laid on the connecting beams 13, and the platform deck is bolted to the connecting beams 13. The platform deck can be made of checkered steel plate.

[0042] To enhance the structural strength of the platform deck, the supporting platform 1 may also include several crossbeams disposed between the two connecting beams 13. Specifically, the connecting beams 13 are provided with dovetail grooves, and the crossbeams are installed on the dovetail grooves of the two connecting beams 13. A second guardrail is installed on the platform deck, passing through the platform deck and threadedly connected to the mounting lugs on the outside of the connecting beams 13.

[0043] The outer extension 10 of the support platform 1 extends outward by 1.5 to 2 meters from the connecting beam 13. This extension is reinforced by diagonal bracing and is bolted to mounting lugs. The second inclined ladder 11 includes an inclined ladder support and a stepped ladder, with the stepped ladder mounted on the inclined ladder support. The bottom of the inclined ladder support is equipped with casters to facilitate the assembly of the support platform 1 on the main deck of the ship and to move the inclined ladder support to connect the stepped ladder to the platform deck.

[0044] The main body 2 of the boarding ladder is assembled from multiple frame units 20, the number of which can be set according to the height of the ship. Each frame unit 20 consists of four vertical pipes 22 and horizontal bars 23. The vertical pipes 22 and horizontal bars 23 are connected by connecting pipes and fixed with bolts. The lower end of the vertical pipe 22 of the upper frame unit 20 is inserted into the lower connecting pipe and fixed with pins inserted into the mounting holes of the lock seat. The horizontal bars 23 of the top frame unit 20 are also bolted to install lifting lugs, and the lifting lugs on the connecting beam 13 are connected to the lifting lugs on the horizontal bars 23 by shackles.

[0045] Anti-slip steel plates are laid on the crossbars 23 of the frame unit 20 to serve as a walking platform. The walking platform has passage openings, and adjacent walking platforms are connected by a third inclined ladder. The fixed end of the ball-joint turntable 31 is bolted to the boarding deck 32, which is made of checkered steel plate. The bottom frame unit 20 is welded to the boarding deck 32, and the free end is connected to the first inclined ladder 30 via a flange. In specific implementation, the first inclined ladder 30 can be a stepped staircase or a ramp staircase. When the length of the first inclined ladder 30 is relatively long, and the inclination angle of the first inclined ladder 30 is less than 30° due to tidal range, a ramp staircase is preferred. When site space is limited, a stepped staircase is preferred to facilitate safe movement of construction personnel.

[0046] When the first inclined ladder 30 is designed as a stepped staircase, it consists of two symmetrically distributed support frames 300 on both sides, with sprocket assemblies mounted inside the support frames 300. A first rotating shaft 302 is located at the center of both ends of the step plate 301, and this shaft is rotatably connected to the support frame 300 via a first bearing seat. A second rotating shaft 303 is located at each end of the step plate 301 away from the first rotating shaft 302, and the second rotating shaft 303 is fixed to a closed loop via a second bearing seat. The drive assembly can be manually rotated or driven by a motor. In a preferred embodiment, the drive assembly is a turntable 306, whose rotating shaft passes through the support frame 300 and is coaxially fixed to the drive sprocket 304. A ratchet disc 307 has mounting holes for the rotating shaft to pass through, and the rotating shaft is welded and fixed after passing through the ratchet disc 307. The fixed shaft 308 is vertically welded to the outside of the support frame 300. A pawl 309 and a torsion spring 310 are sleeved on the fixed shaft 308. The two ends of the torsion spring 310 are connected to the support frame 300 and the pawl 309 respectively, ensuring that the preload of the torsion spring 310 allows the end of the pawl 309 to engage in the tooth groove of the ratchet disc 307, thereby limiting the unidirectional rotation of the turntable 306. When it is necessary to adjust the foot surface of the step plate 301, the operator can manually pull the pawl 309 to disengage it from the ratchet disc 307. Then, another operator can rotate the turntable 306, causing the closed-loop chain 305 to move, thereby adjusting the tilt angle of the step plate 301.

[0047] Furthermore, to enhance the safety of pedestrians, an anti-slip mat is bonded to the surface of the step slab 301. The anti-slip mat is made of rubber and has a diamond-shaped raised texture on its surface.

[0048] Furthermore, to improve the service life of the first inclined ladder 30, casters are installed at the bottom of the support frame 300.

[0049] Furthermore, the top of the first inclined ladder 30 is provided with a protective door, which is hinged to the first guardrail 311 by a hinge and fixed by a magnetic latch when closed.

[0050] In summary, the suspended boarding ladder provided by this utility model can quickly adapt to different ship heights through the modular frame unit 20, achieve dynamic balance through the linkage mechanism of the ball joint turntable 31 and the step plate 301, and facilitate berth adjustment with the support frame 300 omnidirectional wheels, thus meeting the safety operation requirements under tidal conditions and ship rolling conditions.

[0051] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A suspended boarding ladder, characterized in that include: A support platform (1) is fixed on the main deck, and the support platform (1) has an extension (10) extending out of the main deck; The main body of the boarding ladder (2) includes several frame units (20) that are stacked and fixed in sequence, and the top frame unit (20) is connected to the extension section (10) through a hinge mechanism (21); The boarding platform (3) includes a first inclined ladder (30), a ball joint turntable (31) and a boarding deck (32). One end of the first inclined ladder (30) is connected to the free end of the ball joint turntable (31), and the other end is grounded. The boarding deck (32) is connected to the fixed end of the ball joint turntable (31) and the bottom frame unit (20).

2. The suspended access ladder of claim 1, wherein, The first inclined ladder (30) includes: Two symmetrically arranged support frames (300) are provided, and a number of stepped plates (301) are equidistantly distributed between the support frames (300). A first rotating shaft (302) is provided at the center of both ends of each stepped plate (301), and the first rotating shaft (302) is rotatably connected to the support frame (300) through a first bearing seat. A drive assembly for driving the step plate (301) to rotate about a first pivot (302) so that the foot surface of the step plate (301) is horizontal.

3. The suspended access ladder of claim 2, wherein, The step plate (301) is also provided with a second rotating shaft (303) at both ends, and the second rotating shaft (303) is located on one side of the first rotating shaft (302); The drive assembly includes a sprocket assembly and a power component. The sprocket assembly is located inside the support frame (300). The sprocket assembly includes a drive sprocket (304), a driven sprocket, and a closed-loop chain (305). The closed-loop chain (305) is provided with a plurality of second bearing seats at equal intervals. The second rotating shaft (303) is rotatably connected to the closed-loop chain (305) through the second bearing seats. The power component is drivenly connected to the drive sprocket (304). The drive sprocket (304) and the driven sprocket are drivenly connected through the closed-loop chain (305).

4. The suspended access ladder of claim 3, wherein, The power component is a turntable (306). The rotation shaft of the turntable (306) passes through the support frame (300) and is coaxially fixed with the drive sprocket (304). The rotation shaft of the turntable (306) is provided with a limiting mechanism to restrict its rotation.

5. The suspended access ladder of claim 4, wherein, The limiting mechanism includes a ratchet disc (307), a fixed shaft (308), a pawl (309), and a torsion spring (310). The ratchet disc (307) is coaxially fixed on the rotating shaft of the turntable (306). The fixed shaft (308) is vertically disposed on the outside of the support frame (300). The pawl (309) and the torsion spring (310) are sleeved on the fixed shaft (308). One end of the torsion spring (310) is connected to the support frame (300), and the other end is connected to the pawl (309). The end of the pawl (309) engages with the tooth groove of the ratchet disc (307).

6. The suspended access ladder of claim 5, wherein, The step plate (301) is provided with an anti-slip pad, the bottom of the support frame (300) is provided with casters, and the support frame (300) is provided with a first guardrail (311).

7. The suspended access ladder of claim 6, wherein, The first inclined ladder (30) is equipped with a protective door, which is located on the top of the support frame (300). One side of the protective door is rotatably connected to the first guardrail (311) via a hinge, and the other side is fixed to the first guardrail (311) via a magnetic lock.

8. The suspended access ladder of claim 1, wherein, The support platform (1) is provided with a second guardrail, and the frame unit (20) is provided with a third guardrail.

9. The suspended access ladder of claim 1, wherein, The support platform (1) includes a second inclined ladder (11), columns (12) and connecting beams (13). There are four columns (12). The columns (12) are located on the main deck and are symmetrically distributed in pairs. The connecting beams (13) are horizontally located on the top of the columns (12). The platform deck is located on the connecting beams (13). The second inclined ladder (11) is inclined between the platform deck and the main deck.

10. The suspended access ladder of claim 1, wherein, The frame unit (20) includes four vertical pipes (22) and horizontal bars (23) located between adjacent vertical pipes (22) and at both ends of the column (12). The horizontal bars (23) are connected to the column (12) by connecting pipes. The upper end of the connecting pipe is sleeved and fixed to the lower end of the column (12) of one of the two adjacent frame units (20). The connecting pipe is provided with a locking seat on its outer periphery, and the locking seat is provided with mounting holes. The two adjacent frame units (20) are fixedly connected vertically by the locking seat. The crossbar (23) is provided with a walking platform, and the adjacent walking platforms are connected by a third inclined ladder.

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