A retractable ramp mechanism

Abstract

The application relates to the technical field of wharf equipment, in particular to a telescopic boarding plate mechanism which comprises a mounting frame, a driving mechanism, a movable platform, an intermediate cover plate and a movable connecting plate. The mounting frame is mounted on a lifting transfer device, and a cavity for accommodating the movable platform is formed in the mounting frame. The driving mechanism is mounted on the mounting frame and is used for driving the movable platform to move along the width direction of the mounting frame. The intermediate cover plate is movably connected to the mounting frame, the intermediate cover plate can be embedded in the cavity, and the intermediate cover plate is used for filling the gap on the mounting frame after the movable platform is extended. The maximum length of the movable platform driven to move by the driving mechanism is the width of the intermediate cover plate. The movable connecting plate is movably connected to the end of the movable platform away from the mounting frame, and is used for compensating the distance between the movable platform and a ship. The application has the effect of solving the problem that the length of the ship boarding plate cannot be adjusted, so as to meet the requirement of convenient cargo connection.

Description

Technical Field

[0001] This application relates to the field of dock equipment technology, and in particular to a retractable ramp mechanism. Background Technology

[0002] Water transport is a mode of transportation that uses ships to transport passengers and goods. Water transport mainly undertakes large-volume, long-distance transportation. Water transport has relatively low costs and plays a major role in trunk line transportation.

[0003] A wharf is a place on the coast or riverbank specifically for ships to moor. Wharves are primarily used for passenger embarkation and disembarkation, and cargo loading and unloading. Due to the relatively slow speed of water transport, it handles a large volume of cargo. During transshipment, workers need to move cargo from the ship to the hoisting and transfer equipment or transfer cargo from the hoisting and transfer equipment to the ship. To protect ships from collisions with the wharf while berthed, wharf fenders are installed, creating a distance between the ship and the wharf, preventing workers from directly moving between the wharf and the ship.

[0004] To address the aforementioned issues, a gangway is typically installed between the hoisting and transfer device and the vessel. This gangway acts as a bridge between the vessel and the dock, forming a safe passage between the hoisting and transfer device's cabin and the berthed vessel. Once the vessel docks, workers install and secure the appropriate gangway for loading and unloading cargo. After the cargo transport is completed, the gangway is removed. However, due to variations in vessel type, hydrographic conditions, and dock fender length, the distance between the vessel and the dock can be variable. Furthermore, the existing gangways used with hoisting and transfer devices have fixed lengths, requiring replacement with different lengths depending on the specific circumstances. This inconveniences workers when transferring cargo and fails to meet the requirements for convenient use. Summary of the Invention

[0005] To address the issue of the inability to adjust the length of ship gangplanks and to meet the need for convenient cargo handling, this application provides a retractable gangplank mechanism.

[0006] The retractable ramp mechanism provided in this application adopts the following technical solution:

[0007] A retractable platform mechanism includes a mounting frame, a drive mechanism, a movable platform, an intermediate cover plate, and a movable connecting plate;

[0008] The mounting frame is installed on the lifting and transferring device, and the mounting frame has a cavity for accommodating the movable platform.

[0009] The drive mechanism is mounted on the mounting frame and is used to drive the movable platform to move along the width direction of the mounting frame;

[0010] The intermediate cover plate is movably connected to the mounting frame. The intermediate cover plate can be embedded in the cavity to fill the gap in the mounting frame after the movable platform extends. The maximum length by which the driving mechanism moves the movable platform is equal to the width of the intermediate cover plate.

[0011] The movable connecting plate is movably connected to the end of the movable platform away from the mounting frame, and is used to compensate for the distance between the movable platform and the ship.

[0012] By adopting the above technical solution, this device needs to be pre-installed on the lifting and transfer device before use. After the ship docks, the drive mechanism drives the movable platform to extend from the installation frame. The extension distance is the maximum distance that the drive mechanism can move the movable platform. After the movable platform extends, the movable connecting plate is adjusted so that it overlaps with the ship. Finally, the intermediate cover plate is adjusted so that it can fill the gap left on the installation frame after the movable platform extends, thus completing the passage construction. After use, the overlap between the movable connecting plate and the ship is released, the intermediate cover plate is removed from the cavity, and the drive mechanism drives the movable platform to retract. In this way, the movable platform, intermediate cover plate, and movable connecting plate together form a safe passage between the lifting and transfer device and the ship. At the same time, under the premise that the installation frame and the movable platform are stably fixed, the movable connecting plate can compensate for different length requirements between the movable platform and the ship, that is, adapt to different distance requirements between the lifting and transfer device and the ship. This solves the problem of the inability to adjust the length of the ship's gangway and meets the need for convenient cargo transfer.

[0013] Optionally, the movable connecting plate includes multiple small flaps, which are spaced apart along the length of the movable platform.

[0014] By adopting the above technical solution, a corresponding number of small flaps can be used according to the width of the actual overlapping position of the movable connecting plates to meet the overlapping requirements of different lengths.

[0015] Optionally, each of the small flaps is hinged to the movable platform.

[0016] By adopting the above technical solution, the small flap can be simply flipped at a certain angle during use, and then flipped back to its original position after use, making it convenient and quick. This method can also compensate for angles at the joint between the mobile platform and the ship.

[0017] Optionally, the intermediate cover plate includes two intermediate flaps, both of which are hinged to the mounting frame and flip relative to each other. The mounting frame has a placement area for accommodating the intermediate flaps.

[0018] By adopting the above technical solution, when the mobile platform is in the retracted state, the middle flap is located in the placement area, which can play a good role in fixing the middle flap. When the mobile platform is in the extended state, the two middle flaps flip relative to each other in the direction of mutual approach, which can fill the gap left on the installation frame after the mobile platform is extended.

[0019] Optionally, each of the small flip plates is formed with a ramp, the height of which gradually decreases from the end near the movable platform to the end away from the movable platform.

[0020] By adopting the above technical solution, the connection from the movable plate to the ship will be smoother and will not produce abnormal bulges.

[0021] Optionally, each of the small flaps is provided with a rubber buffer overlap pad on the side facing away from the slope.

[0022] By adopting the above technical solution, the rubber buffer overlap pad can increase the friction and improve the firmness of the small flap overlap.

[0023] Optionally, each of the small flaps is formed with drainage holes.

[0024] By adopting the above technical solution, the drainage hole can drain the surface water in a timely manner, improving safety.

[0025] Optionally, the length of the mounting frame extending beyond the dock is less than the length of the dock fender.

[0026] By adopting the above technical solution, it is ensured that the installation of the frame will not affect the ship when it is docked.

[0027] Optionally, it also includes two slide rails, both of which are mounted on the mounting frame, and the movable platform is slidably connected to the mounting frame via the two slide rails.

[0028] By adopting the above technical solutions, both the support and the stability of the sliding process can be improved.

[0029] Optionally, railings are installed on both the mounting frame and the active platform.

[0030] By adopting the above technical solutions, a safety protection function can be achieved, reducing the possibility of accidents.

[0031] In summary, this application includes at least one of the following beneficial technical effects:

[0032] 1. This application includes an installation frame, a drive mechanism, a movable platform, an intermediate cover plate, and a movable connecting plate. The installation frame is mounted on the lifting and transferring device, and the drive mechanism is mounted on the installation frame. The drive mechanism drives the movable platform to move along the width direction of the installation frame. A cavity is provided in the installation frame to accommodate the movable platform. An intermediate cover plate is hinged to the installation frame, and the movable connecting plate is hinged to the end of the movable platform away from the installation frame. When the ship docks, based on the distance between the ship and the lifting and transferring device, the drive mechanism causes the movable platform to extend by a corresponding length. Then, the movable connecting plate is flipped so that it overlaps the ship's deck, achieving length compensation between the movable platform and the ship. Finally, the intermediate cover plate is flipped so that it is embedded in the cavity. In this way, the intermediate cover plate, the movable platform, and the movable connecting plate constitute a passage between the lifting and transferring device and the ship, allowing workers to walk. After the drive mechanism extends the movable platform to a fixed length, the intermediate cover plate is used to fill the gap left on the mounting frame after the movable platform extends. Then, the movable connecting plate is used to compensate for the different distances between the movable platform and the ship. This can meet the needs of different distances between the lifting and transfer device and the ship, and has higher practicality.

[0033] 2. In this application, the movable connecting plate includes multiple lower flaps, and multiple small flaps are evenly distributed along the length of the movable platform. This allows the appropriate number of small flaps to be flipped according to the width of the actual overlap position of the movable connecting plate, thus meeting different overlap requirements. Each small flap is also equipped with a drainage hole to promptly drain surface water; rubber buffer overlap pads are also provided on the small flaps to ensure stability during overlap.

[0034] 3. In this application, the drive mechanism preferably uses a geared motor to drive a trapezoidal threaded screw. This improves the stability of the movable platform when it extends or retracts, and the trapezoidal threaded screw also provides self-locking, ensuring that the platform will not loosen during movement. Additionally, slide rails are provided on both sides of the movable platform, which enhances support and stability during sliding. Attached Figure Description

[0035] Figure 1 This is a structural schematic diagram of the retractable ramp mechanism in this application;

[0036] Figure 2 This is a schematic diagram of the structure of the retractable ramp mechanism in this application after the middle cover plate is hidden;

[0037] Figure 3 This is a top view of the retractable ramp mechanism in this application after one of the intermediate flaps is hidden;

[0038] Figure 4 This is a front view of the small flap in this application;

[0039] Figure 5 This is a bottom view of the small flap in this application;

[0040] Figure 6 This is a front view of the middle flap in this application.

[0041] Explanation of reference numerals in the attached drawings: 1. Mounting frame; 2. Drive mechanism; 21. Gear motor; 22. Trapezoidal threaded screw; 23. Slider; 3. Movable platform; 4. Intermediate cover plate; 41. Intermediate flap; 5. Movable connecting plate; 51. Small flap; 6. Cavity; 7. Slide rail; 8. Ramp; 9. Rubber buffer overlap pad; 10. Drainage hole; 11. Railing; 12. Handle; 13. Support base; 14. Placement area. Detailed Implementation

[0042] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0043] This application discloses a retractable ramp mechanism, referring to... Figure 1 and Figure 2 The retractable platform mechanism includes a mounting frame 1, a drive mechanism 2, a movable platform 3, an intermediate cover plate 4, and a movable connecting plate 5. The mounting frame 1 is mounted on the lifting and transfer device. The mounting frame 1 has a cavity 6 for accommodating the movable platform 3. The drive mechanism 2 is mounted on the mounting frame 1 and is used to drive the movable platform 3 to move along the width direction of the mounting frame 1. The maximum length of movement of the movable platform 3 is the width of the intermediate cover plate 4. The intermediate cover plate 4 is movably connected to the mounting frame 1 and can be embedded in the cavity 6. The movable connecting plate 5 is movably connected to the end of the movable platform 3 away from the mounting frame 1.

[0044] Before use, the mounting frame 1 and the lifting and transferring device are fixed together to form a stable installation foundation, ensuring that the end of the device will not move during use. When the ship docks, the drive mechanism 2 drives the movable platform 3 to extend from the cavity 6 until it reaches its maximum displacement. The movable connecting plate 5 is then adjusted to overlap with the ship. Finally, the intermediate cover plate 4 is placed to fill the gap in the mounting frame 1 after the movable platform 3 extends; this gap is the cavity 6. After use, the overlap between the movable connecting plate 5 and the ship is released, and the intermediate cover plate 4 is removed from the cavity 6. The drive mechanism 2 then drives the movable platform 3 to retract. In this way, the movable platform 3, intermediate cover plate 4, and movable connecting plate 5 together form a safe passage between the lifting and transferring device and the ship. Simultaneously, the movable connecting plate 5 can compensate for different length requirements between the movable platform 3 and the ship, thus solving the problem of the inability to adjust the length of the ship's gangway and meeting the need for convenient cargo handling.

[0045] Specifically, refer to Figure 1 and Figure 2The structure of the mounting frame 1 will not be specifically described in this embodiment; it only needs to meet the corresponding strength requirements. In this embodiment, the preferred material for the mounting frame 1 is channel steel, shaped steel, or square steel pipe. Using these materials reduces material usage and saves costs while meeting strength requirements; it also facilitates the formation of the cavity 6 to accommodate the movable platform 3. The length of the mounting frame 1 extending beyond the dock is less than the length of the dock fender, ensuring that ships will not collide with the device during berthing. Of course, the connection between the mounting frame 1 and the lifting and transferring device can be welding or a detachable connection.

[0046] Reference Figure 2 and Figure 3 The drive mechanism 2 is used to extend or retract the movable platform 3. This allows the platform to extend when a ship is docked, minimizing space occupation when not in use. The drive mechanism 2 also drives the movable platform 3 to move linearly. In this embodiment, the drive mechanism 2 includes a geared motor 21, a trapezoidal threaded screw 22, and a slider 23. The geared motor 21 is mounted on the mounting frame 1 or on the lifting and transferring device. The trapezoidal threaded screw 22 is fixedly connected to the output shaft of the geared motor 21. The slider 23 is connected to the movable platform 3 and is threadedly connected to the trapezoidal threaded screw 22. Thus, the extension or retraction of the movable platform 3 is achieved through the threaded engagement of the slider 23 and the trapezoidal threaded screw 22. Of course, the forward and reverse rotation of the geared motor 21 and the movement distance of the movable platform 3 can be easily controlled by a controller; however, this will not be specifically described in this embodiment.

[0047] Of course, other transmission mechanisms such as linear cylinders and hydraulic cylinders can also be used to meet the requirements. Compared with other transmission mechanisms, the trapezoidal threaded screw 22 has a self-locking function and is safe and reliable.

[0048] Reference Figure 1 and Figure 2 Two slide rails 7 are also installed on the mounting frame 1, and the movable platform 3 is slidably connected to the mounting frame 1 through the two slide rails 7. In this way, during the extension or retraction of the movable platform 3, the slide rails 7 can improve both support and stability during the sliding process. In this embodiment, the slide rails 7 are preferably heavy-duty slide rails, which have low frictional resistance, high load-bearing capacity, smooth and quiet operation, and are corrosion and rust resistant.

[0049] Furthermore, referring to Figure 3 and Figure 4The movable connecting plate 5 includes multiple small flaps 51, which are evenly spaced along the length of the movable platform 3. Due to the different types of vessels, the lengths used to overlap the movable connecting plates 5 vary. By using the small flaps 51, the appropriate number of flaps 51 is determined based on the width of the actual overlap position of the movable connecting plates 5, thus meeting the overlap requirements for different lengths. Of course, there may be special cases where the distance between the lifting and transfer device and the vessel is precisely met by the intermediate cover plate 4 and the movable platform 3; in this case, it is not necessary to flip the individual small flaps 51.

[0050] Each small flap 51 is hinged to the movable platform 3. In use, the small flap 51 can be simply flipped at a certain angle. After use, each small flap 51 is flipped back to a position flush with the movable platform 3 to secure it, making the process convenient and quick. Furthermore, when there is a height difference between the movable platform 3 and the ship's overlapping area, the small flaps 51 can compensate for this difference. In this embodiment, each small flap 51 is connected to the movable platform 3 via hinges; however, other connection methods that meet the requirements can also be used.

[0051] Reference Figure 3 and Figure 4 Each small flap 51 has a ramp 8 formed on it. The height of the ramp 8 gradually decreases from the end closer to the movable platform 3 to the end farther away from the movable platform 3, meaning that the cross-section of the small flap 51 is trapezoidal. The ramp 8 allows for a smooth transition from the small flap 51 to the ship's deck without creating noticeable protrusions, facilitating worker movement. A rubber buffer overlap pad 9 is provided on the side of the small flap 51 facing away from the ramp 8. The rubber buffer overlap pad 9 increases friction, improves the stability of the small flap 51 when overlapping, and enhances safety.

[0052] Reference Figure 5 Each small flap 51 is also provided with multiple drainage holes 10, which can drain the water on the surface in time, prevent the channel surface from being too slippery, and improve safety.

[0053] Reference Figure 1 and Figure 2 Both the mounting frame 1 and the movable platform 3 are equipped with railings 11, which serve as safety protection and reduce the possibility of accidents. Specifically, the railings 11 are installed on the side of the mounting frame 1 closest to the sea, arranged in an L-shape, and on both sides of the movable platform 3.

[0054] Reference Figure 2 and Figure 3The intermediate cover plate 4 includes two intermediate flaps 41, both of which are hinged to the mounting frame 1. The two intermediate flaps 41 rotate relative to each other, and the mounting frame 1 has a placement area 14 formed on it to accommodate the intermediate flaps 41. When the movable platform 3 is in the retracted state, the two intermediate flaps 41 are located in the placement area 14, which can fix the intermediate flaps 41. When the movable platform 3 is in the extended state, the two intermediate flaps 41 rotate relative to each other in a direction that brings them closer together, so that the two intermediate flaps 41 can be spliced ​​together to form a whole, which can fill the gap left on the mounting frame 1 after the movable platform 3 is extended, thereby creating a complete safety passage. At the same time, when the movable platform 3 is retracted, flipping the intermediate flaps 41 can ensure that the railings 11 on the movable platform 3 can pass through smoothly.

[0055] In this embodiment, the middle flap 41 is connected to the mounting frame 1 via a hinge. Of course, the middle flap 41 can also be connected in other ways.

[0056] Of course, refer to Figure 3 and Figure 6 To facilitate the flipping of the intermediate flaps 41, each intermediate flap 41 is equipped with a handle 12, improving ease of operation. Each intermediate flap 41 is also fixed with a support base 13, which provides support when the intermediate flap 41 fills the cavity 6, effectively reducing the thickness of the intermediate flap 41. Specifically, the slider 23 is installed at the end of the movable platform 3 away from the small flap 51 and located on the side of the movable platform 3, with the top surface of the slider 23 lower than the top surface of the movable platform 3. Thus, when the movable platform 3 moves to the preset position, the slider 23 remains within the cavity 6; when the intermediate flap 41 flips into the cavity 6, the slider 23 and the intermediate flap 41 abut against each other, providing support. Of course, to facilitate the flipping of the small flaps 51, handles 12 can also be installed on each small flap 51.

[0057] It should be noted that this device can achieve intelligent linkage control with the lifting and transfer device, that is, the operation of this device can be controlled by the control platform on the lifting and transfer device, which greatly improves its practicality.

[0058] Of course, depending on the actual situation, the distance range between the lifting and transfer device and the ship will be different. The dimensions of the installation frame 1, the movable platform 3 and each small flip plate 51 need to be determined according to the different conditions of each dock.

[0059] The implementation principle of the retractable platform mechanism in this application embodiment is as follows: Before use, this device needs to be integrated with the lifting and transfer device. After the ship docks at the pier, the drive mechanism 2 drives the movable platform 3 to extend from the mounting frame 1. The extension distance is the maximum distance that the drive mechanism 2 can move the movable platform 3. After the movable platform 3 extends, a corresponding number of small flaps 51 are flipped so that the lower flaps overlap the ship. Finally, the middle flap 41 is flipped so that the middle cover plate 4 can fill the gap left on the mounting frame 1 after the movable platform 3 extends. In this way, the passage is completed, and the workers open the automatic door of the lifting and transfer device to load or unload cargo. After loading or unloading is completed, the small flaps 51 are flipped onto the movable platform 3, and the middle flap 41 is flipped to the placement area 14. The drive mechanism 2 drives the movable platform 3 to retract. In this way, the movable platform 3, the intermediate cover plate 4, and the movable connecting plate 5 together form a safe passage between the lifting and transfer device and the ship. At the same time, under the premise that the installation frame 1 and the movable platform 3 are stably fixed, the movable connecting plate 5 can compensate for the different length requirements between the movable platform 3 and the ship, that is, it adapts to the different distance requirements between the lifting and transfer device and the ship. This solves the problem that the length of the ship's gangway cannot be adjusted and meets the need for convenient cargo transfer.

[0060] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A retractable boarding mechanism, characterized by: It comprises a mounting frame (1), a driving mechanism (2), a movable platform (3), an intermediate cover plate (4) and a movable connecting plate (5). The mounting frame (1) is installed on the lifting transfer device, and a cavity (6) for accommodating the movable platform (3) is formed in the mounting frame (1). The driving mechanism (2) is installed on the mounting frame (1) and used to drive the movable platform (3) to move along the width direction of the mounting frame (1). The intermediate cover plate (4) is movably connected to the mounting frame (1) and can be embedded in the cavity (6) to fill the gap on the mounting frame (1) after the movable platform (3) is extended, and the maximum length of the movable platform (3) driven by the driving mechanism (2) to move is the width of the intermediate cover plate (4).

2. The retractable boarding mechanism of claim 1, wherein: The movable connecting plate (5) is movably connected to the end of the movable platform (3) away from the mounting frame (1) and used to compensate the distance between the movable platform (3) and the ship.

3. The retractable boarding mechanism of claim 1, wherein: Each small flap (51) is hinged to the movable platform (3), and a slope (8) is formed on each small flap (51), and the height of the slope (8) gradually decreases from the end close to the movable platform (3) to the end away from the movable platform (3).

4. The retractable boarding mechanism of claim 1, wherein: Each small flap (51) is hinged to the movable platform (3), and a slope (8) is formed on each small flap (51), and the height of the slope (8) gradually decreases from the end close to the movable platform (3) to the end away from the movable platform (3).

5. The retractable boarding mechanism of claim 1, wherein: The length of the mounting frame (1) extending out of the wharf is less than the length of the wharf fender. The mounting frame (1) and the movable platform (3) are both provided with railings (11). The mounting frame (1) and the movable platform (3) are both provided with railings (11).

Images