A marine container twist lock and its lashing components

Abstract

This invention relates to the field of marine container fastening technology, specifically to a marine container twist lock and its lashing components. The twist lock includes a housing with a trigger slot at its front end and a first movable slot inside. A first rotating shaft is rotatably mounted within the first movable slot. An upper locking head is fixedly mounted at the lower end of the first rotating shaft, and a lower locking head is fixedly mounted at the upper end. Protrusions are fixedly mounted at both the upper and lower ends of the twist lock housing. This invention connects four sets of twist lock housings at the four corners of one side where two sets of containers are joined. Pre-drilled holes on the two sets of containers align with the protrusions, upper locking heads, and lower locking heads at the upper and lower ends of the twist lock housing. Turning the first rotating shaft rotates the upper and lower locking heads, connecting the two sets of containers together. Rotating the second rotating shaft rotates a first bevel gear, a second bevel gear, and a double-acting screw, which in turn moves two sets of first sliding sleeves and two sets of connecting rods upwards.

Description

Technical Field

[0001] This invention relates to the field of marine container securing technology, specifically to a marine container twist lock and its lashing components. Background Technology

[0002] Container shipping is the safest mode of modern cargo transport. Containers must be connected and secured to the carrier using specialized locking devices. Currently, containers are stacked during transport, and these stacked containers are secured with locking devices to prevent them from shifting or tipping over during transit. To prevent excessively tall containers from falling due to wind and waves, they need to be lashed. However, with existing torsion locks and lashing devices, the two sets of locking jaws experience friction as the handle rotates, leading to excessive wear. Furthermore, the surface of the locking jaws becomes increasingly smooth with wear, making it easy for the secured container to loosen during transport due to shaking, posing a significant safety hazard. Lacing devices require external tools to tighten, which can also loosen during transport, reducing their securing effect. Therefore, we propose a marine container torsion lock and lashing device to solve these problems. Summary of the Invention

[0003] The purpose of this invention is to provide a marine container twist lock and its lashing components to solve the problem mentioned in the background art where the locking clamp is subjected to a certain frictional force during the gradual clamping process caused by the rotation of the handle, resulting in excessive wear. This can easily lead to the twist lock loosening due to shaking of the fixed container during transportation.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a marine container twist lock, comprising a twist lock housing,

[0005] The front end of the twist lock housing is provided with a trigger groove, and the inside of the twist lock housing is provided with a first movable groove. A first rotating shaft is rotatably installed in the first movable groove. An upper locking head is fixedly installed at the lower end of the first rotating shaft, and a lower locking head is fixedly installed at the upper end of the first rotating shaft. Both the upper and lower ends of the twist lock housing are fixedly installed with protrusions. Limiting components are provided in both sets of the first movable grooves, and a locking component is provided in the first rotating shaft.

[0006] Preferably, the limiting component includes two sets of second sliding sleeves, which are disposed in two sets of first movable grooves. A connecting rod is inserted into each set of second sliding sleeves in an annular manner. A first toothed disc is disposed in each set of first movable grooves. The first toothed discs are fixedly connected to multiple sets of connecting rods. A second toothed disc is fixedly installed in opposite ends of each set of first movable grooves. A spring is disposed between each set of second sliding sleeves and each set of first toothed discs.

[0007] Preferably, the locking assembly includes a second rotating shaft, which is rotatably mounted inside the front end of the first rotating shaft. A first bevel gear is rotatably mounted inside the first rotating shaft and is fixedly connected to the rear end of the second rotating shaft. A second bevel gear is rotatably mounted inside the first rotating shaft. A bidirectional screw is rotatably mounted inside the first rotating shaft. The second bevel gear is fixedly connected to the bidirectional screw. A second movable groove is provided in both the upper and lower ends of the first rotating shaft. A sliding groove is provided in both the upper and lower ends of the first rotating shaft. The two sets of sliding grooves are connected to the two sets of second movable grooves. A first sliding sleeve is threaded onto both the upper and lower ends of the bidirectional screw.

[0008] Preferably, the two sets of first toothed discs and the two sets of second toothed discs are arranged opposite each other, and the teeth on the side of the two sets of first toothed discs and the two sets of second toothed discs are adapted to each other.

[0009] Preferably, a connecting plate is fixedly installed on the front right side of the twist lock housing, and a through hole is provided in the connecting plate.

[0010] Preferably, the ends of the two sets of first sliding sleeves and the two sets of second sliding sleeves are located on the inner walls of the two sets of sliding grooves, and the outer surfaces of the two sets of first sliding sleeves and the inner walls of the two sets of second sliding sleeves are the same as the diameter lines of the outer wall of the first rotating shaft and the inner wall of the second movable groove, respectively.

[0011] Preferably, a marine container lashing device includes a hook on the connecting plate, a fixing member fixedly installed at the right end of the hook, a groove in the fixing member, a rack movably inserted in the rear end of the groove, a metal strip fixedly installed at the right end of the rack, and a hook, a fixing member, and a rack on the right end of the metal strip. A third gear is rotatably installed in each of the two sets of grooves, a handle is fixedly installed on each of the two sets of third gears, and a threaded sleeve is threaded into each of the two sets of grooves, with the threaded sleeves threaded onto the two sets of handles.

[0012] Preferably, the upper and lower openings on the front side of one end of the two sets of third gears within the two sets of grooves are smaller than the upper and lower heights of the two sets of third gears, and the upper and lower openings on the front side of one end of the two sets of third gears within the two sets of grooves are the same size as the diameters of the two sets of handles.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] (1) This invention places four sets of twist lock housings at the four corners of one side where two sets of containers are attached. The pre-drilled holes on the two sets of containers are connected to the protrusions, upper lock head and lower lock head at the upper and lower ends of the twist lock housing. The first rotating shaft is turned to drive the upper lock head and lower lock head to rotate and connect the two sets of containers together. The second rotating shaft is turned to drive the first bevel gear, the second bevel gear and the double screw to rotate. The double screw drives the two sets of first sliding sleeves and the two sets of connecting rods to move upward. The two sets of first sliding sleeves and the two sets of second sliding sleeves squeeze the two sets of springs and the two sets of first gear discs, so that the two sets of first gear discs are tightly attached to the two sets of second gear discs. This completes the locking of the upper lock head and lower lock head after rotation, preventing the first rotating shaft, upper lock head and lower lock head from twisting due to shaking during transportation after the two sets of containers are connected together. It also prevents the limiting components from being loosened by shaking during container transportation, improves the stability and reliability of container docking, and enables continuous stacking of containers. The container stacking connection locking is convenient.

[0015] (2) Connect the hooks and fasteners at both ends of the metal strip to the connecting plate on the twist lock housing, and drive the third gear to rotate by turning the handle inside the fastener. This causes the two sets of third gears to rotate and drive the two sets of racks to slide into the two sets of grooves, thereby tightening and straightening the metal strip. Multiple sets of metal strips cross and fit against the side of the container. After the handle is turned and put into the groove, it is connected to the handle through the screw sleeve. This allows the racks and metal strips to be tightened and straightened and locked, which is convenient for quickly binding the container. The structure is simple and ensures that containers that are stacked too high will not tip over or tilt during transportation. Attached image description:

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a front view schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a frontal, disassembled view of the structure of the present invention;

[0019] Figure 3 This is a schematic diagram of the left cross-sectional view of the torsion lock housing structure in this invention;

[0020] Figure 4 This is a top sectional view of the structure of the fastener in this invention;

[0021] Figure 5 For the present invention Figure 3 A magnified view of part A in the diagram;

[0022] Figure 6 For the present invention Figure 3 A magnified view of part B in the diagram.

[0023] In the diagram: 1. Twist lock housing; 2. Trigger groove; 3. First movable groove; 4. First rotating shaft; 5. Upper lock head; 6. Lower lock head; 7. Protrusion; 8. Second rotating shaft; 9. First bevel gear; 10. Second bevel gear; 11. Double-acting screw; 12. Second movable groove; 13. Slide groove; 14. First sliding sleeve; 15. Second sliding sleeve; 16. Connecting rod; 17. First gear plate; 18. Second gear plate; 19. Spring; 20. Connecting plate; 21. Hook; 22. Fixing component; 23. Groove; 24. Rack; 25. Metal strip; 26. Third gear; 27. Handle; 28. Screw sleeve. Detailed implementation method:

[0024] 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.

[0025] Please see Figure 1-6 The present invention provides an embodiment of a marine container twist lock and its lashing components, comprising a twist lock housing 1.

[0026] The front end of the twist lock housing 1 is provided with a trigger groove 2, and the inside of the twist lock housing 1 is provided with a first movable groove 3. A first rotating shaft 4 is rotatably installed in the first movable groove 3. An upper locking head 5 is fixedly installed at the lower end of the first rotating shaft 4, and a lower locking head 6 is fixedly installed at the upper end of the first rotating shaft 4. Both the upper and lower ends of the twist lock housing 1 are fixedly installed with protrusions 7. Limiting components are provided in both sets of first movable grooves 3, and locking components are provided in the first rotating shaft 4. This device places four sets of twist lock housings 1 at the four corners of the side where two sets of containers are attached, and the protrusions 7 at the upper and lower ends of the four sets of twist lock housings 1 are respectively locked in the reserved grooves on the two sets of containers. Then, rotating the first rotating shaft 4 drives the upper locking head 5 and the lower locking head 6 to rotate in the reserved grooves on the two sets of containers, and the limiting components limit the rotation to prevent it. When the locking components are rotated, they squeeze the limiting components to prevent them from being loosened by shaking during container transportation, thereby improving the stability and reliability of container docking. It also enables the continuous stacking of containers, and the container stacking connection locking is convenient.

[0027] Furthermore, the limiting assembly includes two sets of second sliding sleeves 15, which are disposed within two sets of first movable grooves 3. A connecting rod 16 is annularly inserted into each set of second sliding sleeves 15. A first gear 17 is disposed within each set of first movable grooves 3, and the two sets of first gear 17 are fixedly connected to multiple sets of connecting rods 16. A second gear 18 is fixedly installed at opposite ends of each set of first movable grooves 3. A spring 19 is disposed between each set of second sliding sleeves 15 and each set of first gear 17. This structure achieves this by placing the first rotating shaft 4 within the torsion lock housing 1. During internal rotation, the locking assembly first drives the two sets of second sliding sleeves 15 to adjust their positions up and down. The first rotating shaft 4 and the locking assembly drive the two sets of second sliding sleeves 15, multiple sets of connecting rods 16 and two sets of first gear discs 17 to rotate. When the two sets of first gear discs 17 rotate, they slide down under the action of the teeth at the lower end of the two sets of second gear discs 18. After the two sets of first gear discs 17 have finished rotating, they pop up under the action of the spring force of the two sets of springs 19 and fit tightly against the lower side of the two sets of second gear discs 18, thus limiting and fixing the first rotating shaft 4 after rotation.

[0028] Furthermore, the locking assembly includes a second rotating shaft 8, which is rotatably mounted inside the front end of the first rotating shaft 4. A first bevel gear 9 is rotatably mounted inside the first rotating shaft 4 and is fixedly connected to the rear end of the second rotating shaft 8. A second bevel gear 10 is rotatably mounted inside the first rotating shaft 4, and a bidirectional screw 11 is rotatably mounted inside the first rotating shaft 4. The second bevel gear 10 is fixedly connected to the bidirectional screw 11. Second movable grooves 12 and sliding grooves 13 are provided at both the upper and lower ends of the first rotating shaft 4, and the two sets of sliding grooves 13 are connected to the two sets of second movable grooves 12. First sliding sleeves 14 are threadedly fitted onto both the upper and lower ends of the bidirectional screw 11. This structure drives the first bevel gear 9 and the second bevel gear 10 to rotate via the second rotating shaft 8. The double-acting screw 11 rotates within the first rotating shaft 4, and through the rotation of the double-acting screw 11, it drives the two sets of first sliding sleeves 14 to slide. This causes the two sets of first sliding sleeves 14 to drive the two sets of second sliding sleeves 15 to slide and compress the two sets of springs 19. The two sets of second sliding sleeves 15 and the two sets of springs 19 are tightly attached to the two sets of first gear discs 17, preventing the two sets of first gear discs 17 from being shaken and compressing the two sets of springs 19. This prevents the two sets of first gear discs 17 from being rotated and opened from the two sets of second gear discs 18, improving the tightness of the two sets of first gear discs 17 being locked onto the two sets of second gear discs 18 at both ends. This completes the locking of the upper lock head 6 and the lower lock head 5 after rotation, preventing the first rotating shaft 4, upper lock head 6 and lower lock head 5 from twisting due to shaking during transportation after the two sets of containers are connected, thus improving stability and reliability.

[0029] Furthermore, the two sets of first gear discs 17 and the two sets of second gear discs 18 are arranged vertically opposite each other. The teeth on the sides of the two sets of first gear discs 17 and the two sets of second gear discs 18 are adapted to each other. Based on the arrangement of the two sets of first gear discs 17 and the two sets of second gear discs 18, this structure allows the two sets of first gear discs 17 to slide down under the pressure of the teeth on the lower side of the two sets of second gear discs 18 when rotating. Furthermore, when the two sets of first gear discs 17 and the two sets of second gear discs 18 are in contact, the position of the teeth on the two sets of first gear discs 17 and the two sets of second gear discs 18 ensures that the teeth on the two sets of first gear discs 17 and the two sets of second gear discs 18 are aligned. The teeth on the second gear disc 18 mesh and fit together, thereby limiting the fit between the two sets of first gear discs 17 and the two sets of second gear discs 18. The teeth on the second gear disc 18 can engage with the teeth on the first gear disc 17. When the two sets of second sliding sleeves 15 press against the two sets of first gear discs 17, the two sets of first gear discs 17 and the two sets of second gear discs 18 fit tightly together, thereby achieving the effect of preventing rotation when the two sets of first gear discs 17 and the two sets of second gear discs 18 fit together, improving the mutual engagement and anti-rotation effect of the two sets of first gear discs 17 and the two sets of second gear discs 18.

[0030] Furthermore, a connecting plate 20 is fixedly installed on the front right side of the twist lock housing 1. The connecting plate 20 has a through hole. This structure, through the connecting plate 20 installed on the front right side of the twist lock housing 1, facilitates the connection of the container lashing parts to the connecting plate 20 when the twist lock housing 1 is placed on the docking side of two sets of containers. This allows the lashing parts to be connected to each other through the connecting plate 20 on the twist lock housing 1 to secure the containers. It is also convenient to connect multiple twist lock housings 1 through the lashing parts. The lashing parts fit and limit one side of the container, which is convenient for securing containers that are stacked too high with the lashing parts. It is not necessary to connect the lashing parts to a central point, and it is also convenient to separate or connect the lashing parts to the twist lock housing 1.

[0031] Furthermore, the ends of the two sets of first sliding sleeves 14 and the two sets of second sliding sleeves 15 are located on the inner walls of the two sets of sliding grooves 13. The outer surfaces of the two sets of first sliding sleeves 14 and the inner walls of the two sets of second sliding sleeves 15 are the same as the diameter lines of the outer wall of the first rotating shaft 4 and the inner wall of the second movable groove 12, respectively. Based on the size of the outer wall of the first sliding sleeve 14 and the inner wall of the two sets of second sliding sleeves 15, this structure ensures that when the two sets of first sliding sleeves 14 and the two sets of second sliding sleeves 15 slide in the two sets of second movable grooves 12 and the two sets of sliding grooves 13, the two sets of first sliding sleeves 14 and the two sets of second sliding sleeves 15 are in contact with the outer walls of the two sets of second movable grooves 12 and the first rotating shaft 4, respectively. This prevents the two sets of first sliding sleeves 14 and the two sets of second sliding sleeves 15 from tipping over and getting stuck when they are driven to slide by the rotation of the bidirectional screw 11. Moreover, when the first rotating shaft 4 rotates, it can drive the two sets of first sliding sleeves 14 and the two sets of second sliding sleeves 15 to rotate synchronously.

[0032] Furthermore, in a marine container lashing device, a hook 21 is provided on the connecting plate 20. A fastener 22 is fixedly installed on the right end of the hook 21. A groove 23 is provided in the fastener 22. A rack 24 is movably inserted into the rear end of the groove 23. A metal strip 25 is fixedly installed on the right end of the rack 24. The right end of the metal strip 25 is provided with hooks 21, fasteners 22, and racks 24. A third gear 26 is rotatably installed in both sets of grooves 23. A handle 27 is fixedly installed on both sets of third gears 26. A threaded sleeve 28 is threaded into both sets of grooves 23. The two sets of threaded sleeves 28 are threaded onto the two sets of handles 27. This structure connects the two sets of hooks 21 to the front connecting plate of the twist lock housing 1 located inside the container. Connect 20 and turn the third gear 26 and handle 27 in the two sets of fixing parts 22. The two sets of handles 27 and the two sets of third gears 26 rotate to rotate and tighten the racks 24 in the two sets of fixing parts 22. The rotation and tightening of the racks 24 can straighten and tighten the metal strips 25. The two sets of handles 27 rotate and retract into the two sets of fixing parts 22 and align with the two sets of screw sleeves 28. Rotate the two sets of screw sleeves 28 and put them on the two sets of handles 27 to complete the binding and fixing of the container. The multiple sets of metal strips 25 required for fixing the container are arranged in a cross pattern to improve the firmness of the container binding. It is convenient to bind the container quickly and the structure is simple. It ensures that containers that are stacked too high will not tip over or tilt during transportation.

[0033] Furthermore, the upper and lower openings on the front side of the two sets of third gears 26 at one end of the two sets of grooves 23 are smaller than the upper and lower heights of the two sets of third gears 26. The upper and lower openings on the front side of the two sets of third gears 26 at one end of the two sets of grooves 23 are the same as the diameter of the two sets of handles 27. Based on the size of the upper and lower openings on the front side of the two sets of third gears 26 at one end of the two sets of grooves 23, when the two sets of handles 27 drive the two sets of third gears 26 to rotate in the two sets of grooves 23, the two sets of handles 27 can rotate on the side of the two sets of grooves 23 that is in contact with the two sets of third gears 26. Moreover, the two sets of third gears 26 are not subjected to enough force to shift and disengage from their positions in the two sets of grooves 23, which facilitates the limiting of the two sets of third gears 26.

[0034] Working principle: When docking and securing containers, such as Figure 3 , Figure 5 and Figure 6As shown, firstly, four sets of twist lock housings 1 are placed at the four corners of one side where the two sets of containers are attached, and the protrusions 7 on the upper and lower sides of the twist lock housings 1 are engaged with the reserved holes on the two sets of containers. Then, the first rotating shaft 4 is turned, and the rotation of the first rotating shaft 4 drives the upper locking head 5 and the lower locking head 6 to rotate in the reserved holes on the two sets of containers, thereby connecting the two sets of containers together. When the first rotating shaft 4 rotates, it drives the two sets of first sliding sleeves 14 and the two sets of second sliding sleeves 15 to rotate synchronously. The rotation of the two sets of second sliding sleeves 15 drives the two sets of first gear discs 17 to rotate through multiple sets of connecting rods 16. When the two sets of first gear discs 17 rotate on the two sets of second gear discs 18, they are moved downward in the first movable groove 3 by the action of the teeth on the two sets of second gear discs 18. The downward movement of the two sets of first gear discs 17 drives the multiple sets of connecting rods 16 to slide down on the two sets of second sliding sleeves 15. After the two sets of first gear discs 17 have finished rotating, the two sets of first gear discs 17 are rebounded by the two sets of springs 19. Under the action of force, it pops out and fits against the two sets of second gear discs 18, and the teeth on the two sets of first gear discs 17 and the two sets of second gear discs 18 engage. Then, the second rotating shaft 8 is rotated, which drives the first bevel gear 9 and the second bevel gear 10 to rotate. The rotation of the second bevel gear 10 drives the double-acting screw 11 to rotate within the first rotating shaft 4. The rotation of the double-acting screw 11 drives the two sets of first sliding sleeves 14 to slide within the two sets of second movable grooves 12 and the two sets of sliding grooves 13. The two sets of first sliding sleeves 14 drive the two sets of second sliding sleeves 15 to slide within the first movable groove 3. As the two sets of second sliding sleeves 15 slide, they compress the two sets of springs 19 and the two sets of first gear discs 17, so that the two sets of first gear discs 17 are tightly fitted against the two sets of second gear discs 18. This can lock and fix the two sets of first gear discs 17 and the two sets of second gear discs 18, preventing the first rotating shaft 4 from rotating and resetting after driving the upper locking head 5 and the lower locking head 6 to fix the container. When tying the container, if Figure 1 , Figure 4 As shown, firstly, the two sets of hooks 21 are attached to the front connecting plates 20 of the diagonally opposite torsion lock housing 1. Then, the handle 27 is turned to drive the third gear 26 to rotate. When the third gear 26 rotates in the groove 23, it drives the rack 24 to slide and tighten into the groove 23. As the third gear 26 rotates and pulls the rack 24, the metal strip 25 is straightened and tightened, thus achieving the effect of securing the container. Furthermore, the multiple sets of metal strips 25 used to secure the container are arranged in a crisscross pattern to improve the firmness of the container when it is secured, thereby ensuring that containers that are stacked too high will not tip over or tilt during transportation. The above is the complete working principle of this invention.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A marine container twist lock, comprising a twist lock housing (1), characterized in that: The front end of the twist lock housing (1) is provided with a trigger groove (2). A connecting plate (20) is fixedly installed on the right side of the front end of the twist lock housing (1). A through hole is provided in the connecting plate (20). A first movable groove (3) is provided in the twist lock housing (1). A first rotating shaft (4) is rotatably installed in the first movable groove (3). An upper locking head (5) is fixedly installed at the lower end of the first rotating shaft (4). A lower locking head (6) is fixedly installed at the upper end of the first rotating shaft (4). Protrusions (7) are fixedly installed at both the upper and lower ends of the twist lock housing (1). Limiting components are provided in both sets of the first movable grooves (3). The limiting components include two sets. The second sliding sleeve (15) is provided in two sets of first movable grooves (3). A connecting rod (16) is inserted into each set of second sliding sleeves (15) in a ring. A first gear plate (17) is provided in each set of first movable grooves (3). The two sets of first gear plates (17) and two sets of second gear plates (18) are arranged opposite each other. The teeth of the first gear plates (17) and the second gear plates (18) are matched on the same side. The first gear plates (17) are fixedly connected to multiple sets of connecting rods (16). A second gear plate (18) is fixedly installed in the opposite ends of the two sets of first movable grooves (3). A spring (19) is provided between the second sliding sleeve (15) and the two sets of first gear discs (17). A locking assembly is provided inside the first rotating shaft (4). The locking assembly includes a second rotating shaft (8), which is rotatably installed inside the front end of the first rotating shaft (4). A first bevel gear (9) is rotatably installed inside the first rotating shaft (4). The first bevel gear (9) is fixedly connected to the rear end of the second rotating shaft (8). A second bevel gear (10) is rotatably installed inside the first rotating shaft (4). A double-acting screw (11) is rotatably installed inside the first rotating shaft (4). The second bevel gear (10) and the double-acting screw (11) are connected. The first rotating shaft (4) is fixedly connected. The upper and lower ends of the first rotating shaft (4) are provided with second movable grooves (12). The upper and lower ends of the first rotating shaft (4) are provided with sliding grooves (13). The two sets of sliding grooves (13) are connected to the two sets of second movable grooves (12). The upper and lower ends of the bidirectional screw (11) are threaded with first sliding sleeves (14). The ends of the two sets of first sliding sleeves (14) and the two sets of second sliding sleeves (15) are located on the inner wall of the two sets of sliding grooves (13). The outer surface of the two sets of first sliding sleeves (14) and the inner wall of the two sets of second sliding sleeves (15) are the same as the outer wall of the first rotating shaft (4) and the inner wall of the second movable groove (12) respectively.

2. The marine container twist lock according to claim 1, characterized in that: The connecting plate (20) is provided with a hook (21), and a fixing part (22) is fixedly installed on the right end of the hook (21). A groove (23) is provided in the fixing part (22). A rack (24) is movably inserted in the rear end of the groove (23). A metal strip (25) is fixedly installed on the right end of the rack (24). The right end of the metal strip (25) is provided with a hook (21), a fixing part (22) and a rack (24). A third gear (26) is rotatably installed in both sets of grooves (23). A handle (27) is fixedly installed on both sets of third gears (26). A threaded sleeve (28) is installed in both sets of grooves (23) by threads. The two sets of threaded sleeves (28) are threaded onto the two sets of handles (27).

3. A marine container twist lock according to claim 2, characterized in that: The upper and lower openings of the front side of the two sets of third gears (26) at one end of the two sets of grooves (23) are smaller than the upper and lower heights of the two sets of third gears (26). The upper and lower openings of the front side of the two sets of third gears (26) at one end of the two sets of grooves (23) are the same as the diameter of the two sets of handles (27).

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