A lock for a hard top cover of a container
By designing a container hard top cover lock with a hook-shaped locking bar and a U-shaped customs pressure plate structure, the problems of lock wear and inconvenient operation were solved, achieving accurate lock head positioning, paint protection, and easy operation.
Patent Information
- Application Number
- CN202522114936.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-29
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-29
AI Technical Summary
Existing container hard top cover locks are prone to scratching the paint on the corrugated plate during use, have large positional errors in the lock head, are inconvenient to operate, and suffer severe wear.
A hook-shaped locking bar structure was designed, which enables the parallel movement of the locking bar through the lock guide sleeve, eliminating the need for locking pins and chains. Combined with the design of a U-shaped customs pressure plate and a handle fixing seat, it ensures that the lock head and the guide sleeve axis are aligned, reducing wear and jamming.
It avoids scratches on the corrugated plate paint, ensures accurate lock cylinder positioning, facilitates easy operation, reduces wear, and improves the lifespan and operational flexibility of the lock.
Smart Images
Figure CN224679331U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to shipping containers, and more particularly to a lock for a shipping container hard top cover. Background Technology
[0002] Containers have become a standard international transport tool for multimodal transport. Conventional containers have enclosed top and side panels, with only an end door at each end for loading and unloading goods. Figure 1 and Figure 2 As shown. When some goods are long or heavy, loading and unloading from the end door is inconvenient. Therefore, the top cover of the container is designed as an openable hard top cover structure. Multiple locks are installed on both sides of the hard top cover for securing it to the container body. During loading and unloading, the locks on the hard top cover are first released, then the hard top cover is removed, and the goods are hoisted in and out of the container through the top opening. Figures 3 to 6 As shown. Common container hard top cover locks work by rotating a handle, causing the lock head to lift or tighten, while a locking pin is inserted between the lock handle and the lock mounting base to complete the locking. However, this method often has the following problems in actual use: 1. Inserting the locking pin is inconvenient. The locking pin is fixed to the lock mounting base by a chain, and the locking pin and chain are prone to friction or collision with the corrugated plate on the outside of the container, causing scratches and wear on the paint on the corrugated plate, affecting the appearance of the container; 2. When the lock is opened or closed, the lock head neck of the lock bar moves up and down in the lock guide sleeve on the upper side beam. Due to the structure of the lock, the movement direction of the lock bar is not completely aligned with the axis of the guide sleeve, resulting in a small included angle. This causes friction between the lock head neck and the lock guide sleeve. Therefore, the inner hole of the lock guide sleeve is usually much larger than the diameter of the lock head neck. This can easily lead to problems such as large errors in the position of the lock head extension, inconvenient operation, or wear on the lock head neck and the inner hole of the lock guide sleeve. Utility Model Content
[0003] The purpose of this utility model is to provide a lock structure for container hard top covers that is simple and reliable, can avoid paint scratches on corrugated plates, has the lock head extended in the correct position with small errors, is easy and flexible to operate, and has minimal wear on the lock head neck and the inner hole of the lock guide sleeve.
[0004] To achieve the above requirements, this utility model is implemented as follows: It is characterized by including a hook-shaped locking rod with a clamping lock head extending from the top surface of the square tube of the upper side beam of the container. A lock guide sleeve is fixed on the square tube of the upper side beam at the neck position of the locking rod. A thread is formed at the tail of the locking rod and connected to the lock for opening the top of the container. The lock includes a U-shaped handle fixing seat fixed to the outer side of both side wall panels. A handle is connected to the two lugs of the handle fixing seat via a handle pivot. H-shaped connecting rods are fixed to both sides of the handle via a lower pivot. An upper pivot is connected to the upper end of the H-shaped connecting rod. A radial through hole is formed in the middle of the upper pivot. The tail of the locking rod is inserted into the through hole and... The extension length of the lock rod is adjusted by screwing the nut at the end of the lock rod. A U-shaped lock fixing seat with one side open is fixed on the side wall plate directly below the U-shaped handle fixing seat. The two lugs of the U-shaped lock fixing seat have through holes. A U-shaped customs pressure plate is connected to the through hole on the open side through a rotating shaft. The two lugs of the U-shaped customs pressure plate have connecting holes. When the customs pressure plate rotates around the rotating shaft to the position where the lugs of the U-shaped lock fixing seat coincide, the through hole on the lug of the U-shaped lock fixing seat coincides with the connecting hole on the lug of the U-shaped customs pressure plate. This allows customs seals to be installed in the through hole on the lug of the U-shaped lock fixing seat and the connecting hole on the lug of the U-shaped customs pressure plate after the lock is locked.
[0005] The customs pressure plate has outward-facing stops on its lugs to limit the rotation angle of the customs pressure plate and ensure that the through holes on the lock fixing seat lugs coincide with the connecting holes on the customs pressure plate lugs.
[0006] The handle fixing seat and the lock fixing seat are made as one piece.
[0007] A lock for a container hard top cover designed according to the above scheme eliminates the locking pin and chain in traditional lock structures. The locking rod can move parallel to the axis of the lock guide sleeve, reducing wear and jamming. It features a simple structure, convenient manufacturing, flexible and easy operation, and will not scratch the paint on the corrugated sheet on the side of the container. Attached Figure Description
[0008] Figure 1 This is a front view of an existing container with end doors at each end;
[0009] Figure 2 yes Figure 1 The left view;
[0010] Figure 3 This is a front view of an existing container with an openable hard top cover structure.
[0011] Figure 4 yes Figure 3 View from direction A;
[0012] Figure 5 yes Figure 3 A magnified view of the lock in the closed state in area B;
[0013] Figure 6 yes Figure 5 A 3D view of the lock in the open position;
[0014] Figure 7 This is the front view of the container of this utility model;
[0015] Figure 8 yes Figure 7 A magnified view of the lock's closed state in area C;
[0016] Figure 9 yes Figure 8 A 3D view of the lock in the open position.
[0017] In the diagram: 1. Upper side beam square tube; 2. Lock head; 3. Lock rod; 4. Lock guide sleeve; 5. Lock; 6. Side wall panel; 7. Handle fixing seat; 8. Handle pivot; 9. Handle; 10. Lower shaft; 11. H-shaped connecting rod; 12. Upper shaft; 13. Nut; 14. Lock fixing seat; 15. Through hole; 16. Pivot; 17. Customs pressure plate; 18. Connecting hole; 19. Stop block. Detailed Implementation
[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0019] Figures 7 to 9This is a schematic diagram of the lock structure for a container using a hard top cover according to this utility model. As shown in the diagram, it includes a hook-shaped locking rod 3 with a clamping lock head 2 extending from the top surface of the square tube 1 of the upper side beam of the container. A lock guide sleeve 4 is fixed to the square tube 1 of the upper side beam at the neck position of the locking rod 3. The tail of the locking rod 3 is threaded and connected to a lock 5 for opening the container. The lock 5 includes a U-shaped handle fixing seat 7 fixed to the outer surface of the two side wall panels 6. A handle 9 is connected to the two lugs of the handle fixing seat 7 via a handle pivot 8. H-shaped connecting rods 11 are fixed to both sides of the handle 9 via a lower shaft 10. An upper shaft 12 is connected to the upper end of the H-shaped connecting rod 11. A radial through hole (not shown) is formed in the middle of the upper shaft 12. The tail of the locking rod 3 is inserted into the through hole and screwed into the lock. Two nuts 13 at the tail of rod 3 adjust the extension length of the lock rod. A U-shaped lock fixing seat 14 with one side open is fixed on the side wall plate 6 directly below the U-shaped handle fixing seat 7. The two lugs of the U-shaped lock fixing seat 14 have through holes 15. A U-shaped customs pressure plate 17 is connected to the through hole 15 on the open side through a rotating shaft 16. The two lugs of the U-shaped customs pressure plate 17 have connecting holes 18. When the customs pressure plate 17 rotates around the rotating shaft 16 to the position where the lugs of the U-shaped lock fixing seat 14 overlap, the through hole 15 on the lugs of the U-shaped lock fixing seat 14 overlaps with the connecting hole 18 on the lugs of the U-shaped customs pressure plate 17, so that after the lock is locked, customs seals can be installed in the through hole 15 on the lugs of the U-shaped lock fixing seat 14 and the connecting hole 18 on the lugs of the U-shaped customs pressure plate 17. The U-shaped customs pressure plate 17 has outwardly turned stops 19 on its lugs to limit the rotation angle of the U-shaped customs pressure plate 17, ensuring that the through hole 15 on the lug of the U-shaped lock fixing seat 14 coincides with the connecting hole 18 on the lug of the U-shaped customs pressure plate 17. Alternatively, the U-shaped handle fixing seat 7 and the U-shaped lock fixing seat 14 can be connected together via a connecting plate to form a single unit (not shown in the figure).
Claims
1. A lock for a container hard top cover, characterized in that: It includes a hook-shaped locking bar with a clamping lock head extending from the top surface of the square tube of the upper side beam of the container. A lock guide sleeve is fixed on the square tube of the upper side beam at the neck position of the locking bar. The tail of the locking bar is threaded and connected to the lock for opening the top box. The lock includes a U-shaped handle fixing seat fixed to the outer side of the two side wall panels. A handle is connected to the two lugs of the handle fixing seat via a handle pivot. H-shaped connecting rods are fixed to both sides of the handle via a lower pivot. An upper pivot is connected to the upper end of the H-shaped connecting rod. A radial through hole is formed in the middle of the upper pivot. The tail of the locking bar is inserted into the through hole, and the lock is adjusted by screwing a nut on the tail of the locking bar. The extension length of the rod is fixed to a U-shaped lock fixing seat with one side open on the side wall plate directly below the U-shaped handle fixing seat. The two lugs of the U-shaped lock fixing seat have through holes. A U-shaped customs pressure plate is connected to the through hole on the open side through a pivot. The two lugs of the U-shaped customs pressure plate have connecting holes. When the customs pressure plate rotates around the pivot to the position where the lugs of the U-shaped lock fixing seat coincide, the through hole on the lug of the U-shaped lock fixing seat coincides with the connecting hole on the lug of the U-shaped customs pressure plate. This allows customs to be installed in the through hole on the lug of the U-shaped lock fixing seat and the connecting hole on the lug of the U-shaped customs pressure plate after the lock is locked.
2. The lock for a container hard top cover according to claim 1, characterized in that: The lugs of the customs pressure plate are provided with outward-facing stops to limit the rotation angle of the customs pressure plate and ensure that the through holes on the lock fixing seat lugs coincide with the connecting holes on the customs pressure plate lugs.
3. The lock for a container hard top cover according to claim 1, characterized in that: The handle fixing seat and the lock fixing seat are made as one piece.