Container bottom safety hook device
By using a safety locking hook device at the bottom of the container, the rotation of the transmission plate and the pin is driven by the operating shaft, ensuring that the hook lock slowly disengages from the hook pin, thus solving the safety hazards during container unloading and improving the safety of the unloading process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CXIC STAR CONTAINER (QINGDAO) CO LTD
- Filing Date
- 2025-06-11
- Publication Date
- 2026-06-19
AI Technical Summary
When loading irregular bulk cargo, existing containers are prone to safety hazards during unloading due to the opening of corner fittings and locks, especially when personnel are standing at the door, there is a risk of objects rolling off.
Design a safety locking hook device for the bottom of a container. The operating shaft drives the rotation of the transmission plate and the pin, so that the hook lock slowly disengages from the pin. This ensures that the container door can only be opened after the hook lock is completely disengaged, preventing objects from rolling out when the door is opened quickly.
It improves the safety of container use, prevents objects from rolling out due to rapid door opening, and enhances the safety of the unloading process.
Smart Images

Figure CN224376580U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of container technology, specifically to a safety locking hook device for the bottom of a container. Background Technology
[0002] With the accelerating pace of globalization and the booming development of international trade, the demand for long-distance transportation of goods has increased dramatically. This has spurred the need for efficient, convenient, and safe transportation equipment, leading to the development of shipping containers. In terms of structural design, containers require a rational spatial layout to accommodate various types of goods. They typically adopt a rectangular shape for easy stacking and transportation. From a materials perspective, high-strength steel is widely used in container manufacturing due to its excellent compressive strength and corrosion resistance. For example, to prevent seawater erosion, the outer steel of the container undergoes special anti-corrosion treatment.
[0003] The bottom of a common container is usually secured by corner fittings and locks. However, this method is problematic because the container may contain irregularly shaped bulk cargo. When unloading, the container can be opened by simply opening the corner fittings and locks. This poses a safety hazard for personnel standing at the container door, and does not meet the operational requirements of the container. Therefore, a safety locking hook device for the bottom of a container is proposed. Utility Model Content
[0004] (a) Technical problems to be solved
[0005] To address the shortcomings of existing technologies, this utility model provides a safety locking hook device for the bottom of a container. This device solves the technical problem that when unloading irregular bulk goods loaded inside a container, the door can be opened by simply opening the corner fittings and locks. However, this can create a safety hazard for personnel standing at the container door.
[0006] (II) Technical Solution
[0007] To achieve the above objectives, this utility model provides the following technical solution: a container bottom safety locking hook device, comprising:
[0008] The box body has a door hinged to the lower left side. A hinge seat is installed on the left side of the box body at the lower part of the door. A bottom hook seat plate is installed on the outer side of the hinge seat through bearings.
[0009] The hook lock is hinged to the front and rear sides of the box body by bearings. An operating shaft is connected to the outside of the box body at the lower part of the hook lock by bearings. A transmission plate is installed on the outside of the operating shaft.
[0010] A transmission groove is formed in the middle of the transmission plate. A pin is inserted into the transmission groove, and the inner end of the pin is connected to the corresponding position on the surface of the hook lock. A hook pin is connected to the lower front side of the bottom hook base plate.
[0011] Preferably, a paddle is installed at the front end of the operating shaft, and both sides of the transmission groove are arc-shaped. The added paddle facilitates the rotation of the operating shaft.
[0012] Preferably, limit brackets are installed on the exterior of the box body at the upper and lower sides of the hook lock. The limit brackets are all L-shaped and can limit the hook lock.
[0013] Preferably, the outer side of the box is connected to a mounting plate on the upper side of the hook lock, and a plug rod is inserted into the middle of the inner side of the mounting plate.
[0014] Preferably, a limit block is installed at the bottom end of the insertion rod, a limit slot is opened at the top of the hook lock corresponding to the limit block, and a top seat is installed at the top end of the insertion rod.
[0015] Preferably, bolts are inserted inside the top seat, and the inner side of the bolts is screwed into the corresponding position of the box body. A spring is sleeved on the outside of the insertion rod. The limiting block is inserted into the limiting slot through the insertion rod, and the bolt is screwed into the inside of the top seat to limit the hook lock.
[0016] (III) Beneficial Effects
[0017] Compared with the prior art, this utility model provides a container bottom safety locking hook device, which has the following beneficial effects:
[0018] The safety locking hook device at the bottom of the container rotates by turning the operating shaft, which drives the transmission plate to rotate. This, in turn, drives the pin and hook lock to rotate through the transmission groove, causing the left end of the hook lock to disengage from the pin. This prevents the container door from opening even after the corner fittings and locks are engaged, as the hook lock and pin remain in place. The door can only be opened when the left end of the hook lock slowly disengages from the pin. This prevents objects from rolling out when the door is opened quickly, thus improving the safety of the container during use. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of this utility model;
[0020] Figure 2 This is a schematic diagram of the operating shaft structure of this utility model;
[0021] Figure 3 This is a schematic diagram of the hook lock structure of this utility model;
[0022] Figure 4This is a schematic diagram of the mounting plate and insert rod structure of this utility model.
[0023] In the diagram: 1. Box body; 2. Box door; 3. Hinge seat; 4. Bottom hook seat plate; 41. Hook pin; 5. Hook lock; 6. Operating shaft; 7. Paddle; 8. Transmission plate; 9. Transmission groove; 10. Pin; 11. Limit slot; 12. Limit angle code; 13. Mounting plate; 14. Insert rod; 15. Limiting block; 16. Top seat; 17. Bolt. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] This utility model provides a technical solution: a container bottom safety locking hook device, including a container body 1, a container door 2, a hinge seat 3, a bottom hook seat plate 4, a hook pin 41, a hook lock 5, an operating shaft 6, a lever 7, a transmission plate 8, a transmission groove 9, a pin 10, a limit slot 11, a limit angle code 12, a mounting plate 13, a plug rod 14, a limit block 15, a top seat 16, and bolts 17.
[0026] Please see Figure 1 A door 2 is hinged to the lower left side of the box body 1. A hinge seat 3 is installed on the left side of the box body 1 at the lower part of the door 2. A bottom hook seat plate 4 is installed on the outer side of the hinge seat 3 through a bearing.
[0027] Hook lock 5 is hinged to the front and rear sides of housing 1 via bearings. An operating shaft 6 is connected to the exterior of housing 1, below hook lock 5, via bearings. (See [link to relevant documentation]). Figure 2 A transmission plate 8 is installed on the outside of the operating shaft 6;
[0028] Transmission groove 9 is located in the middle of the interior of transmission plate 8. Please refer to [link / reference]. Figure 1 A pin 10 is inserted into the transmission groove 9, and the inner end of the pin 10 is connected to the corresponding position on the surface of the hook lock 5. A hook pin 41 is connected to the lower front side of the bottom hook base plate 4. Please refer to [link / reference]. Figure 2 The operating shaft 6 has a paddle 7 installed at its front end, and the transmission groove 9 has arc-shaped features on both the left and right sides. Please refer to [link / reference]. Figure 1Limiting corner brackets 12 are installed on the upper and lower sides of the hook lock 5 on the outside of the container body 1. The limiting corner brackets 12 are all L-shaped. By rotating the operating shaft 6, the transmission plate 8 is rotated, which in turn drives the pin 10 and the hook lock 5 to rotate through the transmission groove 9. This causes the left end of the hook lock 5 to disengage from the hook pin 41. After the corner piece and lock of the container door 2 are opened, the container door 2 will not open due to the presence of the hook lock 5 and the hook pin 41. The container door 2 can only be opened when the left end of the hook lock 5 slowly disengages from the hook pin 41. This prevents objects from rolling off due to rapid opening when the door is opened, thus improving the safety of the container during use.
[0029] Please see Figure 1 Mounting plates 13 are connected to the exterior of the housing 1, located above the hook lock 5. Please refer to [link / reference]. Figure 4 A rod 14 is inserted into the middle of the interior of the mounting plate 13, and a limit block 15 is installed at the bottom end of the rod 14. Please refer to [link / reference]. Figure 3 A limit slot 11 is provided at the top of the hook lock 5, corresponding to the position of the limit block 15. Please refer to [link / reference]. Figure 4 A top seat 16 is installed at the top of the insertion rod 14. Bolts 17 are inserted inside the top seat 16. The inner side of the bolts 17 is screwed to the corresponding position of the box 1. A spring is sleeved on the outside of the insertion rod 14.
[0030] This solution rotates the operating shaft 6 to drive the transmission plate 8, which in turn drives the pin 10 and hook lock 5 to rotate via the transmission groove 9. This causes the left end of the hook lock 5 to disengage from the hook pin 41. As a result, after the corner fittings and locks of the container door 2 are opened, the container door 2 will not open due to the presence of the hook lock 5 and hook pin 41. The container door 2 can only be opened when the left end of the hook lock 5 slowly disengages from the hook pin 41. This prevents objects from rolling off due to rapid opening of the door, thus improving the safety of the container during use.
[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A container bottom safety locking hook device, characterized in that, include: Box body (1), a box door (2) is hinged to the lower left side of the box body (1), a hinge seat (3) is installed on the left side of the box body (1) at the lower part of the box door (2), and a bottom hook seat plate (4) is installed on the outer side of the hinge seat (3) through a bearing. Hook lock (5) is hinged to the front and rear sides of the box body (1) by bearings. The outside of the box body (1) is connected to the lower part of the hook lock (5) by bearings, and the outside of the operating shaft (6) is equipped with a transmission plate (8). The transmission groove (9) is located in the middle of the transmission plate (8). A pin (10) is inserted into the transmission groove (9), and the inner end of the pin (10) is connected to the corresponding position of the surface of the hook lock (5). A hook pin (41) is connected to the lower front side of the bottom hook base plate (4).
2. The container bottom safety locking hook device according to claim 1, characterized in that: The front end of the operating shaft (6) is equipped with a paddle (7), and the left and right sides of the transmission groove (9) are both arc-shaped.
3. A container bottom safety locking hook device according to claim 1, characterized in that: Limiting angle brackets (12) are installed on the outside of the box (1) on both the upper and lower sides of the hook lock (5), and the limiting angle brackets (12) are all L-shaped.
4. A container bottom safety locking hook device according to claim 1, characterized in that: The outer side of the box (1) is connected to a mounting plate (13) on the upper side of the hook lock (5), and a plug rod (14) is inserted in the middle of the inner side of the mounting plate (13).
5. A container bottom safety locking hook device according to claim 4, characterized in that: The bottom end of the insertion rod (14) is equipped with a limiting block (15), the top of the hook lock (5) is provided with a limiting slot (11) corresponding to the limiting block (15), and the top end of the insertion rod (14) is equipped with a top seat (16).
6. A container floor security hook arrangement according to claim 5, wherein: Bolts (17) are inserted inside the top seat (16), and the inner side of the bolts (17) is screwed to the corresponding position of the box body (1). A spring is sleeved on the outside of the insertion rod (14).