Anti-falling automatic falling-off device for container falling test

Abstract

The utility model discloses an anti-falling automatic dropping device for a container drop test, which belongs to the technical field of container test and inspection and comprises a main body support, a rotary support lug and a suspender, and an upper lifting lug is arranged at the top end of the main body support; one end of the rotary support lug is hinged with the main body bracket; the other end of the rotary support lug is hinged with the auxiliary hook lifting ring; a tension spring is arranged between the rotary support lug and the main body bracket; a through hole is formed in the body support, the suspender is movably matched in the through hole, and a lower lifting lug is arranged at the bottom end of the suspender. A linkage mechanism capable of locking the suspender is arranged between the rotary support lug and the main body bracket; after the rotary supporting lug rotates upwards, the linkage mechanism can unlock the hanging rod; the main body support is provided with an anti-disengaging piece for preventing the hanging rod from disengaging from the through hole. Through the arrangement of the linkage mechanism, on the basis of the overall gravity of the suspender and the container connected to the suspender, the positioning tenon rotates outwards to relieve mechanical locking of the suspender, and then the automatic falling action of the container is achieved, and manual operation is not needed any more.

Description

Technical Field

[0001] This utility model belongs to the field of container testing and inspection technology, specifically relating to an automatic anti-fall device for container drop tests. Background Technology

[0002] In the globalized logistics and transportation industry, containers have become the preferred choice in logistics and transportation processes due to their modularity, integration, and ease of transshipment. As the main carrier of goods, containers need to be placed onto transport vehicles using lifting equipment, whether by road, rail, or ocean freight. Because containers are very heavy when fully loaded, they are susceptible to impact from road bumps, vehicle swaying, or drops during lifting, resulting in damage to both the container and the cargo.

[0003] To avoid the above losses, drop tests are conducted during the manufacturing process of containers to simulate extreme situations encountered during container transportation. The test results are used to adjust the container's design parameters, thereby ensuring that the container and cargo are not damaged to the greatest extent possible when subjected to impact.

[0004] Currently, most devices for conducting container drop tests require manual operation to perform the drop action.

[0005] Based on this, this application provides an automatic anti-fall device for container drop testing, which can perform drop tests on containers. Through the setting of the linkage mechanism, based on the overall weight of the boom and the container connected to it, the positioning tenon rotates outward to release the mechanical lock on the boom, thereby realizing the automatic drop action of the container, eliminating the need for manual operation. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide an automatic anti-fall device for container drop tests.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An automatic anti-fall device for container drop tests includes a main support frame, rotating lugs, and a boom;

[0009] The top of the main support frame is provided with a lifting lug;

[0010] One end of the rotating lug is hinged to the upper part of the main support, and the other end of the rotating lug is hinged to an auxiliary hook lifting ring;

[0011] A tension spring is provided between the rotating lug and the main support to pull the rotating lug downwards;

[0012] The main support frame has a through hole extending vertically to the bottom, and the suspension rod is movably fitted into the through hole in the vertical direction. The bottom end of the suspension rod is provided with a lower lifting lug.

[0013] A linkage mechanism is provided between the rotating lug and the main support to lock the boom and prevent it from falling; after the rotating lug rotates upward, the linkage mechanism can release the locking of the boom.

[0014] The main support frame is equipped with an anti-detachment component to prevent the suspension rod from coming out of the through hole.

[0015] Preferably, the main support is provided with two parallel fixed lugs, and the main support between the two fixed lugs is provided with a mating hole that extends to the through hole, and both fixed lugs are provided with an oblong hole.

[0016] The linkage mechanism includes a connecting arm and a positioning tenon;

[0017] The upper end of the connecting arm is hinged to the rotating support lug, and the lower end of the connecting arm is provided with a first pin, which fits into the waist-shaped hole.

[0018] The bottom end of the positioning tenon is rotatably fitted between two fixed lugs;

[0019] When the positioning tenon rotates, one side of its upper part can rotate and extend into the mating hole to form a positioning locking part. The rod is provided with a rod locking part. When the positioning locking part and the rod locking part are engaged, the rod is locked. When the first pin is located at the lower end of the waist-shaped hole, it can prevent the positioning locking part from coming out of the mating hole. After the first pin moves up along the waist-shaped hole, the positioning locking part can rotate and disengage from the mating hole to release the locking of the rod.

[0020] Preferably, the positioning locking part is provided with a positioning mating inclined surface, and the lifting rod locking part is provided with a lifting rod mating inclined surface;

[0021] When the inclined surface of the hanger is engaged downwards on the inclined surface of the positioning engagement surface, the force transmitted from the inclined surface of the hanger to the inclined surface of the positioning engagement surface generates a torque that causes the positioning tenon to rotate away from the engagement hole.

[0022] Preferably, the positioning and mating inclined surface slopes downwards from left to right.

[0023] Preferably, the distance from the center axis of the bottom rotation shaft of the positioning tenon to the bottom end of the positioning and fitting inclined surface is l1, the distance from the center axis of the bottom rotation shaft of the positioning tenon to the top end of the positioning and fitting inclined surface is l2, and the vertical distance from the center axis of the bottom rotation shaft of the positioning tenon to the positioning and fitting inclined surface is l. <l1<l2。

[0024] Preferably, a limiting block is provided between the two fixed lugs to limit the outward rotation position of the positioning tenon.

[0025] Preferably, one end of the positioning tenon is provided with an arc-shaped groove that can be adapted to the outer wall of the first pin.

[0026] When the first pin is located at the lower end of the waist-shaped hole and the first pin is engaged in the arc-shaped groove, the positioning and locking part extends into the mating hole.

[0027] Preferably, the anti-detachment component is an anti-detachment pin disposed at the lower end of the through hole; when the lifting rod falls along the through hole, the lifting rod, in conjunction with the inclined surface, presses against the anti-detachment pin to prevent the lifting rod from detaching from the through hole.

[0028] Preferably, the connecting arm includes two connecting plates that are parallel in the front-rear direction, the first pin is disposed between the lower parts of the two connecting plates, the second pin is disposed between the upper parts of the two connecting plates, and the second pin is connected to the rotating lug.

[0029] The two connecting plates are located outside the two fixed lugs.

[0030] Preferably, the positioning tenon includes two positioning plates that are parallel in the front-rear direction, a sleeve is fixedly provided between the lower parts of the two positioning plates, a rotating shaft is coaxially provided inside the sleeve, and the two ends of the rotating shaft are connected to corresponding fixed lugs.

[0031] A reinforcing plate is installed between the upper parts of the two positioning plates;

[0032] The positioning and mating inclined surface is located on the positioning plate.

[0033] The beneficial effects of this utility model are:

[0034] (1) By setting up a linkage mechanism, this utility model uses the overall weight of the boom and the container connected to it to release the mechanical lock on the boom by rotating the positioning tenon outward, thereby realizing the automatic drop action of the container, eliminating the need for manual operation.

[0035] (2) When using this utility model, after the test container is landed, the anti-detachment pin will prevent the lifting rod from coming out of the through hole, so that the lifting chain, lower lifting lug and other lifting tools will be suspended above the test container and will not fall down. This means that the lifting tools will not fall directly onto the test container, and will not cause unnecessary structural damage to the top plate of the container, thus reducing the cost of later container maintenance.

[0036] (3) This utility model is easy to connect with cranes, lifting tools and containers, and can be used with cranes to conduct tests at different heights according to test requirements.

[0037] (4) Using this utility model to conduct drop tests on containers is convenient, efficient, easy to operate, highly repeatable, and can greatly shorten the test time. Attached Figure Description

[0038] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0039] Figure 1 This is a schematic diagram of the structure of the automatic anti-fall device for container drop testing of this utility model;

[0040] Figure 2 This is a schematic diagram showing the fit of the main support, rotating lug, connecting arm, and positioning tenon in this utility model.

[0041] Figure 3 This is a diagram showing the positional relationship between the positioning and fitting inclined surface and the rotating shaft in this utility model;

[0042] Figure 4 This is a force decomposition diagram of the positioning and fitting inclined surface in this utility model;

[0043] Figure 5 This is a schematic diagram of the structure of the positioning tenon releasing the mechanical lock on the lifting rod in this utility model;

[0044] Figure 6 This is a schematic diagram of the main support structure in this utility model;

[0045] Figure 7 This is a schematic diagram of the positioning tenon in this utility model;

[0046] Figure 8 This is a schematic diagram of the structure of the suspension rod in this utility model;

[0047] Figure 9 This is a schematic diagram showing the test container not falling during the use of this utility model;

[0048] Figure 10 This is a schematic diagram of the test container falling during the use of this utility model;

[0049] in:

[0050] 1. Main support frame; 101. Through hole; 102. Fixed lug; 103. Mating hole; 104. Waist-shaped hole; 105. Limiting block; 2. Rotating lug; 3. Lifting rod; 301. Lifting rod locking part; 302. Lifting rod mating slope; 303. First vertical side; 304. Second vertical side; 4. Upper lifting lug; 5. Auxiliary hook lifting ring; 6. Tension spring; 7. Lower lifting lug; 8. Connecting arm; 801. First pin; 802. Connecting plate; 803. Second pin; 9. Positioning tenon; 901. Positioning locking part; 902. Positioning mating slope; 903. Positioning plate; 904. Sleeve; 905. Rotating shaft; 906. Reinforcing plate; 907. Arc groove; 10. Anti-detachment pin; 11. Lifting chain; 12. Lifting ring. Detailed Implementation

[0051] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0052] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0053] In this utility model, terms such as "upper", "lower", "bottom", and "top" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of the structural relationship between the various components or elements of this utility model and do not specifically refer to any component or element in this utility model. They should not be construed as limiting this utility model.

[0054] In this utility model, terms such as "connected" and "linked" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be determined according to the specific circumstances, and should not be construed as a limitation of this utility model.

[0055] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0056] See Figures 1-10 An automatic anti-fall device for container drop testing includes a main support 1, a rotating lug 2, and a boom 3;

[0057] The top of the main support 1 is provided with an upper lifting lug 4;

[0058] One end of the rotating support 2 is hinged to the upper part of the main support 1, wherein the upper lifting lug 4 is located at the upper part of the hinge between the rotating support 2 and the main support 1, and the other end of the rotating support 2 is hinged to an auxiliary hook lifting ring 5.

[0059] A tension spring 6 is provided between the rotating lug 2 and the main support 1 to pull the rotating lug 2 downward; wherein, a connecting shaft is provided between the two fixed lugs 102 on the main support 1, and a connecting shaft is also provided on the rotating lug 2, and the hooks at both ends of the tension spring 6 are respectively hooked on the corresponding connecting shaft.

[0060] The main support 1 has a through hole 101 extending vertically to the bottom. The hanging rod 3 is movably fitted in the through hole 101 in the vertical direction. The bottom end of the hanging rod 3 is provided with a lower lifting lug 7. The hanging rod 3 is located at the lower part of the hinge between the rotating support lug 2 and the main support 1.

[0061] A linkage mechanism is provided between the rotating lug 2 and the main support 1 to lock the boom 3 and prevent it from falling; after the rotating lug 2 rotates upward, the linkage mechanism can release the lock on the boom 3.

[0062] The main support 1 is provided with an anti-detachment component to prevent the hanging rod 3 from coming out of the through hole 101.

[0063] Preferably, the main support 1 is provided with two parallel fixed lugs 102, and the main support 1 between the two fixed lugs 102 is provided with a mating hole 103 that extends through to the through hole 101, and both fixed lugs 102 are provided with waist-shaped holes 104.

[0064] The linkage mechanism includes a connecting arm 8 and a positioning tenon 9;

[0065] The upper end of the connecting arm 8 is hinged to the rotating support 2. The hinge connection position between the connecting arm 8 and the rotating support 2 is located between the connection position between the tension spring 6 and the rotating support 2 and the hinge connection position between the rotating support 2 and the main support 1. The lower end of the connecting arm 8 is provided with a first pin 801, which fits in the waist-shaped hole 104.

[0066] The bottom end of the positioning tenon 9 is rotatably fitted between the two fixed lugs 102;

[0067] When the positioning tenon 9 rotates, one side of its upper part can rotate and extend into the mating hole 103 to form a positioning locking part 901. The rod 3 is provided with a rod locking part 301. When the positioning locking part 901 and the rod locking part 301 are engaged, the rod 3 is locked. When the first pin 801 is located at the lower end of the waist-shaped hole 104, it can prevent the positioning locking part 901 from coming out of the mating hole 103. After the first pin 801 moves upward along the waist-shaped hole 104, the positioning locking part 901 can rotate and disengage from the mating hole 103 to release the locking of the rod 3.

[0068] Preferably, the positioning locking part 901 is provided with a positioning mating inclined surface 902, and the rod locking part 301 is provided with a rod mating inclined surface 302;

[0069] When the hanger engagement inclined surface 302 engages downward on the positioning engagement inclined surface 902, the force transmitted from the hanger engagement inclined surface 302 to the positioning engagement inclined surface 902 generates a torque that causes the positioning tenon 9 to rotate away from the engagement hole 103.

[0070] Preferably, the positioning and mating inclined surface 902 has an inclination trend of downward from left to right, and the lifting rod mating inclined surface 302 also has an inclination trend of downward from left to right.

[0071] Preferably, the distance from the center axis of the bottom rotation shaft of the positioning tenon 9 to the bottom end of the positioning mating inclined surface 902 is l1, the distance from the center axis of the bottom rotation shaft of the positioning tenon 9 to the top end of the positioning mating inclined surface 902 is l2, and the vertical distance from the center axis of the bottom rotation shaft of the positioning tenon 9 to the positioning mating inclined surface 902 is l. <l1<l2。

[0072] This positional relationship is used to achieve the following: the force transmitted from the inclined surface 302 of the hanger to the inclined surface 902 of the positioning surface generates a torque that causes the positioning tenon 9 to rotate away from the mating hole 103. A detailed analysis follows:

[0073] The acting force F transmitted by the suspension rod to the positioning mating inclined surface 902 through the inclined surface 302 is decomposed along the direction of the line connecting the acting point and the center point of the rotation axis at the bottom end of the positioning tenon 9 and the direction perpendicular to the line connecting the acting point and the center point of the rotation axis at the bottom end of the positioning tenon 9. Based on the setting of l < l1 < l2, the component force F1 perpendicular to the line connecting the acting point and the center point of the rotation axis at the bottom end of the positioning tenon 9 is inclined upward, generating a torque that promotes the positioning tenon 9 to rotate away from the mating hole 103. When the torque generated by the component force F1 that promotes the positioning tenon 9 to rotate away from the mating hole 103 is greater than the torque generated by the self-gravity of the positioning tenon 9, the positioning tenon 9 rotates away from the mating hole 103. The magnitude of the acting force F is related to the overall gravity of the suspension rod 3 and the container suspended below the suspension rod 3. The greater the overall gravity of the suspension rod 3 and the container suspended below the suspension rod 3, the greater the acting force F. Therefore, when the first pin shaft 801 moves upward along the kidney-shaped hole 104 and no longer blocks the positioning tenon 9, and the overall gravity of the suspension rod 3 and the container suspended below the suspension rod 3 reaches a certain value, the torque generated by the component force F1 will overcome the torque generated by the self-gravity of the positioning tenon 9, realizing rotation away from the mating hole 103. The positioning locking portion 901 rotates away from the mating hole 103 to release the locking of the suspension rod 3, and then the suspension rod 3 and the container suspended at the bottom end fall.

[0074] Preferably, a limiting block 105 for limiting the outer rotation position of the positioning tenon 9 is provided between the two fixed lugs 102.

[0075] Preferably, an arc-shaped groove 907 adapted to the outer wall of the first pin shaft 801 is provided at the upper part of one end of the positioning tenon 9;

[0076] When the first pin shaft 801 is located at the lower end of the kidney-shaped hole 104 and the first pin shaft 801 is engaged in the arc-shaped groove 907, the positioning locking portion 901 extends into the mating hole 103.

[0077] Preferably, the anti-detachment member is an anti-detachment pin 10 provided at the lower end of the through hole 101; when the suspension rod 3 falls along the through hole 101, the suspension rod mating inclined surface 302 presses on the anti-detachment pin 10 to prevent the suspension rod 3 from disengaging from the through hole 101.

[0078] Specifically, in the present application, the main body bracket 1 and the through hole 101 are both of rectangular structures, the suspension rod 3 is of a rectangular rod structure, and the vertical side of the suspension rod 3 facing the positioning tenon 9 includes a first vertical side 303 at the upper part and a second vertical side 304 at the lower part, and the first vertical side 303 and the second vertical side 304 are connected by the suspension rod mating inclined surface 302.

[0079] Preferably, the connecting arm 8 includes two connecting plates 802 that are parallel in the front-rear direction. The first pin 801 is disposed between the lower parts of the two connecting plates 802, and the second pin 803 is disposed between the upper parts of the two connecting plates 802. The second pin 803 is connected to the rotating lug 2.

[0080] The two connecting plates 802 are located outside the two fixed lugs 102.

[0081] Preferably, the positioning tenon 9 includes two positioning plates 903 that are parallel in the front-back direction, and a sleeve 904 is fixedly arranged between the lower parts of the two positioning plates 903. A rotating shaft 905 is coaxially arranged inside the sleeve 904, and the two ends of the rotating shaft 905 are connected to the corresponding fixed lugs 102.

[0082] A reinforcing plate 906 is installed between the upper parts of the two positioning plates 903;

[0083] The positioning and mating inclined surface 902 is located on the positioning plate 903.

[0084] An automatic anti-fall device for container drop tests is implemented as follows:

[0085] Step 1: Connect the upper lifting lug 4 and auxiliary hook lifting ring 5 to the main and auxiliary hooks of the crane respectively using the lifting connectors, and connect the lower lifting lug 7 to the test container through the lifting ring 12 and lifting chain 11;

[0086] Step 2: Using a crane, lift the anti-fall automatic detachment device and the test container off the ground and move them to the designated position according to the test requirements. During this process, the rotating lug 2 is kept horizontal so that the first pin 801 is engaged in the arc groove 907, thereby locking the positioning tenon 9 into the lifting rod 3.

[0087] Step 3: The crane operator keeps the main hook stationary and raises the auxiliary hook, causing the auxiliary hook lifting ring 5 to pull the rotating support 2 upwards. Simultaneously, this causes the first pin 801 at the lower end of the connecting arm 8 to move upwards along the oblong hole 104 on the fixed support 102. This disengages the first pin 801 from the arc-shaped groove 907 on the positioning tenon 9. Under the overall weight of the boom 3 and the test container connected to it, the component of the force F transmitted from the boom 3 and the test container to the positioning and mating inclined surface 902 is... The torque generated by F1 overcomes the torque generated by the weight of the positioning tenon 9, causing the positioning tenon 9 to rotate away from the mating hole 103. The positioning locking part 901 disengages from the mating hole 103 to release the locking of the lifting rod 3. The lifting rod 3 and the test container connected to it fall freely until the test container falls freely to the ground, thus conducting a drop test. After the test container falls freely, the anti-detachment pin 10 will prevent the lifting rod 3 from coming out of the through hole 101, thereby suspending the lifting chain 11, lifting ring 12, and lower lifting lug 7 above the test container without falling.

[0088] Step 4: After the test is completed, the crane will lift the test container to the designated location and place it. Then, the boom 3 will be moved up to the initial position, and the positioning tenon 9 will be rotated inward to reset. Under the action of the tension spring 6, the rotating lug 2 will be restored to the horizontal state. The first pin 801 of the connecting arm 8 will move down along the waist-shaped hole 104 and re-engage in the arc-shaped groove 907 of the positioning tenon 9, thus restoring the mechanical locking of the boom 3 for the next drop test.

[0089] The lifting chain 11 involved in the implementation steps of this application is an auxiliary structure to cooperate with the automatic detachment device for preventing falls in this application. Its length-to-width ratio, size structure and other elements can be adapted to different types of test containers being lifted. It is only shown as an illustration in this utility model.

[0090] The lifting connectors involved in the implementation steps of this application are standard parts for connecting lifting devices, including shackles, double rings, lifting rings, etc. The appropriate model needs to be selected according to the type and weight of the test container. The illustrations of this invention have been simplified and are not shown in the figures, only their connection function is described in text.

[0091] The attached drawings in this application only show one method of lifting containers. For other special container types or containers with irregular corner pieces or false corner pieces, lifting test operations can be carried out at other locations on the container according to the actual situation.

[0092] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, they are not intended to limit the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the protection scope of the present utility model.

Claims

1. An automatic anti-fall device for container drop tests, characterized in that, Includes main support frame, rotating lugs, and suspension rods; The top of the main support frame is provided with a lifting lug; One end of the rotating lug is hinged to the upper part of the main support, and the other end of the rotating lug is hinged to an auxiliary hook lifting ring; A tension spring is provided between the rotating lug and the main support to pull the rotating lug downwards; The main support frame has a through hole extending vertically to the bottom, and the suspension rod is movably fitted into the through hole in the vertical direction. The bottom end of the suspension rod is provided with a lower lifting lug. A linkage mechanism is provided between the rotating lug and the main support to lock the boom and prevent it from falling; after the rotating lug rotates upward, the linkage mechanism can release the locking of the boom. The main support frame is equipped with an anti-detachment component to prevent the suspension rod from coming out of the through hole.

2. The automatic anti-fall device for container drop testing as described in claim 1, characterized in that, The main support is provided with two parallel fixed lugs, and the main support between the two fixed lugs is provided with a mating hole that extends through to the through hole. Both fixed lugs are provided with a waist-shaped hole. The linkage mechanism includes a connecting arm and a positioning tenon; The upper end of the connecting arm is hinged to the rotating support lug, and the lower end of the connecting arm is provided with a first pin, which fits into the waist-shaped hole. The bottom end of the positioning tenon is rotatably fitted between two fixed lugs; When the positioning tenon rotates, one side of its upper part can rotate and extend into the mating hole to form a positioning locking part. The rod is provided with a rod locking part. When the positioning locking part and the rod locking part are engaged, the rod is locked. When the first pin is located at the lower end of the waist-shaped hole, it can prevent the positioning locking part from coming out of the mating hole. After the first pin moves up along the waist-shaped hole, the positioning locking part can rotate and disengage from the mating hole to release the locking of the rod.

3. The automatic anti-fall device for container drop tests as described in claim 2, characterized in that, The positioning locking part is provided with a positioning mating inclined surface, and the lifting rod locking part is provided with a lifting rod mating inclined surface; When the inclined surface of the hanger is engaged downwards on the inclined surface of the positioning engagement surface, the force transmitted from the inclined surface of the hanger to the inclined surface of the positioning engagement surface generates a torque that causes the positioning tenon to rotate away from the engagement hole.

4. The automatic anti-fall device for container drop testing as described in claim 3, characterized in that, The inclined trend of the positioning and mating ramp is downward from left to right.

5. The automatic anti-fall device for container drop testing as described in claim 3, characterized in that, The distance from the center axis of the bottom rotation shaft of the positioning tenon to the bottom end of the positioning and fitting inclined surface is l1, the distance from the center axis of the bottom rotation shaft of the positioning tenon to the top end of the positioning and fitting inclined surface is l2, and the vertical distance from the center axis of the bottom rotation shaft of the positioning tenon to the positioning and fitting inclined surface is l. Then l <l1<l2。 6. The automatic anti-fall device for container drop testing as described in claim 2, characterized in that, A limiting block is provided between the two fixed lugs to limit the outward rotation position of the positioning tenon.

7. The automatic anti-fall device for container drop testing as described in claim 2, characterized in that, The upper part of one end of the positioning tenon is provided with an arc-shaped groove that can be adapted to the outer wall of the first pin. When the first pin is located at the lower end of the waist-shaped hole and the first pin is engaged in the arc-shaped groove, the positioning and locking part extends into the mating hole.

8. The automatic anti-fall device for container drop testing as described in claim 3, characterized in that, The anti-detachment component is an anti-detachment pin installed at the lower end of the through hole; when the lifting rod falls along the through hole, the lifting rod, in conjunction with the inclined surface, presses against the anti-detachment pin to prevent the lifting rod from coming out of the through hole.

9. The automatic anti-fall device for container drop testing as described in claim 2, characterized in that, The connecting arm includes two connecting plates that are parallel in the front-to-back direction. The first pin is located between the lower parts of the two connecting plates, and the second pin is located between the upper parts of the two connecting plates. The second pin is connected to the rotating lug. The two connecting plates are located outside the two fixed lugs.

10. The automatic anti-fall device for container drop testing as described in claim 3, characterized in that, The positioning tenon includes two positioning plates that are parallel in the front-back direction. A sleeve is fixedly installed between the lower parts of the two positioning plates. A rotating shaft is coaxially installed inside the sleeve. The two ends of the rotating shaft are connected to corresponding fixed lugs. A reinforcing plate is installed between the upper parts of the two positioning plates; The positioning and mating inclined surface is located on the positioning plate.

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