A palletizing gantry with a safety mechanism for preventing goods from falling off

Abstract

The application discloses a safety mechanism with a function of preventing goods from falling off for a stacking gantry, and relates to the technical field of stacking. The safety mechanism comprises a gantry body and a fixed plate, the fixed plate is movably arranged on the inner side of the gantry body, fixed blocks are fixed on the front and back sides of the fixed plate, clamping assemblies are arranged between the two fixed blocks, the clamping assemblies are convenient for clamping goods, a lifting assembly is arranged on the gantry body, a horizontal moving assembly is arranged on the lifting assembly, the fixed plate is arranged on the horizontal moving assembly, the goods clamped by the clamping assemblies can be moved through the horizontal moving assembly and the lifting assembly, and the purpose of transporting the goods is achieved, a bearing mechanism is arranged on the fixed plate, the bottom of the goods clamped by the clamping assemblies can be received by the bearing mechanism, the phenomenon that the goods fall off during the transportation is avoided, and the stacking operation can be stably carried out.

Description

Technical Field

[0001] This invention belongs to the field of palletizing technology, and in particular relates to a safety mechanism for palletizing gantry racks that prevents goods from falling off. Background Technology

[0002] Palletizing robots are a product of the organic combination of mechanics and computer programs. They use grippers to hold and transport objects that need to be palletized, greatly saving labor. Palletizing robots are flexible, precise, fast and efficient, providing higher production efficiency for modern production and have a wide range of applications in the palletizing industry.

[0003] Publication No. CN219822863U discloses a safety mechanism for a palletizing gantry that prevents goods from falling off. By activating a third motor, a second lead screw rotates, driving a movable clamping arm threaded to it to further clamp and move the goods under the sliding action of a third slider and a third slide groove. When clamping goods, the third motor provides a stable force, further ensuring the clamping safety of the goods by the fixed clamping arm and the movable clamping arm, thus preventing the goods from falling off during the clamping operation.

[0004] The aforementioned existing technologies still have the following drawbacks in practical implementation: The product relies solely on the movement of the movable clamping arm in coordination with the fixed clamping arm to clamp the goods. However, there is a lack of a corresponding support mechanism under the clamped goods. When the goods are heavy, they can not be caught when they slip between the movable and fixed clamping arms, and the risk of the goods falling off cannot be avoided. Therefore, the product is not effective.

[0005] To address this issue, we designed a palletizing gantry with a safety mechanism to prevent goods from falling off. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a safety mechanism for preventing goods from falling off a palletizing gantry crane, comprising a gantry crane body and a fixing plate. The fixing plate is movably disposed inside the gantry crane body. Fixing blocks are fixed to both the front and rear sides of the fixing plate. A clamping assembly is disposed between two of the fixing blocks. A lifting assembly is disposed on the gantry crane body, and a lateral movement assembly is disposed on the lifting assembly. The fixing plate is disposed on the lateral movement assembly and has a bearing mechanism. The clamping assembly includes: A first lead screw is disposed between two fixed blocks. Two movable blocks are threaded on the first lead screw. The thread directions of the central threaded holes of the two movable blocks are opposite. A connecting rod is fixed to the bottom of each movable block. A clamping plate is fixed to the end of the connecting rod away from the movable block.

[0007] Several rubber strips are provided on the side of the two clamping plates that are close to each other. A first servo motor is installed on the fixed block on the rear side. The output end of the first servo motor is connected to the rear end of the first lead screw. A support rod is provided on the upper side of the first lead screw. The support rod is fixed between the two fixed blocks. The support rod passes through the movable block, and the movable block and the support rod are slidably engaged.

[0008] The supporting mechanism includes a barrel body, which is set on top of a fixed plate. A carrier plate is fixed to the side of the clamping plate away from the rubber strip. A connecting rod passes through the carrier plate. An electric push rod is provided in front of the carrier plate. A hollow rectangular plate is fixed to the telescopic end of the electric push rod. A rectangular block is movably arranged inside the rectangular plate. A rectangular groove is opened through the inner cavity of the rectangular plate near the clamping plate. A receiving plate is fixed to the side of the rectangular block near the rectangular groove. The receiving plate is movably engaged with the rectangular groove.

[0009] A cylinder is installed on the top of the barrel. The lower side of the inner cavity of the barrel is filled with hydraulic oil. A rubber stopper is movably installed on the upper side of the inner cavity of the barrel. The rubber stopper is located above the hydraulic oil. The telescopic end of the cylinder extends into the inside of the barrel and is fixedly connected to the top of the rubber stopper. A connecting pipe is embedded in the fixing block. One end of the connecting pipe is connected to the barrel. A telescopic hose is connected between the lower end of the connecting pipe and the inner cavity of the rectangular plate.

[0010] The inner wall of the barrel has two guide pulley sets fixed to each other. A connecting rope is installed inside the connecting pipe. One end of the connecting rope passes through the adjacent guide pulley set and is fixedly connected to the bottom of the rubber stopper. The lower end of the connecting rope passes through the inner cavity of the telescopic hose and is fixedly connected to the rectangular block.

[0011] The lifting assembly includes a second lead screw, two second lead screws are arranged opposite each other on the gantry frame body, a lifting block is threaded on the second lead screw, a transmission assembly is arranged between the upper sides of the outer walls of the two second lead screws, and a second servo motor is mounted on one side of the top of the gantry frame body through a mounting bracket, and the output end of the second servo motor is connected to the upper end of the second lead screw on the left side.

[0012] The transmission assembly includes pulleys and a transmission belt. Two pulleys are arranged opposite to each other on two second lead screws. The transmission belt is driven between the two pulleys. A vertical rod is provided on one side of the second lead screw. The vertical rod is fixed to the gantry frame body and passes through the lifting block. The lifting block and the vertical rod are slidably engaged.

[0013] The transverse component includes two longitudinal plates, two of which are fixed to one side of two lifting blocks that are close to each other. Two transverse plates are fixed between the two longitudinal plates, and a third lead screw is provided between the two transverse plates. The third lead screw is rotatably disposed between the two longitudinal plates, and the fixing plate is threaded onto the third lead screw.

[0014] A third servo motor is mounted on the lifting block on the left side via a bracket. The output end of the third servo motor is connected to the left end of the third lead screw. A strip groove runs through the horizontal plate, and the fixing plate is movably engaged with the two strip grooves.

[0015] A crossbar is fixed inside the strip groove. The crossbar passes through the fixing plate, and the fixing plate and the crossbar are slidably engaged. Two bases are fixed at the bottom of the gantry frame body. The present invention has the following beneficial effects: The present invention facilitates the adjustment of the two movable blocks to move closer together through the threaded engagement of the movable blocks and the first lead screw. Under the action of the connecting rod, the two clamping plates are then moved closer together to achieve the purpose of clamping the goods. Combined with the transverse component and the lifting component, the clamped goods are moved to achieve the purpose of transporting the goods. The rectangular plate is moved downwards by an electric push rod until it reaches the underside of the clamped goods. At this point, the cylinder is activated, pushing the rubber plug downwards along the inner cavity of the barrel. This forces hydraulic oil from inside the barrel through the connecting pipe and telescopic hose into the inner cavity of the rectangular plate. Simultaneously, the connecting rope is released. As more hydraulic oil enters the inner cavity of the rectangular plate, it pushes the rectangular block towards the rectangular groove, thus pushing the support plate outwards. This allows the outward-extending support plate to move to the bottom of the clamped goods, providing support and catching the bottom of the goods. This prevents the goods from slipping between the two clamping plates during handling, ensuring the stability of the goods clamping and handling process. This solves the problem of existing technologies that rely solely on the movement of the movable clamping arm and the cooperation of the fixed clamping arm to clamp the goods. However, these technologies lack a corresponding support mechanism under the clamped goods. When the goods are heavy, they cannot be caught when they slip between the movable and fixed clamping arms, still failing to prevent the risk of goods falling off, resulting in poor performance.

[0016] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments 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.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is the front view of the present invention; Figure 3 for Figure 2 Schematic diagram of the structure of the mid-section AA; Figure 4 for Figure 1 Enlarged structural diagram at point B; Figure 5 for Figure 3 Enlarged structural diagram at point C; Figure 6 for Figure 3 Enlarged structural diagram at point D; Figure 7 for Figure 3 Enlarged structural diagram at point E; Figure 8 for Figure 1 A structural diagram from another perspective; Figure 9 This is a schematic diagram of the structure in which the clamping component and the bearing mechanism are assembled together in this invention; Figure 10 for Figure 9 A structural diagram from another perspective.

[0019] The attached diagram lists the components represented by each number as follows: 1. Gantry frame body; 2. Fixing plate; 3. Fixing block; 4. First lead screw; 5. Movable block; 6. Connecting rod; 7. Clamping plate; 8. Rubber strip; 9. First servo motor; 10. Support rod; 11. Barrel body; 12. Carrier plate; 13. Electric push rod; 14. Rectangular plate; 15. Support plate; 16. Rectangular block; 17. Cylinder; 18. Rubber plug; 19. Connecting pipe; 20. Telescopic hose; 21. Connecting rope; 22. Guide pulley block; 23. Second lead screw; 24. Lifting block; 25. Transmission assembly; 26. Vertical rod; 27. Second servo motor; 28. Longitudinal plate; 29. ​​Horizontal plate; 30. Third lead screw; 31. Strip groove; 32. Horizontal rod; 33. Third servo motor; 34. Base. Detailed Implementation

[0020] 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.

[0021] In the description of this invention, it should be understood that the terms "upper," "middle," "outer," "inner," etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0022] Please see Figures 1-10 As shown, this invention relates to a safety mechanism for preventing goods from falling off a palletizing gantry crane. It includes a gantry crane body 1 and a fixing plate 2. The fixing plate 2 is movably disposed inside the gantry crane body 1. Fixing blocks 3 are fixed to both the front and rear sides of the fixing plate 2. A clamping assembly is disposed between the two fixing blocks 3. A lifting assembly is disposed on the gantry crane body 1, and a lateral movement assembly is disposed on the lifting assembly. The fixing plate 2 is disposed on the lateral movement assembly and has a bearing mechanism. The clamping assembly includes: The first lead screw 4 is positioned between two fixed blocks 3. Two movable blocks 5 are threaded on the first lead screw 4. The thread directions of the central threaded holes of the two movable blocks 5 are opposite. A connecting rod 6 is fixed to the bottom of the movable block 5. A clamping plate 7 is fixed to the end of the connecting rod 6 away from the movable block 5.

[0023] In the above structure, the threaded engagement between the movable block 5 and the first lead screw 4 facilitates the adjustment of the two movable blocks 5 to move closer to each other. Under the action of the connecting rod 6, the two clamping plates 7 are driven to move closer to each other, thereby achieving the purpose of clamping the goods. Combined with the lateral movement component and the lifting component, the clamped goods are moved to achieve the purpose of transporting the goods. Under the action of the bearing mechanism, the bottom of the clamped goods is supported, effectively preventing the goods from slipping between the two clamping plates 7 and causing the goods to fall off, thus ensuring the stability of the goods transport process.

[0024] Several rubber strips 8 are provided on the side of the two clamping plates 7 that are close to each other. The rubber strips 8 increase the friction between the clamping plates 7 and the goods, thereby ensuring the stability of the clamping plates 7 in holding the goods. A first servo motor 9 is installed on the fixed block 3 on the rear side. The output end of the first servo motor 9 is connected to the rear end of the first lead screw 4. A support rod 10 is provided on the upper side of the first lead screw 4. The support rod 10 is fixed between the two fixed blocks 3. The support rod 10 passes through the movable block 5, and the movable block 5 slides with the support rod 10. The support rod 10 effectively supports, guides and limits the movable block 5, ensuring the stability of the two movable blocks 5 when they move closer or further apart.

[0025] The supporting mechanism includes a barrel 11, which is set on the top of the fixed plate 2. A carrier plate 12 is fixed on the side of the clamping plate 7 away from the rubber strip 8. A connecting rod 6 passes through the carrier plate 12. An electric push rod 13 is provided on the front of the carrier plate 12. A hollow rectangular plate 14 is fixed to the telescopic end of the electric push rod 13. A rectangular block 16 is movably arranged inside the rectangular plate 14. A rectangular groove is opened through the inner cavity of the rectangular plate 14 near the clamping plate 7. A receiving plate 15 is fixed on the side of the rectangular block 16 near the rectangular groove. The receiving plate 15 is movably engaged with the rectangular groove.

[0026] A cylinder 17 is installed on the top of the barrel 11. The lower side of the inner cavity of the barrel 11 is filled with hydraulic oil. A rubber plug 18 is movably installed on the upper side of the inner cavity of the barrel 11. The rubber plug 18 is located above the hydraulic oil. The telescopic end of the cylinder 17 extends into the interior of the barrel 11 and is fixedly connected to the top of the rubber plug 18. A connecting pipe 19 is embedded in the fixing block 3. One end of the connecting pipe 19 is connected to the barrel 11. A telescopic hose 20 is connected between the lower end of the connecting pipe 19 and the inner cavity of the rectangular plate 14. Two guide pulley groups 22 are fixedly fixed to the inner wall of the barrel 11. A connecting rope 21 is installed inside the connecting pipe 19. One end of the connecting rope 21 passes through the adjacent guide pulley group 22 and is fixedly connected to the bottom of the rubber plug 18. The lower end of the connecting rope 21 passes through the inner cavity of the telescopic hose 20 and is fixedly connected to the rectangular block 16.

[0027] In the above structure, the rectangular plate 14 is moved downward by the electric push rod 13 until it moves to the bottom of the clamped goods. At this time, the cylinder 17 is activated, which pushes the rubber plug 18 downward along the inner cavity of the barrel 11. The hydraulic oil inside the barrel 11 is squeezed into the inner cavity of the rectangular plate 14 through the connecting pipe 19 and the telescopic hose 20. At the same time, the connecting rope 21 is released. As the amount of hydraulic oil entering the inner cavity of the rectangular plate 14 gradually increases, the rectangular block 16 is squeezed towards the rectangular groove, which in turn pushes the receiving plate 15 outward. The outwardly extended receiving plate 15 moves to the bottom of the clamped goods, providing support and support for the bottom of the clamped goods. This prevents the goods from slipping between the two clamping plates 7 during the handling process, ensuring the stability of the goods clamping and handling process.

[0028] The lifting assembly includes a second lead screw 23, two second lead screws 23 are arranged opposite to each other on the gantry frame body 1, a lifting block 24 is threaded on the second lead screw 23, a transmission assembly 25 is arranged between the upper sides of the outer walls of the two second lead screws 23, a second servo motor 27 is mounted on one side of the top of the gantry frame body 1 through a mounting bracket, and the output end of the second servo motor 27 is connected to the upper end of the second lead screw 23 on the left side.

[0029] The transmission assembly 25 includes pulleys and a transmission belt. The two pulleys are arranged opposite to each other on the two second lead screws 23. The transmission belt is driven between the two pulleys. A vertical rod 26 is provided on one side of the second lead screw 23. The vertical rod 26 is fixed on the gantry frame body 1 and passes through the lifting block 24. The lifting block 24 and the vertical rod 26 are slidably engaged. The vertical rod 26 effectively limits and guides the lifting block 24, ensuring the stability of the lifting block 24 during its up and down movement.

[0030] The transverse component includes two longitudinal plates 28, which are fixed on the sides of two lifting blocks 24 that are close to each other. Two transverse plates 29 are fixed between the two longitudinal plates 28. A third lead screw 30 is provided between the two transverse plates 29. The third lead screw 30 is rotatably disposed between the two longitudinal plates 28. A fixing plate 2 is threaded onto the third lead screw 30. A third servo motor 33 is mounted on the lifting block 24 on the left side via a bracket. The output end of the third servo motor 33 is connected to the left end of the third lead screw 30. A strip groove 31 runs through the transverse plate 29. The fixing plate 2 is movably engaged with the two strip grooves 31.

[0031] A crossbar 32 is fixed inside the strip groove 31. The crossbar 32 passes through the fixed plate 2 and the fixed plate 2 slides with the crossbar 32. The crossbar 32 effectively supports, limits and guides the fixed plate 2, ensuring the stability of the fixed plate 2 during the lateral movement. Two bases 34 are fixed at the bottom of the gantry frame body 1, which ensure the stability of the bottom of the gantry frame body 1.

[0032] Example: When palletizing and handling goods, the second servo motor 27 and the third servo motor 33 are started first. The third servo motor 33 drives the third lead screw 30 to rotate. With the threaded engagement between the fixed plate 2 and the third lead screw 30, and the sliding engagement between the fixed plate 2 and the crossbar 32, the fixed plate 2 is moved stably in the horizontal direction. Under the action of the fixed block 3, in conjunction with the first lead screw 4, the movable block 5 and the connecting rod 6, the clamping plate 7 is moved synchronously in the horizontal direction. Simultaneously, the second servo motor 27 drives the second lead screw 23 on the left to rotate. Under the action of the transmission component 25, the second lead screw 23 on the right rotates synchronously. With the threaded engagement between the lifting block 24 and the second lead screw 23, and the sliding engagement between the lifting block 24 and the vertical rod 26, the two lifting blocks 24 move up and down synchronously and stably. With the mutual cooperation of the vertical plate 28, the horizontal plate 29 and the third lead screw 30, the fixed plate 2 moves synchronously in the vertical direction, which in turn drives the clamping plate 7 to move up and down synchronously until the clamping plate 7 reaches the appropriate height. Then, the second servo motor 27 and the third servo motor 33 are turned off, and the first servo motor 9 is started. The first servo motor 9 drives the first lead screw 4 to rotate. With the threaded engagement between the movable block 5 and the first lead screw 4, and the sliding engagement between the movable block 5 and the support rod 10, the two movable blocks 5 are adjusted to stably approach each other. Under the action of the connecting rod 6, the two clamping plates 7 are driven to move synchronously towards the goods until the clamping plates 7 clamp the two sides of the goods. Combined with the rubber strip 8, the friction between the clamping plates 7 and the outer surface of the goods is increased, so as to achieve the purpose of stably clamping the goods. At this time, the second servo motor 27 is started again. With the cooperation of the second lead screw 23 and the lifting block 24, and the cooperation of the vertical plate 28, the horizontal plate 29, the third lead screw 30 and the fixed plate 2, the clamped goods are adjusted to move upward to a suitable height, so that the bottom of the clamped goods is suspended in the air. Then, the electric push rod 13 is activated, which pushes the rectangular plate 14 downward until it reaches the underside of the clamped goods. At this point, the cylinder 17 is activated, which pushes the rubber plug 18 downward along the inner cavity of the barrel 11, squeezing the hydraulic oil inside the barrel 11 into the inner cavity of the rectangular plate 14 through the connecting pipe 19 and the telescopic hose 20. At the same time, the connecting rope 21 is released. As more hydraulic oil enters the inner cavity of the rectangular plate 14, it squeezes the rectangular block 16 towards the rectangular groove, thereby pushing the receiving plate 15 outward. The mechanism moves to the bottom of the clamped goods, providing support and catching to prevent the goods from slipping between the two clamping plates 7 during handling. This ensures the stability of the goods clamping and handling process and solves the problem of existing technologies that rely solely on the movement of the movable clamping arm and its cooperation with the fixed clamping arm to clamp the goods. However, these technologies lack a corresponding support mechanism on the underside of the clamped goods. When the goods are heavy, they cannot be caught when they slip between the movable and fixed clamping arms, and the risk of goods falling off cannot be avoided, resulting in poor performance. Secondly, with the combined action of the lifting and traversing components, the clamped goods are moved to achieve the purpose of goods handling. After the goods are in place, the drive cylinder 17 contracts, causing the rubber plug 18 to move upward along the inner cavity of the barrel 11, and pulling the connecting rope 21 to move synchronously. A negative pressure condition is formed in the inner cavity of the barrel 11, causing the hydraulic oil in the inner cavity of the rectangular plate 14 to be drawn back into the barrel 11. Under the suction of the hydraulic oil, combined with the connecting rope 21, the rectangular block 16 is pulled to move away from the rectangular groove, thereby driving the receiving plate 15 to move into the inner cavity of the rectangular plate 14, away from the bottom of the goods, removing the supporting effect on the bottom of the goods, and placing the goods in a suitable position, thus completing the handling of the goods.

[0033] It should be further noted that the installation structure, connection method or setting method of each component in this invention are all common mechanical methods. As long as they can achieve their beneficial effects, they can be implemented. At the same time, the first servo motor 9, electric push rod 13, cylinder 17, second servo motor 27 and third servo motor 33 in this invention are all purchased from the market. Those skilled in the art can install and use them according to the requirements.

[0034] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A safety mechanism for preventing goods from falling off a palletizing gantry, comprising a gantry body (1) and a fixing plate (2), characterized in that, The fixing plate (2) is movably disposed inside the gantry frame body (1). Fixing blocks (3) are fixed on both the front and rear sides of the fixing plate (2). A clamping assembly is disposed between the two fixing blocks (3). A lifting assembly is disposed on the gantry frame body (1). A transverse moving assembly is disposed on the lifting assembly. The fixing plate (2) is disposed on the transverse moving assembly. A bearing mechanism is disposed on the fixing plate (2). The clamping assembly includes: The first lead screw (4) is set between two fixed blocks (3). Two movable blocks (5) are threaded on the first lead screw (4). The thread directions of the central threaded holes of the two movable blocks (5) are opposite. A connecting rod (6) is fixed at the bottom of the movable block (5). A clamping plate (7) is fixed at the end of the connecting rod (6) away from the movable block (5).

2. The safety mechanism for preventing goods from falling off a palletizing gantry according to claim 1, characterized in that, Several rubber strips (8) are provided on the side of the two clamping plates (7) that are close to each other. A first servo motor (9) is installed on the fixed block (3) on the rear side. The output end of the first servo motor (9) is connected to the rear end of the first lead screw (4). A support rod (10) is provided on the upper side of the first lead screw (4). The support rod (10) is fixed between the two fixed blocks (3). The support rod (10) passes through the movable block (5), and the movable block (5) and the support rod (10) are in sliding cooperation.

3. A safety mechanism for preventing goods from falling off a palletizing gantry according to claim 2, characterized in that, The bearing mechanism includes a barrel (11), which is set on the top of the fixed plate (2). A carrier plate (12) is fixed on the side of the clamping plate (7) away from the rubber strip (8). The connecting rod (6) passes through the carrier plate (12). An electric push rod (13) is provided on the front of the carrier plate (12). A hollow rectangular plate (14) is fixed at the telescopic end of the electric push rod (13). A rectangular block (16) is movably arranged inside the rectangular plate (14). A rectangular groove is opened through the inner cavity of the rectangular plate (14) on the side near the clamping plate (7). A receiving plate (15) is fixed on the side of the rectangular block (16) near the rectangular groove. The receiving plate (15) is movably engaged with the rectangular groove.

4. A safety mechanism for preventing goods from falling off a palletizing gantry according to claim 3, characterized in that, A cylinder (17) is installed on the top of the barrel (11). The lower side of the inner cavity of the barrel (11) is filled with hydraulic oil. A rubber plug (18) is movably arranged on the upper side of the inner cavity of the barrel (11). The rubber plug (18) is located on the upper side of the hydraulic oil. The telescopic end of the cylinder (17) extends into the interior of the barrel (11) and is fixedly connected to the top of the rubber plug (18). A connecting pipe (19) is embedded on the fixing block (3). One end of the connecting pipe (19) is connected to the barrel (11). A telescopic hose (20) is connected between the lower end of the connecting pipe (19) and the inner cavity of the rectangular plate (14).

5. A safety mechanism for preventing goods from falling off a palletizing gantry according to claim 4, characterized in that, The inner wall of the barrel (11) has two guide pulley groups (22) fixed to each other. The connecting pipe (19) is provided with a connecting rope (21). One end of the connecting rope (21) passes through the adjacent guide pulley group (22) and is fixedly connected to the bottom of the rubber plug (18). The lower end of the connecting rope (21) passes through the inner cavity of the telescopic hose (20) and is fixedly connected to the rectangular block (16).

6. A safety mechanism for preventing goods from falling off a palletizing gantry according to claim 5, characterized in that, The lifting assembly includes a second lead screw (23), two second lead screws (23) are arranged opposite to each other on the gantry frame body (1), a lifting block (24) is threaded on the second lead screw (23), a transmission assembly (25) is arranged between the upper sides of the outer walls of the two second lead screws (23), a second servo motor (27) is mounted on one side of the top of the gantry frame body (1) through a mounting bracket, and the output end of the second servo motor (27) is connected to the upper end of the second lead screw (23) on the left side.

7. A safety mechanism for preventing goods from falling off a palletizing gantry according to claim 6, characterized in that, The transmission assembly (25) includes pulleys and a transmission belt. The two pulleys are arranged opposite to each other on the two second lead screws (23). The transmission belt is driven between the two pulleys. A vertical rod (26) is provided on one side of the second lead screw (23). The vertical rod (26) is fixed on the gantry frame body (1) and the vertical rod (26) passes through the lifting block (24). The lifting block (24) and the vertical rod (26) are in sliding cooperation.

8. A safety mechanism for preventing goods from falling off a palletizing gantry according to claim 7, characterized in that, The transverse component includes a longitudinal plate (28), two longitudinal plates (28) are respectively fixed on one side of two lifting blocks (24) that are close to each other, two transverse plates (29) are fixed between the two longitudinal plates (28), a third lead screw (30) is provided between the two transverse plates (29), the third lead screw (30) is rotatably disposed between the two longitudinal plates (28), and the fixing plate (2) is threaded on the third lead screw (30).

9. A safety mechanism for preventing goods from falling off a palletizing gantry according to claim 8, characterized in that, A third servo motor (33) is mounted on the lifting block (24) on the left side via a bracket. The output end of the third servo motor (33) is connected to the left end of the third lead screw (30). A strip groove (31) runs through the horizontal plate (29). The fixed plate (2) is in movable cooperation with the two strip grooves (31).

10. A safety mechanism for preventing goods from falling off a palletizing gantry according to claim 9, characterized in that, A crossbar (32) is fixed inside the strip groove (31). The crossbar (32) passes through the fixing plate (2), and the fixing plate (2) and the crossbar (32) are slidably engaged. The bottom of the gantry frame body (1) has two bases (34) fixed relative to each other.

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