Automatic canning barrel stacking system

Abstract

The invention provides an automatic canning barrel stacking system which comprises a roller conveyor used for conveying canning barrels, each canning barrel comprises a barrel body, a receding groove is formed in the top of the barrel body, a handle is integrally formed in the position, located in the receding groove, of the barrel body, and a communication opening communicated with the interior of the barrel body is formed in the position, located on one side of the receding groove, of the barrel body; a barrel cover used for blocking the communicating opening is installed on the barrel body in a threaded sleeve mode. According to the invention, through the design of the extrusion detection part and the air tightness detection part, during the transferring and stacking period of the canning barrels and when the barrel bodies are lifted, the effect of detecting the weights of the canning barrels and the effect of rechecking the weight of materials are realized, and during the period, the barrel bodies are extruded through the extrusion detection part, and whether air leaks at the barrel covers is detected through the air tightness detection part; and the situation that risks occur in subsequent storage and transportation due to the fact that unqualified products with leakage hidden dangers are mixed into stacks due to incomplete sealing of the barrel cover to the communicating opening is effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of canned drum stacking, and more specifically to an automatic canned drum stacking system. Background Technology

[0002] Automated stacking and palletizing systems for canned containers are crucial back-end processing equipment in modern logistics and industrial production. They are primarily used to automatically pick up metal or plastic drums containing materials from the production line, stack them in multiple layers on pallet racks according to a predetermined pattern, and ultimately form a stable stack. For example, after electroplating additives are processed, they need to be canned in plastic drums for easy transfer. Furthermore, to further ensure stability and safety during transportation and storage, they are usually wrapped with protective film after stacking.

[0003] Currently, existing automated canister stacking systems typically consist of conveyors, transfer robots, and simple palletizing end effectors (such as robotic grippers or lifting devices). The workflow is roughly as follows: the conveyor transports canisters to a designated station, the transfer robot drives the end effector to grasp the canister, and then places it on a pallet for stacking. Some more advanced systems integrate weighing sensors to verify the weight of the material inside the canister during the grasping process. After stacking, the entire stack is usually wrapped with protective film manually or by a separate wrapping device. However, the aforementioned existing automated canister stacking systems still have the following drawbacks in practical use:

[0004] 1. While the system completes the basic cycle of "grabbing and stacking", it can verify the weight of materials. However, it cannot quickly and automatically inspect the airtightness of the lids on the production line. Unqualified products with potential leakage risks are easily mixed into the stack, leading to risks in subsequent storage and transportation.

[0005] 2. The packaging process has a low degree of automation integration, relying on manual labor or independent equipment for wrapping film operations, which interrupts the continuity of production, is inefficient, and fails to utilize the flexibility of the robotic arms themselves. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides an automated stacking and palletizing system for canned drums, which solves the problems mentioned in the background section.

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

[0008] An automated stacking and palletizing system for canned drums includes:

[0009] A roller conveyor is used to transport canned drums. The canned drums include a drum body, a relief groove on the top of the drum body, a handle integrally formed on the drum body and located in the relief groove, a communication port connected to the inside of the relief groove on one side of the drum body, and a drum cap threaded on the drum body for sealing the communication port.

[0010] A transfer robot is deployed on one side of the roller conveyor;

[0011] A lifting assembly is installed on the movable end of a transfer robot. The lifting assembly includes a rotating shaft that is rotatably installed on the movable end of the transfer robot. A connecting plate is fixedly installed on the bottom of the rotating shaft. A lifting detection component is installed on the connecting plate. A positioning component is installed on the bottom of the lifting detection component. One end of the positioning component can extend into a clearance groove and position the handle.

[0012] An extrusion detection assembly is installed at the bottom of a hoisting detection component. The extrusion detection assembly includes a fixed ring fixedly installed at the bottom of the hoisting detection component and located outside the positioning component. A rotating ring is rotatably connected to the outside of the fixed ring. A drive mechanism for driving the rotating ring to rotate is installed on the hoisting detection component. An airtightness detection component is installed at the bottom of the hoisting detection component and inside the fixed ring. Extension components are symmetrically installed on the outer side wall of the rotating ring. An installation component is installed at the movable end of the extension component. Extrusion detection components are installed on opposite sides of the two sets of installation components.

[0013] The wrapping and palletizing assembly includes a support base disposed on the side of the transfer robot away from the roller conveyor, a bracket placed on top of the support base, and an annular guide rail disposed outside the support base. A traveling wheel that moves along the annular guide rail is mounted on the annular guide rail, and a wrapping component for positioning the protective film roll is mounted on top of the traveling wheel.

[0014] When transferring canned containers:

[0015] The transfer robot arm moves to extend the bottom of the positioning component into the relief groove to position the handle, and the airtightness detection component extends to the outside of the bucket lid and the connecting opening.

[0016] The transfer robot lifts the barrel, and the hoisting and testing components detect the weight of the canned barrel.

[0017] The drive mechanism drives the rotating ring to rotate, and the extension component adjusts the displacement of the mounting component so that the two sets of extrusion detection components are located on both sides of the barrel. The two sets of extrusion detection components extrude the barrel so that the airtightness detection component can detect the airtightness at the connection between the barrel lid and the connecting port.

[0018] When stacking cans and wrapping them with protective film:

[0019] The transfer robot moves, the extension component adjusts the displacement of the installation component, one set of extrusion detection components positions the end of the protective film, the winding component unfolds the protective film, the walking wheel moves along the annular guide rail, and the moving end of the transfer robot moves in the opposite direction to the walking wheel along the annular guide rail.

[0020] Furthermore, the hoisting detection component includes a sleeve plate movably fitted outside the rotating shaft. The longitudinal section of the sleeve plate is inverted U-shaped. Both ends of the bottom of the sleeve plate movably pass through the connecting plate. A hoisting frame is fixedly connected to the bottom of the connecting plate. Spring telescopic rods that are fixedly connected to the inner top wall of the sleeve plate are symmetrically fixedly installed on the top of the connecting plate and on both sides of the rotating shaft. A weighing sensor that contacts the inner top wall of the sleeve plate is fixedly installed on the top of the connecting plate. The positioning component, the airtightness detection component, and the fixing ring are all fixedly installed at the bottom of the hoisting frame.

[0021] Furthermore, the positioning component includes a positioning block fixedly installed at the bottom of the hoisting frame, a positioning plate symmetrically slidably installed at the bottom of the positioning block, two positioning plates symmetrically arranged, and the longitudinal section of both positioning plates is L-shaped, and an electromagnetic slider for driving the positioning plate to slide is fixedly installed on the positioning block.

[0022] The drive mechanism includes a rotating shaft that is vertically mounted on the hoisting frame. A drive gear is coaxially fixed to the bottom of the rotating shaft, and a driven gear that meshes with the drive gear is coaxially fixed to the outside of the rotating ring. An electric motor for driving the rotating shaft to rotate is fixedly mounted on the hoisting frame.

[0023] Furthermore, the airtightness detection component includes a detection sleeve fixedly installed at the bottom of the hoisting frame and located inside the fixing ring. When the bottom end of the positioning component extends into the relief groove to position the handle, the detection sleeve is fitted outside the bucket lid and contacts the top of the bucket body. A pressure sensor is fixedly installed on the inner top wall of the detection sleeve.

[0024] Furthermore, the extension component includes a horizontal plate fixedly installed on the outer wall of the rotating ring. A mounting groove is provided on the side of the horizontal plate away from the rotating ring. A hinge frame is horizontally slidably installed on the horizontal plate and within the mounting groove. An electromagnetic slider II for driving the hinge frame to slide is fixedly installed on the horizontal plate. A hinge block is rotatably installed on the hinge frame. A motor I for driving the hinge block to rotate is fixedly installed on the hinge frame. A fixing plate is fixedly installed on the free end of the hinge block. A rotating shaft II is rotatably installed on the fixing plate. The mounting component is connected to one end of the rotating shaft II. A motor II for driving the rotating shaft II to rotate is fixedly installed on the fixing plate.

[0025] Furthermore, the mounting component includes a mounting shell fixedly mounted at both ends of the rotating shaft. The inner top wall of the mounting shell is symmetrically fixed with two vertical telescopic rods. The bottom of the two telescopic rods is fixedly mounted with a mounting plate. The mounting shell is equipped with a drive rod for driving the mounting plate to slide along the two telescopic rods. The extrusion detection component is mounted on the mounting shell.

[0026] Furthermore, the extrusion detection component includes a mounting block 1 mounted on a mounting shell. A horizontal telescopic rod 1 is symmetrically fixedly mounted on the mounting block 1. Mounting blocks 2 are fixedly mounted on the telescopic ends of the two telescopic rods 1. A drive rod 1 for driving mounting blocks 2 to slide along the telescopic rods 1 is fixedly mounted on the mounting block 1. A horizontal guide rod is symmetrically fixedly mounted on the side of mounting blocks 2 away from the mounting block 1. A fixing block is slidably mounted on the two guide rods along the guide rod axis. A contact spring sleeved on the outside of the guide rod is fixedly mounted between the mounting blocks 2 and the fixing blocks on opposite sides. A pressure sensor 2 in contact with the fixing block is mounted on the mounting block 2. A connector is mounted on the fixing block, and two extrusion rollers are rotatably mounted on the connector.

[0027] Furthermore, the cross-sections of the mounting shell and the mounting plate are both arc-shaped, and the ends of the two mounting shells and the two mounting plates can be fitted together;

[0028] The fixing block has an installation hole. The connector includes a connecting block that is vertically slidably installed in the installation hole. A drive rod three connected to the connecting block is fixedly installed on the top wall of the installation hole. A horizontal rotating shaft three is rotatably installed on the connecting block. A connecting frame is fixedly installed at the end of the rotating shaft three away from the mounting block two. Both extrusion rollers are rotatably installed on the connecting frame, and the outer walls of the two extrusion rollers are in contact with each other.

[0029] Furthermore, the outer walls of the two extrusion rollers are symmetrically provided with mounting planes, and rubber pads are fixedly installed on the mounting planes. One of the extrusion rollers is provided with an installation cavity located on the mounting plane, and the rubber pad is provided with a clearance hole communicating with the installation cavity. A cutting assembly is installed on the extrusion roller and located in the installation cavity, which includes a movable block that is slidably installed in the installation cavity along the axis of the extrusion roller. An electromagnetic slider three for driving the movable block to slide is fixedly installed in the installation cavity. A drive rod four is symmetrically fixedly installed on the side of the movable block near the opening end of the installation cavity. A blade holder is fixedly installed on the piston rod of the two drive rod fours, and a cutting blade that can move through the clearance hole is fixedly installed on the blade holder.

[0030] Furthermore, the top of the support base is symmetrically provided with slots, and the bottom of the bracket is symmetrically fixed with support blocks. The two support blocks can be inserted into the two slots respectively and engaged with the support base. The bracket is symmetrically provided with insertion holes on one side.

[0031] The winding component includes drive rods five symmetrically fixedly installed on the top of the walking wheels. A mounting frame is fixedly installed on the top of the two drive rods five. A positioning shaft is rotatably installed on the mounting frame. A motor two for driving the positioning shaft to rotate is fixedly installed on the mounting frame. Accommodating grooves are symmetrically opened on both sides of the positioning shaft. A guide plate is horizontally movable through the positioning shaft and located outside the accommodating groove. An abutment plate that can be hidden in the accommodating groove is fixedly installed at the end of the guide plate. Drive rods six for driving the abutment plate to slide along the guide plate are symmetrically fixedly installed in the accommodating groove.

[0032] This invention provides an automated stacking and palletizing system for canned drums. Compared with the prior art, it has the following advantages:

[0033] Beneficial effects:

[0034] 1. Through the design of the extrusion detection component and the airtightness detection component, the weight of the can is detected when the can is lifted during the transfer and stacking of cans, thus realizing the effect of material weight verification. During this process, the extrusion detection component extrudes the can and the airtightness detection component detects whether there is gas leakage at the can lid. This effectively avoids the situation where the can lid is not completely sealed to the connection port, which may lead to defective products with leakage potential being mixed into the stack, thus causing risks in subsequent storage and transportation.

[0035] 2. By coordinating the movement of the traveling wheels along the circular guide rail with the reverse movement of the transfer robot, the relative rotation of the wrapping film mechanism and the stacking drum group is achieved, thereby completing the wrapping and packaging quickly and evenly. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 A three-dimensional structural schematic diagram of the present invention is shown;

[0038] Figure 2 A schematic diagram of the mounting structure of the socket plate of the present invention is shown;

[0039] Figure 3 A schematic diagram of the mounting structure of the extension component of the present invention is shown;

[0040] Figure 4 The present invention is shown Figure 3 Enlarged view of point A in the middle;

[0041] Figure 5 The present invention is shown Figure 3 Enlarged view of point B in the middle;

[0042] Figure 6 A schematic diagram of the installation structure of the airtightness detection component of the present invention is shown;

[0043] Figure 7 A schematic diagram of the installation structure of the weighing sensor of the present invention is shown;

[0044] Figure 8 A schematic diagram of the installation structure of the extrusion detection component of the present invention is shown;

[0045] Figure 9 A schematic diagram of the mounting structure of the fixing plate of the present invention is shown;

[0046] Figure 10 A schematic diagram of the installation structure of the extrusion roller of the present invention is shown;

[0047] Figure 11 A schematic diagram of the installation structure of the cutting component of the present invention is shown;

[0048] Figure 12 A schematic diagram of the mounting structure of the winding component of the present invention is shown;

[0049] Figure 13 An exploded view of the mounting component of the present invention is shown;

[0050] Figure 14 A schematic diagram of the mounting structure of the bracket of the present invention is shown;

[0051] The diagram shows: 1. Canning drum; 11. Drum body; 12. Handle; 13. Connecting port; 14. Drum lid; 2. Transfer robot; 3. Lifting assembly; 31. Rotating shaft; 32. Connecting plate; 33. Lifting detection component; 331. Sleeve plate; 332. Lifting frame; 333. Spring telescopic rod; 334. Weighing sensor; 34. Positioning assembly; 341. Positioning block; 342. Positioning plate; 4. Extrusion detection assembly; 1. Fixed ring; 42. Rotating ring; 43. Drive mechanism; 431. Rotating shaft one; 432. Driving gear; 433. Driven gear; 44. Air tightness detection component; 441. Detection sleeve; 442. Pressure sensor one; 45. Extension component; 451. Horizontal plate; 452. Hinge frame; 453. Hinge block; 454. Fixed plate; 455. Rotating shaft two; 46. Mounting component; 461. Mounting shell; 4 62. Telescopic rod two; 463. Mounting plate; 47. Extrusion detection component; 471. Mounting block one; 472. Telescopic rod one; 473. Mounting block two; 474. Guide rod; 475. Fixing block; 476. Contact spring; 477. Connector; 4771. Connecting block; 4772. Rotating shaft three; 4773. Connecting frame; 478. Extrusion roller; 4781. Mounting plane; 4782. Rubber pad; 479. 1. Pressure sensor 2; 5. Support base; 51. Slot; 6. Bracket; 61. Support block; 62. Insertion hole; 7. Circular guide rail; 71. Traveling wheel; 72. Winding component; 721. Drive rod 5; 722. Mounting frame; 723. Positioning shaft; 724. Guide plate; 725. Contact plate; 8. Cutting assembly; 81. Moving block; 82. Drive rod 4; 83. Knife holder; 84. Cutting knife; 9. Roller conveyor. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, 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.

[0053] Example

[0054] To address the technical problems in the background section, the following is provided: an automated stacking and palletizing system for canned drums.

[0055] Combine Figures 1-14 As shown, the present invention provides an automatic stacking and palletizing system for canned drums, comprising:

[0056] Roller conveyor 9 is used to convey canned barrel 1. Canned barrel 1 includes barrel body 11. A relief groove is provided on the top of barrel body 11. A handle 12 is integrally formed on barrel body 11 and located in the relief groove. A communication port 13 is provided on barrel body 11 and located on one side of the relief groove, which communicates with the interior of the handle. A barrel cover 14 for sealing the communication port 13 is threaded on barrel body 11.

[0057] The transfer robot 2 is positioned on one side of the roller conveyor 9;

[0058] The hoisting assembly 3 is installed on the movable end of the transfer robot 2. The hoisting assembly 3 includes a rotating shaft 31 rotatably installed on the movable end of the transfer robot 2. A motor 3 for driving the rotating shaft 31 to rotate is fixedly installed on the movable end of the transfer robot 2. A connecting plate 32 is fixedly installed on the bottom of the rotating shaft 31. A hoisting detection component 33 is installed on the connecting plate 32. A positioning component 34 is installed on the bottom of the hoisting detection component 33. One end of the positioning component 34 can extend into the relief groove and position the handle 12.

[0059] The extrusion detection component 4 is installed at the bottom of the hoisting detection component 33. The extrusion detection component 4 includes a fixed ring 41 fixedly installed at the bottom of the hoisting detection component 33 and located outside the positioning component 34. A rotating ring 42 is rotatably connected to the outside of the fixed ring 41. A drive mechanism 43 for driving the rotating ring 42 to rotate is installed on the hoisting detection component 33. An airtightness detection component 44 is installed at the bottom of the hoisting detection component 33 and inside the fixed ring 41. An extension component 45 is symmetrically installed on the outer side wall of the rotating ring 42. An installation component 46 is installed at the movable end of the extension component 45. Extrusion detection components 47 are installed on the opposite sides of the two sets of installation components 46.

[0060] The wrapping and palletizing assembly includes a support base 5 disposed on the side of the transfer robot 2 away from the roller conveyor 9, a bracket 6 placed on the top of the support base 5, and an annular guide rail 7 disposed outside the support base 5. A traveling wheel 71 is mounted on the annular guide rail 7 and moves along the annular guide rail 7. A wrapping component 72 for positioning the protective film roll is mounted on the top of the traveling wheel 71.

[0061] When transferring container 1:

[0062] The transfer robot 2 moves to extend the bottom end of the positioning component 34 into the relief groove to position the handle 12, and the airtightness detection component 44 extends to the outside of the barrel lid 14 and the connecting port 13.

[0063] The transfer robot 2 moves to lift the barrel 11, and the hoisting and detection component 33 detects the weight of the filling barrel 1.

[0064] The drive mechanism 43 drives the rotating ring 42 to rotate, and the extension component 45 adjusts the displacement of the mounting component 46 so that the two sets of extrusion detection components 47 are located on both sides of the barrel 11. The two sets of extrusion detection components 47 extrude the barrel 11 so that the airtightness detection component 44 can detect the airtightness at the connection between the barrel lid 14 and the connecting port 13.

[0065] When stacking cans 1 and wrapping them with protective film:

[0066] The transfer robot 2 moves, the extension component 45 adjusts the displacement of the mounting component 46, one set of extrusion detection components 47 positions the end of the protective film, the winding component 72 unfolds the protective film, the walking wheel 71 moves along the annular guide rail 7, and the movable end of the transfer robot 2 moves in the opposite direction to the walking wheel 71 along the annular guide rail 7.

[0067] By designing the compression detection component 47 and the airtightness detection component 44, the weight of the can 1 is detected when the can body 11 is lifted during the transfer and stacking of the can 1, thus achieving the effect of verifying the weight of the material. During this process, the compression detection component 47 compresses the can body 11, and the airtightness detection component 44 detects whether there is gas leakage at the can lid 14. This effectively avoids the situation where the can lid 14 does not completely seal the connecting opening 13, resulting in defective products with leakage potential being mixed into the stack, which would lead to risks in subsequent storage and transportation. The relative rotation between the wrapping film mechanism and the stacked can group is achieved by the movement of the traveling wheels 71 along the circular guide rail 7 and the reverse movement of the transfer robot 2, thereby completing the wrapping packaging quickly and evenly.

[0068] Combine Figures 1-14 As shown, the hoisting detection component 33 includes a sleeve plate 331 movably sleeved on the outside of the rotating shaft 31. The longitudinal section of the sleeve plate 331 is inverted U-shaped. Both ends of the bottom of the sleeve plate 331 movably pass through the connecting plate 32. The bottom of the connecting plate 32 is fixedly connected to the hoisting frame 332. The top of the connecting plate 32 and located on both sides of the rotating shaft 31 are symmetrically fixedly installed with spring telescopic rods 333 that are fixedly connected to the inner top wall of the sleeve plate 331. The top of the connecting plate 32 is fixedly installed with a weighing sensor 334 that contacts the inner top wall of the sleeve plate 331. The positioning component 34, the airtightness detection component 44 and the fixing ring 41 are all fixedly installed at the bottom of the hoisting frame 332. The weighing sensor 334 is directly installed on the force path (between the sleeve plate 331 and the connecting plate 32) and can accurately measure the weight of the canister 1.

[0069] Combine Figures 1-14As shown, the positioning component 34 includes a positioning block 341 fixedly installed at the bottom of the lifting frame 332. Positioning plates 342 are symmetrically slidably installed at the bottom of the positioning block 341. The two positioning plates 342 are symmetrically arranged, and the longitudinal section of the two positioning plates 342 is L-shaped. An electromagnetic slider is fixedly installed on the positioning block 341 to drive the positioning plates 342 to slide. The two L-shaped positioning plates 342 can be inserted into the space on both sides of the handle 12 and then close together in the middle to "hook" the handle 12 from below. This gripping method is adapted to the structure of the barrel 11 and is firm and reliable.

[0070] The drive mechanism 43 includes a rotating shaft 431 that is vertically oriented and rotatably mounted on the hoisting frame 332. A drive gear 432 is coaxially fixed to the bottom of the rotating shaft 431. A driven gear 433 that meshes with the drive gear 432 is coaxially fixed to the outside of the rotating ring 42. An electric motor for driving the rotating shaft 431 to rotate is fixedly mounted on the hoisting frame 332.

[0071] Combine Figures 1-14 As shown, the airtightness testing component 44 includes a testing sleeve 441 fixedly installed at the bottom of the lifting frame 332 and located inside the fixing ring 41. When the bottom end of the positioning component 34 extends into the relief groove to position the handle 12, the testing sleeve 441 is fitted over the outside of the bucket lid 14 and contacts the top of the bucket body 11. A pressure sensor 442 is fixedly installed on the inner top wall of the testing sleeve 441. When the positioning component 34 is lowered into place, the testing sleeve 441 will be like a "hat" covering the outside of the bucket lid 14, contacting the top of the bucket to form a relatively closed chamber, covering the connection between the bucket lid 14 and the connecting port 13. When the bucket body 11 is squeezed, gas leaks from the connecting port 13 and will first enter this closed chamber, causing the internal air pressure to rise. The pressure sensor 442 can sensitively detect this change, thereby judging that the airtightness is unqualified.

[0072] Combine Figures 1-14As shown, the extension component 45 includes a horizontal plate 451 fixedly installed on the outer wall of the rotating ring 42. A mounting groove is provided on the side of the horizontal plate 451 away from the rotating ring 42. A hinge frame 452 is horizontally slidably installed on the horizontal plate 451 and within the mounting groove. An electromagnetic slider 2 for driving the hinge frame 452 to slide is fixedly installed on the horizontal plate 451. A hinge block 453 is rotatably installed on the hinge frame 452. A motor 1 for driving the hinge block 453 to rotate is fixedly installed on the hinge frame 452. The free end of the hinge block 453 is fixed... A fixed plate 454 is fixedly installed, and a second rotating shaft 455 is rotatably mounted on the fixed plate 454. The mounting component 46 is connected to one end of the second rotating shaft 455. A second motor for driving the second rotating shaft 455 to rotate is fixedly installed on the fixed plate 454. The first motor controls the rotation of the hinge block 453, and the second motor controls the rotation of the second rotating shaft 455, thereby realizing the angle adjustment of the extrusion detection component 47 in the pitch and rotation directions. This allows the pair of extrusion detection components 47 to flexibly change their posture to meet different usage requirements.

[0073] Combine Figures 1-14 As shown, the mounting component 46 includes a mounting shell 461 fixedly mounted on the end of the rotating shaft 455. The inner top wall of the mounting shell 461 is symmetrically fixed with vertical telescopic rods 462. The bottom of the two telescopic rods 462 is fixedly mounted with mounting plates 463. The mounting shell 461 is equipped with a drive rod 462 for driving the mounting plates 463 to slide along the telescopic rods 462. The compression detection component 47 is mounted on the mounting shell 461.

[0074] Combine Figures 1-14 As shown, the extrusion detection component 47 includes a mounting block 471 mounted on a mounting shell 461. A horizontal telescopic rod 472 is symmetrically fixedly mounted on the mounting block 471. Mounting blocks 473 are fixedly mounted on the telescopic ends of the two telescopic rods 472. A drive rod 471 is fixedly mounted on the mounting block 471 to drive the mounting block 473 to slide along the telescopic rod 472. A horizontal guide rod 474 is symmetrically fixedly mounted on the side of the mounting block 473 away from the mounting block 471. A fixing block 475 is slidably mounted on the two guide rods 474 along the axis of the guide rod 474. A contact spring 476, sleeved on the outside of the guide rod 474, is fixedly mounted between the mounting block 473 and the fixing block 475. A pressure sensor 479, in contact with the fixing block 475, is mounted on the mounting block 473. A connector 477 is mounted on the fixing block 475, and two extrusion rollers 478 are rotatably mounted on the connector 477.

[0075] Combine Figures 1-14As shown, the cross-sections of the mounting shell 461 and the mounting plate 463 are both arc-shaped, and the ends of the two mounting shells 461 and the two mounting plates 463 can fit together. The two arc-shaped mounting shells 461 and the mounting plates 463 can be closed to form a protective cover surrounding the barrel 11, preventing the barrel 11 from colliding with external objects during the transfer process.

[0076] The fixing block 475 has an installation hole. The connector 477 includes a connecting block 4771 that is vertically slidably installed in the installation hole. A drive rod 3 connected to the connecting block 4771 is fixedly installed on the top wall of the installation hole. A horizontal rotating shaft 3 4772 is rotatably installed on the connecting block 4771. A motor 4 for driving the rotating shaft 3 4772 to rotate is fixedly installed on the connecting block 4771. A connecting frame 4773 is fixedly installed at the end of the rotating shaft 3 4772 away from the mounting block 473. Both extrusion rollers 478 are rotatably installed on the connecting frame 4773. Two motors 5 that drive the two extrusion rollers 478 to rotate are fixedly installed on the connecting frame 4773. The outer walls of the two extrusion rollers 478 are in contact with each other.

[0077] Combine Figures 1-14 As shown, the outer side walls of the two extrusion rollers 478 are symmetrically provided with mounting planes 4781. Rubber pads 4782 are fixedly installed on the mounting planes 4781. One of the extrusion rollers 478 is provided with a mounting cavity located on the mounting plane 4781. The rubber pad 4782 is provided with a clearance hole communicating with the mounting cavity. A cutting assembly 8 is installed on the extrusion roller 478 and located in the mounting cavity. The assembly includes a moving block 81 that is slidably installed in the mounting cavity along the axial direction of the extrusion roller 478. An electromagnetic slider three for driving the moving block 81 to slide is fixedly installed in the mounting cavity. A drive rod four 82 is symmetrically fixedly installed on the side of the moving block 81 near the opening end of the mounting cavity. A knife holder 83 is fixedly installed on the piston rods of the two drive rod four 82. A cutting knife 84 that can move through the clearance hole is fixedly installed on the knife holder 83.

[0078] Combine Figures 1-14 As shown, the top of the support base 5 is symmetrically provided with slots 51, and the bottom of the bracket 6 is symmetrically fixed with support blocks 61. The two support blocks 61 can be inserted into the two slots 51 respectively and are engaged with the support base 5. The side of the bracket 6 is symmetrically provided with insertion holes 62. Through the design of the slots 51 and support blocks 61, when the bracket 6 is placed above the support base 5 to stack the cans 1, the two support blocks 61 are inserted into the two slots 51 respectively and are engaged with the support base 5, so as to achieve the positioning effect of the bracket 6. Through the design of the insertion holes 62, it is convenient for external forklifts to transfer the bracket 6.

[0079] The winding component 72 includes drive rods 721 symmetrically fixedly mounted on the top of the traveling wheel 71. Specifically, the traveling wheel 71 includes a mounting bracket, on which two wheels are rotatably mounted, each abutting against the side walls of the annular guide rail 7. A motor 6 for driving one of the wheels is fixedly mounted on the mounting bracket. Both drive rods 721 are fixedly mounted on the top of the mounting bracket. A mounting frame 722 is fixedly mounted on the top of the two drive rods 721. A positioning shaft 723 is rotatably mounted on the mounting frame 722. A motor 2 for driving the positioning shaft 723 is fixedly mounted on the mounting frame 722. Symmetrical openings are provided on both sides of the positioning shaft 723. The device has a receiving groove, and a guide plate 724 is horizontally movable through the positioning shaft 723 and located outside the receiving groove. An abutment plate 725 that can be hidden inside the receiving groove is fixedly installed at the end of the guide plate 724. A drive rod six for driving the abutment plate 725 to slide along the guide plate 724 is symmetrically fixedly installed inside the receiving groove. In use, the protective film roll is sleeved outside the positioning shaft 723, so that the two abutment plates 725 are located inside the roll of the protective film roll. By controlling the multiple drive rods six to work synchronously, the two abutment plates 725 are moved away from each other along the guide plate 724, so that the two abutment plates 725 abut against the inner wall of the roll of the protective film roll, thus positioning the protective film roll and facilitating operation.

[0080] Working principle and usage process of this invention:

[0081] When the canned drum 1 being conveyed on the roller conveyor 9 is transferred:

[0082] By controlling the movement of the transfer robot 2, the lifting frame 332 is moved to the roller conveyor 9 above the barrel 11 to be transferred and stacked, and the two positioning plates 342 of the positioning component 34 are positioned above the clearance groove. The two electromagnetic sliders move the two positioning plates 342 away from each other, and the two positioning plates 342 are respectively located on both sides of the handle 12. By controlling the movement of the transfer robot 2, the lifting frame 332 is moved vertically downward, so that the bottom of the two positioning plates 342 is inserted into the clearance groove. The horizontal end of the bottom of the two positioning plates 342 is moved to the bottom of the handle 12. The two electromagnetic sliders are controlled to move the two positioning plates 342 closer to each other. When the horizontal end of the two positioning plates 342 is in contact, the transfer robot 2 is controlled to move the lifting frame 332 upward, so that the barrel 11 can be lifted by the positioning component 34. By controlling the movement of the transfer robot 2, the barrel 1 can be transferred.

[0083] During the process, when the barrel 11 is lifted, the weight of the barrel 1 and its internal material causes the lifting frame 332 to move downward, the connecting plate 331 to slide downward along the rotating shaft 31, and the two spring telescopic rods 333 to deform under the force. The connecting plate 331 applies a downward force to the weighing sensor 334, and the weighing sensor 334 detects a change in the signal, thus achieving the effect of detecting the weight of the barrel 1 during the transfer operation, thereby achieving the effect of re-inspecting the weight of the filling material inside the barrel 1.

[0084] During the transfer of can 1:

[0085] The first motor drives the rotating shaft 431 to rotate, which in turn drives the rotating ring 42 to rotate outside the fixed ring 41 via the driving gear 432 and the driven gear 433. Then, the two motors drive the hinge block 453 to rotate on the hinge frame 452, which in turn drives the fixed plate 454 to rotate around the hinge frame 452, causing the mounting shell 461 to move below the horizontal plate 451. Then, the two motors drive the second rotating shaft 455 to rotate and engage, so that the concave surfaces of the two mounting shells 461 are located on opposite sides of the two mounting shells 461. At this time, the two hinge frames 452 slide closer to each other by the electromagnetic sliders on the two horizontal plates 451, so that the ends of the two mounting shells 461 are in contact. The two mounting plates 463 are moved downward by the drive rods inside the two mounting shells 461, so that the bottom of the two mounting plates 463 extends to the bottom of the barrel 11. Thus, the two mounting shells 461 and the two mounting plates 463 form a protective cover that is fitted on the outside of the barrel 11, thereby achieving the protective effect of the barrel 1 during the transfer of the barrel 1.

[0086] During this process, the connecting block 4771 is displaced upward within the mounting hole by the drive rod three, and the rotating shaft three 4772 is rotated by the motor four, causing the connecting frame 4773 to rotate around the rotating shaft three 4772. The two extrusion rollers 478 rotate to a horizontal position. Then, the two motors five drive the two extrusion rollers 478 to rotate and cooperate, so that the mounting plane 4781 on the two extrusion rollers 478 is located on the side closer to the connecting block 4771. The mounting block two 473 is displaced away from the mounting block one 471 along the two telescopic rods one 472 by the drive rod one, so that the sidewalls of the two extrusion rollers 478 abut against the sidewall of the barrel 11. Under the reverse force of the abutment of the two extrusion rollers 478, the fixing block 475 is displaced towards the mounting block two 473 along the two guide rods 474. The two abutment springs 476 are deformed by the force, and the fixing block 475 abuts against the pressure sensor two 479, and the pressure... When the force detection signal of sensor 479 changes, it is detected that the two extrusion rollers 478 are squeezing the barrel 11. When the barrel 11 is squeezed and deformed, the internal space of the barrel 11 becomes smaller and the internal pressure of the barrel 11 increases. If the barrel lid 14 is not completely sealed to the connecting port 13, the gas inside the barrel 11 can overflow outward through the connection between the connecting port 13 and the barrel lid 14. Since the bottom end of the positioning component 34 extends into the relief groove to position the handle 12, the detection sleeve 441 is fitted outside the barrel lid 14 and contacts the top of the barrel 11. At this time, the gas overflowing outward through the connection between the connecting port 13 and the barrel lid 14 enters the interior of the detection sleeve 441, which increases the air pressure inside the detection sleeve 441. At this time, the detection signal of pressure sensor 442 changes, thereby realizing the airtightness detection effect of the barrel lid 14 of the canned barrel 1, so as to ensure that the canned barrel 1 is completely sealed when it is subsequently stacked on the bracket 6.

[0087] Furthermore, during the transfer of can 1, after the airtightness test of can 1 is completed, the control drive rod 1 causes the mounting block 2 473 to move along the two telescopic rods 1 472 toward the mounting block 1 471, so that neither of the two extrusion rollers 478 contacts the side wall of the can 11. The control drive rod 3 causes the connecting block 4771 to slide within the mounting hole to above the deformed part of the can 11. Then, the drive rod 1 causes the mounting block 2 473 to move away from the mounting block 1 471 along the two telescopic rods 1 472, so that the side walls of both extrusion rollers 478 contact the side wall of the can 11. The pressure sensor 2 479 detects the signal. When a change occurs, the first control drive rod stops working. At this time, the third control drive rod causes the connecting block 4771 to slide downward in the mounting hole, driving the two extrusion rollers 478 to move up and down along the deformation point of the barrel 11. If the barrel 11 is not completely reset after extrusion, when the two extrusion rollers 478 move to the deformation point of the barrel 11, the two contact springs 476 return to their natural state, and the force value of the second pressure sensor 479 changes, causing the detection signal of the second pressure sensor 479 to change. At this time, it can be known that the deformation point of the barrel 11 has not been completely reset, thus achieving the effect of detecting the plasticity of the barrel 11.

[0088] In addition, during the transfer of can 1, after the plasticity test of the can body 11 is completed, the control drive rod 1 is activated so that neither of the two extrusion rollers 478 contacts the side wall of the can body 11. The motor 4 causes the rotating shaft 3 4772 to rotate, so that the two extrusion rollers 478 rotate to a vertical position. Then, the two motors 5 drive the two extrusion rollers 478 to rotate and cooperate, so that the mounting surface 4781 on the two extrusion rollers 478 is located on the side close to the can body 11. At this time, the control drive rod 1 is activated so that the two extrusion rollers 478 move closer to the can body 11, so that the rubber pads 4782 on the two extrusion rollers 478 abut against the side wall of the can body 11. The contact between the rubber pads 4782 and the can body 11 increases the friction between the extrusion rollers 478 and the can body 11, thereby achieving the auxiliary positioning effect of the can body 11 during the transfer of can 1, which is beneficial to the transfer and stacking operation of can 1.

[0089] When transferring can 1 to the top of rack 6 for stacking:

[0090] The control drive rod is activated so that neither of the two extrusion rollers 478 contacts the side wall of the barrel 11. The electromagnetic sliders on the two horizontal plates 451 cause the two hinge frames 452 to slide away from each other, so that the two hinge frames 452 are respectively moved to the ends of the two horizontal plates 451 that are far apart from each other. The control motors 1 cause the hinge block 453 to rotate on the hinge frame 452, which drives the mounting shell 461 to move above the horizontal plate 451 for stacking and clearance, so as to avoid interference between the mounting plate 463 and the barrel 11 stacked in the previous stack, which would affect the normal stacking of the canned barrel 1.

[0091] After the cans 1 on tray 6 are stacked and wrapped with protective film:

[0092] Two motors are controlled to rotate the hinge block 453 on the hinge frame 452, causing the mounting shell 461 to move below the horizontal plate 451. One motor is controlled to rotate the rotating shaft 455 180 degrees, causing the mounting shell 461 to rotate, positioning the extrusion detection component 47 on the mounting shell 461 away from the other mounting shell 461. The protective film end is manually pulled to the opposite side of the mounting plane 4781 on the two extrusion rollers 478. During this process, motor 2 rotates the positioning shaft 723 to unfold the protective film roll, and two motors 5 drive the two extrusion rollers 478 to rotate and engage, positioning the mounting plane 4781 on the two extrusion rollers 478 closer to the connecting block 4771. This allows the two extrusion rollers to pass through the protective film roll. The outer wall of the pressure roller 478 clamps and fixes the end of the protective film. Then, by controlling the movement of the traveling wheel 71 along the annular guide rail 7 and controlling the movement of the transfer robot 2, the movable end of the transfer robot 2 moves in the opposite direction to the traveling wheel 71 along the annular guide rail 7. During this period, the movement of the transfer robot 2 is controlled to position the two pressure rollers 478 above the positioning shaft 723. During the winding process, the transfer robot 2 is controlled to slowly move the two pressure rollers 478 upward and the mounting frame 722 is slowly moved downward through the two drive rods 721. This achieves the effect of bidirectional synchronous wrapping of the protective film on the outside of multiple stacked cans 1, improving the efficiency of wrapping the protective film on multiple stacked cans 1. After the protective film is wrapped, the workers use tape to stick and fix the two ends of the wrapping film respectively.

[0093] During the process, after the protective film is wrapped around multiple stacked cans 1, the workers use tape to attach and fix the ends of the film. First, the two motors 5 drive the two extrusion rollers 478 to rotate in opposite directions, so that the mounting planes 4781 on the two extrusion rollers 478 are on opposite sides of the two extrusion rollers 478. This cancels the clamping of the film ends. The workers hold the film ends in their hands for positioning, and then use tape to attach and fix the film ends. During this process, the transfer robot 2 is controlled to move the two extrusion rollers 478 onto the outside of the protective film that is close to the roll-out protective film. At this time, the two drive rods 4 82 are controlled to move the cutting blade 84 to the outside of the rubber pad 4782 to contact the protective film. Then, the moving block 81 is slid in the mounting cavity by the electromagnetic slider 3, which drives the cutting blade 84 to move and achieve the cutting effect of the protective film.

[0094] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0095] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic stacking and palletizing system for canned drums, characterized in that, include: A roller conveyor is used to transport canned drums. The canned drums include a drum body, a relief groove on the top of the drum body, a handle integrally formed on the drum body and located in the relief groove, a communication port connected to the inside of the relief groove on one side of the drum body, and a drum cap threaded on the drum body for sealing the communication port. A transfer robot is deployed on one side of the roller conveyor; A lifting assembly is installed on the movable end of a transfer robot. The lifting assembly includes a rotating shaft that is rotatably installed on the movable end of the transfer robot. A connecting plate is fixedly installed on the bottom of the rotating shaft. A lifting detection component is installed on the connecting plate. A positioning component is installed on the bottom of the lifting detection component. One end of the positioning component can extend into a clearance groove and position the handle. An extrusion detection assembly is installed at the bottom of a hoisting detection component. The extrusion detection assembly includes a fixed ring fixedly installed at the bottom of the hoisting detection component and located outside the positioning component. A rotating ring is rotatably connected to the outside of the fixed ring. A drive mechanism for driving the rotating ring to rotate is installed on the hoisting detection component. An airtightness detection component is installed at the bottom of the hoisting detection component and inside the fixed ring. Extension components are symmetrically installed on the outer side wall of the rotating ring. An installation component is installed at the movable end of the extension component. Extrusion detection components are installed on opposite sides of the two sets of installation components. The wrapping and palletizing assembly includes a support base disposed on the side of the transfer robot away from the roller conveyor, a bracket placed on top of the support base, and an annular guide rail disposed outside the support base. A traveling wheel that moves along the annular guide rail is mounted on the annular guide rail, and a wrapping component for positioning the protective film roll is mounted on top of the traveling wheel. When transferring canned containers: The transfer robot arm moves to extend the bottom of the positioning component into the relief groove to position the handle, and the airtightness detection component extends to the outside of the bucket lid and the connecting opening. The transfer robot lifts the barrel, and the hoisting and testing components detect the weight of the canned barrel. The drive mechanism drives the rotating ring to rotate, and the extension component adjusts the displacement of the mounting component so that the two sets of extrusion detection components are located on both sides of the barrel. The two sets of extrusion detection components extrude the barrel so that the airtightness detection component can detect the airtightness at the connection between the barrel lid and the connecting port. When stacking cans and wrapping them with protective film: The transfer robot moves, the extension component adjusts the displacement of the installation component, one set of extrusion detection components positions the end of the protective film, the winding component unfolds the protective film, the walking wheel moves along the annular guide rail, and the moving end of the transfer robot moves in the opposite direction to the walking wheel along the annular guide rail.

2. The automatic stacking and palletizing system for canned drums according to claim 1, characterized in that: The hoisting and testing component includes a sleeve plate movably fitted outside the rotating shaft. The longitudinal section of the sleeve plate is inverted U-shaped. Both ends of the bottom of the sleeve plate movably pass through the connecting plate. A hoisting frame is fixedly connected to the bottom of the connecting plate. Spring telescopic rods that are fixedly connected to the inner top wall of the sleeve plate are symmetrically fixedly installed on the top of the connecting plate and on both sides of the rotating shaft. A weighing sensor that contacts the inner top wall of the sleeve plate is fixedly installed on the top of the connecting plate. The positioning component, the airtightness testing component, and the fixing ring are all fixedly installed at the bottom of the hoisting frame.

3. The automatic stacking and palletizing system for canned drums according to claim 2, characterized in that: The positioning component includes a positioning block fixedly installed at the bottom of the hoisting frame, a positioning plate symmetrically slidably installed at the bottom of the positioning block, two positioning plates symmetrically arranged, and the longitudinal section of both positioning plates is L-shaped. An electromagnetic slider for driving the positioning plate to slide is fixedly installed on the positioning block. The drive mechanism includes a rotating shaft that is vertically mounted on the hoisting frame. A drive gear is coaxially fixed to the bottom of the rotating shaft, and a driven gear that meshes with the drive gear is coaxially fixed to the outside of the rotating ring. An electric motor for driving the rotating shaft to rotate is fixedly mounted on the hoisting frame.

4. The automatic stacking and palletizing system for canned drums according to claim 2, characterized in that: The airtightness detection component includes a detection sleeve fixedly installed at the bottom of the hoisting frame and located inside the fixing ring. When the bottom end of the positioning component extends into the relief groove to position the handle, the detection sleeve is fitted outside the bucket lid and contacts the top of the bucket body. A pressure sensor is fixedly installed on the inner top wall of the detection sleeve.

5. The automatic stacking and palletizing system for canned drums according to claim 1, characterized in that: The extension component includes a horizontal plate fixedly installed on the outer wall of the rotating ring. A mounting groove is provided on the side of the horizontal plate away from the rotating ring. A hinge frame is horizontally slidably installed on the horizontal plate and within the mounting groove. An electromagnetic slider II for driving the hinge frame to slide is fixedly installed on the horizontal plate. A hinge block is rotatably installed on the hinge frame. A motor I for driving the hinge block to rotate is fixedly installed on the hinge frame. A fixing plate is fixedly installed on the free end of the hinge block. A rotating shaft II is rotatably installed on the fixing plate. The mounting component is connected to one end of the rotating shaft II. A motor II for driving the rotating shaft II to rotate is fixedly installed on the fixing plate.

6. The automatic stacking and palletizing system for canned drums according to claim 1, characterized in that: The mounting components include mounting shells fixedly mounted at the two ends of the rotating shaft. Vertical telescopic rods are symmetrically fixed to the inner top wall of the mounting shells. Mounting plates are fixedly mounted at the bottom of the two telescopic rods. A drive rod is mounted on the mounting shell to drive the mounting plates to slide along the telescopic rods. A compression detection component is mounted on the mounting shell.

7. The automatic stacking and palletizing system for canned drums according to claim 6, characterized in that: The extrusion detection component includes a mounting block 1 mounted on a mounting shell. A horizontal telescopic rod 1 is symmetrically fixedly mounted on the mounting block 1. A mounting block 2 is fixedly mounted on the telescopic ends of the two telescopic rods 1. A drive rod 1 for driving the mounting block 2 to slide along the telescopic rods 1 is fixedly mounted on the mounting block 1. A horizontal guide rod is symmetrically fixedly mounted on the side of the mounting block 2 away from the mounting block 1. A fixing block is slidably mounted on the two guide rods along the axis of the guide rod. A contact spring sleeved on the outside of the guide rod is fixedly mounted between the mounting block 2 and the fixing block on the opposite side. A pressure sensor 2 in contact with the fixing block is mounted on the mounting block 2. A connector is mounted on the fixing block, and two extrusion rollers are rotatably mounted on the connector.

8. The automatic stacking and palletizing system for canned drums according to claim 7, characterized in that: The cross-sections of the mounting shell and the mounting plate are both arc-shaped, and the ends of the two mounting shells and the two mounting plates can be fitted together. The fixing block has an installation hole. The connector includes a connecting block that is vertically slidably installed in the installation hole. A drive rod three connected to the connecting block is fixedly installed on the top wall of the installation hole. A horizontal rotating shaft three is rotatably installed on the connecting block. A connecting frame is fixedly installed at the end of the rotating shaft three away from the mounting block two. Both extrusion rollers are rotatably installed on the connecting frame, and the outer walls of the two extrusion rollers are in contact with each other.

9. The automatic stacking and palletizing system for canned drums according to claim 8, characterized in that: The outer walls of the two extrusion rollers are symmetrically provided with mounting planes, and rubber pads are fixedly installed on the mounting planes. One of the extrusion rollers has an installation cavity located on the mounting plane, and the rubber pad has a clearance hole communicating with the installation cavity. A cutting assembly is installed on the extrusion roller and inside the installation cavity, which includes a movable block that is slidably installed in the installation cavity along the axis of the extrusion roller. An electromagnetic slider three for driving the movable block to slide is fixedly installed in the installation cavity. A drive rod four is symmetrically fixedly installed on the side of the movable block near the opening end of the installation cavity. A blade holder is fixedly installed on the piston rod of the two drive rod fours, and a cutting blade that can move through the clearance hole is fixedly installed on the blade holder.

10. The automatic stacking and palletizing system for canned drums according to claim 1, characterized in that: The top of the support base is symmetrically provided with slots, and the bottom of the bracket is symmetrically fixed with support blocks. The two support blocks can be inserted into the two slots respectively and engaged with the support base. The bracket is symmetrically provided with insertion holes on one side. The winding component includes drive rods five symmetrically fixedly installed on the top of the walking wheels. A mounting frame is fixedly installed on the top of the two drive rods five. A positioning shaft is rotatably installed on the mounting frame. A motor two for driving the positioning shaft to rotate is fixedly installed on the mounting frame. Accommodating grooves are symmetrically opened on both sides of the positioning shaft. A guide plate is horizontally movable through the positioning shaft and located outside the accommodating groove. An abutment plate that can be hidden in the accommodating groove is fixedly installed at the end of the guide plate. Drive rods six for driving the abutment plate to slide along the guide plate are symmetrically fixedly installed in the accommodating groove.

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