Automatic number plate box filling machine

Abstract

The invention relates to the technical field of motor vehicle license plate box filling machines, and discloses an automatic license plate box filling machine which comprises a license plate conveying belt, an automatic lining paper conveying and cutting assembly for conveying and cutting lining paper, a movable lining paper clamping jaw and a license plate clamping manipulator assembly. The carton clamping jaw mechanism places a carton in a carton placing area, after lining paper cached by the cache bin assembly passes through the paper feeding compression roller set, the movable lining paper clamping jaw moves to clamp the lining paper, the paper feeding compression roller set and the movable lining paper clamping jaw operate at the same time, the lining paper is pulled to a preset position, and endorsed number plates are conveyed to a number plate limiting position by the number plate conveying belt. The number plate clamping jaw mechanism clamps a number plate and lining paper above the number plate, the movable lining paper clamping jaw loosens the lining paper and moves to be separated from the lining paper, the paper cutting mechanism cuts off the lining paper, and the number plate clamping jaw mechanism puts the number plate and the lining paper into a carton. The situation that paper is not delivered in place is avoided, and the automation degree of the automatic number plate box filling machine is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motor vehicle license plate packing machines, and particularly to an automatic license plate packing machine. Background Art

[0002] When motor vehicle license plates are produced, information needs to be endorsed for the management of license plates. The endorsed license plates are collected in boxes for storage or transportation in boxes. A layer of separator paper (lining paper) needs to be placed between two adjacent license plates to prevent the two adjacent license plates from sticking together when stacked.

[0003] The existing license plate packing machine has an unstable paper feeding function. The paper roll is pulled by the paper feeding pressure roller group, and the paper roll makes passive paper feeding. The paper feeding speed is slow, and it is easy to have the phenomenon of incomplete paper feeding. In addition, the separator paper between the paper feeding pressure roller group and the paper roll is easy to deform, wrinkle and squeeze the paper, resulting in failures.

[0004] In addition, the cardboard box cannot be automatically placed in the predetermined position. Each time of packing, the cardboard box needs to be placed manually in advance. And after the license plates are packed, it cannot be docked with an automatic box receiving device (such as an AGV cart, a conveyor belt, etc.). The full box filled with license plates needs to be carried manually. This makes the efficiency low, occupies a lot of labor, and has a low degree of automation. Summary of the Invention

[0005] Aiming at the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide an automatic license plate packing machine, which avoids incomplete paper feeding, and does not require manual placement of empty cardboard boxes in advance. After the license plates are packed, it can be docked with an automatic box receiving device to avoid manual handling and improve the degree of automation of the automatic license plate packing machine.

[0006] To solve the above technical problems, the present invention adopts the following technical solutions: An automatic license plate packing machine includes a frame, on which a license plate conveyor belt for conveying license plates, an automatic separator paper conveying and cutting assembly for conveying and cutting separator paper, a movable separator paper gripper and a license plate gripping manipulator assembly are installed. The movable separator paper gripper is located above the license plate conveyor belt. A linear guide rail assembly is arranged between the movable separator paper gripper and the frame. The extending direction of the linear guide rail assembly is parallel to the conveying direction of the license plate conveyor belt. The automatic conveying and cutting assembly of the backing paper includes a main body plate, on which an air shaft for placing a paper roll, a paper feeding pressure roller group for feeding paper, and a paper cutting mechanism for cutting paper are installed. A backing paper buffer bin assembly is arranged below the air shaft. The backing paper buffer bin assembly includes a buffer bin, a guiding roller, and a gravity pressing roller. The guiding roller is installed in the buffer bin. A vertical guiding member is arranged on the bin wall of the buffer bin. The gravity pressing roller is slidably connected to the buffer bin through the vertical guiding member. A proximity switch is fixed at the bottom of the buffer bin. When the gravity pressing roller slides to the lower end along the vertical guiding member, the proximity switch acts, and thus the air shaft stops rotating and unwinding the paper. The license plate clamping manipulator assembly includes a carton clamping jaw mechanism for clamping a carton and a license plate clamping jaw mechanism for clamping a license plate and the backing paper. After the carton clamping jaw mechanism clamps the carton, it places the carton in the carton placement area. The backing paper cached in the buffer bin is sent out a certain distance by the paper feeding pressure roller group. The movable backing paper clamping jaw moves close to the paper feeding pressure roller group to clamp the backing paper. The paper feeding pressure roller group and the movable backing paper clamping jaw run simultaneously to pull the backing paper to a predetermined position and wait. When the license plate after endorsement is conveyed to the license plate limit position by the license plate conveyor belt, the license plate clamping jaw mechanism moves and clamps the license plate and the backing paper above it. Subsequently, the movable backing paper clamping jaw releases the backing paper and runs outwards to disengage from the backing paper. The paper cutting mechanism cuts the backing paper. The license plate clamping jaw mechanism puts the clamped license plate and the backing paper into the carton in the carton placement area.

[0007] Preferably: The movable backing paper clamping jaw is installed on a clamping jaw support. The movable backing paper clamping jaw includes a clamping jaw power device, an upper clamping plate, and a lower clamping plate. The clamping jaw power device drives the upper clamping plate to approach or move away from the lower clamping plate to clamp or release the backing paper. The linear guide rail assembly includes a guide rail and a slider. The slider can move along the guide rail. The guide rail is fixed on the machine frame. The guide rail is arranged parallel to the license plate conveyor belt. The clamping jaw support is fixedly connected to the slider.

[0008] Preferably, an empty carton rectifying mechanism and a full carton pushing mechanism are provided at the carton placing area. The empty carton rectifying mechanism includes a carton placing bottom plate fixed to the frame, a side plate perpendicular to and fixed to the carton placing bottom plate, a movable rectifying plate, a liftable rectifying plate, and a movable rectifying arm. The movable rectifying plate faces the side plate. The carton placing bottom plate is provided with a rectifying plate avoidance hole for the liftable rectifying plate to pass through. A first power device drives the liftable rectifying plate to extend out of or retract into the carton placing bottom plate. The liftable rectifying plate and the movable rectifying arm are opposite in position. A second power device drives the movable rectifying plate to approach or move away from the side plate. A third power device drives the movable rectifying arm to approach or move away from the liftable rectifying plate; The full carton pushing mechanism includes a pushing plate and a carton pushing power device. The pushing plate is provided with a rectifying arm avoidance hole for the movable rectifying arm to pass through. The carton pushing power device pushes the pushing plate to extend or retract.

[0009] Preferably, the vertical guiding member is a vertical long guiding hole opened on two opposite bin walls of the buffer bin. The paper feeding pressure roller group includes a first rubber pressure roller and a second rubber pressure roller. An inclined protrusion is provided in the middle of the second rubber pressure roller. An inclined depression adapted to the inclined protrusion is provided in the middle of the first rubber pressure roller. When the first rubber pressure roller abuts against the second rubber pressure roller, the inclined protrusion and the inclined depression cooperate to press out a vertical anti - curling groove in the middle of the passing liner paper to prevent the liner paper from curling.

[0010] Preferably, the first rubber pressure roller is slidably connected to the main body plate. The second rubber pressure roller is rotatably installed on the main body plate. A first power device pushes the first rubber pressure roller to abut against the second rubber pressure roller. A second power device drives the second rubber pressure roller to rotate.

[0011] Preferably, the paper cutting mechanism is located below the air - expandable shaft and above the buffer bin. The paper cutting mechanism includes a fixed cutter and a movable cutter. One end of the movable cutter is hinged to the fixed cutter. The other end of the movable cutter is connected to a cutting cylinder. The cutting cylinder drives the movable cutter to open and close relative to the fixed cutter for shearing. An auxiliary cutting assembly is provided on the main body plate. During shearing, the auxiliary cutting assembly pulls the movable cutter to abut against the fixed cutter. The direction in which the auxiliary cutting assembly pulls the movable cutter is perpendicular to the direction in which the cutting cylinder drives the movable cutter.

[0012] Preferably, the cutting cylinder includes a cylinder rod. The other end of the movable cutter is connected to the cylinder rod through a floating joint. It is assumed that the backing paper is conveyed from upstream to downstream, the fixed cutting knife and the movable cutting knife are located downstream of the paper feeding pressure roller group, and the movable cutting knife is located downstream of the fixed cutting knife. The auxiliary cutting assembly includes a fixed pin, a spring and a spring connecting plate. The spring connecting plate is connected to the cylinder rod. The fixed pin is fixed on the main body plate. The two ends of the spring are respectively connected to the fixed pin and the cylinder rod. The pulling direction of the spring is perpendicular to the extending direction of the cylinder rod. The spring pulls the movable cutting knife against the fixed cutting knife in the upstream direction.

[0013] Preferably, the license plate gripping manipulator assembly includes a mounting substrate. The carton gripping mechanism and the license plate gripping mechanism are mounted on the mounting substrate. The carton gripping mechanism includes a carton gripping driving device and two oppositely arranged carton grippers. The carton gripping driving device drives the two carton grippers to move relatively to clamp the carton. The license plate gripping mechanism includes a license plate gripping driving device, two oppositely arranged license plate grippers and a linear guide rail assembly. The linear guide rail assembly is arranged between the license plate gripper and the mounting substrate. The license plate gripping driving device drives the two license plate grippers to move relatively along the linear guide rail assembly to clamp the license plate. A backing paper pressing device is fixed on the inner side of the license plate gripper. The two carton grippers are located between the two license plate grippers.

[0014] Preferably, the carton gripping driving device includes two cylinders, which are a first cylinder and a second cylinder respectively. The two carton grippers are a first carton gripper and a second carton gripper respectively. The first cylinder drives the first carton gripper, and the second cylinder drives the second carton gripper. The first carton gripper and the second carton gripper move relatively simultaneously to clamp the carton. A first avoidance hole and a second avoidance hole are formed on the mounting substrate. The first avoidance hole is used to avoid the movement of the first carton gripper, and the second avoidance hole is used to avoid the movement of the second carton gripper.

[0015] Preferably, the license plate gripping driving device includes two cylinders, which are a third cylinder and a fourth cylinder respectively. The two license plate grippers are a first license plate gripper and a second license plate gripper respectively. The third cylinder drives the first license plate gripper, and at the same time, the fourth cylinder drives the second license plate gripper. The first license plate gripper and the second license plate gripper move relatively simultaneously to clamp the license plate.

[0016] After adopting the above technical solution, the beneficial effects of the present invention are: The license plate automatic packing machine of the present invention has a license plate conveyor belt for transporting the endorsed license plates. The endorsed license plates are output from the conveyor belt of the license plate endorsing machine. The license plate conveyor belt transports the endorsed license plates from the outer end of the belt towards the direction close to the paper feeding pressure roller group, which is opposite to the direction of the liner paper coming out. The paper roll is sleeved on the air shaft and fixed. The beginning of the liner paper is opened and passed through the gravity pressing roller in the liner paper buffer bin. The liner paper is wound around the gravity pressing roller. The air shaft rotates to unwind the paper roll, and the gravity pressing roller moves downward along the vertical long guide hole under its own weight, thereby pulling the liner paper downward and pre-storing a section of the liner paper in the buffer bin. The liner paper is pre-unwound and buffered to make the liner paper sent between the paper feeding pressure roller group and the paper roll controlled and not deformed or wrinkled. And even as the paper on the paper roll becomes less and less, the working requirements of the paper feeding pressure roller group will not be insufficiently supplied, making the paper output match the working rhythm of the paper feeding pressure roller group and avoiding the phenomenon of incomplete paper output.

[0017] While pre-unwinding and buffering the liner paper as described above, the carton clamping jaw mechanism clamps the carton and places it in the carton placement area. The empty carton rectifying mechanism automatically rectifies the carton. The two-dimensional code reader reads the two-dimensional code on the carton and the total control system issues the production task. After a pre-stored section of the liner paper passes through the paper feeding pressure roller group, it protrudes a certain distance between the fixed cutter and the movable cutter of the paper cutting mechanism. The movable liner paper clamping jaw moves to the inner limit position (the position close to the paper feeding pressure roller group) to clamp the liner paper. After clamping, the movable liner paper clamping jaw moves along the linear guide rail assembly. At the same time, the two paper feeding rollers rotate simultaneously to pull the liner paper to the predetermined position and wait. The license plate clamping manipulator assembly hovers above the liner paper (the liner paper is at the predetermined position and waiting) at a certain distance through the operation of the robotic arm. After the endorsing machine completes the endorsement of the license plate, it is transported to the license plate conveyor belt of the license plate automatic packing machine of the present invention. When the endorsed license plate is transported by the license plate conveyor belt to the license plate limit position, the endorsed license plate will temporarily stay here. The license plate clamping manipulator assembly moves downward to the appropriate position, and the license plate clamping jaw mechanism moves and clamps the license plate and the liner paper above it. Subsequently, the movable liner paper clamping jaw releases the liner paper and moves outward until it is completely separated from the liner paper. The paper cutting mechanism cuts the liner paper. Then the license plate clamping jaw mechanism clamps the license plate and the liner paper and lifts them. Through the operation of the robotic arm, the license plate clamping jaw mechanism puts the clamped license plate and the liner paper (the cut liner paper) into the carton in the carton placement area. After the carton is full of license plates, the full carton pushing mechanism automatically pushes it onto the corresponding automatic docking device, and the automatic docking device removes the full carton.

[0018] The license plate clamping manipulator assembly can not only grasp the license plate and the liner paper simultaneously, but also clamp the carton, eliminating the need for manual pre-placement of the carton in advance and being able to dock with the automatic carton receiving device, avoiding manual handling and greatly improving the degree of automation.

[0019] A paper roll baffle group is provided on the air shaft, which can prevent the paper roll from skewing, avoid inaccurate paper feeding positions and paper roll scattering. An oblique protrusion is provided in the middle of the second rubber pressing roller, and an oblique depression adapted to the oblique protrusion is provided in the middle of the first rubber pressing roller. When the first rubber pressing roller abuts against the second rubber pressing roller, the oblique protrusion and the oblique depression cooperate to press out an anti-rolling vertical groove in the middle of the passing lining paper to prevent the lining paper from curling. The anti-rolling vertical groove extends along the length direction of the lining paper. The anti-rolling vertical groove can maintain the shape of the lining paper after paper feeding, and prevent the lining paper from curling autonomously, resulting in the failure of protection.

[0020] In summary, the license plate automatic packing machine of the present invention enables the lining paper sent between the paper feeding pressing roller group and the paper roll to be controlled and not deformed or wrinkled, and avoids the phenomenon of incomplete paper feeding, will not cause the paper feeding pressing roller group to jam the paper and malfunction. The movable lining paper clamping jaws cooperate with the paper feeding pressing roller group to send out the lining paper, ensuring that the length of each lining paper is consistent and controlled, neat and uniform, and the lining paper can be pulled out in advance and wait for the license plate to act, reducing the paper feeding time. And there is no need to manually place empty cartons in advance. The license plate clamping manipulator assembly can automatically clamp empty cartons, and can clamp license plates and lining paper and put them into the properly sized empty cartons. After the license plates are full of the box, it can be docked with the automatic box receiving device, and the full box pushing mechanism automatically pushes the full box out to the corresponding automatic docking equipment, and the automatic docking equipment removes the full box, avoiding manual handling. During the use of the license plate automatic packing machine of the present invention, the manual labor is greatly reduced, and the automation degree of the license plate automatic packing machine is greatly improved. Description of the Drawings

[0021] The present invention will be further described below with reference to the drawings and embodiments.

[0022] Figure 1 is a schematic structural diagram of the license plate automatic packing machine of the present invention; Figure 2 is Figure 1 a schematic structural diagram of the license plate automatic packing machine in [reference number] with the manipulator and part of the machine cover hidden; Figure 3 is a schematic structural diagram of the license plate automatic packing machine with the manipulator, part of the machine cover and the license plate conveyor belt hidden; Figure 4 is a schematic structural diagram of the empty box rectifying mechanism; Figure 5 is a schematic structural diagram of the lining paper automatic transmission and cutting assembly of the present invention; Figure 6 is Figure 5 a schematic structural diagram of the lining paper automatic transmission and cutting assembly in [reference number] with the side baffle hidden; Figure 7 is Figure 5 a side view of the lining paper automatic transmission and cutting assembly in [reference number] with the side plate of the bin hidden; Figure 8 is Figure 5Schematic diagram of the structure of the automatic transfer and cutting assembly of the backing paper from another perspective; Figure 9 Schematic diagram of the backing paper roll placed on the automatic transfer and cutting assembly of the backing paper; Figure 10 Schematic diagram of the structure of the license plate gripping manipulator assembly of the present invention; Figure 11 is Figure 10 Schematic diagram when the photoelectric switch and one carton gripper are hidden in; Figure 12 Schematic diagram of the structure of the license plate gripping manipulator assembly of the present invention from another perspective; In the figure: 1, frame; 2, automatic conveying and cutting assembly for backing paper; 200, main body plate; 201, air shaft; J, paper roll; 2011, first motor; 2012, speed reducer; 2021, buffer bin; 20221, first guiding roller; 20222, second guiding roller; 20223, first auxiliary guiding roller; 20224, second auxiliary guiding roller; 2023, gravity pressing roller; 2024, proximity switch; 20211, vertical long guiding hole; 2001, side plate of bin body; 2002, bottom plate of bin body; 2031, first rubber pressing roller; 2032, second rubber pressing roller; 20321, inclined protrusion; 20311, inclined depression; 2033, air cylinder; 2003, connecting bracket; 2041, second motor; 2042, driving pulley; 2043, driven pulley; 2045, synchronous belt; 2051, fixed cutting knife; 2052, movable cutting knife; 2053, cutting air cylinder; 2004, avoidance hole; 206, floating joint; 2071, fixed pin; 2072, spring; 2073, spring connecting plate; 2081, fixed baffle; 2082, movable baffle; 2083, adjusting long round hole; 2084, round hole; 3, number plate gripping manipulator assembly; 300, mounting substrate; 301, first air cylinder; 302, second air cylinder; 303, first carton gripper; 304, second carton gripper; 305, third air cylinder; 306, fourth air cylinder; 307, first number plate gripper; 308, second number plate gripper; 3001, first avoidance hole; 3002, second avoidance hole; 3031, carton clamping plate; 3032, rubber pad; 3033, carton gripper reinforcing rib; 30311, gripper arm; 30312, observation hole; 30313, reinforcing rib plate; 3091, positioning wheel bracket; 3092, positioning wheel; 30921, mounting long round hole; 3010, support column plate; 3011, photoelectric switch; 3012, sensor; 3013, guide rail; 3014, slider; 4, movable backing paper gripper; 401, gripper power device; 402, upper clamping plate; 403, lower clamping plate; 5, number plate conveyor belt; 501, motor; 502, first belt transmission mechanism; 6, gripper bracket; 601, first guide rail; 602, first slider; 700, side plate; 7001, scanning window; 701, carton placement bottom plate; 702, pushing plate; 703, movable alignment plate; 704, liftable alignment plate; 705, second power device; 706, first power device; 707, movable alignment arm; 708, third power device; 8, number plate baffle; G, carton placement area. Detailed implementation mode

[0023] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments to further understand the purpose, solution and efficacy of the present invention, but it is not intended to limit the scope of protection of the appended claims of the present invention.

[0024] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0025] In addition, although the terms first, second, third, etc. may be used in the text to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may only be used to distinguish one element, component, region, layer, or section from another region, layer, or section. Unless the context clearly indicates otherwise, terms such as "first", "second", and other numerical terms do not imply an order or sequence when used in the text. Therefore, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the exemplary embodiments.

[0026] For ease of description, we assume a reference coordinate system above. The setting of the reference coordinate system should not be construed as a limitation to the present invention. Figures 1 to 3 as

[0027] such as Figures 1 to 3 shown in the license plate automatic boxing machine, a license plate conveyor belt 5 for conveying license plates, a liner automatic conveying and cutting assembly 2 for conveying and cutting liners, a movable liner gripper 4, and a license plate gripping manipulator assembly 3 are installed on the frame 1. The motor 501 drives the license plate conveyor belt 5 to operate through a first belt drive mechanism 502. The first belt drive mechanism 502 includes a first driving pulley, a first driven pulley, and a first synchronous belt. The first synchronous belt is wound around the first driving pulley and the first driven pulley.

[0028] The movable liner gripper 4 is located above the license plate conveyor belt 5. A linear guide assembly is provided between the movable liner gripper 4 and the frame 1. The movable liner gripper 4 can reciprocate along the linear guide assembly. The extending direction of the linear guide assembly is parallel to the conveying direction of the license plate conveyor belt 5. The automatic conveying and cutting assembly 2 of the backing paper includes a main body plate 200, on which an air shaft 201 for placing the paper roll J, a paper feeding pressure roller group for feeding the paper, and a paper cutting mechanism for cutting the paper are installed. A backing paper buffer bin assembly is arranged below the air shaft 201. The backing paper buffer bin assembly includes a buffer bin 2021, two guiding rollers, and a gravity pressing roller 2023. Both the guiding rollers and the gravity pressing roller include a core shaft and a roller body. The roller body is sleeved outside the core shaft and rotates relative to the core shaft. Both ends of the core shaft extend out of the roller body. Two spaced fixing rings are fixed on the roller body, and the two fixing rings are used to limit both sides of the backing paper to prevent the backing paper from running off.

[0029] The guiding rollers are installed in the buffer bin 2021. Both ends of the core shafts of the guiding rollers are respectively fixed on two opposite side walls of the buffer bin 2021. The two guiding rollers are respectively a first guiding roller 20221 and a second guiding roller 20222. A vertical guiding member is arranged on the bin wall of the buffer bin 2021. The gravity pressing roller 2023 is slidably connected with the buffer bin 2021 through the vertical guiding member. A proximity switch 2024 is fixed at the bottom of the buffer bin 2021. When the gravity pressing roller 2023 slides to the lower end along the vertical guiding member, it will be sensed by the proximity switch 2024, and then the proximity switch 2024 acts to control the output shaft of the first motor 2011 to stop rotating, so that the air shaft 201 stops rotating and unwinding.

[0030] A power device for driving the rotation of the air shaft 201 is fixed on the main body plate 200. The power device includes a first motor 2011 and a speed reducer 2012. The air shaft 201, the first motor 2011, and the speed reducer 2012 are all arranged near the top of the main body plate 200. The specific structure is that one end of the air shaft 201 is connected to the speed reducer 2012, the speed reducer 2012 is connected to the first motor 2011, and a paper roll J is sleeved on the air shaft 201. The air shaft 201 is used to support and drive the rotation of the paper roll J for unwinding.

[0031] The license plate clamping manipulator assembly 3 includes a carton clamping jaw mechanism for clamping the carton and a license plate clamping jaw mechanism for clamping the license plate. After the carton clamping jaw mechanism clamps the carton, it is placed in the carton placement area G. The license plate conveyor belt 5 runs the license plates from the outer end to the inner end of the belt, that is, conveys the license plates in the positive direction of the Y axis.

[0032] After the backing paper cached in the cache bin passes through the paper feeding pressure roller group, the backing paper cached in the cache bin is sent out a certain distance by the paper feeding pressure roller group. The movable backing paper gripper 4 moves closer to the paper feeding pressure roller group to clamp the backing paper. The paper feeding pressure roller group and the movable backing paper gripper 4 operate simultaneously to pull the backing paper to a predetermined position for standby. The license plate clamping manipulator assembly 3 is installed on the robotic arm. The license plate clamping manipulator assembly 3 hovers above the backing paper (the backing paper is at the predetermined position for standby at this time) at a certain distance through the operation of the robotic arm. After the license plate is endorsed by the endorsing machine, it is conveyed to the license plate conveyor belt of the license plate automatic packing machine of the present invention. When the endorsed license plate is conveyed to the license plate limiting position by the license plate conveyor belt 5, the structure for limiting the license plate at the license plate limiting position is the license plate baffle 8, and the license plate baffle 8 is fixed on the machine frame.

[0033] The endorsed license plate will stay here temporarily. At this time, the license plate clamping manipulator assembly 3 moves downward to a suitable position, and the license plate gripper mechanism moves and clamps the license plate and the backing paper above it. During this process, the backing paper is pressed on the license plate by the positioning wheel 3092 of the license plate clamping manipulator assembly 3 to prevent the backing paper from sliding, fluttering, or shifting. Subsequently, the movable backing paper gripper releases the backing paper and moves outward until it is completely separated from the backing paper. The paper cutting mechanism cuts the backing paper, and then the license plate gripper mechanism clamps the license plate and the backing paper and lifts them. Through the operation of the robotic arm, the license plate gripper mechanism puts the clamped license plate and the backing paper (the cut backing paper) into the carton in the carton placement area. After putting down the license plate and the backing paper, the license plate clamping manipulator assembly 3 resets, that is, it resets to standby above the license plate conveyor belt 5.

[0034] Among them, while the license plate gripper mechanism clamps the license plate and the backing paper and lifts them, the space vacated below it is sufficient for the backing paper gripper to move. Then, the paper feeding pressure roller group and the movable backing paper gripper 4 will repeat the previous paper feeding and pulling actions in a cycle, that is, "the backing paper cached in the cache bin is sent out a certain distance by the paper feeding pressure roller group, the movable backing paper gripper 4 moves closer to the paper feeding pressure roller group to clamp the backing paper, and the paper feeding pressure roller group and the movable backing paper gripper 4 operate simultaneously to pull the backing paper to a predetermined position for standby". Each component of the license plate automatic packing machine cooperates with each other and repeats the above working process continuously to automatically pack the endorsed license plates.

[0035] As Figure 2 shown, in some embodiments, the movable backing paper gripper 4 is installed on the gripper bracket 6. The movable backing paper gripper 4 includes a gripper power device 401, an upper clamping plate 402, and a lower clamping plate 403. The gripper power device 401 preferably uses a cylinder. The gripper power device 401 drives the upper clamping plate 402 to approach or move away from the lower clamping plate 403 to clamp or release the backing paper. The cylinder drives the upper clamping plate 402 to approach the lower clamping plate 403 to clamp the backing paper.

[0036] The linear guide assembly includes a first guide rail 601 and a first slider 602. The first slider 602 is movable along the first guide rail 601. The first guide rail 601 is fixed on the frame 1. The first guide rail 601 is arranged parallel to the license plate conveyor belt 5. The gripper bracket 6 is fixedly connected to the first slider 602.

[0037] As Figures 2 to 4 shown, an empty carton rectifying mechanism and a full carton pushing mechanism are provided at the carton placement area G. The empty carton rectifying mechanism includes a carton placement bottom plate 701 fixed to the frame 1, a side plate 700 perpendicular to and fixed to the carton placement bottom plate 701, a movable rectifying plate 703, a liftable rectifying plate 704, and a movable rectifying arm 707. The movable rectifying plate 703 faces the side plate 700. The carton placement bottom plate 701 is provided with a rectifying plate avoidance hole for the liftable rectifying plate 704 to pass through. The first power device 706 drives the liftable rectifying plate 704 to extend out of or retract into the carton placement bottom plate 701. The liftable rectifying plate 704 and the movable rectifying arm 707 are in relative positions. The second power device 705 drives the movable rectifying plate 703 to approach or move away from the side plate 700. The first power device 706 preferably uses a cylinder. The second power device 705 preferably uses a cylinder. The third power device 708 drives the movable rectifying arm 707 to approach or move away from the liftable rectifying plate 704. The third power device 708 preferably uses a cylinder.

[0038] The full carton pushing mechanism includes a pushing plate 702 and a carton pushing power device. The pushing plate is provided with a rectifying arm avoidance hole for the movable rectifying arm 707 to pass through. The carton pushing power device pushes the pushing plate 702 to extend or retract. The carton pushing power device preferably uses a cylinder.

[0039] After the liftable rectifying plate 704 rises and extends out of the carton placement bottom plate 701, the license plate gripping manipulator assembly 3 grips a carton (empty carton) and places the carton on the carton placement bottom plate 701. The movable rectifying plate 703 and the movable rectifying arm 707 move simultaneously to make the empty carton lean against the side plate 700 and the liftable rectifying plate 704, so as to achieve the purpose of rectifying the empty carton. When placing license plates into the carton, the empty carton rectifying mechanism can prevent the carton from moving.

[0040] A QR code reader is installed at the empty box rectifying mechanism near the cardboard box placement area G. A scanning window 7001 is provided on the side plate 700. The QR code reader can identify the QR code on the cardboard box at the scanning window 7001. The cardboard box clamping mechanism of the license plate clamping manipulator assembly 3 grabs the transported empty box and places it in the cardboard box placement area. After being rectified and positioned by the empty box rectifying mechanism, the QR code on the cardboard box is identified by the QR code reader to issue a production task, and then waits for the license plate to be placed in the cardboard box. When the box is full, it starts to match and dock with the external automatic box receiving device. At the same time, the liftable rectifying plate 704 is lowered and retracted to be flush with or below the cardboard box placement bottom plate 701. The push plate 702 of the full box pushing mechanism pushes the cardboard box onto the automatic box receiving device, and the automatic box receiving device takes away and transfers the cardboard box.

[0041] In some embodiments: as Figures 5 to 9 shown, the vertical guiding member is a vertical long guiding hole 20211. The vertical long guiding hole 20211 is opened on two opposite bin walls of the buffer bin 2021, and the core shaft of the gravity pressing roller 2023 can slide in the vertical long guiding hole 20211.

[0042] Of course, the vertical guiding member can also be set as a guide rail strip, and a guiding groove for the two ends of the core shaft of the gravity pressing roller 2023 to slide is provided on the guide rail strip. The vertical guiding member can also be set with other structures.

[0043] The paper feeding pressure roller group and the paper cutting mechanism are located at the paper feeding and cutting bin body. The paper feeding and cutting bin is provided with a bin body side plate 2001 opposite to the main body plate 200 and a bin body bottom plate 2002 fixedly connecting the main body plate 200 and the bin body side plate 2001.

[0044] In some embodiments: The paper feeding pressure roller group is located in the paper feeding and cutting bin. The paper feeding pressure roller group includes a first rubber pressing roller 2031 and a second rubber pressing roller 2032, that is, both ends of the first rubber pressing roller 2031 and the second rubber pressing roller 2032 are respectively connected and installed on the main body plate 200 and the bin body side plate 2001.

[0045] The first rubber pressing roller 2031 is slidably connected to the main body plate 200. Vertical long holes (the length of the holes is along the Z direction) are correspondingly opened on the main body plate 200 and the bin body side plate 2001, and both ends of the first rubber pressing roller 2031 can slide relative to the vertical long holes.

[0046] The first rubber pressing roller 2031 includes a first central shaft and a first outer roller body. A bearing is installed between the first outer roller body and the first central shaft. The first outer roller body rotates relative to the first central shaft. The two ends of the first central shaft extend out of the first outer roller body, and part of the material at the extending ends of the two first central shafts (that is, both ends of the first outer roller body) is removed to adapt to the width of the above-mentioned vertical long holes. The second rubber pressing roller 2032 includes a second central shaft and a second outer roller body. The second outer roller body is sleeved outside the second central shaft and the two are fixed.

[0047] The second rubber pressing roller 2032 is rotatably installed on the main body plate 200. The first power device pushes the first rubber pressing roller 2031 against the second rubber pressing roller 2032, and the second power device drives the second rubber pressing roller 2032 to rotate.

[0048] The first power device is set as a cylinder 2033. The cylinder body of the cylinder 2033 is installed on the main body plate 200 through a fixing plate. The piston rod of the cylinder 2033 is connected to the first rubber pressing roller 2031 through a connecting bracket 2003. The connecting bracket 2003 is a U-shaped bracket. The connecting bracket 2003 includes a cylinder support plate and a roller connecting ear. The two roller connecting ears are respectively fixed at both ends of the cylinder support plate. The cylinder support plate is fixedly connected to the piston rod of the cylinder. Installation holes are provided on the roller connecting ears, and both ends of the first rubber pressing roller 2031 are inserted into the installation holes. The cylinder pushes the connecting bracket 2003 to bring the first rubber pressing roller 2031 against the second rubber pressing roller 2032, and the gap between the first rubber pressing roller 2031 and the second rubber pressing roller 2032 can be adjusted. This is more convenient and faster than adjusting the gap by adjusting the limit bolt in the prior art.

[0049] As Figure 8 shown, an oblique protrusion 20321 is provided in the middle of the second rubber pressing roller 2032, and an oblique depression 20311 adapted to the oblique protrusion 20321 is provided in the middle of the first rubber pressing roller 2031. When the first rubber pressing roller 2031 is against the second rubber pressing roller 2032, the oblique protrusion 20321 and the oblique depression 20311 cooperate to press out an anti-roll vertical groove for preventing the lining paper from curling in the middle of the passing lining paper. The anti-roll vertical groove extends along the length direction of the lining paper. The anti-roll vertical groove can maintain the shape of the lining paper after it is discharged, and prevent the lining paper from curling autonomously and causing the protection to fail.

[0050] As Figure 6 and Figure 7 shown, the second power device includes a second motor 2041, a driving pulley 2042, a driven pulley 2043 and a synchronous belt 2045. The output shaft of the second motor 2041 is fixedly connected to the driving pulley 2042. One end of the second rubber pressing roller 2032 is fixedly connected to the driven pulley 2043, and a synchronous belt 2045 is wound between the driving pulley 2042 and the driven pulley 2043.

[0051] A paper cutting mechanism for cutting paper is installed on the main body board 200. The paper cutting mechanism is located below the air shaft 201 and above the buffer bin 2021. The paper cutting mechanism includes a fixed cutter 2051 and a movable cutter 2052. One end of the movable cutter 2052 is hinged to the fixed cutter 2051, and the other end of the movable cutter 2052 is connected to a cutting cylinder 2053. An avoidance hole 2004 for avoiding the movable cutter 2052 is provided on the main body board 200. The cutting cylinder 2053 drives the movable cutter 2052 to open and close relative to the fixed cutter 2051 for shearing. The working principle of the fixed cutter 2051 and the movable cutter 2052 during paper cutting is similar to that of a guillotine.

[0052] An auxiliary cutting assembly is provided on the main body board 200. During shearing, the auxiliary cutting assembly pulls the movable cutter 2052 to abut against the fixed cutter 2051. The direction in which the auxiliary cutting assembly pulls the movable cutter 2052 is perpendicular to the direction in which the cutting cylinder 2053 drives the movable cutter 2052.

[0053] In some embodiments, the cutting cylinder 2053 includes a cylinder block and a cylinder rod. The cylinder block is fixed to the main body board 200 through a bracket. The other end of the movable cutter 2052 is connected to the cylinder rod through a floating joint 206, thereby avoiding the cylinder rod being bent or broken by the spring 2072 after long-term use. Assume that the lining paper is conveyed from upstream to downstream. The fixed cutter 2051 and the movable cutter 2052 are located downstream of the paper feeding pressure roller group, and the movable cutter 2052 is located downstream of the fixed cutter 2051. The auxiliary cutting assembly includes a fixed pin 2071, a spring 2072, and a spring connecting plate 2073. The spring connecting plate 2073 is connected to the cylinder rod. The fixed pin 2071 is fixed on the main body board 200. The two ends of the spring 2072 are respectively connected to the fixed pin 2071 and the cylinder rod. The direction in which the spring 2072 pulls is perpendicular to the direction in which the cylinder rod extends. The spring 2072 pulls the movable cutter 2052 to abut against the fixed cutter 2051 in the upstream direction.

[0054] The cutting cylinder 2053 pushes and pulls the movable cutter 2052 to perform opening and closing movement along the Z-axis direction. The spring 2072 pulls the cylinder rod in the negative Y-axis direction, so that the movable cutter 2052 abuts against the fixed cutter 2051 in the negative Y-axis direction.

[0055] In some embodiments, as Figure 8 shown, a paper roll baffle group is provided on the air shaft 201. The paper roll baffle group includes a fixed baffle 2081 and a movable baffle 2082. The fixed baffle 2081 is fixed to the air shaft 201 and is close to the free end of the air shaft 201. The axial position of the movable baffle 2082 relative to the air shaft 201 is adjustable. When the axial dimension (width) of the paper roll J changes, the movable baffle 2082 can be moved according to the axial dimension of the paper roll J.

[0056] The setting of the paper roll baffle group can prevent the paper roll from skewing, avoid inaccurate paper feeding positions, and prevent the paper roll from scattering.

[0057] The movable baffle 2082 includes a connecting sleeve part and a disc part. The connecting sleeve part is sleeved on the air shaft 201, and a flange sleeve is sleeved on the connecting sleeve part. One end of the flange sleeve is fixed on the main body plate 200, and the connecting sleeve part and the flange sleeve are connected by an adjusting oblong hole 2083, a round hole 2084, and an adjusting bolt.

[0058] A paper roll end-of-material fiber optic sensor can be optionally installed on one of the fixed baffle 2081 and the movable baffle 2082 to remind to replace the paper roll when the paper roll runs out of material.

[0059] The flange sleeve is provided with an adjusting oblong hole 2083, and the connecting sleeve part is provided with a round hole. The adjusting bolt fixedly connects the flange sleeve and the movable baffle 2082 through the adjusting oblong hole 2083 and the round hole. Of course, the adjusting oblong hole 2083 can also be provided on the connecting sleeve part, and the round hole is provided on the flange sleeve.

[0060] The main body plate 200 is also fixedly provided with auxiliary guide rollers, namely a first auxiliary guide roller 20223 and a second auxiliary guide roller 20224. The auxiliary guide rollers are located above the buffer bin 2021. The first auxiliary guide roller 20223 is located upstream of the buffer bin 2021 and downstream of the air shaft 201, and the second auxiliary guide roller 20224 is located downstream of the buffer bin 2021 and upstream of the paper feeding pressure roller group. Moreover, the second auxiliary guide roller 20224 is close to the paper feeding pressure roller group.

[0061] As Figure 9 shown, the paper roll J is sleeved on the air shaft 201. One end of the backing paper passes through the first auxiliary guide roller 20223, the first guide roller 20221, the gravity pressing roller 2023, the second guide roller 20222, and the second auxiliary guide roller 20224 in sequence, and then the backing paper enters the paper feeding pressure roller group and is driven by the first rubber pressing roller 2031 and the second rubber pressing roller 2032 to be conveyed downstream. During the above process, the backing paper is wound around the gravity pressing roller 2023, and the gravity pressing roller 2023 moves downward along the vertical long guide hole 20211 due to its own weight, thereby pulling the backing paper downward and driving the paper roll J to rotate, and pre-storing a section of the backing paper in the buffer bin 2021, realizing pre-unwinding. Even as the paper on the paper roll becomes less and less, it will not fail to meet the working requirements of the paper feeding pressure roller group, making the paper output match the working rhythm of the paper feeding pressure roller group and avoiding the phenomenon of incomplete paper output. And pre-unwinding and caching a section of the backing paper can reduce the paper output time.

[0062] When the gravity pressing roller 2023 slides to the lower end along the vertical guide, it will be sensed by the proximity switch 2024, and then the proximity switch 2024 acts, so that the air shaft 201 stops rotating and unwinding.

[0063] As shown Figures 10 to 12 in the number plate clamping manipulator assembly shown, a carton clamping jaw mechanism for clamping cartons and a number plate clamping jaw mechanism for clamping number plates are installed on the mounting substrate 300. The carton clamping jaw mechanism includes a carton clamping jaw driving device and two relatively arranged carton clamping jaws. The carton clamping jaw driving device drives the two carton clamping jaws to move relatively to clamp the carton.

[0064] In some embodiments, the carton clamping jaw driving device includes two air cylinders, preferably double-acting air cylinders.

[0065] The two air cylinders are respectively the first air cylinder 301 and the second air cylinder 302. The two carton clamping jaws are respectively the first carton clamping jaw 303 and the second carton clamping jaw 304. The first air cylinder 301 drives the first carton clamping jaw 303, and the second air cylinder 302 drives the second carton clamping jaw 304. The first carton clamping jaw 303 and the second carton clamping jaw 304 move relatively simultaneously to clamp the carton. Specifically, when the carton is open, the first carton clamping jaw 303 and the second carton clamping jaw 304 clamp a cardboard of the carton, and then lift the carton.

[0066] The number plate clamping jaw mechanism includes a number plate clamping jaw driving device, two relatively arranged number plate clamping jaws and a linear guide rail assembly. In some embodiments, the number plate clamping jaw driving device includes two air cylinders. The two air cylinders are respectively the third air cylinder 305 and the fourth air cylinder 306. The two number plate clamping jaws are respectively the first number plate clamping jaw 307 and the second number plate clamping jaw 308. A linear guide rail assembly is arranged between the number plate clamping jaws and the mounting substrate 300. The number plate clamping jaw driving device drives the two number plate clamping jaws to move relatively along the linear guide rail assembly to clamp the number plate. A lining paper pressing device is fixed on the inner side of the number plate clamping jaws. The two carton clamping jaws are located between the two number plate clamping jaws. Specifically, the piston rod of the third air cylinder 305 pulls the first number plate clamping jaw 307, and at the same time, the piston rod of the fourth air cylinder 306 pulls the second number plate clamping jaw 308. The first number plate clamping jaw 307 and the second number plate clamping jaw 308 move relatively simultaneously to clamp the number plate.

[0067] In some embodiments, as Figure 10 and Figure 11 shown, a first avoidance hole 3001 and a second avoidance hole 3002 are formed on the mounting substrate 300. The first avoidance hole 3001 is used to avoid the movement of the first carton clamping jaw 303, and the second avoidance hole 3002 is used to avoid the movement of the second carton clamping jaw 304.

[0068] In some embodiments, as Figure 11 shown, the carton clamping jaw includes a carton clamping plate 3031. A rubber pad 3032 is fixed on the clamping side of the carton clamping plate 3031, and a carton clamping jaw reinforcing rib 3033 is fixed on the non-clamping side of the carton clamping plate 3031.

[0069] AsFigure 11 As shown, there are two jaw arms 30311 at the lower end of the license plate gripper. The lower end of each jaw arm 30311 slopes inwards, facilitating the clamping of the license plate and preventing the license plate from slipping after being picked up.

[0070] Observation holes 30312 are provided on the license plate gripper. The observation holes 30312 can not only observe the picking-up situation but also play a role in weight reduction. Reinforcing rib plates 30313 are fixed inside the license plate gripper to increase the structural strength of the license plate gripper.

[0071] The backing paper pressing device includes a positioning wheel bracket 3091 and a positioning wheel 3092. The positioning wheel bracket 3091 is provided with two mounting arms, and elongated mounting holes 30921 are opened at the lower end of each mounting arm. The positioning wheel is mounted at the elongated mounting holes 30921. During operation, the license plate gripper simultaneously grabs the license plate and the backing paper, and the positioning wheel 3092 presses on the license plate and the backing paper to limit the position of the backing paper, preventing the backing paper from sliding, fluttering, or shifting.

[0072] The linear guide rail assembly includes a guide rail 3013 and a slider 3014. The slider 3014 can move along the guide rail 3013. The guide rail 3013 is fixedly connected to the mounting substrate 300, and the slider is fixedly connected to the license plate gripper.

[0073] The license plate picking manipulator assembly 3 is installed on the robotic arm. The license plate picking manipulator assembly can not only simultaneously grab the license plate and the backing paper but also grab the cardboard box, and can flexibly adapt to more application scenarios.

[0074] The robotic arm controls the license plate picking manipulator assembly 3 to press the backing paper on the license plate and clamp the license plate. At the same time, the movable backing paper gripper 4 is loosened and then moves outwards a certain distance so that the movable backing paper gripper 4 completely disengages from the backing paper. At this time, the paper cutting mechanism cuts the backing paper to prevent the backing paper from sticking to the movable backing paper gripper 4. The license plate picking manipulator assembly 3 picks up the license plate and the backing paper and moves them above the cardboard box at the cardboard box placement area G. The license plate picking manipulator assembly 3 sinks so that the license plate completely enters the cardboard box, the jaws are loosened, and the license plate and the backing paper simultaneously fall into the cardboard box.

[0075] The above-mentioned license plate picking manipulator assembly can not only pick up the license plate but also pick up the cardboard box, eliminating the need for manual pre-placement of the cardboard box and being able to interface with the automatic box receiving device, avoiding manual handling and greatly improving the degree of automation.

[0076] A support post disk 3010, a photoelectric switch 3011, and a sensor 3012 are fixed on the mounting substrate 300. The support post disk 3010 is used to connect to a robotic arm. The sensor 3012 is used to detect whether the license plate gripper is empty. The photoelectric switch 3011 is used to detect whether there are obstacles affecting its movement within the range of movement of the robotic arm. For example, if someone enters the range of movement of the robotic arm, after the photoelectric switch 3011 detects it, the robotic arm will stop moving, preventing injury to people and also avoiding damage to the robotic arm.

[0077] The above license plate gripping manipulator assembly 3 can automatically grip an empty cardboard box from the cardboard box docking device and place it at the cardboard box placement area G. The empty box rectifying mechanism automatically rectifies the cardboard box. After the license plates are fully loaded into the box, the full box pushing mechanism automatically pushes the full box to the corresponding docking device, and the docking device removes the full box or delivers an empty box.

[0078] The working process of the license plate automatic packing machine of the present invention is as follows: The staff sets the paper roll J on the air shaft 201 and fixes it, opens the beginning of the liner paper, passes it through the gravity pressing roller 2023 of the liner paper buffer bin, and the liner paper wraps around the gravity pressing roller 2023. The air shaft 201 drives the first motor 2011 to perform a pay-off action to send out the liner paper. The gravity pressing roller 2023 moves downward along the vertical long guide hole 20211 due to its own weight, and pre-caches a section of the liner paper in the buffer bin 2021. At the same time as the above operations, the cardboard box gripper mechanism grips the cardboard box and places it in the cardboard box placement area G. The empty box rectifying mechanism automatically rectifies the cardboard box, and the two-dimensional code reader reads the two-dimensional code on the cardboard box and the total control system issues a production task. After a pre-cached section of the liner paper passes through the paper feeding pressure roller group, it protrudes a certain distance between the fixed cutter 2051 and the movable cutter 2052 of the paper cutting mechanism. The movable liner paper gripper 4 moves to the inner limit position (the position close to the paper feeding pressure roller group) and clamps the liner paper. After clamping, the movable liner paper gripper 4 moves along the linear guide rail assembly. At this time, the two paper feeding rollers rotate simultaneously to pull out the liner paper to a predetermined position and wait. The license plate gripping manipulator assembly 3 hovers above the liner paper (the liner paper is at the predetermined position and waiting) at a certain distance through the operation of the robotic arm. After the license plate is signed by the signing machine and conveyed to the license plate conveyor belt of the license plate automatic packing machine of the present invention, when the signed license plate is conveyed to the license plate limit position by the license plate conveyor belt 5, the signed license plate will temporarily stay here. The license plate gripping manipulator assembly 3 moves downward to a suitable position, and the license plate gripper mechanism moves and clamps the license plate and the liner paper above it. Subsequently, the movable liner paper gripper releases the liner paper and moves outward until it is completely separated from the liner paper. The paper cutting mechanism cuts the liner paper, and then the license plate gripper mechanism clamps the license plate and the liner paper and lifts them. Through the operation of the robotic arm, the license plate gripper mechanism places the gripped license plate and the liner paper (the cut liner paper) into the cardboard box at the cardboard box placement area. After the license plates are fully loaded into the box, the full box pushing mechanism automatically pushes the full box to the corresponding automatic docking device, and the automatic docking device removes the full box.

[0079] Among them, while the license plate gripper mechanism clamps and lifts the license plate and the backing paper, when the space vacated below it is sufficient for the backing paper gripper to move, the paper feeding pressure roller group and the movable backing paper gripper 4 will repeatedly perform the previous paper feeding and paper pulling actions in a cycle, and then the paper cutting mechanism will cut the backing paper, and the license plate gripper mechanism will put the clamped license plate and backing paper into the carton at the carton placement area. When the carton is full of license plates, the next empty carton is grabbed by the carton gripper mechanism and placed at the carton placement area G, and the above-mentioned license plate and backing paper packing operations are repeated.

[0080] The license plates on the above-mentioned license plate conveyor belt 5 device usually come from the conveyor belt of the endorsing machine. After the license plates are endorsed by the endorsing machine, they are conveyed by the conveyor belt of the endorsing machine to the license plate conveyor belt 5 of the license plate automatic cartoning machine.

[0081] The license plate automatic cartoning machine of the present invention is provided with a gravity pressing roller to control the non-deformation and non-wrinkling of the backing paper sent between the paper feeding pressure roller group and the paper roll, which will not cause the paper jamming failure of the paper feeding pressure roller group, and the movable backing paper gripper cooperates to pull the backing paper, ensuring that the length of each backing paper is uniformly controlled, neat and tidy. And because the backing paper can be sent out in advance and wait for the license plate action, the paper output time is reduced. The license plate gripping manipulator assembly can not only grab the license plate and the backing paper at the same time, but also grab the carton. The license plate gripping manipulator assembly can automatically grab an empty carton from the carton docking device and place it in the designated area, and automatically align it. The full carton can be automatically pushed out to the corresponding docking device, and the full carton is removed or an empty carton is sent by the docking device. There is no need to manually place the carton in advance, and it can be docked with the automatic carton receiving device to avoid manual handling, greatly improving the degree of automation.

[0082] After the license plates are output from the conveyor belt of the endorsing machine, they are perfectly docked by the license plate conveyor belt of the license plate automatic cartoning machine. The conveying process is fast, the positioning is accurate, and the movement posture is controllable.

[0083] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic license plate packing machine, comprising a frame, characterized in that a license plate conveyor belt for conveying license plates, an automatic lining paper conveying and cutting assembly for conveying and cutting lining paper, a movable lining paper gripper, and a license plate gripping manipulator assembly are installed on the frame; the movable lining paper gripper is located above the license plate conveyor belt, a linear guide rail assembly is arranged between the movable lining paper gripper and the frame, and the extending direction of the linear guide rail assembly is parallel to the conveying direction of the license plate conveyor belt; the automatic lining paper conveying and cutting assembly includes a main body plate, an air shaft for placing a paper roll, a paper feeding pressure roller group for feeding paper, and a paper cutting mechanism for cutting paper are installed on the main body plate, a lining paper buffer bin assembly is arranged below the air shaft, the lining paper buffer bin assembly includes a buffer bin, a guide roller, and a gravity pressing roller, the guide roller is installed in the buffer bin, a vertical guide is arranged on the bin wall of the buffer bin, the gravity pressing roller is slidably connected with the buffer bin through the vertical guide, a proximity switch is fixed at the bottom of the buffer bin, and when the gravity pressing roller slides to the lower end along the vertical guide, the proximity switch acts, so that the air shaft stops rotating and unwinding; the license plate gripping manipulator assembly includes a carton gripper mechanism for gripping a carton and a license plate gripper mechanism for gripping license plates and lining paper, and after the carton gripper mechanism grips the carton, it is placed in the carton placement area; the lining paper cached in the buffer bin is sent out a certain distance by the paper feeding pressure roller group, the movable lining paper gripper moves close to the paper feeding pressure roller group to clamp the lining paper, and the paper feeding pressure roller group and the movable lining paper gripper run simultaneously to pull the lining paper to a predetermined position for standby; when the license plate after endorsement is conveyed by the license plate conveyor belt to the license plate limit position, the license plate gripper mechanism moves and clamps the license plate and the lining paper above it, then the movable lining paper gripper releases the lining paper and runs outwards to disengage from the lining paper, the paper cutting mechanism cuts off the lining paper, and the license plate gripper mechanism puts the gripped license plate and the lining paper into the carton in the carton placement area; 2. The license plate automatic packing machine according to claim 1, characterized in that: the movable lining paper gripper is installed on a gripper support, the movable lining paper gripper includes a gripper power device, an upper clamping plate, and a lower clamping plate, and the gripper power device drives the upper clamping plate to approach or move away from the lower clamping plate to clamp or release the lining paper; the linear guide rail assembly includes a guide rail and a slider, the slider can move along the guide rail, the guide rail is fixed on the frame, the guide rail is arranged parallel to the license plate conveyor belt, and the gripper support is fixedly connected with the slider.

3. The license plate automatic packing machine according to claim 2, characterized in that: An empty carton rectifying mechanism and a full carton pushing mechanism are provided at the carton placement area. The empty carton rectifying mechanism includes a carton placement bottom plate fixed to the frame, a side plate perpendicular to and fixed to the carton placement bottom plate, a movable rectifying plate, a liftable rectifying plate, and a movable rectifying arm. The movable rectifying plate faces the side plate. The carton placement bottom plate is provided with a rectifying plate avoidance hole for the liftable rectifying plate to pass through. A first power device drives the liftable rectifying plate to extend out of or retract into the carton placement bottom plate. The liftable rectifying plate and the movable rectifying arm are in relative positions. A second power device drives the movable rectifying plate to approach or move away from the side plate. A third power device drives the movable rectifying arm to approach or move away from the liftable rectifying plate; The full carton pushing mechanism includes a pushing plate and a carton pushing power device. The pushing plate is provided with a rectifying arm avoidance hole for the movable rectifying arm to pass through. The carton pushing power device pushes the pushing plate to extend or retract.

4. The license plate automatic packing machine according to claim 3, characterized in that: The vertical guiding member is a vertical long guiding hole, which is opened on two opposite bin walls of the buffer bin. The paper feeding pressure roller group includes a first rubber pressure roller and a second rubber pressure roller. An oblique protrusion is provided in the middle of the second rubber pressure roller, and an oblique depression adapted to the oblique protrusion is provided in the middle of the first rubber pressure roller. When the first rubber pressure roller and the second rubber pressure roller are in contact, the oblique protrusion and the oblique depression cooperate to press out a vertical anti - curling groove in the middle of the passing liner paper to prevent the liner paper from curling.

5. The license plate automatic packing machine according to claim 4, characterized in that: The first rubber pressure roller is slidably connected to the main body plate, and the second rubber pressure roller is rotatably installed on the main body plate. A first power device pushes the first rubber pressure roller to contact the second rubber pressure roller, and a second power device drives the second rubber pressure roller to rotate.

6. The license plate automatic packing machine according to claim 5, characterized in that: The paper cutting mechanism is located below the air - expanding shaft and above the buffer bin. The paper cutting mechanism includes a fixed cutter and a movable cutter. One end of the movable cutter is hinged to the fixed cutter, and the other end of the movable cutter is connected to a cutting cylinder. The cutting cylinder drives the movable cutter to open and close relative to the fixed cutter for shearing. An auxiliary cutting assembly is provided on the main body plate. During shearing, the auxiliary cutting assembly pulls the movable cutter to contact the fixed cutter, and the direction in which the auxiliary cutting assembly pulls the movable cutter is perpendicular to the direction in which the cutting cylinder drives the movable cutter.

7. The license plate automatic packing machine according to claim 6, characterized in that: The cutting cylinder includes a cylinder rod, and the other end of the movable cutter is connected to the cylinder rod through a floating joint. Assume that the liner paper is conveyed from upstream to downstream. The fixed cutter and the movable cutter are located downstream of the paper feeding pressure roller group, and the movable cutter is located downstream of the fixed cutter. The auxiliary cutting assembly includes a fixed pin, a spring, and a spring connecting plate. The spring connecting plate is connected to the cylinder rod. The fixed pin is fixed on the main body plate. The two ends of the spring are respectively connected to the fixed pin and the cylinder rod. The direction in which the spring pulls is perpendicular to the direction in which the cylinder rod extends. The spring pulls the movable cutter to contact the fixed cutter in the upstream direction.

8. The license plate automatic packing machine according to claim 1, characterized in that: The license plate clamping manipulator assembly includes a mounting substrate, on which the carton clamping jaw mechanism and the license plate clamping jaw mechanism are installed. The carton clamping jaw mechanism includes a carton clamping jaw driving device and two relatively arranged carton clamping jaws. The carton clamping jaw driving device drives the two carton clamping jaws to move relatively to clamp the carton. The license plate clamping jaw mechanism includes a license plate clamping jaw driving device, two relatively arranged license plate clamping jaws and a linear guide rail assembly. The linear guide rail assembly is arranged between the license plate clamping jaws and the mounting substrate. The license plate clamping jaw driving device drives the two license plate clamping jaws to move relatively along the linear guide rail assembly to clamp the license plate. A backing paper pressing device is fixed on the inner side of the license plate clamping jaws. The two carton clamping jaws are located between the two license plate clamping jaws.

9. The license plate automatic packing machine according to claim 8, wherein: The carton clamping jaw driving device includes two air cylinders, which are the first air cylinder and the second air cylinder respectively. The two carton clamping jaws are the first carton clamping jaw and the second carton clamping jaw respectively. The first air cylinder drives the first carton clamping jaw, and the second air cylinder drives the second carton clamping jaw. The first carton clamping jaw and the second carton clamping jaw move relatively simultaneously to clamp the carton. The mounting substrate is provided with a first avoidance hole and a second avoidance hole. The first avoidance hole is used to avoid the movement of the first carton clamping jaw, and the second avoidance hole is used to avoid the movement of the second carton clamping jaw.

10. The license plate automatic packing machine according to claim 8, characterized in that: The license plate clamping jaw driving device includes two air cylinders, which are the third air cylinder and the fourth air cylinder respectively. The two license plate clamping jaws are the first license plate clamping jaw and the second license plate clamping jaw respectively. The third air cylinder drives the first license plate clamping jaw, and at the same time, the fourth air cylinder drives the second license plate clamping jaw. The first license plate clamping jaw and the second license plate clamping jaw move relatively simultaneously to clamp the license plate.

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