Food packaging paper bag opening device

Abstract

The utility model relates to the technical field of food packaging, in particular to a food packaging paper bag opening device which comprises a bag taking mechanism, a bag opening mechanism, a paper bag conveyor and a food conveyor. The bag taking mechanism comprises a paper bag box and a paper bag bin arranged on one side of the paper bag box, a paper rubbing assembly and a paper bag tray are arranged in the paper bag box, and a plurality of conveying assemblies are arranged in the paper bag bin; the bag opening mechanism comprises a protective shell, a transmission assembly and a bag opening assembly, the bag opening assembly is located in the protective shell, and the transmission assembly is in transmission connection with the bag opening assembly; the bag opening mechanism comprises a bag opening frame body, a crank extrusion structure and a working disc, the crank extrusion structure and the working disc are arranged on the bag opening frame body, a plurality of bag opening structures are distributed on the working disc, and an intermittent rotation mechanism used for driving the working disc to rotate is arranged on the bag opening frame body. Paper bags stacked in the paper bag bin can be conveniently taken out one by one, meanwhile, the paper bags can be conveniently opened, and therefore food can be conveniently arranged in the paper bags in a sleeved mode.

Description

Technical Field

[0001] The utility model relates to the technical field of food packaging, in particular to a food packaging paper bag opening device. Background Art

[0002] After food processing is completed, food packaging operations are required. During the circulation process from the factory to the hands of consumers, food is protected from damage by external factors such as biological, chemical, and physical factors. It can also maintain the stable quality of the food itself. It is convenient for eating food, and it is the first to show the appearance of food and attract consumers. It has value beyond material cost. Food packaging bags can facilitate the transportation and storage of food, reduce food losses during the circulation process. Exquisite packaging design can attract consumers and improve the market competitiveness of food. Food packaging can be divided into metal, glass, paper, plastic, composite materials, etc. according to the packaging material.

[0003] At present, when using paper bags to package food, due to the differences in size, shape, material and thickness of paper bags, the state of paper bags when leaving the factory is that multiple paper bags are stacked and placed adjacent to each other. When the staff places the paper bags for packaging food, they directly put the multiple stacked paper bags into the paper bag box. Therefore, in order to complete the subsequent packaging of food, individual paper bags need to be taken out. Moreover, due to the fragility and easy wrinkling of paper bags, existing mechanical equipment has difficulty in taking out and opening the stacked paper bags. At the same time, due to the difficulty in integration with food filling equipment, manual labor is required to complete the food bagging operation, which is labor-intensive, has high safety risks, and is difficult to ensure food hygiene. There is a defect that it is inconvenient to carry out food bagging operations. Summary of the Invention

[0004] The utility model aims to solve the problems in the prior art of difficulty in removing and opening stacked paper bags and inconvenience in bagging food, and provides a food packaging paper bag opening device, which is convenient for removing individual stacked paper bags in a paper bag box and is also convenient for completing the bag opening operation on the paper bags, thereby making it convenient to put food in the paper bags.

[0005] To achieve the above-mentioned objectives, the present invention provides a device for opening paper bags for food packaging, comprising a bag-taking mechanism, a bag-opening mechanism, a paper bag conveyor, and a food conveyor. The bag-opening mechanism and the paper bag conveyor are located between the bag-taking mechanism and the food conveyor, and the food conveyor is provided with a bag-supporting mechanism. The bag-taking mechanism is capable of removing individual paper bags from a paper bag box, the bag-opening mechanism is capable of opening the paper bags, the bag-supporting mechanism is capable of supporting the opened paper bags, the food conveyor is capable of conveying food to the bag-supporting mechanism, and the paper bag conveyor is capable of conveying the paper bags after the food is placed in the paper bags.

[0006] The bag-removing mechanism includes a paper bag box and a paper bag hopper located on one side of the box. A paper pickup assembly and a paper bag tray are located within the box, and multiple conveying assemblies are arranged within the hopper. Paper bags can be stacked and placed in the box, with the paper bag tray providing support for the bags. The paper pickup assembly removes individual paper bags from the box and transfers them to the hopper. The conveying assembly transports the bags within the hopper and moves them to the bag-opening mechanism.

[0007] The bag opening mechanism includes a protective shell, a transmission assembly, and a bag opening assembly. The bag opening assembly is located within the protective shell and is in transmission connection with the bag opening assembly. The protective shell protects the bag opening assembly, and the transmission assembly drives the bag opening assembly to move horizontally, allowing the bag opening assembly to remove paper bags from the paper bag bin or transport them to the bag support mechanism. The bag opening assembly can also perform bag opening operations.

[0008] The bag-opening mechanism includes a bag-opening frame, a crank extrusion structure mounted on the frame, and a working disk. The working disk is equipped with multiple bag-opening structures, and the bag-opening frame is equipped with an intermittent rotary mechanism for driving the working disk. The crank extrusion structure cooperates with the bag-opening structures to enable the bag-opening structures to open the paper bags. The intermittent reloading mechanism drives the working disk to intermittently rotate, allowing the multiple bag-opening structures to sequentially complete the bag-opening operation.

[0009] Furthermore, the paper bag box has a movable door on one side and a paper bag compartment on the upper portion of the other side. The paper bag compartment is connected to the paper bag box, and the paper bag box is also provided with a square hole. Paper bags can be placed in the paper bag box through the door, and the paper bag compartment serves as a conveying channel for conveying paper bags to the bag opening mechanism.

[0010] Furthermore, the bag-retrieving mechanism also includes a support frame and a tray drive assembly mounted on the support frame. The tray drive assembly includes a lifting motor, a ball screw 1, and a lifting plate. The lifting motor is mounted at the bottom of the support frame. The ball screw 1 is rotationally connected to the support frame. One end of the lifting plate is transmission-connected to the ball screw 1. The other end of the lifting plate extends through the square hole into the paper bag box and is connected to the paper bag tray. The tray drive assembly can drive the paper bag tray to move up and down within the paper bag box, so that the paper bag tray can drive the paper bag to move up and down, thereby ensuring that the paper rubbing assembly can rub the paper bag out of the paper bag box.

[0011] Furthermore, the pickup assembly is located above the paper bag tray and includes a pickup shaft and a pickup roller. The pickup shaft is rotatably mounted within the paper bag box, with multiple pickup rollers spaced apart on the shaft. The conveying assembly includes a rotating shaft and a rubber sleeve. The rotating shaft is rotatably mounted within the paper bag bin, with the rubber sleeve mounted on the rotating shaft. A drive structure is provided on the rear side of the paper bag bin for driving the pickup shaft and the rotating shaft to rotate. The drive structure drives the pickup shaft and the rotating shaft to rotate, allowing the pickup roller to pull the paper bag out of the paper bag box, and the rubber sleeve facilitates conveyance of the paper bag within the paper bag bin.

[0012] Furthermore, the transmission assembly includes a drive motor, a second ball screw, and a transmission belt. A bracket is provided at the bottom of the protective housing, the drive motor is provided at the top of the bracket, and a driving pulley is provided at the output end of the drive motor. The second ball screw is rotatably provided inside the protective housing. One end of the second ball screw extends outside the protective housing and is connected to a driven pulley. The transmission belt is sleeved on the driving pulley and the driven pulley. The drive motor drives the second ball screw to rotate through the cooperation of the transmission belt with the driving pulley and the driven pulley.

[0013] Furthermore, a nut seat is drivingly connected to the second ball screw, a slide rail is provided on the inner side wall of the protective shell, and a slider corresponding to the slide rail is provided on the inner side of the nut seat, and the slider is slidably mounted on the slide rail. When the second ball screw rotates, the nut seat can move left and right on the second ball screw; the left and right lateral movement of the nut seat is achieved by the cooperation of the slider and the slide rail.

[0014] Furthermore, the bag opening assembly includes a fixed plate and an opening and closing plate. The fixed plate is fixedly arranged on the outside of the nut seat, and two opening and closing plates are slidably arranged on the outside of the fixed plate. One end of the opening and closing plate is connected to a sliding plate, and the other end is provided with a vacuum suction cup. A slide groove is provided on the outside of the fixed plate, and the sliding plate is slidably arranged in the slide groove. Both opening and closing plates are transmission-connected to a ball screw 3, and the two ball screws 3 are connected by a coupling. An opening and closing motor is provided on the top of the bracket top plate, and the output end of the opening and closing motor is connected to the ball screw 3. The opening and closing motor drives the ball screw 3 to rotate, which can move the two opening and closing plates closer to or farther away from each other. When the two opening and closing plates move away from each other, the vacuum suction cup can open the paper bag.

[0015] Furthermore, the bag-supporting structure includes two symmetrically arranged bag-supporting assemblies. The working disk is provided with a food bag inlet hole, and mounting holes are symmetrically provided on either side of the food bag inlet hole. The bag-supporting assemblies are disposed within the mounting holes and include inner and outer support pieces. The inner support piece is fixedly disposed within the mounting hole, and one end of the outer support piece, located within the mounting hole, is provided with a plurality of compression springs connected to the working disk. By inserting the bag-supporting assembly into a paper bag to prop up the paper bag, food can be easily inserted into the paper bag through the food bag inlet hole.

[0016] Furthermore, the crank extrusion structure includes a crank assembly and an extrusion assembly, a positioning plate is provided on the top of the bag opening frame, and two crank assemblies are symmetrically provided on the top of the positioning plate, the crank assembly includes an L-shaped seat, a crank wheel, a connecting rod and a push rod, the crank wheel is rotatably provided on the inner side of the vertical portion of the L-shaped seat, one end of the connecting rod is rotatably connected to the crank wheel, and the other end is rotatably connected to a sliding block; a positioning block is fixedly provided on the inner side of the vertical portion of the L-shaped seat, one end of the push rod is connected to the sliding block, and the other end is connected to a push rod connecting plate, and the push rod is slidably connected to the positioning block; the extrusion assembly includes a connecting plate and a support block, the connecting plate is fixedly provided on the push rod connecting plate, and the support blocks are provided at both ends of the connecting plate, and the support blocks correspond to the mounting holes. The crank assembly can drive the extrusion assembly to perform lateral reciprocating motion, so that the support block is inserted into or removed from between the inner support piece and the outer support piece, so that the outer support pieces of the two bag-opening assemblies are close to or away from each other, thereby facilitating the outer support piece to be inserted into the paper bag to support the paper bag.

[0017] Furthermore, the intermittent rotation mechanism includes a rotary motor, a driving wheel, and a driven wheel. A rotating shaft is provided at the center of one side of the working disk, which is rotatably connected to the bag opening frame. The driven wheel is fixedly mounted on the rotating shaft and has multiple half-notches. The rotary motor is mounted on the bag opening frame, and the output end of the rotary motor is connected to the driving wheel. The driving wheel has multiple bolts that engage with the half-notches. The bolts on the driving wheel engage with the half-notches on the driven wheel to cause the working disk to intermittently rotate, causing the bag-opening structure on the working disk to perform bag-opening operations in sequence.

[0018] Through the above technical solution, the beneficial effects of the utility model are:

[0019] The utility model has a reasonable structure and good use effect. It is convenient to take out the paper bags stacked in the paper bag box individually and transport them to the bag opening mechanism. The bag opening mechanism is used to easily complete the bag opening operation of the paper bags, thereby facilitating the subsequent bag-opening operation. At the same time, it is also convenient to carry out the bag-opening operation on the paper bags after opening, so that food can be put into the paper bags, and it is also convenient to transport the food and the bagged food, which reduces the labor intensity of the staff, has high safety, and ensures the hygiene and safety of food.

[0020] The utility model discloses a bag-taking mechanism in which a paper bag box serves as a storage device for paper bags, and a paper bag bin serves as a conveying channel for transporting paper bags to a bag-opening mechanism. The driving structure drives the pickup wheel shaft and the rotating shaft to rotate, so that the pickup wheel can rub the paper bags out of the paper bag box, and the rubber sleeve can promote the transportation of the paper bags in the paper bag bin. The tray driving assembly drives the paper bag tray to perform lifting motion in the paper bag box, so that the paper bag tray can drive the paper bag to perform lifting motion, thereby ensuring that the pickup wheel of the pickup assembly contacts the paper bag and rubs the paper bag out of the paper bag box.

[0021] The transmission assembly of the bag opening mechanism of the utility model can drive the bag opening assembly to move horizontally to the left and right, so that the bag opening assembly can take the paper bag from the paper bag bin or transport the paper bag to the bag supporting mechanism; wherein the ball screw is driven by the opening and closing motor to rotate, so that the two opening and closing plates can be moved closer to or away from each other, so that the paper bag is clamped from the paper bag bin and the bag mouth of the paper bag is opened by the action of the vacuum suction cup.

[0022] The crank assembly of the crank extrusion structure of the bag-opening mechanism of the present invention can drive the extrusion assembly to perform lateral reciprocating motion, so that the expansion block of the extrusion assembly is inserted into or removed from between the inner expansion piece and the outer expansion piece, so that the outer expansion pieces of the two bag-opening assemblies are close to or away from each other, thereby facilitating the insertion of the outer expansion piece into the paper bag and the expansion of the paper bag, thereby facilitating the packaging of food in the paper bag.

[0023] The bolts on the driving wheel of the intermittent rotary mechanism of the utility model cooperate with the half notches on the driven wheel to make the working disc do intermittent rotary motion, so as to achieve the effect that the bag supporting structure on the working disc performs bag supporting operation in sequence. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of a food packaging paper bag opening device of the utility model;

[0025] Figure 2 This is a structural diagram of the bag taking mechanism of the utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the bag opening mechanism of the utility model Figure 1 ;

[0027] Figure 4 This is a schematic diagram of the structure of the bag opening mechanism of the utility model Figure 2 ;

[0028] Figure 5 This is a structural diagram of the bag-supporting mechanism of the utility model;

[0029] Figure 6 This is a structural diagram of the crank extrusion structure of the utility model;

[0030] Figure 7 This is a schematic diagram of the structure of the working disk of the utility model Figure 1 ;

[0031] Figure 8 This is a schematic diagram of the structure of the working disk of the utility model Figure 2 ;

[0032] Figure 9 It is a structural schematic diagram of the driving wheel and the driven wheel of the utility model.

[0033] The numbers in the accompanying drawings are: 1 is a support frame, 2 is a paper bag box, 3 is a box door, 4 is a square hole, 5 is a ball screw 1, 6 is a lifting plate, 7 is a paper bag tray, 8 is a pickup wheel shaft, 9 is a pickup wheel, 10 is a paper bag bin, 11 is a rotating shaft, 12 is a rubber sleeve, 13 is a bracket, 14 is a protective shell, 15 is a slide rail, 16 is a ball screw 2, 17 is a driven pulley, 18 is a transmission belt, 19 is a nut seat, 20 is a slider, 21 is a fixed plate, 22 is an opening and closing plate, 23 is a sliding plate, 24 is a ball screw 3, 25 is a vacuum suction cup, 26 is a paper bag conveyor, 27 is a food conveyor, 28 is a bag opening frame, 29 is a working plate, 30 is a food bag inlet hole, 31 is an inner support piece, 32 is an outer support piece, 33 is a compression spring, 34 is a rotating shaft, 35 is a driven wheel, 36 is a half notch, 37 is a driving wheel, 38 is a bolt, 39 is a positioning plate, 40 is an L-shaped seat, 41 is a crank wheel, 42 is a connecting rod, 43 is a sliding block, 44 is a positioning block, 45 is a push rod, 46 is a push rod connecting plate, 47 is a connecting plate, and 48 is a support block. DETAILED DESCRIPTION

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0035] like Figures 1 to 9 As shown, a food packaging paper bag opening device includes a bag taking mechanism, a bag opening mechanism, a paper bag conveyor 26, and a food conveyor 27. The bag opening mechanism and paper bag conveyor 26 are located between the bag taking mechanism and the food conveyor 27. The food conveyor 27 is provided with a bag-supporting mechanism. In this embodiment, the bag taking mechanism can remove individual stacked paper bags and convey them to the bag opening mechanism. The bag opening mechanism grips and opens the paper bags conveyed from the bag taking mechanism and conveys the opened bags to the bag-supporting mechanism, which supports the opened bags. The food conveyor 27 is used to convey food. A food pushing mechanism can also be installed on the food conveyor 27. The food pushing mechanism includes a pushing element and a push plate. The push plate is mounted on the telescopic end of the pushing element. The pushing element can be an electric push rod, an air cylinder, or an oil cylinder. The pushing element pushes the food conveyed on the food conveyor 27 into the supported paper bag. The paper bag conveyor 26 can continue to convey the filled paper bag forward to the next process.

[0036] The bag-taking mechanism includes a paper bag box 2 and a paper bag bin 10 disposed on one side of the paper bag box 2. The paper bag box 2 is internally provided with a paper rubbing assembly and a paper bag tray 7. The paper bag bin 10 is internally provided with multiple conveying assemblies. In this embodiment, the paper bag box 2 and the paper bag bin 10 are both sheet metal parts, and the paper bag bin 10 is fixedly mounted on the paper bag box 2. The paper bags need to be manually placed into the paper bag bin 10. When placing the paper bags into the paper bag box 2, if necessary, they need to be aligned, but the bag mouth of the paper bag needs to face forward. The distance between the lowest bag placement position of the paper bag box 2 and its bag discharge position exceeds 450mm. Based on the thickness of each paper bag of 0.8±0.2mm, a maximum of 500 paper bags can be placed in the paper bag box 2 at one time. The paper bag box 2 has a large space to accommodate paper bags of different specifications. It can accommodate paper bags of any size within the range of length and width not exceeding 440mm. At the same time, the number of conveying assemblies inside the paper bag bin 10 is two.

[0037] The bag opening mechanism includes a protective shell 14, a transmission assembly, and a bag opening assembly. The bag opening assembly is located within the protective shell 14 and is connected to the bag opening assembly through a transmission mechanism. In this embodiment, the protective shell 14 protects the bag opening assembly, and the transmission assembly drives the bag opening assembly to move back and forth, allowing the bag opening assembly to grasp a paper bag at the paper bag hopper 10 and convey the paper bag to the bag opening mechanism. The movement of the bag opening assembly from the paper bag hopper 10 to the bag opening mechanism opens the bag opening.

[0038] The bag-opening mechanism includes a bag-opening frame 28, a crank extrusion structure mounted on the frame 28, and a working disk 29. The working disk 29 is provided with multiple bag-opening structures, and the frame 28 is provided with an intermittent rotary mechanism for driving the working disk 29. In this embodiment, the working disk 29 has four bag-opening structures, each of which supports an open paper bag, facilitating the placement of food inside the bag. The intermittent rotary mechanism drives the working disk 29 in intermittent rotation, allowing the four bag-opening structures to sequentially complete the bag-opening operation, thereby improving work efficiency.

[0039] The paper bag box 2 is provided with a door 3 movably mounted on one side and a paper bag compartment 10 disposed on the upper portion of the other side. The paper bag compartment 10 is connected to the paper bag box 2. The paper bag box 2 is also provided with a square hole 4. In this embodiment, the door 3 is connected to the paper bag box 2 via a hinge. The door 3 facilitates the placement of paper bags into the paper bag box 2. The paper bag box 2 and the door 3 also reduce contamination of the paper bags by dust, oil, and the like. The paper bag compartment 10 is connected to the paper bag box 2 to ensure that paper bags can be transferred from the paper bag box 2 to the paper bag compartment 10. The square hole 4 facilitates the extension of the lifting plate 4 into the interior of the paper bag box 2 to connect with the paper bag tray 7.

[0040] The bag-taking mechanism also includes a support frame 1 and a tray drive assembly arranged on the support frame 1. The tray drive assembly includes a lifting motor, a ball screw 5 and a lifting plate 6. The lifting motor is arranged at the bottom of the support frame 1, and the ball screw 5 is rotatably connected to the support frame 1. One end of the lifting plate 6 is transmission-connected to the ball screw 5, and the other end of the lifting plate 6 extends through the square hole 4 to the interior of the paper bag box 2 and is connected to the paper bag tray 7. In this embodiment, the support frame 1 supports the paper bag box 2 and is used to install the tray drive assembly. The ball screw 5 is rotatably connected to the top plate of the support frame 1 through a bearing. The ball screw 5 is vertically installed on the support frame 1, and the output end of the lifting motor is connected to the ball screw 5 through a coupling; when the lifting motor is turned on, the output end of the lifting motor drives the ball screw 5 to rotate, and the lifting plate 6 performs an upward movement on the ball screw 5. The lifting plate 6 drives the paper bag tray 7 to perform an upward movement, thereby causing the paper bag tray 7 to drive the paper bag to perform an upward movement, ensuring that the paper bags are removed from the paper bag box 2 individually under the action of the paper pickup assembly paper roller 9.

[0041] The paper pickup assembly is located above the paper bag tray 7, and the paper pickup assembly includes a paper pickup wheel shaft 8 and a paper pickup wheel 9. The paper pickup wheel shaft 8 is rotatably arranged inside the paper bag box 2, and multiple paper pickup wheels 9 are arranged at intervals on the paper pickup wheel shaft 8; the conveying assembly includes a rotating shaft 11 and a rubber sleeve 12, and the rotating shaft 11 is rotatably arranged inside the paper bag bin 10, and the rubber sleeve 12 is sleeved on the rotating shaft 11; the rear side of the paper bag box 2 is provided with a driving structure for driving the paper pickup wheel shaft 8 and the rotating shaft 11 to rotate. In this embodiment, both ends of the pickup roller shaft 8 are rotatably connected to the paper bag box 2 through bearings, one end of the pickup roller shaft 8 extends to the outside of the paper bag box 2 and is connected to a transmission pulley. There are two pickup rollers 9 on the pickup roller shaft 8, and the pickup roller 9 is made of rubber material. The pickup roller 9 is not a regular circle, but a triangular structure with an arc; both ends of the rotating shaft 11 are rotatably connected to the paper bag bin 10 through bearings, and one end of the rotating shaft 11 extends to the outside of the paper bag bin and is also connected to a transmission pulley; the driving structure includes a motor and a belt, and the output end of the motor is connected to a pulley, which is sleeved on the pulley, the rotating shaft 11 and the transmission pulley at the end of the pickup roller shaft 8. When the motor is turned on, the pickup roller shaft 8 and the rotating shaft 11 can rotate synchronously through the cooperation of the belt, the pulley and the transmission pulley, so that the pickup roller 9 rotates to move the paper bags out of the paper bag box 2 individually and send them to the paper bag bin 10. The rotating shaft 11 conveys the paper bags forward in the paper bag bin 10 through the rubber sleeve 12.

[0042] The transmission assembly includes a drive motor, a second ball screw 16, and a transmission belt 18. A bracket 13 is provided at the bottom of the protective shell 14, and the drive motor is provided at the top of the bracket 13. A driving pulley is provided at the output end of the drive motor. The second ball screw 16 is rotatably disposed inside the protective shell 14. One end of the second ball screw 16 extends to the outside of the protective shell 14 and is connected to a driven pulley 17. The transmission belt 18 is sleeved on the driving pulley and the driven pulley 17. In this embodiment, the bracket 13 supports the bag opening mechanism. Both ends of the second ball screw 16 are rotatably connected to the protective shell 14 via bearings. When the drive motor is turned on, the output end of the drive motor drives the driving pulley to rotate. The driving pulley drives the driven pulley 17 to rotate via the transmission belt 18. The driven pulley 17 then drives the second ball screw 16 to rotate.

[0043] The ball screw 16 is connected to a nut seat 19 in a transmission manner. The inner side wall of the protective shell 14 is provided with a slide rail 15. The inner side of the nut seat 19 is provided with a slider 20 corresponding to the slide rail 15. The slider 20 is slidably mounted on the slide rail 15. In this embodiment, there are two slide rails 15 on the inner side wall of the protective shell 14. Two groups of sliders 20 are mounted on the nut seat 10, each group including two sliders 20. During the rotation of the ball screw 16, the nut seat 10 performs left and right lateral movement on the ball screw 16, and the slider 20 slides on the slide rail 15 to facilitate the movement of the nut seat 10. The nut seat 10 drives the bag opening assembly to perform left and right lateral reciprocating motion, so that the bag opening assembly clamps the paper bag and opens the bag mouth during the process of conveying the paper bag to the bag-stretching mechanism.

[0044] The bag opening assembly includes a fixed plate 21 and an opening and closing plate 22. The fixed plate 21 is fixedly arranged on the outer side of the nut seat 19, and two opening and closing plates 22 are slidably arranged on the outer side of the fixed plate 21; one end of the opening and closing plate 22 is connected to a sliding plate 23, and the other end is provided with a vacuum suction cup 25. A slide groove is provided on the outer side of the fixed plate 21, and the sliding plate 23 is slidably arranged in the slide groove; both of the opening and closing plates 22 are transmission-connected with ball screw three 24, and the two ball screws three 24 are connected by a coupling. An opening and closing motor is provided on the top of the top plate of the bracket 13, and the output end of the opening and closing motor is connected to the ball screw three 24. In this embodiment, the sliding plate 23 cooperates with the slide groove to allow the opening and closing plate 22 to perform lifting and lowering movements. There are two vacuum suction cups 25 at the ends of the opening and closing plate 22; the opening and closing motor can move following the fixed plate 19, and the opening and closing motor is turned on. The output end of the opening and closing motor drives the ball screw three 24 to rotate, so that the two opening and closing plates 22 approach each other or move away from each other. When the two opening and closing plates 22 approach each other, the vacuum suction cups 25 at the ends of the two opening and closing plates 22 will clamp the paper bag at a position close to the paper bag bin 10. After clamping the paper bag, the bag opening assembly moves in a direction away from the paper bag bin 10, and the two opening and closing plates 22 move away from each other so that the vacuum suction cups 25 at the ends of the two opening and closing plates 22 move away from each other, so as to open the bag mouth of the paper bag.

[0045] The bag-supporting structure includes two symmetrically arranged bag-supporting assemblies. A food bag inlet hole 30 is defined on the working disk 29, and mounting holes are defined symmetrically on either side of the food bag inlet hole 30. The bag-supporting assemblies are disposed within the mounting holes and include an inner support piece 31 and an outer support piece 32. The inner support piece 31 is fixedly disposed within the mounting hole. One end of the outer support piece 32, located within the mounting hole, is provided with a plurality of compression springs 33, which are connected to the working disk 29. In this embodiment, the two bag-supporting assemblies of the bag-supporting structure can prop up an opened paper bag so that food can be conveyed into the paper bag through the food bag inlet 30 via a pushing element. The outer support piece 32 has three springs, and its end is trapezoidal in shape, so that the outer support piece 32 can be inserted into the paper bag to prop it up.

[0046] The crank extrusion structure includes a crank assembly and an extrusion assembly. A positioning plate 39 is provided on the top of the bag opening frame 28. Two crank assemblies are symmetrically provided on the top of the positioning plate 39. The crank assembly includes an L-shaped seat 40, a crank wheel 41, a connecting rod 42 and a push rod 45. The crank wheel 41 is rotatably arranged on the inner side of the vertical part of the L-shaped seat 40. One end of the connecting rod 42 is rotatably connected to the crank wheel 41, and the other end is rotatably connected to the sliding block 43; a positioning block 44 is fixedly provided on the inner side of the vertical part of the L-shaped seat 40, one end of the push rod 45 is connected to the sliding block 43, and the other end is connected to the push rod connecting plate 46, and the push rod 45 is slidably connected to the positioning block 44; the extrusion assembly includes a connecting plate 47 and a support block 48. The connecting plate 47 is fixedly provided on the push rod connecting plate 46, and the support blocks 48 are provided at both ends of the connecting plate 47, and the support blocks 48 correspond to the mounting holes. In this embodiment, by adjusting the position of the positioning plate 30 on the bag opening frame 28, the position of the crank assembly and the extrusion assembly can be adjusted, thereby adjusting the length of the expansion block 46 inserted between the inner expansion piece 31 and the outer expansion piece 32; one of the L-shaped seats 40 is equipped with a crank motor, the output end of the crank motor is connected to a crank shaft, and the crank shaft is connected to the crank wheels 41 of the two crank assemblies, so that the two crank assemblies move synchronously; the two crank assemblies drive the extrusion assembly to perform lateral reciprocating motion, so that the expansion block 48 of the extrusion assembly can be inserted into or out of the inner expansion piece Between the opening piece 31 and the outer opening piece 32, when the opening block 48 is inserted between the inner opening piece 31 and the outer opening piece 32, the distance between the two outer opening pieces 32 becomes smaller, so that the two outer opening pieces 32 can be inserted into the paper bag; when the opening block 48 leaves between the inner opening piece 31 and the outer opening piece 32, the distance between the two outer opening pieces 32 becomes larger, so that the two outer opening pieces 32 can support the paper bag; wherein two opening blocks 48 are installed at both ends of the connecting plate 47, and the ends of the opening blocks 48 are sharp structures so that the opening blocks 48 can be inserted between the inner opening piece 31 and the outer opening piece 32.

[0047] The intermittent rotation mechanism includes a rotary motor, a driving wheel 37 and a driven wheel 35. A rotating shaft 34 is provided at the center position of one side of the working disk 29. The rotating shaft 34 is rotatably connected to the bag opening frame 28. The driven wheel 35 is fixedly sleeved on the rotating shaft 34. A plurality of half-slots 36 are arranged on the driven wheel 35. The rotary motor is arranged on the bag opening frame 28. The output end of the rotary motor is connected to the driving wheel 37. A plurality of bolts 38 that cooperate with the half-slots 36 are arranged on the driving wheel 37. In this embodiment, there are four bolts 38 on the driving wheel 37 and four half-slots 36 on the driven wheel 35. When the rotary motor drives the driving wheel 37 to rotate, the bolts 38 on the driving wheel 37 cooperate with the half-slots 36 on the driven wheel 35, so that the driven wheel 35 drives the rotating shaft 34 and the working disk 29 to perform intermittent rotational motion. When the bolts 38 on the driving wheel 37 contact the half-slots 36 on the driven wheel 35, the driven wheel 35 starts to rotate around its own rotation center through the rotating shaft 34, and stops rotating after the bolts 38 leave. The angle of each rotation is 90°, thereby driving the working disk 29 to rotate 90° each time.

[0048] The working principle of the present utility model is as follows: first, the staff opens the box door 3 of the paper bag box 2 and stacks the paper bags on the paper bag tray 7; turns on the lifting motor, and the output end of the lifting motor drives the ball screw 5 to rotate, and the lifting plate 6 performs an upward movement on the ball screw 5, and the lifting plate 6 drives the paper bag tray 7 to perform an upward movement, and the paper bag tray 7 drives the paper bags to perform an upward movement; turns on the motor of the driving structure, and the output end of the motor drives the pulley to rotate, even if the pickup wheel shaft 8 and the rotating shaft 11 rotate synchronously, the pickup wheel 9 rotates to remove the paper bags individually from the paper bag box 2 and send them to the paper bag bin 10, and the rotating shaft 11 transports the paper bags forward in the paper bag bin 10 through the rubber sleeve 12, completing the bag-taking operation of the paper bags.

[0049] The driving motor is turned on, and the output end of the driving motor drives the active pulley to rotate. The active pulley drives the driven pulley 17 to rotate through the transmission belt 18, and the driven pulley 17 drives the ball screw 2 16 to rotate. The nut seat 10 performs reciprocating transverse motion on the ball screw 2 16, and the slider 20 slides on the slide rail 15. The opening and closing motor is turned on, and the output end of the opening and closing motor drives the ball screw 3 24 to rotate. The two opening and closing plates 22 approach each other and follow the fixed plate 19 to move toward the paper bag warehouse 10. The vacuum suction cups 25 on the two opening and closing plates 22 will move to a position close to the paper bag warehouse 10 to close and clamp the paper bag, and then the two opening and closing plates 22 move in the direction away from the paper bag warehouse 10, and the two opening and closing plates 22 move away from each other so that the vacuum suction cups 25 at the ends of the two opening and closing plates 22 move away, so as to open the bag mouth of the paper bag and complete the bag opening operation of the paper bag.

[0050] When the paper bag moves in the direction away from the paper bag bin 10, the crank motor is turned on, and the output end of the crank motor drives the crank shaft to rotate, and the crank shaft drives the crank wheels 41 of the two crank assemblies to rotate, and the crank wheels 41 make the push rod 45 move forward through the connecting rod 42 and the sliding rod 43, and the two push rods 45 push the push rod connecting plate 46 and the connecting plate 47 to move forward, and the connecting plate 47 drives the expansion block 48 to move forward, and the two groups of expansion blocks 48 are respectively inserted between the inner expansion piece 31 and the outer expansion piece 32 of the two expansion assemblies, and the compression spring 33 is compressed, and the two outer expansion pieces are opened. The spacing between the pieces 32 becomes smaller, and then the paper bag is put on the two outer support pieces 32; then the crank wheel 41 uses the connecting rod 42 and the sliding rod 43 to make the push rod 45 move backward, and the two push rods 45 push the push rod connecting plate 46 and the connecting plate 47 to move backward, and the connecting plate 47 drives the support block 48 to move backward. The two groups of support blocks 48 respectively leave the inner support pieces 31 and the outer support pieces 32 of the two support components, and the spacing between the two outer support pieces 32 becomes larger. The two outer support pieces 32 support the paper bag, completing the bag-supporting operation of the uppermost bag-supporting structure.

[0051] Then the rotary motor is turned on, and the rotary motor drives the driving wheel 37 to rotate. The bolt 38 on the driving wheel 37 contacts the half notch 36 on the driven wheel 35, and the driven wheel 35 starts to rotate around its own rotation center through the rotating shaft 34. The rotation stops after the bolt 38 is released, and the driven wheel 35 rotates 90°. The driven wheel 35 drives the working disk 29 to rotate 90° through the rotating shaft 34, and then the bag-holding operation of the next bag-holding structure is carried out.

[0052] When the paper bag reaches the bottom of the work plate 29, the food conveyed on the food conveyor 27 can be pushed into the inflated paper bag by the pushing element on the food conveyor. Then the paper bag can be removed from the two outer support pieces 32, and the paper bag filled with food can be continuously conveyed forward by the paper bag conveyor 26 to the next process.

[0053] The embodiments described above are only preferred embodiments of the utility model and do not limit the scope of implementation of the utility model. Therefore, any equivalent changes or modifications made according to the technical solutions described in the patent scope of the utility model should be included in the scope of the patent application of the utility model.

Claims

1. A food packaging paper bag opening device, characterized in that: It comprises a bag taking mechanism, a bag opening mechanism, a paper bag conveyor (26) and a food conveyor (27), wherein the bag opening mechanism and the paper bag conveyor (26) are located between the bag taking mechanism and the food conveyor (27), and the food conveyor (27) is provided with a bag supporting mechanism; The bag-taking mechanism comprises a paper bag box (2) and a paper bag bin (10) arranged on one side of the paper bag box (2); a paper rubbing assembly and a paper bag tray (7) are arranged inside the paper bag box (2); and a plurality of conveying assemblies are arranged inside the paper bag bin (10); The bag opening mechanism comprises a protective shell (14), a transmission assembly and a bag opening assembly, wherein the bag opening assembly is located inside the protective shell (14), and the transmission assembly is connected to the bag opening assembly in a transmission manner; The bag-supporting mechanism comprises a bag-opening frame (28), a crank extrusion structure and a working disk (29) arranged on the bag-opening frame (28), a plurality of bag-supporting structures are arranged on the working disk (29), and an intermittent rotary mechanism for driving the working disk (29) to rotate is provided on the bag-opening frame (28).

2. A food packaging paper bag opening device according to claim 1, characterized in that: A box door (3) is movably provided on one side of the paper bag box (2), and the paper bag bin (10) is provided on the upper portion of the other side. The paper bag bin (10) is connected to the paper bag box (2), and a square hole (4) is also provided on the paper bag box (2).

3. A food packaging paper bag opening device according to claim 2, characterized in that: The bag-taking mechanism further comprises a support frame (1) and a tray drive assembly arranged on the support frame (1), the tray drive assembly comprising a lifting motor, a ball screw (5) and a lifting plate (6), the lifting motor being arranged at the bottom of the support frame (1), the ball screw (5) being rotatably connected to the support frame (1), one end of the lifting plate (6) being transmission-connected to the ball screw (5), and the other end of the lifting plate (6) extending through the square hole (4) to the interior of the paper bag box (2) and being connected to the paper bag tray (7).

4. A food packaging paper bag opening device according to claim 3, characterized in that: The paper pickup assembly is located above the paper bag tray (7), and comprises a paper pickup shaft (8) and a paper pickup wheel (9). The paper pickup shaft (8) is rotatably arranged inside the paper bag box (2), and a plurality of paper pickup wheels (9) are arranged at intervals on the paper pickup shaft (8); the conveying assembly comprises a rotating shaft (11) and a rubber sleeve (12), the rotating shaft (11) is rotatably arranged inside the paper bag bin (10), and the rubber sleeve (12) is sleeved on the rotating shaft (11); and a driving structure for driving the paper pickup shaft (8) and the rotating shaft (11) to rotate is provided on the rear side of the paper bag box (2).

5. The food packaging paper bag opening device according to claim 1, characterized in that: The transmission assembly includes a drive motor, a second ball screw (16) and a transmission belt (18); a bracket (13) is provided at the bottom of the protective shell (14); the drive motor is provided at the top of the bracket (13); a driving pulley is provided at the output end of the drive motor; the second ball screw (16) is rotatably provided inside the protective shell (14); one end of the second ball screw (16) extends to the outside of the protective shell (14) and is connected to a driven pulley (17); and the transmission belt (18) is sleeved on the driving pulley and the driven pulley (17).

6. The food packaging paper bag opening device according to claim 5, characterized in that: The ball screw 2 (16) is connected to a nut seat (19) for transmission, the inner wall of the protective shell (14) is provided with a slide rail (15), the inner side of the nut seat (19) is provided with a slider (20) corresponding to the slide rail (15), and the slider (20) is slidably arranged on the slide rail (15).

7. The food packaging paper bag opening device according to claim 6, characterized in that: The bag opening assembly includes a fixed plate (21) and an opening and closing plate (22), the fixed plate (21) is fixedly arranged on the outside of the nut seat (19), and two opening and closing plates (22) are slidably arranged on the outside of the fixed plate (21); one end of the opening and closing plate (22) is connected to a sliding plate (23), and the other end is provided with a vacuum suction cup (25), and a sliding groove is provided on the outside of the fixed plate (21), and the sliding plate (23) is slidably arranged in the sliding groove; the two opening and closing plates (22) are both transmission-connected with ball screw three (24), and the two ball screw three (24) are connected by a coupling, and an opening and closing motor is provided on the top of the top plate of the bracket (13), and the output end of the opening and closing motor is connected to the ball screw three (24).

8. The food packaging paper bag opening device according to claim 1, characterized in that: The bag-supporting structure comprises two symmetrically arranged bag-supporting assemblies, a food bag inlet hole (30) is provided on the working disk (29), and mounting holes are symmetrically provided on both sides of the food bag inlet hole (30); the bag-supporting assembly is arranged in the mounting hole, and the bag-supporting assembly comprises an inner opening piece (31) and an outer opening piece (32), the inner opening piece (31) is fixedly arranged in the mounting hole, and a plurality of compression springs (33) are arranged at one end of the outer opening piece (32) located in the mounting hole, and the compression springs (33) are connected to the working disk (29).

9. The food packaging paper bag opening device according to claim 8, characterized in that: The crank extrusion structure includes a crank assembly and an extrusion assembly. A positioning plate (39) is provided on the top of the bag opening frame (28). Two crank assemblies are symmetrically provided on the top of the positioning plate (39). The crank assembly includes an L-shaped seat (40), a crank wheel (41), a connecting rod (42) and a push rod (45). The crank wheel (41) is rotatably provided on the inner side of the vertical portion of the L-shaped seat (40). One end of the connecting rod (42) is rotatably connected to the crank wheel (41) and the other end is rotatably connected to a sliding block (43). A positioning block (44) is fixedly provided on the inner side of the vertical portion of the L-shaped seat (40); one end of the push rod (45) is connected to the sliding block (43) and the other end is connected to the push rod connecting plate (46); the push rod (45) is slidably connected to the positioning block (44); the extrusion assembly includes a connecting plate (47) and a support block (48); the connecting plate (47) is fixedly provided on the push rod connecting plate (46); the support blocks (48) are provided at both ends of the connecting plate (47); the support blocks (48) correspond to the mounting holes.

10. The food packaging paper bag opening device according to claim 8, characterized in that: The intermittent rotary mechanism comprises a rotary motor, a driving wheel (37) and a driven wheel (35); a rotating shaft (34) is provided at a central position on one side of the working disk (29); the rotating shaft (34) is rotatably connected to the bag opening frame (28); the driven wheel (35) is fixedly sleeved on the rotating shaft (34); and a plurality of half-notches (36) are arranged on the driven wheel (35); the rotary motor is arranged on the bag opening frame (28); the output end of the rotary motor is connected to the driving wheel (37); and a plurality of bolts (38) are arranged on the driving wheel (37) that match the half-notches (36).

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