Flexible freight bag sealing device and using method

Abstract

The invention provides a flexible freight bag sealing device and a using method to solve the problems that existing equipment can only sew a bottom bag, products are uneven due to different proficiency degrees of workers, and the efficiency of a manual sewing edge folding mode is low. Comprising a supporting frame arranged on the horizontal plane, the supporting frame comprises a fixed seat, a movable frame capable of moving up and down is arranged on the fixed seat, and the device further comprises a supporting unit, a negative pressure unit, a clamping unit, a sewing unit and other structures; through the arrangement of the supporting unit, the negative pressure unit, the clamping unit, the sewing unit, the supporting frame and the like, the clamping unit clamps a container bag with an upper opening and a lower opening in a vertical state, a worker adsorbs a bottom bag and a top cover to the negative pressure unit, and the sewing unit sews the top cover and the bottom bag of the container bag at the same time; and compared with a mode of only sewing the bottom bag, the mode is more efficient and faster, and the universality of the equipment is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of production equipment for bulk bags, and in particular to a bulk bag sealing device and a use method thereof. Background Art

[0002] Container bags are called flexible container bags, also known as big bags and ton bags. They are soft and flexible packaging containers. They are large-volume transport bags made of foldable rubber-coated cloth, resin-processed cloth and other soft materials. They are usually made of polypropylene or polyethylene as the main raw materials, and are made by extrusion into film, cutting, drawing, weaving, cutting and sewing.

[0003] The Chinese patent application number CN202210870673.7 discloses an automatic sewing device for the bottom and reinforcement block of a container bag, including several sewing machines and a fixed chassis, wherein the sewing machine is arranged on one side of the fixed chassis, a rotating gear box is arranged on the top surface of the fixed chassis, a tray fixing bracket is arranged on the top of the rotating gear box, several trays are arranged on the tray fixing bracket, a manipulator clamp is arranged above the tray, and a suction cup is arranged on the manipulator clamp, wherein the sewing machine is symmetrically distributed and can be selected to have two. During sewing, the suction cup sucks the bottom of the container bag and automatically places it on the tray, and the tray rotates to the sewing area under the drive of the rotating gear box, then the suction cup sucks the reinforcement block, automatically places it on the bottom of the container bag and presses it, and starts sewing. After sewing is completed, the sewing of the next group of container bag bottoms and reinforcement blocks will be set to be continuous or alternating as needed, thereby ensuring the continuity of multi-station continuous automatic sewing, effectively reducing labor input costs, and effectively improving work efficiency and sewing quality.

[0004] The Chinese patent with application number CN202310534483.2 discloses an automatic sewing device for the bag body and bag bottom of a container bag, a conveying mechanism, the conveying mechanism includes a circular track, a plurality of tensioning and clamping devices movably arranged on the circular track, and a shifting mechanism. A loading station, an ultrasonic fixing station, a first folding and sewing station, a second folding and sewing station, a third folding and sewing station, and a unloading station are arranged around the circular track; the ultrasonic fixing station includes a first support frame, a bag bottom tightening mechanism and an ultrasonic fixing mechanism arranged on the first support frame; the first folding and sewing station, the second folding and sewing station, and the third folding and sewing station all include a second support frame, a folding mechanism and a sewing mechanism arranged on the second support frame, which realizes the automation of container bag positioning, container bag conveying, ultrasonic fixing, stitching edge folding and sewing, which can reduce manpower input, reduce labor costs, ensure the stability of product processing quality, and effectively improve production efficiency.

[0005] The existing automatic sewing equipment for bulk bags still has the following problems: 1. Since some bulk bags have not only a bottom but also a top cover on top, and a cylindrical feed port is provided on the top cover, the existing bulk bag sewing equipment can only sew the bottom of the bag, and the top cover needs to be sewn manually, which is very troublesome.

[0006] 2. When sewing manually, due to the different proficiency of workers, the top cover, bag bottom and container bag edge are often too tilted during sewing, resulting in a high defective rate of products.

[0007] 3. When existing equipment sews the bottom or top cover of the bag, it needs to be done twice. After sewing one side, it needs to be turned over. At the same time, some equipment does not have the effect of automatic folding. Workers are required to manually align the bottom bag and the top cover with the edge of the container bag for folding, which is not only very troublesome, but also reduces the production efficiency of the container bag. Summary of the invention

[0008] In view of the above problems, the present invention provides a container bag sealing device and a method for using the same, which has the advantages of simultaneously sewing the bottom bag and the top cover, low product defect rate and no need for manual folding.

[0009] The technical solution is as follows: the present invention comprises: A support frame placed on a horizontal plane, the support frame comprising a fixed seat, and a movable frame movable up and down is arranged on the fixed seat; Support units, the number of the support units is two and they are symmetrically distributed up and down, the two support units are fixed on the fixed seat and the movable frame respectively, a container bag with upper and lower openings is arranged between the two support units, the cross section of the container bag is square and the four sides along the length direction are sewn to form seams; Negative pressure unit, the number of the negative pressure units is two groups, each group has four negative pressure units symmetrically distributed at the four corners of the container bag, and a sealing cloth is adsorbed on the negative pressure unit, and the sealing cloth is a top cover or a bottom bag; A clamping unit, wherein the clamping units are divided into four groups, each group has two clamping units symmetrically distributed up and down, and the four groups of clamping units are clamped on four seam edges respectively, the clamping unit comprises two symmetrically distributed clamping boxes, a plurality of equally distributed rollers are arranged in the clamping boxes, the rollers slide in the clamping boxes, a movable plate is arranged on the clamping box, the movable plate is rotatably connected with the plurality of rollers, the movable plate is connected to the clamping box through a spring, the two clamping boxes are connected with the same mounting frame, both ends of the mounting frame are fixed with a cylinder body, a first piston rod is slidably connected in the cylinder body, one end of the first piston rod is fixedly connected with the movable plate, and the cylinder body is externally connected to a pressure supply device; The sewing unit is two in number and symmetrical in the upper and lower parts. The sewing unit comprises a rounded rectangular track, a movable frame is arranged on the track, a walking wheel matching the track is arranged at one end of the movable frame, a mounting plate is fixed at the other end of the movable frame, a sewing machine is fixed on the mounting plate, and the sealing cloth is connected to the container bag by sewing.

[0010] The supporting unit comprises a shell, a disc is fixed in the shell, a large cross is fixed on the side of the disc close to the container bag, a small cross located between the disc and the large cross is rotatably connected to the disc, four circumferentially evenly distributed slide grooves are provided in the large cross, sliders are slidably connected in the four slide grooves, a telescopic arm is fixed to one end of the slider, the pre-positioning unit and the negative pressure unit are mounted on the telescopic arm, a connecting rod is rotatably connected to the other end of the slider, one end of the connecting rod is rotatably connected to the small cross, a connecting groove is provided at the outer edge of the disc in a circumferential direction, a limiting column is arranged at the connection between the small cross and the connecting rod, the limiting column slides in the connecting groove, a rotating shaft penetrating the disc is fixed at the axis center of the small cross, and an adjusting motor is connected to the end of the rotating shaft away from the small cross.

[0011] The movable frame includes a fixed cylinder, a sliding rod is slidably connected inside the fixed cylinder, one end of the sliding rod is fixedly connected to the mounting plate, a screw rod penetrating the fixed cylinder is fixed on the sliding rod, a handle is fixed on the end of the screw rod away from the sliding rod, the sewing machine is an automatic sewing machine, and a winding drum is arranged on one side of the sewing machine.

[0012] The negative pressure unit includes a fixed tube, in which a negative pressure tube that slides up and down is arranged, a piston plate is coaxially sleeved on the negative pressure tube, an L-shaped tube is connected to the side of the negative pressure tube close to the container bag, a plurality of equally spaced air holes are opened on the side of the L-shaped tube close to the container bag and a sealing cloth is adsorbed thereon, and the negative pressure tube is externally connected to a negative pressure device.

[0013] It also includes two folding units, which are fixed on the mounting plate and located on one side of the sewing machine's travel path; The folding unit comprises a U-shaped frame fixed on the mounting plate, one side of the U-shaped frame is located between the container bag and the sealing cloth, a vertical connecting roller is arranged in the U-shaped frame, a threaded convex strip is arranged on the surface of the connecting roller, the connecting roller is externally connected to a power device, and an infrared sensor is arranged on the side of the U-shaped frame close to the sewing machine; A support plate is fixed to the side of the U-shaped frame close to the sewing machine, and a horizontal connecting tube is fixed to the end of the support plate away from the U-shaped frame. Moving grooves are opened on both sides of the bottom of the connecting tube. A sliding clamp is arranged in the connecting tube, and the clamp is connected to the connecting tube by a spring.

[0014] It also includes pre-positioning units, which are divided into two groups, each group having four positioning units and respectively located at the four corners of the supporting unit, for pre-positioning the container bag; The pre-positioning unit comprises a hydraulic cylinder fixed on the telescopic arm, a second piston rod is arranged in the hydraulic cylinder, a positioning rod is fixed on the second piston rod, and the hydraulic cylinder is externally connected to a pressure supply device.

[0015] A fixing plate is provided on both sides of the fixed seat, and a threaded rod is rotatably connected to the fixing plate. Two left-right symmetrical first connecting frames and second connecting frames are respectively fixed to the fixed seat and the movable frame, and the first connecting frame and the second connecting frame are fixed to the corresponding rails. A threaded cylinder matching the threaded rod is fixed to the second connecting frame, and a lifting motor located on one side of the threaded rod is fixed to the fixing plate, and the lifting motor is connected to the threaded rod.

[0016] The two mounting frames symmetrically distributed up and down are connected with the same telescopic rod, the same telescopic plate is arranged between the telescopic rods symmetrically distributed front and back, an electric push rod is fixed in the middle of the telescopic plate, and the electric push rod is fixedly connected to the first connecting frame; Four connecting plates evenly distributed around the circumference are fixed on the fixing seat, a telescopic sleeve rod is fixed on the connecting plate, the axis of the telescopic sleeve rod is consistent with the diagonal of the container bag, one end of the telescopic sleeve rod is fixedly connected to the mounting frame, a limiting groove is provided at the bottom of the second connecting frame, a T-shaped rod sliding left and right is provided in the limiting groove, T-shaped grooves are provided on both sides of the T-shaped rod, a connecting rod is slidably connected in the T-shaped groove, and one end of the connecting rod away from the T-shaped rod is sleeved with the telescopic rod.

[0017] The two ends of the L-shaped tube are respectively slidably connected with branch tubes, the branch tubes are communicated with the L-shaped tube, a plurality of equally distributed circular holes are opened at the bottom of the branch tubes, and the branch tubes are connected with the L-shaped tube via springs.

[0018] A method for using a container bag sealing device comprises the following steps: Step 1: The worker places the container bag with upper and lower openings between two support units, with the four corners mounted on the pre-positioning unit. The support unit expands to open the container bag, and simply adjusts the container bag to ensure that the four corners are consistent with the four corners of the pre-positioning unit; Step 2: The electric push rod is started, the clamping unit is close to the four seams of the container bag, the pressure supply device connected to the cylinder body is started, and the clamping unit clamps the seams; Step 3: The pre-positioning unit is folded up, the negative pressure device connected to the negative pressure unit is started, and the worker adsorbs the bottom bag and the top cover on the corresponding negative pressure unit respectively and ensures that the four corners of the bottom bag and the top cover correspond to the four corners of the container bag; Step 4: The negative pressure unit moves towards the container bag until the edge of the sealing cloth overlaps with the edge of the container bag to a certain extent. The worker manually connects the overlapping part of the sealing cloth and the container bag to the connection of the sewing machine and inserts one side of the U-shaped frame between the sealing cloth and the container bag; Step 5: The lifting motor rotates forward, and the movable frame drives the upper sewing unit and the clamping unit upward; Step 6: The sewing unit starts, and the sewing machine moves in the direction of the track. The sewing machine sews the sealing cloth and the container bag together. When the sewing machine is about to rotate one circle, the folding unit rises, and the sewing machine continues to move a certain distance after rotating one circle; Step 7: The lifting motor reverses, and the worker removes and replaces the sewn container bag; Step 8: Repeat the above steps to complete the continuous production of container bags.

[0019] Compared with the existing known technologies, the technical solution provided by the present invention has the following significant effects: 1. Through the settings of the support unit, negative pressure unit, clamping unit, sewing unit and support frame, the clamping unit clamps the upper and lower opening container bag in a vertical state, and the worker adsorbs the bottom bag and the top cover on the negative pressure unit. The top cover and the bottom bag of the container bag are sewed at the same time by the sewing unit. Compared with the method of sewing only the bottom bag, this method is more efficient and quick, and the equipment is more versatile.

[0020] 2. Through the settings of support unit, negative pressure unit, clamping unit, sewing unit and support frame, the fully automated sewing method has a lower defect rate than manual sewing, avoiding the problem of uneven quality of container bag products caused by different workers' proficiency.

[0021] 3. Through the settings of the disc, large cross, small cross, connecting rod and adjusting motor, the adjusting motor drives the small cross to rotate, and the telescopic arm moves along the direction of the large cross under the action of the connecting rod and the slider. This method can not only support container bags of different sizes, but also in the loading stage of the container bags, the support unit cooperates with the pre-positioning unit to speed up the installation of the container bags, thereby improving the universality and production efficiency of the automatic sewing equipment.

[0022] 4. Through the two sewing units, U-shaped frame, connecting rollers, threaded convex strips and infrared sensors, the bottom bag and the top cover can be sewn at one time. At the same time, compared with the manual folding method, with the participation of the folding unit, the edges of the sealing cloth and the container bag are more neat and beautiful, and the defective rate of the finished container bag is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional schematic diagram of the present invention.

[0024] Figure 2 It is a three-dimensional schematic diagram of the present invention without a container bag and a sewing unit.

[0025] Figure 3 It is a schematic diagram of a partial connection structure of the clamping unit in the present invention.

[0026] Figure 4 It is a schematic diagram of the cooperation between the first piston rod and the cylinder body in the present invention.

[0027] Figure 5 It is a three-dimensional schematic diagram of the sewing unit in the present invention.

[0028] Figure 6 It is a three-dimensional schematic diagram of the support unit in the present invention.

[0029] Figure 7 It is an exploded schematic diagram of the support unit in the present invention.

[0030] Figure 8 It is a schematic diagram of the negative pressure unit and the pre-positioning unit in the present invention.

[0031] Fig. 9 It is a schematic diagram of the folding unit in the present invention.

[0032] Fig.10 It is a schematic diagram of the clamping unit and the connecting piece in the present invention.

[0033] Explanation of the symbols in the schematic diagram: 1. Support frame; 2. Fixed seat; 3. Movable frame; 4. Container bag; 5. Fixed pipe; 6. Negative pressure pipe; 7. L-shaped pipe; 8. Sealing cloth; 9. Seam edge; 10. Clamping box; 11. Roller; 12. Movable plate; 13. Mounting frame; 14. Cylinder; 15. First piston rod; 16. Track; 17. Moving frame; 18. Traveling wheel; 19. Mounting plate; 20. Sewing machine; 21. Shell; 22. Disc; 23. Big cross; 24. Small cross; 25. Slide; 26. Slider; 27. Telescopic arm; 28. Connecting rod; 29. ​​Connecting groove; 30. Limiting column; 31. Rotating shaft; 32. Adjusting motor; 33. U-shaped frame; 34. Connecting roller; 35. Threaded convex strip; 37. Infrared sensor; 38. Support plate; 39. Connecting tube; 40. Moving groove; 41. Clamp; 42. Fixed plate; 43. Threaded rod; 44. First connecting frame; 45. Second connecting frame; 46. Lifting motor; 47. Hydraulic cylinder; 48. Second piston rod; 49. Positioning rod; 50. Telescopic rod; 51. Telescopic plate; 52. Electric push rod; 53. Connecting plate; 54. Telescopic sleeve rod; 55. T-rod; 56. Connecting rod; 57. Branch pipe; 58. Fixed tube; 59. Sliding rod; 60. Screw. DETAILED DESCRIPTION

[0034] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0035] Depend on Figures 1 to 5 Given, including: A support frame 1 is placed on a horizontal plane, the support frame 1 comprises a fixed seat 2, and a movable frame 3 that moves up and down is arranged on the fixed seat 2. Each time a container bag 4 is sewn, the movable frame 3 needs to be raised and lowered once; Support units, the number of the support units is two and they are symmetrically distributed up and down, the two support units are fixed on the fixed seat 2 and the movable frame 3 respectively, a container bag 4 with upper and lower openings is arranged between the two support units, the cross section of the container bag 4 is square and the four sides along the length direction are sewn to form seams 9. It should be noted that the container bag 4 mentioned here represents a rectangular frame without a bag bottom and a top cover, and the rectangular frame can be sewn manually or using a specific automatic sewing device. After the rectangular frame is sewn, four seams 9 will be formed at its four corners; Negative pressure unit, the number of the negative pressure units is two groups, each group has four negative pressure units symmetrically distributed at the four corners of the container bag 4, and the negative pressure unit is adsorbed with a sealing cloth 8, the sealing cloth 8 is a top cover or a bottom bag. When the container bag 4 is opened, the worker places the top cover or the bottom bag on the upper and lower sides of the container bag 4 respectively, and the negative pressure unit descends to adsorb the sealing cloth 8. One point that needs to be noted is that the negative pressure unit is located in the diagonal direction of the container bag 4 and is not close to the four corners of the container bag 4. After the worker adsorbs the sealing cloth 8 on the negative pressure unit, the worker needs to properly adjust the sealing cloth 8 to ensure that the four corners of the sealing cloth 8 correspond to the four corners of the container bag 4; The clamping unit is divided into four groups, each group has two clamping units symmetrically distributed up and down, and the four groups of clamping units are clamped on four seam edges 9 respectively. Specifically, the clamping unit includes two symmetrically distributed clamping boxes 10, a plurality of equally distributed rollers 11 are arranged in the clamping box 10, and the rollers 11 slide in the clamping box 10. A movable plate 12 is arranged on the clamping box 10, and the movable plate 12 is rotatably connected to the plurality of rollers 11. The movable plate 12 is connected to the clamping box 10 through a spring. The two clamping boxes 10 are connected to the same mounting frame 13, and cylinder bodies 14 are fixed at both ends of the mounting frame 13. A first piston rod 15 is slidably connected in the cylinder body 14. The first piston rod 15 One end is fixedly connected to the movable plate 12, and the cylinder body 14 is externally connected to a pressure supply device. In this embodiment, the cylinder body 14 is externally connected to a hydraulic device, such as a hose connected to an oil storage cylinder. A piston rod that moves up and down is arranged in the oil storage cylinder, and the piston rod is connected to the hydraulic cylinder. When the hydraulic cylinder drives the piston rod to move, the hydraulic oil in the oil storage cylinder enters the cylinder body 14 through the hose. When the container bag 4 is basically placed, the clamping unit fixes the seam edge 9, and the hydraulic cylinder is started. Under the action of the oil storage cylinder, the hose and the cylinder body 14, the two first piston plates drive the clamping boxes 10 to approach each other. When the pressure in the cylinder body 14 does not reach a certain level, the clamping box 10 is mainly in contact with the seam edge 9. As the pressure in the cylinder body 14 increases, the roller 11 contacts the seam edge 9 again. Sewing units, there are two sewing units and they are symmetrical up and down. It should be noted that when the clamping box 10 clamps the seam edge 9, a certain length of space should be left on the upper and lower sides of the seam edge 9 to facilitate the passage of the sewing unit. The sewing unit includes a rounded rectangular track 16, and a moving frame 17 is provided on the track 16. One end of the moving frame 17 is provided with a walking wheel 18 matching the track 16, and one side of the walking wheel 18 is provided with a power unit, such as an electric motor. A mounting plate 19 is fixed to the other end of the moving frame 17, and a sewing machine 20 is fixed to the mounting plate 19 for sewing the sealing cloth 8 and the container bag 4 together. After the container bag 4 is clamped in the clamping unit, the upper and lower edges of the container bag 4 and the corresponding edges of the sealing cloth 8 are connected to the sewing machine 20. When the sewing machine 20 moves around the track 16, the sewing machine 20 automatically sews the sealing cloth 8 and the container bag 4 together.

[0036] refer to Figure 6 and Figure 7As shown, specifically, the support unit includes a shell 21, a disk 22 is fixed in the shell 21, a large cross 23 is fixed on the side of the disk 22 close to the container bag 4, a small cross 24 is rotatably connected to the disk 22 and located between the disk 22 and the large cross 23, four circumferentially evenly distributed slide grooves 25 are provided in the large cross 23, sliders 26 are slidably connected in the four slide grooves 25, a card slot is provided in the slide groove 25, and a card block matching the slider 26 is fixed on the slider 26. In order to ensure the smoothness of the slider 26 sliding in the large cross 23 and prevent the problem of uneven sliding or even blocked sliding, a spring assembly can be arranged in the slide groove 25, and the spring assembly can directly adopt a method of directly connecting the spring and the slider 26, and the spring is retracted in the slide groove 25. In order to prevent the spring from deflecting during retraction, guide rods can be arranged on both sides of the slider 26, and the axis of the guide rods is consistent with the axis of the spring. A telescopic arm 27 is fixed to one end of the slider 26 , the pre-positioning unit and the negative pressure unit are installed on the telescopic arm 27, the other end of the slider 26 is rotatably connected with a connecting rod 28, one end of the connecting rod 28 is rotatably connected with the small cross 24, a connecting groove 29 is provided at the outer edge of the disc 22 in the circumferential direction, a limiting column 30 is provided at the connection between the small cross 24 and the connecting rod 28, and the limiting column 30 slides in the connecting groove 29, a rotating shaft 31 passing through the disc 22 is fixed at the axis of the small cross 24, and an adjusting motor 32 is connected to the end of the rotating shaft 31 away from the small cross 24, and the adjusting motor 32 can be rotated forward and reversely. When the adjusting motor 32 rotates forward, the small cross 24 rotates to drive the connecting rod 28 to move, and the telescopic arm 27 expands outward at this time, and the expansion direction of the telescopic arm 27 is consistent with the diagonal of the container bag 4. Through the arrangement of the disc 22, the large cross 23, the small cross 24, the connecting rod 28 and the adjusting motor 32, the container bags 4 of different sizes are supported, thereby improving the universality of the automatic sewing equipment.

[0037] refer to Figure 5As shown, due to the different sizes of the container bags 4, the position of the sewing machine 20 also needs to be adjusted, so it is necessary to further supplement the sewing unit that the mobile frame 17 includes a fixed cylinder 58, a sliding rod 59 is slidably connected in the fixed cylinder 58, one end of the sliding rod 59 is fixedly connected to the mounting plate 19, a screw 60 that passes through the fixed cylinder 58 is fixed on the sliding rod 59, the fixed cylinder 58 is threadedly connected to the screw 60, and a handle is fixed on the end of the screw 60 away from the sliding rod 59. When the worker turns the handle, the sliding rod 59 slides in the fixed tube 58 to achieve stepless adjustment of the sewing machine 20, which can be applicable to container bags 4 of various sizes. The sewing machine 20 is an automatic sewing machine 20. A winding drum is provided on one side of the sewing machine 20. The winding drum is a component for feeding the wire into the sewing machine 20. It is a prior art and will not be described in detail here. A cutting device can be provided on one side of the sewing machine 20. The cutting device is adopted by most automatic sewing machines. The cutter is driven by hydraulic pressure or startup to cut the sewing thread. It will not be described in detail here.

[0038] refer to Figure 8 As shown, when in use, the negative pressure unit not only has a lifting action, but also needs to avoid the negative pressure unit from interfering with the movement of the sewing machine 20, so it is necessary to further supplement the negative pressure unit, that the negative pressure unit includes a fixed tube 5, a negative pressure tube 6 that slides up and down is arranged in the fixed tube 5, a piston plate is coaxially sleeved on the negative pressure tube 6, and the fixed tube 5 is externally connected to a pressure supply device. In this embodiment, a connecting tube is arranged on one side of the fixed tube 5, and the connecting tube is connected to the hydraulic device through a hose. When the hydraulic device supplies oil, the piston plate is squeezed and drives the negative pressure tube 6 to move in the direction of the container bag 4, and vice versa, the negative pressure tube 6 is retracted, and the negative pressure tube 6 is connected to an L-shaped tube 7 on the side close to the container bag 4, and the L-shaped tube 7 is opened on the side close to the container bag 4. There are multiple air holes distributed at equal intervals, and the sealing cloth 8 is adsorbed under the L-shaped tube 7 under the action of negative pressure. The negative pressure tube 6 is externally connected to a negative pressure device. In this embodiment, the negative pressure device can be an exhaust fan. The negative pressure tube 6 and the exhaust fan are connected through a hose. In the initial state, the negative pressure tube 6 is in a retracted state. When the four seams 9 are respectively fixed by the clamping units, the exhaust fan is started, and the worker manually adsorbs the sealing cloth 8 on the L-shaped tube 7. The pressure supply equipment external to the fixed tube 5 is started, and the negative pressure tube 6 approaches the direction of the container bag 4 under the action of hydraulic pressure until the edge of the sealing cloth 8 is slightly lower than the edge of the container bag 4. Through the settings of the fixed tube 5, the negative pressure tube 6, the L-shaped tube 7 and the piston plate, the worker only needs to place the sealing cloth 8 on the corresponding negative pressure unit.

[0039] refer to Fig. 9As shown, considering that the edges of the sealing cloth 8 and the container bag 4 need to be aligned when the sewing machine 20 is sewing in a circle, the manual alignment method is not only very troublesome, but also causes the edges of the sealing cloth 8 and the container bag 4 to be uneven due to the different proficiency of the workers, which not only affects the appearance of the product, but also causes the container bag 4 to become a defective product. A folding unit is provided on one side of the sewing machine 20. The number of the folding units is two. The folding units are fixed on the mounting plate 19 and are located on one side of the walking path of the sewing machine 20 to assist in sewing the sealing cloth 8 and the container bag 4; To supplement the specific structure of the folding unit, the folding unit includes a U-shaped frame 33 slidably connected to the mounting plate 19, the U-shaped frame 33 slides up and down, one side of the U-shaped frame 33 is located between the container bag 4 and the sealing cloth 8, and a lifting component is provided between the U-shaped frame 33 and the mounting plate 19. In this embodiment, the lifting component can be a motor or a screw to drive the U-shaped frame 33 to rise or fall, and a threaded cylinder is fixed on the U-shaped frame 33, such as Fig. 9 As shown, a notch is provided on the mounting plate 19, and a U-shaped frame 33 can be lifted and lowered inside the mounting plate 19. When the sewing machine 20 is about to make a circle, the lifting assembly drives the U-shaped frame 33 away from the sealing cloth 8. A vertical connecting roller 34 is provided inside the U-shaped frame 33, and a threaded convex strip 35 is provided on the surface of the connecting roller 34. When the connecting roller 34 rotates, the threaded convex strip 35 exerts a certain pulling force on the edge of the sealing cloth 8, so that the edge of the sealing cloth 8 is aligned with the edge of the container bag 4. The connecting roller 34 is externally connected to a power device, and the power device includes a motor, and a control unit is provided inside the motor. An infrared sensor is provided on the side of the U-shaped frame 33 close to the sewing machine 20. The infrared sensor 37 is electrically connected to the motor. When the infrared sensor 37 detects the edge of the sealing cloth 8, the motor stops rotating. It should be noted that when the motor stops rotating, the connecting roller 34 will rotate slowly under the rotation of the outside world. However, due to the slow rotation speed, the threaded convex strip 35 will not generate a large pulling force on the sealing cloth 8. Through the U-shaped frame 33, the connecting roller 34, the threaded convex strip 35 and the infrared sensor 37, the folding unit can be used without human intervention. Compared with the manual folding method, with the participation of the folding unit, the edges of the sealing cloth 8 and the container bag 4 are more neat and beautiful, and the defective rate of the finished container bag 4 is also greatly reduced. refer to Fig. 9As shown, it should be further noted that in order to enhance the neatness of the sealing cloth 8 and the container bag 4 after folding, and to facilitate the subsequent sewing of the sewing machine 20, a support plate 38 is fixed to the side of the U-shaped frame 33 close to the sewing machine 20, and a horizontal connecting tube 39 is fixed to the end of the support plate 38 away from the U-shaped frame 33. Moving grooves 40 are provided on both sides of the bottom of the connecting tube 39. A sliding clamp 41 is arranged in the connecting tube 39. The clamp 41 is made of metal and the surface of the clamp 41 is relatively smooth. When the folding unit follows the sewing unit, the clamp 41 will not generate a large tearing force on the container bag 4 and the sealing cloth 8, but only clamps the two to make them regular. The clamp 41 is connected to the connecting tube 39 by a spring. When using the equipment, the worker needs to manually place the container bag 4 and the sealing cloth 8 to the corresponding position of the folding unit.

[0040] refer to Figure 8 As shown, considering that it is troublesome for workers to connect the clamping unit and the seam 9 in sequence, and the installation time is too lengthy, a pre-positioning unit is also provided. The number of the pre-positioning units is two groups, each group has four positioning units and is respectively located at the four corners of the support unit, so as to pre-position the container bag 4. During use, the support unit contracts, and the pre-positioning unit contracts with the support unit. The worker simply opens the container bag 4 and puts it on the pre-positioning unit. The support unit drives the pre-positioning unit to expand, and the container bag 4 is opened by the two pre-positioning units. The worker rotates and adjusts the container bag 4 so that the four seams 9 of the container bag 4 are consistent with the expansion direction of the support unit. When the pre-positioning unit opens the container bag 4, the container bag 4 is basically in a fixed state, and the worker needs to simply adjust the upper and lower openings of the container bag 4 so that there are no obvious wrinkles or overlaps. Considering that the pre-positioning unit cannot affect the movement of the sewing unit, it is also necessary to consider the position coordination problem between the negative pressure unit and the pre-positioning unit to prevent the negative pressure unit from affecting the pre-positioning unit. Further supplementing the structure of the pre-positioning unit is that the pre-positioning unit includes a hydraulic cylinder 47 fixed on the telescopic arm 27, a second piston rod 48 is arranged in the hydraulic cylinder 47, a positioning rod 49 is fixed on the second piston rod 48, and the hydraulic cylinder 47 is externally connected to a pressure supply device. In this embodiment, the pressure supply device A hydraulic cylinder can be selected. When the hydraulic cylinder is started, the second piston rod 48 drives the positioning rod 49 to move towards the direction close to the container bag 4. When the worker installs the container bag 4, the container bag 4 can be directly put on the positioning rod 49. When the positioning rods 49 at the four corners are opened, the container bag 4 is opened and fixed. The worker simply rotates and adjusts the container bag 4. Through the settings of the hydraulic cylinder 47, the second piston rod 48 and the positioning rod 49, the container bag 4 can be pre-positioned, and then the clamping unit can be connected to the seam 9, which saves time and effort.

[0041] refer to Fig.10As shown, considering that there is a certain matching relationship between the support frame 1 and the track 16, the sewing unit on the movable frame 3 needs to rise synchronously with them, so the lifting method of the support frame 1 and the matching relationship between the lifting frame and the track 16 are supplemented by that the left and right sides of the fixed seat 2 are provided with fixed plates 42, and the fixed plates 42 are rotatably connected with threaded rods 43. Two left-right symmetrical first connecting frames 44 and second connecting frames 45 are respectively fixed on the fixed seat 2 and the movable frame 3. The first connecting frame 44 and the second connecting frame 45 are fixed to the corresponding tracks 16, and a threaded cylinder matching the threaded rod 43 is fixed on the second connecting frame 45. A lifting motor 46 located on one side of the threaded rod 43 is fixed on the fixed plate 42, and the lifting motor 46 is connected to the threaded rod 43. The lifting motor 46 can be rotated forward and reversed. When the lifting motor 46 rotates forward, the second connecting frame 45 drives the movable frame 3 to rise under the action of the threaded rod 43, and reverses to descend, and the track 16 fixed to the second connecting frame 45 follows the movable frame 3 to rise.

[0042] refer to Fig.10 As shown, considering that the clamping unit needs to clamp the container bags 4 of different sizes, the distance between the clamping unit and the container bags 4 needs to be adjusted. What needs to be further supplemented and coordinated with the structure of the clamping unit is that the two mounting frames 13 symmetrically distributed up and down are connected with the same telescopic rod 50, and the same telescopic plate 51 is arranged between the telescopic rods 50 symmetrically front and back. An electric push rod 52 is fixed to the middle of the telescopic plate 51, and the electric push rod 52 is fixedly connected to the first connecting frame 44. The fixing seat 2 is fixed with four circumferentially evenly distributed connecting plates 53, and a telescopic sleeve rod 54 is fixed on the connecting plate 53. The axis of the telescopic sleeve rod 54 is consistent with the diagonal line of the container bag 4, and one end of the telescopic sleeve rod 54 is fixedly connected to the mounting frame 13. A limiting groove is provided at the bottom of the second connecting frame 45, and a T-shaped rod 55 sliding left and right is provided in the limiting groove. T-shaped grooves are provided on both sides of the T-shaped rod 55, and a connecting rod 56 is slidably connected in the T-shaped groove. The end of the connecting rod 56 away from the T-shaped rod 55 is sleeved with the telescopic rod 50, and the telescopic sleeve rod 54, the telescopic rod 50, and the telescopic plate are used to connect the connecting rod 56. 51, electric push rod 52 and T-rod 55 are arranged. When the movable frame 3 rises upward, the T-rod 55 and the connecting rod 56 drive the upper mounting frame 13 and the connecting piece to rise synchronously. At the same time, according to the size of the container bag 4, the electric push rod 52 can adjust the clamping unit. During the adjustment stage, the telescopic plate 51 and the telescopic sleeve rod 54 will be stretched or compressed accordingly. The T-rod 55 slides at the bottom of the second connecting frame 45, and the connecting rod 56 slides in the T-slot opened on one side of the T-rod 55. The advantage of this arrangement is that it can clamp container bags 4 of different sizes, thereby improving the universality of the sealing and sewing equipment.

[0043] refer to Figure 6 and Figure 8 As shown, considering that the length of the L-shaped tube 7 cannot be too long, otherwise it is easy to collide when the support unit shrinks, but the L-shaped tube 7 is too short, the adsorption effect on the sealing cloth 8 cannot reach the best state, the two ends of the L-shaped tube 7 are respectively slidably connected with branch tubes 57, the branch tube 57 is connected to the L-shaped tube 7, and the bottom of the branch tube 57 is provided with a plurality of equidistantly distributed circular holes, and the branch tube 57 is connected to the L-shaped tube 7 through a spring.

[0044] When the present invention is used: First, the worker simply stretches out the container bag 4 with upper and lower openings and puts it on the pre-positioning unit. The support unit drives the pre-positioning unit to expand, and the container bag 4 is stretched out by the two pre-positioning units. The worker rotates and adjusts the container bag 4 so that the four seams 9 of the container bag 4 are consistent with the expansion direction of the support unit. When the pre-positioning unit stretches out the container bag 4, the container bag 4 is basically in a fixed state. The worker needs to simply adjust the upper and lower openings of the container bag 4 so that there are no obvious wrinkles or overlaps. Then, when the container bag 4 is basically placed, the clamping unit fixes the seam edge 9, and the hydraulic cylinder is started. Under the action of the oil storage cylinder, the hose and the cylinder body 14, the two first piston plates drive the clamping boxes 10 to approach each other. When the pressure in the cylinder body 14 does not reach a certain level, the clamping box 10 is mainly in contact with the seam edge 9. As the pressure in the cylinder body 14 increases, the roller 11 contacts the seam edge 9 again. When the movable frame 3 rises, the roller 11 can smooth the seam edge 9 to a certain extent. After the four seams 9 are fixed by the clamping units, the pre-positioning unit is retracted, the exhaust fan is started, and the worker manually adsorbs the sealing cloth 8 on the L-shaped tube 7. The pressure supply device connected to the fixed tube 5 is started, and the negative pressure tube 6 approaches the direction of the container bag 4 under the action of the hydraulic pressure until the edge of the sealing cloth 8 is slightly lower than the edge of the container bag 4. Secondly, after the container bag 4 is clamped in the clamping unit, the upper and lower edges of the container bag 4 and the corresponding edges of the sealing cloth 8 are connected to the sewing machine 20; The lifting motor 46 rotates forward, and the second connecting frame 45 drives the movable frame 3 to rise under the action of the threaded rod 43. After the container bag 4 is fully unfolded or unfolded to a certain extent, the sewing unit starts to work, and the sewing machine 20 rotates around the track 16 and performs sewing. During sewing, the folding unit aligns the edge of the sealing cloth 8 with the edge of the container bag 4. When the sewing machine 20 is about to make a circle, the lifting assembly drives the U-shaped frame 33 away from the sealing cloth 8. After the sewing machine 20 rotates one circle, it can continue to sew for a short distance to reinforce the connection effect between the sealing cloth 8 and the container bag 4; Finally, after the finished product of the container bag 4 is sewn, the movable frame 3 is lowered and the worker changes the material, thereby realizing a reciprocating cycle of sewing.

[0045] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A container bag sealing device, characterized in that: include: A support frame (1) placed on a horizontal plane, the support frame (1) comprising a fixed seat (2), and a movable frame (3) movable up and down is arranged on the fixed seat (2); Support units, the number of the support units being two and being symmetrically distributed up and down, the two support units being fixed on a fixed seat (2) and a movable frame (3) respectively, a container bag (4) with upper and lower openings being arranged between the two support units, the container bag (4) having a square cross section and having seam edges (9) sewn along four sides in a vertical direction; Negative pressure units, the negative pressure units are divided into two groups, each group has four negative pressure units symmetrically distributed at the four corners of the container bag (4), and a sealing cloth (8) is adsorbed on the negative pressure unit, and the sealing cloth (8) is a top cover or a bottom bag; A clamping unit, wherein the clamping unit is divided into four groups, each group having two clamping units symmetrically distributed up and down, and the four groups of clamping units are respectively clamped on four seam edges (9), the clamping unit comprises two symmetrically distributed clamping boxes (10), a plurality of equally distributed rollers (11) are arranged in the clamping box (10), the rollers (11) slide in the clamping box (10), a movable plate (12) is arranged on the clamping box (10), the movable plate (12) is rotatably connected to the plurality of rollers (11), the movable plate (12) is connected to the clamping box (10) via a spring, the clamping box (10) in the same negative pressure unit is connected to the same mounting frame (13), both ends of the mounting frame (13) are fixed with a cylinder body (14), a first piston rod (15) is slidably connected in the cylinder body (14), one end of the first piston rod (15) is fixedly connected to the movable plate (12), and the cylinder body (14) is externally connected to a pressure supply device; A sewing unit, wherein the number of the sewing units is two and the units are symmetrical up and down, the sewing units comprising a rounded rectangular track (16), a movable frame (17) being arranged on the track (16), a running wheel (18) matching the track (16) being arranged at one end of the movable frame (17), the running wheel (18) being externally connected to a power device, a mounting plate (19) being fixed at the other end of the movable frame (17), a sewing machine (20) being fixed on the mounting plate (19) for sewing a sealing cloth (8) and a container bag (4) together.

2. A container bag sealing device according to claim 1, characterized in that: The support unit comprises a shell (21), a disk (22) is fixed in the shell (21), a large cross (23) is fixed on a side of the disk (22) close to the container bag (4), a small cross (24) is rotatably connected to the disk (22) and located between the disk (22) and the large cross (23), four circumferentially evenly distributed slide grooves (25) are provided in the large cross (23), a slider (26) is slidably connected in each of the four slide grooves (25), a telescopic arm (27) is fixed at one end of the slider (26), and the negative pressure unit is mounted on the telescopic arm (27). The other end of the slider (26) is rotatably connected to a connecting rod (28), one end of the connecting rod (28) is rotatably connected to the small cross (24), a connecting groove (29) is provided at the outer edge of the disc (22) along the circumferential direction, a limiting column (30) is provided at the connection between the small cross (24) and the connecting rod (28), the limiting column (30) slides in the connecting groove (29), a rotating shaft (31) penetrating the disc (22) is fixed at the axis of the small cross (24), and an end of the rotating shaft (31) away from the small cross (24) is connected to an adjusting motor (32).

3. A container bag sealing device according to claim 2, characterized in that: The movable frame (17) comprises a fixed cylinder (58), a sliding rod (59) is slidably connected inside the fixed cylinder (58), one end of the sliding rod (59) is fixedly connected to the mounting plate (19), a screw rod (60) penetrating the fixed cylinder (58) is fixed on the sliding rod (59), and a handle is fixed on one end of the screw rod (60) away from the sliding rod (59). The sewing machine (20) is an automatic sewing machine, and a winding drum is provided on one side of the sewing machine (20).

4. A container bag sealing device according to claim 3, characterized in that: The negative pressure unit comprises a fixed pipe (5), a negative pressure pipe (6) which slides up and down is arranged inside the fixed pipe (5), a piston plate is coaxially sleeved on the negative pressure pipe (6), a side of the negative pressure pipe (6) close to the container bag (4) is connected to an L-shaped pipe (7), a side of the L-shaped pipe (7) close to the container bag (4) is provided with a plurality of air holes distributed at equal intervals and adsorbed with a sealing cloth (8), and the negative pressure pipe (6) is externally connected to a negative pressure device.

5. A container bag sealing device according to claim 4, characterized in that: It also includes two folding units, the folding units are fixed on the mounting plate (19) and located on one side of the travel path of the sewing machine (20); The folding unit comprises a U-shaped frame (33) slidably connected to the mounting plate (19), one side of the U-shaped frame (33) being located between the container bag (4) and the sealing cloth (8), a vertical connecting roller (34) being arranged in the U-shaped frame (33), a surface of the connecting roller (34) being provided with a threaded convex strip (35), the connecting roller (34) being externally connected to a power device, and an infrared sensor (37) being arranged on a side of the U-shaped frame (33) close to the sewing machine (20); A support plate (38) is fixed to a side of the U-shaped frame (33) close to the sewing machine (20), and a horizontally placed connecting tube (39) is fixed to an end of the support plate (38) away from the U-shaped frame (33). Moving grooves (40) are provided on both sides of the bottom of the connecting tube (39). A sliding clamping plate (41) is provided in the connecting tube (39), and the clamping plate (41) is connected to the connecting tube (39) via a spring.

6. A container bag sealing device according to claim 5, characterized in that: It also includes pre-positioning units, the number of which is two groups, each group having four positioning units and respectively located at the four corners of the support unit, for pre-positioning the container bag (4); The pre-positioning unit comprises a hydraulic cylinder (47) fixed on the telescopic arm (27), a second piston rod (48) is arranged in the hydraulic cylinder (47), a positioning rod (49) is fixed on the second piston rod (48), and the hydraulic cylinder (47) is externally connected to a pressure supply device.

7. A container bag sealing device according to claim 6, characterized in that: A fixing plate (42) is provided on both left and right sides of the fixing seat (2), and a threaded rod (43) is rotatably connected to the fixing plate (42). Two left-right symmetrical first connecting frames (44) and second connecting frames (45) are fixed to the fixing seat (2) and the movable frame (3), respectively. The first connecting frames (44) and the second connecting frames (45) are fixed to corresponding rails (16), and a threaded cylinder matching the threaded rod (43) is fixed to the second connecting frame (45). A lifting motor (46) located on one side of the threaded rod (43) is fixed to the fixing plate (42), and the lifting motor (46) is connected to the threaded rod (43).

8. The container bag sealing device according to claim 7, characterized in that: The same telescopic rod (50) is connected to the two mounting frames (13) symmetrically distributed up and down, and the same telescopic plate (51) is arranged between the telescopic rods (50) symmetrically distributed front and back, and an electric push rod (52) is fixed in the middle of the telescopic plate (51), and the electric push rod (52) is fixedly connected to the first connecting frame (44); Four connecting plates (53) evenly distributed around the circumference are fixed to the fixing seat (2), a telescopic sleeve rod (54) is fixed to the connecting plate (53), the axis of the telescopic sleeve rod (54) is consistent with the diagonal of the container bag (4), one end of the telescopic sleeve rod (54) is fixedly connected to the mounting frame (13), a limiting groove is provided at the bottom of the second connecting frame (45), a T-shaped rod (55) sliding left and right is provided in the limiting groove, both sides of the T-shaped rod (55) are provided with T-shaped grooves, a connecting rod (56) is slidably connected in the T-shaped groove, and one end of the connecting rod (56) away from the T-shaped rod (55) is sleeved with the telescopic rod (50).

9. The container bag sealing device according to claim 8, characterized in that: Both ends of the L-shaped tube (7) are slidably connected to branch tubes (57), the branch tubes (57) are in communication with the L-shaped tube (7), a plurality of equidistantly distributed circular holes are provided at the bottom of the branch tube (57), and the branch tube (57) is connected to the L-shaped tube (7) via a spring.

10. A method for using a container bag sealing device, characterized in that: The container bag sealing device according to claim 9 comprises the following steps: Step 1: A worker places a container bag (4) with upper and lower openings between two support units, with the four corners mounted on the pre-positioning unit. The support unit expands to open the container bag (4), and the container bag (4) is simply adjusted to ensure that the four corners are aligned with the four corners of the pre-positioning unit. Step 2: The electric push rod (52) is started, the clamping unit approaches the four seams (9) of the container bag (4), the pressure supply device external to the cylinder (14) is started, and the clamping unit clamps the seams (9); Step 3: The pre-positioning unit is folded up, the negative pressure device connected to the negative pressure unit is started, and the worker respectively attaches the bottom bag and the top cover to the corresponding negative pressure unit and ensures that the four corners of the bottom bag and the top cover correspond to the four corners of the container bag (4); Step 4: The negative pressure unit moves toward the container bag (4) until the edge of the sealing cloth (8) overlaps with the edge of the container bag (4) to a certain extent, and the worker manually connects the overlapping portion of the sealing cloth (8) and the container bag (4) to the connection of the sewing machine (20) and inserts one side of the U-shaped frame (33) between the sealing cloth (8) and the container bag (4); Step 5: The lifting motor (46) rotates forward, and the movable frame (3) drives the upper sewing unit and the clamping unit upward to rise; Step 6: The sewing unit is started, and the sewing machine (20) moves in the direction of the track (16). The sewing machine (20) sews the sealing cloth (8) and the container bag (4) together. When the sewing machine (20) is about to rotate one circle, the folding unit rises, and the sewing machine (20) continues to move a certain distance after rotating one circle. Step 7: The lifting motor (46) is reversed, and the worker removes and replaces the sewn container bag (4); Step 8: Repeat the above steps to complete the continuous production of container bags (4).

Images