Packaging bag conveying mechanism capable of achieving distance reduction to be matched with end seal
By introducing the design of hinged rods and height adjustment pins in the packaging bag conveying mechanism, the problems of unstable conveying and non-adjustable spacing are solved, stable conveying and efficient end sealing are achieved, and the conveying efficiency and end sealing quality of the packaging bags are improved.
Patent Information
- Application Number
- CN202510995015.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-18
- Publication Date
- 2025-09-16
AI Technical Summary
The existing packaging bag conveying mechanism has a polygonal effect between the conveying chain and the sprocket, which affects the movement stability, resulting in unstable packaging bag conveying and inability to effectively adjust the distance between two adjacent packaging bags to facilitate end sealing operations.
A packaging bag conveying mechanism is designed. By setting a hinge rod and a height adjustment pin on the conveying trough, the spacing between adjacent conveying troughs can be adjusted. The rack and pinion transmission and the movement of the hinge rod are combined with the spacing adjustment track to adjust the conveying trough spacing to match the requirements of the end sealing mechanism.
It improves the stability of packaging bag transportation and the efficiency of end sealing, reduces the waste of packaging bag materials, and enhances the coordination effect with the end sealing mechanism.
Smart Images
Figure CN120646331A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of packaging bag conveying, and in particular to a packaging bag conveying mechanism capable of achieving a shortened distance to match an end seal. Background Art
[0002] In the prior art, the conveying and packaging of products in other fields such as wet wipes and paper towels are carried out during the conveying process. For example, the product is first longitudinally sealed in a packaging bag. After longitudinal sealing, the product is conveyed forward using a conveying mechanism. When it is conveyed to the end sealing station, the end sealing operation of the packaging bag is performed using the end sealing mechanism.
[0003] In the prior art, the conveying mechanism is typically a sprocket conveyor mechanism, comprising a left sprocket conveyor mechanism and a right sprocket conveyor mechanism. The left sprocket conveyor mechanism has a plurality of left conveyor troughs on its conveying chain, while the right sprocket conveyor mechanism has a plurality of right conveyor troughs on its conveying chain corresponding to the left conveyor troughs. During operation, the longitudinally sealed packaging bag is positioned between the left and right conveyor troughs and thus conveyed forward.
[0004] The problem with the existing conveying mechanism is that there is a polygonal effect in the engagement between the conveying chain and the corresponding sprocket, which affects the stability of the conveying trough movement, and thus affects the stability of the packaging bag conveying, and is not conducive to cooperating with the end sealing mechanism to complete the end sealing; in addition, when the end sealing mechanism is working, the packaging bags between two adjacent products must be vertically squeezed, which will require more packaging bag materials. However, in the existing technology, the distance between the two adjacent conveying troughs in the front and rear directions on the conveying mechanism cannot be adjusted, so it is not conducive to the end sealing operation. Summary of the Invention
[0005] The object of the present invention is to provide a packaging bag conveying mechanism capable of reducing the distance between two adjacent products to match an end sealing mechanism.
[0006] A technical solution of a packaging bag conveying mechanism capable of achieving a reduced distance to match the end seal in the present invention is as follows: A packaging bag conveying mechanism capable of achieving a shortened distance to match an end seal, comprising a left conveying mechanism and a right conveying mechanism, wherein both the left conveying mechanism and the right conveying mechanism comprise a plurality of conveying troughs spaced apart along the circumference, and the two adjacent conveying troughs in the front and rear directions are called the front conveying trough and the rear conveying trough, and the front and rear sides of the trough bottom plates of the front conveying trough and the rear conveying trough are hinged with swing arms, and the hinge axes of the swing arms are extended in the up and down directions, and the adjacent swing arms on the front conveying trough and the rear conveying trough are respectively called the front swing arms and the rear swing arms, and the upper end of the front swing arm is hinged with a front rack extending in the up and down directions, and the upper end of the rear swing arm is hinged with a rear rack extending in the up and down directions, and the adjacent ends of the front rack and the rear rack are mounted on the rack bracket, and rack gears are provided on the opposite sides of the front rack and the rear rack in the rack bracket, and the opposite sides of the rack gears are divided into The front and rear racks are engaged with each other for transmission, and the center of the rack gear slides up and down and is penetrated by a height adjustment vertical rod, and a height adjustment pin is fixed on the upper end of the height adjustment vertical rod, and a hinge rod hinge shaft is fixed on the bottom of the height adjustment vertical rod. The front conveying trough is also hinged with a front hinge rod with a horizontal axis, and the rear conveying trough is also hinged with a rear hinge rod with a horizontal axis. The adjacent ends of the front and rear hinge rods are provided with hinge holes arranged coaxially, and the hinge rod hinge shaft is passed through the hinge hole. The packaging bag conveying mechanism also includes a spacing adjustment track, and the spacing adjustment track includes an adjustment track body with a waist-shaped structure. A height adjustment groove closed along the circumference of the adjustment track body is provided on the outer side surface of the adjustment track body, and the bottom circumference of the height adjustment pin is in contact and guided with the bottom of the height adjustment groove, and the height adjustment groove has a low section and a high section.
[0007] Furthermore, the length of the hinge hole is shorter than the length of the hinge shaft of the hinge rod, so the front hinge rod and the rear hinge rod can move in the axial direction of the hinge shaft of the hinge rod relative to the hinge shaft of the hinge rod.
[0008] Furthermore, the rack bracket is a sleeve-shaped structure, and the upper and lower ends of the height adjustment vertical rod pass through the upper and lower ends of the rack bracket.
[0009] Furthermore, the axes of the height adjustment pin and the hinge shaft of the hinge rod are extended in the left-right direction.
[0010] Furthermore, the left conveying mechanism and the right conveying mechanism include a front drive gear and a rear drive gear whose axes extend in the up and down directions. The bottom of the output groove is provided with transmission teeth for engaging and transmitting with the corresponding drive gears, and the drive gear engages and transmits with at least two adjacent transmission teeth at the same time.
[0011] Furthermore, the two rocker arms corresponding to one conveying trough are located on the front and rear sides of the transmission teeth of the conveying trough.
[0012] The beneficial effects of the present invention are as follows: In the present invention, two adjacent conveying troughs are connected by a front hinge rod and a rear hinge rod. When the adjacent ends of the front hinge rod and the rear hinge rod move up and down, the distance between the two adjacent conveying troughs can be controlled, and the up and down movement of the adjacent ends of the front hinge rod and the rear hinge rod is achieved by the cooperation of the height adjustment pin and the height adjustment slot. When the height adjustment pin cooperates with the high section of the height adjustment slot, the adjacent ends of the front hinge rod and the rear hinge rod swing upward, and the distance between the two adjacent conveying troughs will be expanded; when the height adjustment pin cooperates with the low section of the height adjustment slot, the adjacent ends of the front hinge rod and the rear hinge rod swing downward, and the distance between the two adjacent conveying troughs will be reduced, and the packaging bags between the two conveying troughs will gather, which is convenient for cooperating with the end sealing mechanism to realize the end sealing of the packaging bags. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a diagram showing the use state of an embodiment of the packaging bag conveying mechanism capable of achieving a reduced distance to match the end seal in the present invention; Figure 2 Schematic diagram of the structure of the ultrasonic end sealing mechanism of the differential gear train in Example 1; Figure 3 for Figure 2 A stereogram from one perspective; Figure 4 for Figure 2 A stereogram from another perspective; Figure 5 yes Figure 2 BB cross-sectional view; Figure 6 yes Figure 2 AA section view; Figure 7 yes Figure 2 Schematic diagram of the coordination between the ultrasonic transducer and the welding head beam; Figure 8 yes Figure 2 Schematic diagram of the structure of the midsole mold; Figure 9 yes Figure 2 Side view of Figure 10 yes Figure 1 A structural diagram from another perspective; Figure 11 yes Figure 1 Schematic diagram of the cooperation between the welding head turntable on the left side and the upper planetary gear and the upper center gear on it; Figure 12 This is a schematic diagram of the packaging principle of the packaging machine of the present invention for packaging materials; Figure 13 It is a structural schematic diagram of the packaging bag conveying mechanism of the present invention; Figure 14 yes Figure 13 A structural diagram from another perspective; Figure 15 yes Figure 13 Schematic diagram of the coordination of two adjacent conveying troughs; Figure 16 yes Figure 15 A structural diagram from another perspective; Figure 17 yes Figure 13 Schematic diagram of the structure of the center distance adjustment track; Figure 18 yes Figure 17 Stereoscopic image of Figure 19 yes Figure 17 The structural diagram of the other side; Figure 20 yes Figure 17 Stereoscopic image of Figure 21 yes Figure 13 Schematic diagram of the structure of the center angle plug control track; Figure 22 yes Figure 21 Stereoscopic image of Figure 23 It is a schematic diagram of the cooperation between the conveyor frame, the conveyor wheel and the conveyor trough in the packaging bag conveyor mechanism of the present invention; Figure 24 This is a schematic diagram of the coordination between the two conveying troughs and the packaging bags; Figure 25 yes Figure 24 CC sectional view; Figure 26 yes Figure 24 Stereoscopic image of Figure 27 This is a schematic diagram of the coordination of two adjacent racks in the packaging bag conveying mechanism of the present invention; Figure 28 It is a schematic structural diagram of the front corner plug-in of the present invention; Figure 29 It is a schematic structural diagram of the rear corner plug-in of the present invention; Figure 30 This is a schematic diagram of the cooperation between the ultrasonic transducer and the welding head in the present invention; Figure 31 yes Figure 8 Stereoscopic image of Figure 32 yes Figure 30 Schematic diagram of the structure of the medium serrated cutter; Figure 33 yes Figure 31 Schematic diagram of the coordination between the middle serrated cutter and the cutter channel; Figure 34Schematic diagram of the cooperation between the height adjustment pin and the height adjustment slot in the present invention; Figure 35 It is a schematic diagram of the cooperation between the height adjustment vertical rod and the hinge axis of the hinge rod in the present invention; Figure 36 This is a schematic diagram of the cooperation between the bracket, the upper U-shaped track, and the lower U-shaped track in the present invention; Figure: 1. Conveyor frame; 2. Conveyor mechanism on the left; 3. Conveyor mechanism on the right; 4. Conveyor frame; 5. Welding head turntable on the left; 6. Upper transmission plate; 7. Conveyor trough; 8. Main drive motor; 9. Attitude adjustment motor; 10. First interplanetary transmission belt; 11. Welding head turntable on the right; 12. Second transmission belt on the right; 13. First transmission belt on the right; 14. Lower transmission wheel; 15. Second interplanetary transmission belt; 16. First transmission belt on the left; 17. Second transmission belt on the left; 18. Bottom mold on the left Turntable; 19, right bottom mold turntable; 20, ultrasonic welding head; 21, welding head mounting beam; 22, upper center wheel; 23, lower center wheel; 24, upper planetary gear; 25, lower planetary gear; 26, turntable bracket; 27, wedge; 28, ultrasonic transducer; 29, welding head; 30, amplitude transformer; 31, upper buffer spring; 32, beam connecting arm; 33, lower buffer spring; 34, bottom mold beam; 35, driving cylinder; 36, sawtooth cutter; 37, bottom mold; 38, Bottom mold mating surface; 39, drive gear; 40, transmission gear; 41, front swing arm; 42, rear swing arm; 43, front rack; 44, rear rack; 45, height adjustment pin; 46, height adjustment vertical rod; 47, rack bracket; 48, rack gear; 49, front hinge rod; 50, rear hinge rod; 51, hinge rod hinge axis; 52, corner plug; 53, corner plug drive shaft; 54, triangular corner plug plate; 55, spacing adjustment track; 56, height adjustment slot; 57, corner plug control Control track; 58. Corner plug control surface; 59. Packaging bag; 60. Front corner plug; 61. Rear corner plug; 62. Hinge hole; 63. Corner plug rotating shaft; 64. Cutter avoidance groove; 65. Welding part; 66. Cutter channel; 67. Control surface straight section; 68. Control surface arc section; 69. Transition surface; 70. Common axis; 71. Low section; 72. High section; 73. Corner plug position; 74. Upper U-shaped track; 75. Lower U-shaped track; 76. Left handwheel; 77. Right handwheel. DETAILED DESCRIPTION
[0014] In order to make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in various different configurations.
[0015] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely intended to represent selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.
[0016] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.
[0017] The features and performance of the present invention are further described in detail below with reference to the embodiments.
[0018] In the present invention, a packaging bag conveying mechanism capable of achieving a reduced distance to match the end seal is provided in embodiment 1: Figures 1 to 36 As shown, In this embodiment Figure 1 The invention relates to a packaging bag conveying mechanism capable of achieving a shortened distance to match the end seal and a differential gear ultrasonic end sealing mechanism for ultrasonically sealing the ends of the packaging bags. The differential gear ultrasonic end sealing mechanism is used in conjunction with the packaging bag conveying mechanism.
[0019] The packaging bag conveying mechanism is a packaging bag conveying mechanism that can adjust the packaging bag conveying spacing. The packaging bag conveying mechanism includes a conveying frame 1, on which a left conveying mechanism 2 and a right conveying mechanism 3 are arranged symmetrically on the left and right. The left conveying mechanism 2 and the right conveying mechanism 3 both include a driving gear 39 whose axis extends in the up and down direction, wherein the driving gear 39 positioned in the front is called the front driving gear, and the driving gear positioned in the rear is called the rear driving gear. The two front driving gears or the two rear driving gears are active gears driven by a power motor, and the two front driving gears have the same rotation speed and are opposite in direction.
[0020] The left conveying mechanism and the right conveying mechanism are symmetrically arranged, so in the present invention, only the structure of the conveying mechanism on one side is described in detail.
[0021] Taking the left conveyor mechanism as an example, the left conveyor mechanism includes multiple output troughs 7 spaced apart along the circumference. The conveyor troughs 7 are generally U-shaped. The bottom of the trough bottom plate of the conveyor trough 7 is provided with transmission teeth 40. Two adjacent conveyor troughs are defined as the front conveyor trough and the rear conveyor trough. The transmission teeth on the front conveyor trough are the front transmission teeth, and the transmission teeth on the rear conveyor trough are the rear transmission teeth. The transmission teeth 40 are used to mesh with the teeth of the corresponding drive gear for transmission. In the present invention, whether it is the front transmission teeth or the rear transmission teeth, the drive gear meshes with at least two adjacent transmission teeth for transmission.
[0022] The connection between the front conveyor trough and the rear conveyor trough is as follows: Figures 15 and 16 As shown: On the trough bottom plates of the front conveying trough and the rear conveying trough, rocker arms are hinged on the front and rear sides of the corresponding transmission racks, and the hinge axes of the rocker arms are extended in the up-down direction. The adjacent rocker arms on the front conveying trough and the rear conveying trough are respectively called the front rocker arm 41 and the rear rocker arm 42. The upper end of the front rocker arm 41 is hinged with a front rack 43 with an axis extending in the up-down direction, and the upper end of the rear rocker arm 42 is hinged with a rear rack 44 with an axis extending in the up-down direction. The adjacent ends of the front rack 43 and the rear rack 44 are mounted on the rack bracket 47. The rack bracket is a sleeve-shaped structure. Rack gears 48 are provided on the opposite sides of the front rack and the rear rack in the rack bracket. The opposite sides of the rack gear 48 are respectively engaged with the front rack 43 and the rear rack 44 for transmission. By cooperating with the rack and the front rack 43 and the rear rack 44 , the initial spacing between two adjacent conveying troughs can be adjusted, while also ensuring the consistency of the movements of the front swing arm 43 and the rear swing arm 44 .
[0023] A height adjustment vertical rod 46 is slidably mounted in the center of the rack gear in the up-down direction. The upper and lower ends of the height adjustment vertical rod 46 pass through the upper and lower ends of the rack bracket. A horizontally arranged height adjustment pin 45 is fixed to the upper end of the height adjustment vertical rod 46. A hinge rod hinge shaft 51 is fixed to the bottom of the height adjustment vertical rod 46.
[0024] The front conveying trough is also hinged with a front hinged rod 49 with a horizontal axis, and the rear conveying trough is also hinged with a rear hinged rod 50 with a horizontal axis. The adjacent ends of the front hinged rod 49 and the rear hinged rod 50 are provided with coaxial hinge holes, and the hinge shaft 51 of the hinge rod is passed through the hinge hole. The length of the hinge hole is shorter than the length of the hinge shaft of the hinge rod. Therefore, the front hinge rod 49 and the rear hinge rod 50 can move in the axial direction of the hinge shaft of the hinge rod relative to the hinge shaft of the hinge rod.
[0025] A spacing adjustment track 55 is fixed to the conveyor frame. The spacing adjustment track includes a waist-shaped adjustment track body. The outer surface of the adjustment track body is provided with a height adjustment slot 56 that is closed along the circumference of the adjustment track body. The bottom of the height adjustment slot faces upward, and the bottom of the height adjustment pin 45 at the upper end of the height adjustment vertical rod 46 contacts and slides with the bottom of the height adjustment slot 56. In the entire circumference, the height adjustment slot has a low section 71 and a high section 72. When the height adjustment pin 45 slides to the high section 72, the height adjustment vertical rod pulls the adjacent ends of the front hinge rod and the rear hinge rod upward through the hinge shaft, approaching the horizontal posture of the front hinge rod and the rear hinge rod, so that the spacing between the two adjacent front output troughs and the rear conveying trough will increase; when the height adjustment pin 45 slides to the low section, under the action of its own weight (or spring), the adjacent ends of the front hinge rod and the rear hinge rod move downward, as shown in FIG. Figure 24 As shown, the distance between two adjacent front output slots and rear output slots will become smaller, which means that the distance between two adjacent packaging bags here is shortened, making it easier to perform ultrasonic end sealing operations.
[0026] For the left conveying mechanism or the right conveying mechanism, it includes an upper U-shaped rail 74 and a lower U-shaped rail 75. A guide groove is formed between the upper U-shaped rail 74 and the lower U-shaped rail 75. The transmission gear on the conveying trough 7 is guided and moved and assembled in the guide groove. The upper U-shaped rail 74 and the lower U-shaped rail 75 are used to limit the height of the conveying trough. At the same time, the corresponding conveying mechanism also includes a left handwheel 76 and a right handwheel 77. The left handwheel 77 is connected to a vertically arranged left lead screw, and the right handwheel 77 is connected to a vertically arranged right lead screw. The left lead screw is connected to the upper U-shaped rail. Rotating the left lead screw can adjust the height of the upper U-shaped rail. The right lead screw is connected to the lower U-shaped rail. Rotating the right lead screw can adjust the height of the lower U-shaped rail, which facilitates the installation of the conveying trough and the overall height adjustment of the assembly.
[0027] When performing ultrasonic end sealing, it is also necessary to form a corner plug position 73 at the end of the packaging bag. In order to achieve this function, a corresponding corner plug 52 is provided on the conveying trough. In this embodiment, the corner plug includes a front corner plug 60 hinged to the rear end of the front conveying trough and a rear corner plug 61 hinged to the front end of the rear conveying trough. The front corner plug 60 and the rear corner plug 61 are as shown in FIG. Figure 28 、 Figure 29 As shown, both the front corner insert 60 and the rear corner insert 61 include a corner insert shaft 63, an upper mounting arm fixed to the upper end of the shaft, and a lower mounting arm fixed to the lower end of the shaft. The upper mounting arm is perpendicular to the corner insert shaft 63, while the lower mounting arm is perpendicular to the shaft, with the upper and lower mounting arms oriented in different directions. A triangular corner insert plate 54 is fixed to the end of the upper mounting arm, away from the shaft; a vertically mounted corner insert drive shaft 53 is fixed to the end of the lower mounting arm, away from the shaft.
[0028] A corner plug control track 57 located on the lower side of the spacing adjustment track is fixed on the conveyor frame. The corner plug control track 57 includes a control track body with a waist-shaped structure. A circumferentially closed corner plug control surface 58 is provided on the upper end surface of the control track body. The corner plug control surface 58 includes a control surface straight line segment 67 extending along the front-to-back direction and a control surface arc segment 68 provided at the end of the control track body. The control surface straight line segment 67 and the control surface arc segment 68 are connected by a transition surface 69.
[0029] When the packaging bag enters the ultrasonic end sealing position, the lower ends of the corner plug drive shafts 53 of the front corner plug 60 and the rear corner plug 61 are in contact and sliding cooperation with the straight section 67 of the control surface. Figure 25 As shown, the triangular corner plug-in plates 54 of the front corner plug-in and the rear corner plug-in are pressed into the end of the packaging bag, thereby forming a corner plug-in structure of the packaging bag. After the ultrasonic end face is encapsulated, as the packaging bag continues to be conveyed, the corner plug-in drive shaft 53 of the corresponding corner plug-in will move to the control surface arc segment 68 through the transition surface 69. In this process, under the pushing action of the corner plug-in control track 57, the front corner plug-in 60 and the rear corner plug-in 61 will swing around their own rotation axis, so that the triangular corner plug-in plates 54 of the front corner plug-in are rotated out from the corresponding packaging bag corner plug-in structure, and the triangular corner plug-in plates of the rear corner plug-in are rotated out from the corresponding packaging bag corner plug-in structure, so as to avoid the triangular corner plug-in plates from hooking the corner position at the exit position, i.e., the arc position at both ends of the corner plug-in control track, and moving away from the corner plug-in position 73 of the packaging bag along the waist-shaped track.
[0030] The ultrasonic end sealing mechanism of the differential gear train comprises a mechanism frame, on which an ultrasonic welding head mechanism and a bottom mold mechanism are arranged in an upper and lower manner.
[0031] As for the ultrasonic welding head mechanism, the ultrasonic welding head mechanism includes a left welding head turntable 5 and a right welding head turntable 11 arranged at intervals on the left and right. The left welding head turntable 5 and the right welding head turntable 11 are driven by a turntable driving mechanism and rotate synchronously. As for the bottom mold mechanism, it includes a left bottom mold turntable 18 and a right bottom mold turntable 19 arranged at intervals on the left and right. The left bottom mold turntable 18 and the right bottom mold turntable 19 are also driven by a turntable driving mechanism, thereby realizing that the left welding head turntable 5, the right welding head turntable 11, the left bottom mold turntable 18, and the right bottom mold turntable 19 rotate at the same speed, the left welding head turntable rotates in the opposite direction to the left bottom mold turntable, and the right welding head turntable rotates in the opposite direction to the right bottom mold turntable.
[0032] In this embodiment, the turntable drive mechanism includes a main drive motor 8. The left welding head turntable 5 and the left bottom mold turntable 18 are connected via a left first drive belt 16. The right welding head turntable 11 and the right bottom mold turntable 19 are connected via a right first drive belt 13. The main drive motor 8 is connected to the left first drive belt 16 and the right first drive belt 13 via a drive shaft.
[0033] The ultrasonic horn mechanism also includes three ultrasonic horns 20 spaced apart along the circumference. Each ultrasonic horn is mounted on a corresponding horn mounting beam 21. The ultrasonic horn 20 includes a welding head 29, an ultrasonic transducer 28 connected to the welding head 29, and an amplitude transformer 30. The welding head 29 is provided with a cutter avoidance groove 64, and weld portions 65 are formed on both sides of the cutter avoidance groove 64. An upper buffer spring 31 is provided between the horn mounting beam 21 and the ultrasonic horn 20.
[0034] The left welding head turntable 5 and the right welding head turntable 11 are rotatably provided with a rotating shaft for connecting to the end of the corresponding welding head mounting beam, and the upper planetary gear 24 is fixed on the rotating shaft. The upper planetary gears 24 on the same welding head turntable are connected by a first planetary gear transmission belt 10. The mechanism frame is also provided with a posture adjustment mechanism connected to the corresponding upper planetary gear 24. During the rotation of the welding head mounting beam 21 with the left welding head turntable 5 and the right welding head turntable 11, the axis of the ultrasonic transducer 28 is vertically downward, and the welding head of the ultrasonic welding head mechanism that rotates to near the lowest position cooperates with the corresponding bottom mold mechanism to complete the end sealing of the packaging bag.
[0035] In this embodiment, the center positions of the left welding head turntable and the right welding head turntable are rotatably equipped with an upper center wheel 22, and the upper center wheel 22 is connected to the corresponding first planetary gear transmission belt 10. An upper transmission disk 6 is fixed coaxially on the upper center wheel 22, and the posture adjustment mechanism is connected to the corresponding upper planetary gear 24 through the upper transmission disk 6, the upper center wheel 22 and the first planetary gear transmission belt 10.
[0036] The bottom mold mechanism includes a bottom 37 corresponding to the number of ultrasonic welding heads, and lower planetary gears 25 corresponding to the number of bottom molds are rotatably arranged on the left bottom mold turntable 18 and the right bottom mold turntable 19. The bottom mold is installed on the bottom mold crossbeam 34, and the two ends of the bottom mold crossbeam 34 are connected to the corresponding lower planetary gears 25. The lower planetary gears 25 of the same bottom mold turntable are connected by a second planetary gear transmission belt 15. The bottom mold has a bottom mold mating surface 38 that cooperates with the corresponding welding head. When the bottom mold rotates with the left bottom mold turntable and the right bottom mold turntable, the bottom mold mating surface 38 faces upward.
[0037] A cutter channel 66 is provided at the center of the bottom mold. A serrated cutter 36 that can move up and down is provided in the cutter channel 66 . The serrated cutter 36 is driven by a driving cylinder 35 to move up and down.
[0038] The left bottom mold turntable 18 and the right bottom mold turntable 19 are centrally rotated with a lower center wheel 23, which is connected to the corresponding second planetary gear transmission belt 15. The lower transmission wheel 14 is coaxially fixed on the lower center wheel 23, and the posture adjustment mechanism is connected to the upper center wheel and the lower center wheel on the left through the left second transmission belt 17; the posture adjustment mechanism is connected to the upper center wheel and the lower center wheel on the right through the right second transmission belt 12.
[0039] In this embodiment, the posture adjustment mechanism includes a posture adjustment motor 9, which is connected to the posture adjustment motor 9 through a transmission shaft, a second transmission belt 17 on the left side, and a second transmission belt 12 on the right side. In this embodiment, a common shaft 70 with an axis extending in the left-right direction is provided on the mechanism frame. Reversing gears are rotatably mounted at both ends of the common shaft 70. The left first transmission belt 16 is reversed by one of the reversing gears, and the left second transmission belt 17 is reversed by another reversing gear. There are two common shafts between the left first transmission belt and the left second transmission belt, and the two common shafts are spaced apart in front and back. There are also two common shafts between the right first transmission belt and the right second transmission belt, and the two common shafts are spaced apart in front and back.
[0040] When in normal working state, the output shaft of the posture adjustment motor is locked, the planetary gear is driven by the center gear with equal number of teeth, the ultrasonic welding head always maintains a vertical posture, and the ultrasonic welding head rotated to the lowest position cooperates with the bottom mold to complete the end sealing of the packaging bag. As the packaging bag continues to be conveyed, each ultrasonic welding head rotates in turn to complete the ultrasonic packaging of the corresponding packaging bag. The rotation direction of the left welding head turntable and the right welding head turntable is consistent and continuous, which can improve the packaging efficiency.
[0041] The use process of the packaging machine of the present invention is as follows Figure 12As shown: the material is longitudinally sealed after being unwound through the film wrapping, and the longitudinally sealed material is conveyed between the left conveying mechanism and the right conveying mechanism. Each material is stuck in the conveying trough between the left conveying mechanism and the right conveying mechanism and is conveyed. During this process, under the action of the corner plug control track, the triangular corner plug plates of the front corner plug and the rear corner plug press the packaging bag, so that the packaging bag corner plug structure is formed at both ends of the packaging bag, corresponding to Figure 12 As the packaging bag continues to be transported, when the packaging bag is transported to the front of the ultrasonic end sealing mechanism station of the differential gear system, the height adjustment pin cooperates with the lower section of the height adjustment slot. Under the action of deadweight, the adjacent ends of the front hinge rod and the rear hinge rod move downward, such as Figure 24 As shown in the figure, the distance between the two adjacent front output slots and the rear output slots will become smaller, thereby pulling the two adjacent packaging bags closer together. Figure 12 The reduction distance in the middle is prepared for ultrasonic packaging, and then the ultrasonic welding head cooperates with the bottom mold to complete the end packaging of the packaging bag, corresponding to Figure 12 The ultrasonic transverse seal is then performed, and then the sawtooth cutter moves upward to cut the two adjacent packaging bags. Figure 12 As the conveying continues, when the height adjustment pin cooperates with the high section of the height adjustment slot, the adjacent ends of the front hinge rod and the rear hinge rod move upward, and the distance between the two adjacent front output slots and the rear output slots will be expanded, thereby expanding the distance between the two adjacent packaging bags. Figure 12 The expansion distance in .
[0042] When the conveying trough moves to the arc section of the driving gear at both ends of the conveying mechanism, under the action of the height adjustment groove, the adjacent ends of the front hinged rod and the rear hinged rod move downward, and the distance between the two adjacent conveying troughs is close, which facilitates the smooth engagement of the fan-shaped transmission gear ring 40 with the driving gear 39 through the arc section at both ends of the conveying mechanism. In this process, the front rocker arm and the rear rocker arm swing to make adaptive adjustments. At the same time, the hinge hole 62 can move along the front hinged rod 49 and the rear hinged rod 50 relative to the hinge axis of the hinge rod in the axial direction of the hinge axis toward the radial outside of the arc section of the driving gear to prevent the components from getting stuck.
[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall be included in the scope of protection of the present invention.
Claims
1. A packaging bag conveying mechanism capable of achieving a reduced distance to match an end seal, comprising a left conveying mechanism and a right conveying mechanism, wherein each of the left conveying mechanism and the right conveying mechanism comprises a plurality of conveying troughs spaced apart along the circumference, wherein two adjacent conveying troughs in the front-to-back direction are referred to as a front conveying trough and a rear conveying trough, and wherein: The front and rear sides of the trough bottom plates of the front and rear conveying troughs are hinged with swing arms, and the hinge axes of the swing arms are extended in the up-down direction. The adjacent swing arms on the front and rear conveying troughs are respectively called the front swing arms and the rear swing arms. The upper end of the front swing arm is hinged with a front rack with an axis extending in the up-down direction, and the upper end of the rear swing arm is hinged with a rear rack with an axis extending in the up-down direction. The adjacent ends of the front rack and the rear rack are mounted on the rack bracket, and rack gears are arranged on opposite sides of the front rack and the rear rack in the rack bracket. The opposite sides of the rack gears are respectively engaged with the front rack and the rear rack for transmission, and a height adjustment vertical rod is mounted on the center of the rack gear in a sliding manner in the up-down direction. A height adjustment pin is fixed at the upper end, and a hinged rod hinge shaft is fixed at the bottom of the height adjustment vertical rod. A front hinged rod with a horizontally arranged axis is also hinged on the front conveying trough, and a rear hinged rod with a horizontally arranged axis is also hinged on the rear conveying trough. The adjacent ends of the front hinged rod and the rear hinged rod are provided with hinge holes arranged coaxially, and the hinge shaft of the hinged rod is passed through the hinge holes. The packaging bag conveying mechanism also includes a spacing adjustment track, and the spacing adjustment track includes an adjustment track body with a waist-shaped structure. A height adjustment groove closed along the circumference of the adjustment track body is provided on the outer side surface of the adjustment track body. The bottom circumference of the height adjustment pin is in contact and guided with the bottom of the height adjustment groove, and the height adjustment groove has a low section and a high section.
2. The packaging bag conveying mechanism according to claim 1, characterized in that: The length of the hinge hole is shorter than the length of the hinge shaft of the hinge rod, so the front hinge rod and the rear hinge rod can move in the axial direction of the hinge shaft of the hinge rod relative to the hinge shaft of the hinge rod.
3. The packaging bag conveying mechanism according to claim 1, characterized in that: The rack bracket is a sleeve-shaped structure, and the upper and lower ends of the height adjustment vertical rod pass through the upper and lower ends of the rack bracket.
4. The packaging bag conveying mechanism according to claim 1, characterized in that: The axes of the height adjustment pin shaft and the hinge shaft of the hinge rod are extended along the left-right direction.
5. The packaging bag conveying mechanism according to any one of claims 1 to 4, characterized in that: The left conveying mechanism and the right conveying mechanism include a front drive gear and a rear drive gear whose axes extend in the up and down directions. The bottom of the output groove is provided with transmission teeth for engaging and transmitting with the corresponding drive gears. The drive gear engages and transmits with at least two adjacent transmission teeth at the same time.
6. The packaging bag conveying mechanism according to claim 5, characterized in that: The two rocker arms corresponding to one conveying trough are located at the front and rear sides of the transmission teeth of the conveying trough.