Plastic bag conveying tension adjusting mechanism of bag making machine
By introducing a rotating assembly of a worm gear reduction motor and a torque sensor into the bag-making machine, combined with the design of a flip plate and a tensioning roller, the problems of inconvenience and poor adjustment accuracy of the bag-making machine's tensioning mechanism during film threading are solved, achieving high-precision tension adjustment and safe film tensioning.
Patent Information
- Application Number
- CN202422719102.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-11-07
AI Technical Summary
The tensioning mechanism of the existing bag-making machine is inconvenient during the film threading process and has poor tension adjustment accuracy, which easily leads to excessive tensioning or breaking of the film.
It uses a rotating assembly including a worm gear reduction motor and a torque sensor, combined with a flip plate and tensioning roller design to automatically adjust the tension of the plastic bag. The adjustment range is expanded through a manual adjustment assembly to achieve precise tension control.
It makes film threading easy and convenient, and the tension adjustment precision is high, ensuring the film tension is safe and adapting to the tensioning requirements of plastic bags of different materials.
Smart Images
Figure CN223407565U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bag making machines, in particular to a plastic bag conveying tension regulating mechanism of a bag making machine. Background Art
[0002] A bag-making machine is a specialized device used to make plastic packaging bags. It is widely used in the production of packaging bags made of various plastics, paper, and other materials. The existing bag-making machine's packaging bag forming process involves guiding the upper and lower films separately for transportation, overlapping them at appropriate positions, and then heat-sealing the overlapped films longitudinally and transversely to form a single-piece structure with multiple small bags. Finally, the overlapping films are cut to form multiple small bags. The tensioning mechanism in the bag-making machine is a specialized mechanism used to tension the film, facilitate its transportation, heat sealing, and cutting. The tensioning mechanism of a conventional bag-making machine typically consists of multiple staggered, fixed, and rotating conveyor rollers, and a freely adjustable tension roller. This structure is not only inconvenient during film threading, but also relies on manual adjustment of the tension roller's height or horizontal position when adjusting the tension. Consequently, the tension adjustment accuracy is poor, making it very easy to over-tension the film or even break it. Utility Model Content
[0003] The utility model aims to provide a plastic bag conveying tension adjustment mechanism for a bag making machine, which has the effects of easy and convenient film threading and high tension adjustment accuracy.
[0004] The above-mentioned technical purpose of the present invention is achieved through the following technical solutions: a plastic bag conveying tension adjustment mechanism of a bag making machine, comprising a frame of the bag making machine, a pair of conveying rollers rotatably arranged on the frame and parallel to each other, a pair of flip plates that are symmetrical to each other and rotatably connected to the frame in the middle, a pair of sliders 1 slidably arranged on the flip plate, a tensioning roller 1 whose two ends are respectively rotatably connected to the two sliders 1 and parallel to the conveying rollers, an adjustment component 1 for controlling and locking the sliding of the slider 1, a pair of sliders 2 slidably arranged on the flip plate, a tensioning roller 2 whose two ends are respectively rotatably connected to the two sliders 2 and parallel to the conveying rollers, an adjustment component 2 for controlling and locking the sliding of the slider 2, and a rotating component for driving the flip plate to rotate around its center, the flip plate is located between the two conveying rollers, and the tensioning roller 1 and the tensioning roller 2 are symmetrically located on both sides of the rotation center of the flip plate.
[0005] The utility model is further configured as follows: a rotating shaft is fixedly provided on the middle portion of the side of the flip plate facing away from the tensioning roller, and the rotating shaft rotates through the frame.
[0006] The present invention is further configured such that the axis center lines of the two conveying rollers and the axis center line of the rotating shaft are at the same height.
[0007] The utility model is further configured as follows: the rotating assembly includes a worm gear reduction motor and a torque sensor, the worm gear reduction motor is fixed to one side of the torque sensor, the other side of the torque sensor is fixedly connected to the frame, and the output end and the rotating shaft of the worm gear reduction motor are respectively connected to the two detection ends inside the torque sensor.
[0008] The utility model is further configured as follows: the adjustment component includes a nut fixed through the middle of a slider, a screw rod rotatably set on the flip plate and threadedly connected to the nut, and a hand crank handle fixedly connected to one end of the screw rod.
[0009] The utility model is further configured as follows: the second adjustment component includes a nut second fixedly passing through the middle of the second slider, a screw rod second rotatably set on the flip plate and threadedly connected to the nut second, and a hand crank handle second fixedly connected to one end of the screw rod second.
[0010] The present invention is further configured as follows: one of the flip plates is located on both sides of the rotating shaft and is provided with a long hole 1; the other flip plate is located on both sides of the rotating shaft and is provided with a long hole 2; the slider 1 and the slider 2 slide in the two long holes 1 or the two long holes 2 respectively; the screw rod 1 and the screw rod 2 are respectively rotatably arranged in the two long holes 1 and are parallel to the long hole 1; the ends of the screw rod 1 and the screw rod 2 away from the rotating shaft are respectively rotated out from the inside of the two long holes 1 and are respectively fixedly connected to the hand crank handle 1 and the hand crank handle 2.
[0011] The present invention is further configured as follows: a fixed guide rod is fixedly provided in each of the two second elongated holes, and the two fixed guide rods pass through a slider first and a slider second sliding in the two second elongated holes respectively.
[0012] The utility model is further configured as follows: a connecting cylinder 1 is fixedly provided on one side opposite to the slider 1, and both ends of the tensioning roller 1 are respectively rotatably plugged into the connecting cylinder 1 on the two sliders 1.
[0013] The utility model is further configured as follows: a connecting tube 2 is fixedly provided on one side opposite to the two sliders, and both ends of the two tensioning rollers are respectively rotatably plugged into the connecting tubes 2 on the two sliders 2.
[0014] The beneficial effect of the utility model is that, by adopting the above-mentioned tension adjustment mechanism, when film needs to be threaded, the worm gear reduction motor is started to drive the rotating shaft, so that the rotating shaft drives the flip plate to rotate, and the tensioning roller 1 and the tensioning roller 2 between the two flip plates will rotate together with the flip plate. When the flip plate rotates to the horizontal, the worm gear reduction motor is turned off, so that the axes of the two conveying rollers, the tensioning roller 1 and the tensioning roller 2 are on the same horizontal plane. At this time, the staff can manually pull one end of the plastic bag film at this height to easily and conveniently pass the plastic bag film through the gap between the rollers and simultaneously place it on each roller.
[0015] When the plastic bag film needs to be tensioned, the worm gear reduction motor is started to drive the rotating shaft, so that the rotating shaft drives the flip plate to rotate from a horizontal position to an inclined position. Since the tensioning roller one and the tensioning roller two are respectively located on both sides of the rotating shaft, the tensioning roller one and the tensioning roller two will change their height positions up and down respectively under the rotation of the flip plate, thereby tensioning the plastic film that has just been pulled through. Finally, when the plastic film has a certain tension force, the torque sensor between the worm gear reduction motor and the rotating shaft will sense the torque increase, and after reaching a certain value, the worm gear reduction motor will automatically shut down, thereby matching the plastic bag film with a more accurate and appropriate tension.
[0016] Among them, if it is necessary to further increase the tension adjustment range, it is only necessary to manually turn the hand crank 1 and the hand crank 2 to make the screw rod 1 and the screw rod 2 in the two long holes 1 rotate respectively, and then the nut 1 and the nut 2, which are respectively threadedly connected to the screw rod 1 and the screw rod 2, will respectively drive the slider 1 and the slider 2 to slide relatively away from the rotation axis. Finally, the tensioning roller 1 and the tensioning roller 2 will be driven by the slider 1 and the slider 2 respectively away from the rotation center of the flip plate, and in this way, the range in which the tensioning roller 1 can be raised and the tensioning roller 2 can be lowered is increased, thereby obtaining a larger tension adjustment range. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0018] Figure 1 2 is a schematic diagram of the operation of this embodiment;
[0019] Figure 2 Schematic diagram of the connection relationship between the turning plate, the first tensioning roller and the second tensioning roller of this embodiment;
[0020] In the figure, 1. frame; 2. conveyor roller; 3. flip plate; 31. rotating shaft; 32. long hole 1; 33. long hole 2; 34. fixed guide rod; 4. slider 1; 41. connecting cylinder 1; 5. tensioning roller 1; 6. adjusting component 1; 61. nut 1; 62. screw rod 1; 63. hand crank handle 1; 7. slider 2; 71. connecting cylinder 2; 8. tensioning roller 2; 9. adjusting component 2; 91. nut 2; 92. screw rod 2; 93. hand crank handle 2; 10. rotating component; 101. worm gear reduction motor; 102. torque sensor. DETAILED DESCRIPTION
[0021] The following will clearly and completely describe the technical solutions of the present invention in conjunction with specific embodiments. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.
[0022] Example: A plastic bag conveying tension adjustment mechanism for a bag making machine, such as Figure 1 、 Figure 2 As shown, it includes a frame 1 of a bag making machine, a pair of conveying rollers 2 rotatably arranged on the frame 1 and parallel to each other, a pair of flip plates 3 that are symmetrical to each other and rotatably connected to the frame 1 in the middle, a pair of sliders 4 slidably arranged on the flip plate 3, a tensioning roller 5 whose two ends are respectively rotatably connected to the two sliders 4 and parallel to the conveying roller 2, an adjusting component 6 for controlling and locking the sliding of a slider 4, a pair of sliders 2 slidably arranged on the flip plate 3, a tensioning roller 2 8 whose two ends are respectively rotatably connected to the two sliders 2 7 and parallel to the conveying roller 2, an adjusting component 2 9 for controlling and locking the sliding of a slider 2 7, and a rotating component 10 for driving the flip plate 3 to rotate around its center, the flip plate 3 is located between the two conveying rollers 2, the tensioning roller 5 and the tensioning roller 2 8 are symmetrically located on both sides of the rotation center of the flip plate 3, and a rotating shaft 31 is fixedly provided in the middle of the side of the flip plate 3 facing away from the tensioning roller 5, and the rotating shaft 31 rotates through the frame 1.
[0023] Furthermore, the heights of the axis lines of the two conveying rollers 2 and the axis line of the rotating shaft 31 are the same, and under certain conditions, the tensioning roller 1 5, the tensioning roller 2 8 and the conveying roller 2 can be at the same height position to facilitate the staff to perform film threading work.
[0024] Furthermore, the rotating assembly 10 includes a worm gear reduction motor 101 and a torque sensor 102. The worm gear reduction motor 101 is fixed to one side of the torque sensor 102, and the other side of the torque sensor 102 is fixedly connected to the frame 1. The output end of the worm gear reduction motor 101 and the rotating shaft 31 are respectively connected to the two detection ends inside the torque sensor 102. By adopting the above-mentioned rotating assembly 10, not only can the tension of the plastic film be automatically adjusted by driving the rotating shaft 31 to rotate, but in conjunction with the torque sensor 102, the tension of the plastic film can also be actively matched to the appropriate tension during the adjustment process to ensure the safe tensioning of the plastic film.
[0025] Furthermore, the adjustment assembly 6 comprises a nut 61 fixedly extending through the middle of the slider 4, a screw 62 rotatably mounted on the flip plate 3 and threadedly connected to the nut 61, and a hand crank 63 fixedly connected to one end of the screw 62. The adjustment assembly 9 comprises a nut 91 fixedly extending through the middle of the slider 7, a screw 92 rotatably mounted on the flip plate 3 and threadedly connected to the nut 91, and a hand crank 93 fixedly connected to one end of the screw 92. By employing these adjustment assemblies 6 and 9, the tension adjustment range can be further expanded or narrowed according to tension requirements, thereby quickly adapting to the tensioning of plastic bag films of different materials.
[0026] Furthermore, one of the flip plates 3 is provided with a strip hole 1 32 on both sides of the rotating shaft 31, and the other flip plate 3 is provided with a strip hole 2 33 on both sides of the rotating shaft 31. The slider 1 4 and the slider 2 7 slide in the two strip holes 1 32 or the two strip holes 2 33 respectively. The screw rod 1 62 and the screw rod 2 92 are respectively rotatably set in the two strip holes 1 32 and are parallel to the strip holes 1 32. The ends of the screw rod 1 62 and the screw rod 2 92 away from the rotating shaft 31 are respectively rotated out from the inside of the two strip holes 1 32 and are respectively fixedly connected to the hand crank handle 1 63 and the hand crank handle 2 93; fixed guide rods 34 are respectively fixed in the two strip holes 2 33, and the two fixed guide rods 34 respectively pass through the slider 1 4 and the slider 2 7 sliding in the two strip holes 2 33. By adopting the above-mentioned long hole 1 32 and long hole 2 33, not only can sliding space be provided for slider 1 4 and slider 2 7, but also in combination with screw rod 1 62, screw rod 2 92 and fixed guide rod 34, the stable sliding of slider 1 4 and slider 2 7 can be guaranteed.
[0027] Furthermore, a connecting tube 1 41 is fixedly provided on one side opposite the slider 1 4, and the two ends of the tensioning roller 1 5 are respectively rotatably connected to the connecting tubes 1 41 on the two sliders 1 4. A connecting tube 2 71 is fixedly provided on one side opposite the slider 2 7, and the two ends of the tensioning roller 2 8 are respectively rotatably connected to the connecting tubes 2 71 on the two sliders 2 7. The use of the above connecting tube 1 41 and connecting tube 2 71 not only stably supports the rotation of the tensioning roller 1 5 and the tensioning roller 2 8, but also facilitates the disassembly and assembly of the tensioning roller 1 5 and the tensioning roller 2 8 by the staff.
[0028] The working principle of this embodiment is as follows:
[0029] When film threading is required, the worm gear reduction motor 101 is started to drive the rotating shaft 31, so that the rotating shaft 31 drives the flip plate 3 to rotate, and the tensioning roller 1 5 and the tensioning roller 2 8 between the two flip plates 3 will rotate together with the flip plate 3. When the flip plate 3 rotates to the horizontal, the worm gear reduction motor 101 is turned off, so that the axes of the two conveying rollers 2, the tensioning roller 1 5 and the tensioning roller 2 8 are on the same horizontal plane. At this time, the staff can manually pull one end of the plastic bag film at this height to easily and conveniently pass the plastic bag film through the gap between the rollers and place it on each roller at the same time;
[0030] When the plastic bag film needs to be tensioned, the worm gear reduction motor 101 is started to drive the rotating shaft 31, so that the rotating shaft 31 drives the flip plate 3 to rotate from a horizontal position to an inclined position. Since the tensioning roller 1 5 and the tensioning roller 2 8 are respectively located on both sides of the rotating shaft 31, the tensioning roller 1 5 and the tensioning roller 2 8 will change their height positions up and down under the rotation of the flip plate 3, thereby tensioning the plastic film that has just been pulled through. Finally, when the plastic film has a certain tension force, the torque sensor 102 between the worm gear reduction motor 101 and the rotating shaft 31 will sense the increase in torque, and after reaching a certain value, the worm gear reduction motor 101 will be automatically shut down, thereby matching the plastic bag film with a more accurate and appropriate tension.
[0031] Among them, if it is necessary to further increase the tension adjustment range, it is only necessary to manually turn the hand crank 1 and the hand crank 2 to make the screw rod 1 62 and the screw rod 2 92 in the two long holes 1 32 rotate respectively, and then the nut 1 61 and the nut 2 91 threadedly connected to the screw rod 1 62 and the screw rod 2 92 respectively will respectively drive the slider 1 4 and the slider 2 7 to slide relatively away from the rotation axis 31. Finally, the tensioning roller 1 5 and the tensioning roller 2 8 will be driven by the slider 1 4 and the slider 2 7 respectively to move away from the rotation center of the flip plate 3, and in this way, the range in which the tensioning roller 1 5 can be raised and the range in which the tensioning roller 2 8 can be lowered will be increased, thereby obtaining a larger tension adjustment range.
Claims
1. A plastic bag conveying tension adjustment mechanism for a bag making machine, characterized in that: The invention comprises a frame (1) of a bag making machine, a pair of conveying rollers (2) rotatably arranged on the frame (1) and parallel to each other, a pair of turning plates (3) symmetrically connected to the frame (1) in the middle, a pair of sliders (4) slidably arranged on the turning plate (3), a tensioning roller (5) whose two ends are respectively rotatably connected to the two sliders (4) and parallel to the conveying roller (2), an adjusting component (6) for controlling and locking the sliding of the slider (4), a pair of sliders (7) slidably arranged on the turning plate (3), a tensioning roller (8) whose two ends are respectively rotatably connected to the two sliders (7) and parallel to the conveying roller (2), an adjusting component (9) for controlling and locking the sliding of the slider (7), and a rotating component (10) for driving the turning plate (3) to rotate around its center, wherein the turning plate (3) is located between the two conveying rollers (2), and the tensioning roller (5) and the tensioning roller (8) are symmetrically located on both sides of the rotation center of the turning plate (3).
2. The plastic bag conveying tension adjustment mechanism of a bag making machine according to claim 1, characterized in that: A rotating shaft (31) is fixedly provided in the middle of the side of the flip plate (3) facing away from the tensioning roller (5), and the rotating shaft (31) rotates through the frame (1).
3. The plastic bag conveying tension adjustment mechanism of a bag making machine according to claim 1, characterized in that: The heights of the axis centers of the two conveying rollers (2) and the axis center line of the rotating shaft (31) are the same.
4. The plastic bag conveying tension adjustment mechanism for a bag making machine according to claim 2, characterized in that: The rotating assembly (10) includes a worm gear reduction motor (101) and a torque sensor (102), wherein the worm gear reduction motor (101) is fixed to one side of the torque sensor (102), and the other side of the torque sensor (102) is fixedly connected to the frame (1), and the output end of the worm gear reduction motor (101) and the rotating shaft (31) are respectively connected to two detection ends inside the torque sensor (102).
5. The plastic bag conveying tension adjustment mechanism for a bag making machine according to claim 1, characterized in that: The adjusting assembly (6) includes a nut (61) fixedly passing through the middle of the slider (4), a screw (62) rotatably arranged on the flip plate (3) and threadedly connected to the nut (61), and a hand crank (63) fixedly connected to one end of the screw (62).
6. The plastic bag conveying tension adjustment mechanism for a bag making machine according to claim 5, characterized in that: The regulating assembly 2 (9) comprises a nut 2 (91) fixedly passing through the middle of the slider 2 (7), a screw rod 2 (92) rotatably arranged on the flip plate (3) and threadedly connected to the nut 2 (91), and a hand crank handle 2 (93) fixedly connected to one end of the screw rod 2 (92).
7. The plastic bag conveying tension adjustment mechanism for a bag making machine according to claim 6, characterized in that: One of the flip plates (3) is located on both sides of the rotating shaft (31) and is provided with a long hole (32), and the other flip plate (3) is located on both sides of the rotating shaft (31) and is provided with a long hole (33). The slider (4) and the slider (7) slide in the two long holes (32) or the two long holes (33), respectively. The screw rod (62) and the screw rod (92) are respectively rotatably arranged in the two long holes (32) and are parallel to the long hole (32). The ends of the screw rod (62) and the screw rod (92) away from the rotating shaft (31) are respectively rotated out from the inside of the two long holes (32) and are fixedly connected to the hand crank handle (63) and the hand crank handle (93).
8. The plastic bag conveying tension adjustment mechanism for a bag making machine according to claim 7, characterized in that: A fixed guide rod (34) is fixedly provided in each of the two second long holes (33), and the two fixed guide rods (34) respectively pass through a slider (4) and a slider (7) sliding in each of the second long holes (33).
9. The plastic bag conveying tension adjustment mechanism for a bag making machine according to claim 1, characterized in that: A connecting tube (41) is fixedly provided on one side opposite to the slider (4), and the two ends of the tensioning roller (5) are respectively rotatably connected to the connecting tubes (41) on the two sliders (4).
10. The plastic bag conveying tension adjustment mechanism of a bag making machine according to claim 9, characterized in that: A connecting tube 2 (71) is fixedly provided on one side opposite to the second slider (7), and the two ends of the second tensioning roller (8) are respectively rotatably connected to the connecting tubes 2 (71) on the two second sliders (7).