A packaging bag folding mechanism

Abstract

This invention discloses a packaging bag folding mechanism, comprising a frame with a support mechanism for supporting the packaging bag and being retractable to avoid obstruction; a bag ear folding mechanism including a translation worktable, ear plates, and a pressure plate; the translation worktable moving along the length of the frame, with two sets of ear plates arranged along the length of the translation worktable; the pressure plate located above the ear plates; and a pressing component on the translation worktable that drives the pressure plate to move vertically; and a bag body folding mechanism including a positioning block, a stacking plate, and a fixing plate. The positioning block is located at one end of the frame and has a discharge port opened laterally; the fixing plate is located directly above the positioning block; a second moving component on the frame that drives the fixing plate to move; the stacking plate located on the side of the positioning block near the lifting support platform; a third moving component on the frame that drives the stacking plate; and a pusher plate adapted to the discharge port on the side of the stacking plate near the positioning block. This application facilitates the folding of packaging bags of different sizes.

Description

Technical Field

[0001] This invention relates to the field of bag folding devices, and more particularly to a bag folding mechanism. Background Technology

[0002] Packaging bags are typically made of plastic and are a convenient packaging material. A common packaging bag consists of a bag body and two loops fixed to the opening of the bag body, which are used to lift the bag during use. During production and transportation, packaging bags are usually folded and bundled in batches to prevent them from scattering.

[0003] When folding packaging bags, for bags with handles, existing bag-folding equipment typically first bends the two handles towards the bag body, then folds the bag body and handles together and presses them tightly for subsequent binding. However, for packaging bags of different sizes, the number of folds and the method of folding vary. Therefore, when folding packaging bags of different sizes, it is necessary to adjust the movement trajectory and dimensions of the bag-folding mechanism.

[0004] Regarding the aforementioned technologies, when folding packaging bags of different sizes, it is necessary to manually adjust the overall movement trajectory of the folding mechanism, which takes a certain amount of time, making it inconvenient when folding packaging bags of different specifications. Summary of the Invention

[0005] To facilitate the folding of packaging bags of different sizes, this application provides a packaging bag folding mechanism.

[0006] This application provides a packaging bag folding mechanism, which adopts the following technical solution:

[0007] A packaging bag folding mechanism includes a frame, the frame further comprising: a support mechanism, the support mechanism including a lifting support platform, a telescopic plate, and two sets of support plates; the lifting support platform moves up and down along the height direction of the frame; the telescopic plate is horizontally positioned in front of the lifting support platform; the lifting support platform is provided with a driving component that drives the telescopic plate to extend and retract; both support plates are located at the upper end of the telescopic plate and move with the telescopic plate; the two support plates are symmetrically arranged; the telescopic plate is provided with a moving component that drives the two support plates closer or further apart; a baffle is provided on the side of the two support plates that approaches each other; the baffles of the two support plates are staggered; and a bag ear folding mechanism including a translation worktable, an ear folding plate, and a pressure plate; the translation worktable moves along the length direction of the frame; the ear folding plate is located on the translation worktable near the lifting support platform. Two sets of folding plates are provided on one side of the lifting support platform. Both sets of folding plates move along the length of the translation worktable. The pressure plate corresponds to each folding plate and moves along the translation worktable with the folding plates. The translation worktable is provided with a pressing component that moves the pressure plate closer to or away from the folding plates. The bag folding mechanism includes a positioning block, a stacking plate, and a fixing plate. The positioning block is fixedly connected to the end of the frame away from the lifting support platform. The positioning block has a discharge port that is compatible with the packaging bag and is opened laterally. The fixing plate is located directly above the positioning block. The frame is provided with a second moving component that moves the fixing plate up, down, forward, and backward. The stacking plate is located on the side of the positioning block that is close to the lifting support platform. The frame is provided with a third moving component that moves the stacking plate up, down, forward, and backward. The side of the stacking plate that is close to the positioning block is provided with a pusher plate that is compatible with the discharge port.

[0008] By adopting the above technical solution, in the initial state, the telescopic plate drives the support plate to extend, placing the packaged bag on top of the support plate. The two support plates support the packaged bag through baffles, and the two bag ears of the packaged bag are located on the outside of the support plates. The translation worktable is located on the side of the lifting support platform with the support plate. In the initial state, the two sets of folding ear plates are located on both sides of the bag body. When the two folding ear plates drive the pressure plate to approach each other, the folding ear plates drive the bag ears to fold. At this time, the packaged bag is between the pressure plate and the folding ear plates. The driving component drives the support plate to retract through the telescopic plate, causing the pressing component to move towards the pressure plate to fold the bag body and bag ears of the packaged bag. The lifting support platform drives the support plate to move down, and the working pressure plate and folding ear plates of the translation worktable drive the packaged bag to the upper end of the positioning block. At this time, the packaged bag is folded once. The second moving component drives the fixed plate to press the packaged bag. At this time, the bag ear folding mechanism is reset, and the side of the bag body away from the positioning block is above the push plate. At this time, the third moving component drives the push plate to move up through the folding plate and move towards the upper part of the fixed plate, thereby driving the bag body to fold a second time. The second moving part drives the fixed plate to avoid the pressure plate. At this time, the second moving part drives the bag body to move down again through the folding plate, so that the bag body is folded three times along the side of the positioning block. Then, the folded bag body is pushed out from the discharge port by the pushing plate, thus completing the folding of the packaging bag. When folding packaging bags of different specifications, the distance between the two support plates is adjusted, and the length of the support plates is adjusted by the telescopic plate, so that the support plates can be adapted to packaging bags of different widths and lengths, thus facilitating the folding of packaging bags of different sizes.

[0009] Optionally, the frame is also equipped with a feeding mechanical claw, which is used to grab the bag and place the bag on the support plate along the frame.

[0010] By adopting the above technical solution, the feeding mechanical claw can improve the convenience of conveying packaging bags to the support plate.

[0011] Optionally, the frame is provided with a fastening plate located directly above the lifting support platform. The frame is fixedly connected to a crossbeam for supporting the fastening plate, and the crossbeam is provided with a clamping cylinder for driving the fastening plate to move vertically.

[0012] By adopting the above technical solution, under the support of the crossbeam, the clamping cylinder drives the fastening plate to move down, so that the fastening plate lifting support platform can clamp the packaging bag, which helps to improve the stability of the packaging bag when folding the bag ears.

[0013] Optionally, the fastening plate has an extension plate on the side away from the support plate, and a positioning plate is provided at the end of the extension plate away from the fastening plate. The positioning plate moves along the length of the extension plate, and a connector is provided at the end of the positioning plate near the support plate. A pressure roller is rotatably connected to the connector in a transverse direction. A horizontal plate is fixedly connected to the upper end of the extension plate, and a rotating rod is rotatably connected to both ends of the horizontal plate. A push block is fixedly connected to the lower end of the rotating rod, and a rotary motor is provided on the pressure plate for driving the rotating rod to rotate.

[0014] By adopting the above technical solution, when the width of the packaging bag is too wide, the packaging bag is moved below the extension plate, causing the positioning plate to drive the pressure roller to move along the length of the packaging bag via the connecting piece. The pressure roller and the positioning plate cooperate to limit the middle position of the packaging bag. At this time, there is a certain gap between the fastening plate and the lifting support platform, and the two sides of the packaging bag hang down. In the initial state, the push block is set parallel to the extension plate. At this time, under the support of the horizontal plate, the rotating rod is driven by the rotary motor to rotate, causing the push block to fold the hanging part of the packaging bag inward. The lifting support platform moves up and cooperates with the pressure plate to clamp and position the packaging bag. At this time, the folded packaging bag is supported by two support plates, and the bag ear folding mechanism folds the bag ears of the packaging bag. Before folding the bag ears, the sides of the packaging bag are initially folded, which makes it easier to fold packaging bags whose width is greater than the maximum moving distance between the two support plates, thus improving the applicability of the packaging bag.

[0015] Optionally, the connecting member includes a connecting rod, an elastic element, and a support column. The connecting rod is hinged to the end of the positioning plate away from the extension plate. The elastic element is located between the positioning plate and the connecting rod and is used to drive the connecting rod to move closer to the extension plate. The support column is vertically fixed to the end of the connecting rod away from the positioning plate. The pressure roller is sleeved on the outside of the support column and is rotatably connected to the support column.

[0016] By adopting the above technical solution, the positioning plate supports the support column through the connecting rod, so that the support column supports the rotation of the pressure roller. Under the action of the elastic element, the pressure roller pushes the packaging bag to fit with the extension plate and the fastening plate, which helps to improve the positioning effect of the packaging bag.

[0017] Optionally, the extension plate has two movable blocks at the end away from the pressure plate. The movable blocks are rotatably connected to a take-up reel. A positioning line is wound around the outside of the take-up reel. A reset spring is provided between the take-up reel and the movable blocks. The reset spring is used to drive the take-up reel to take up the positioning line. The end of the pressure roller away from the connecting rod is rotatably connected to a movable column. The end of the positioning line away from the take-up reel is fixedly connected to the movable column.

[0018] By adopting the above technical solution, the moving block supports the take-up reel. When the pressure roller moves, the moving column drives the positioning line to unwind. When the pressure roller resets, the reset spring drives the take-up reel to wind up the positioning line. The positioning line limits the packaging bag, so that the packaging bag is folded along the positioning line in the width direction, which helps to improve the folding accuracy of the packaging bag.

[0019] Optionally, the movable block is slidably connected to the extension plate along the width direction of the extension plate, the extension plate is rotatably connected to a threaded rod, the threaded rod passes through the movable block and is threadedly connected to the movable block, a threaded column is fixedly connected to one end of the support column near the connecting rod, and a connecting ring adapted to the threaded column is rotatably connected to the pressure roller, the connecting ring is threadedly connected to the threaded column.

[0020] By adopting the above technical solution, when the threaded rod rotates, it drives the moving block to move, and then the position of one end of the positioning line is adjusted by the moving block. Under the support of the threaded column, when the connecting ring is rotated, the connecting ring drives the pressing roller to move along the axial direction, thereby adjusting the distance between the pressing roller and the connecting rod, so that the pressing roller and the positioning line are suitable for packaging bags of different widths.

[0021] Optionally, the positioning block has several slots along its length that communicate with the discharge port, and the positioning block has a vertical plate that matches the slots. The vertical plate is located in any slot and engages with the positioning block.

[0022] By adopting the above technical solution, the positioning block fixes the vertical plate through the slot, so that the vertical plate separates the discharge port, thereby making the discharge port suitable for packaging bags of different specifications.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. In the initial state, the telescopic plate extends the support plate, placing the packaged bag on top of the support plate. The two support plates support the packaged bag through baffles, and the two bag ears of the packaged bag are located on the outside of the support plates. The translation worktable is located on the side of the lifting support platform with the support plate. In the initial state, two sets of folding ear plates are located on both sides of the bag body. When the two folding ear plates drive the pressure plate to approach each other, the folding ear plates drive the bag ears to fold. At this time, the packaged bag is between the pressure plate and the folding ear plates. The driving component drives the support plate to retract through the telescopic plate, causing the pressing component to move towards the pressure plate to fold the bag body and bag ears of the packaged bag. The lifting support platform drives the support plate to move down, and the working pressure plate and folding ear plates of the translation worktable move the packaged bag to the upper end of the positioning block. At this time, the packaged bag is folded once. The second moving component drives the fixed plate to press the packaged bag. At this time, the bag ear folding mechanism resets, and the side of the bag body away from the positioning block is above the push plate. At this time, the third moving component drives the push plate to move up through the folding plate and move towards the upper part of the fixed plate, thereby driving the bag body to fold a second time. The second moving part drives the fixed plate to avoid the pressure plate. At this time, the second moving part drives the bag body to move down again through the folding plate, so that the bag body is folded three times along the side of the positioning block. Then, the folded bag body is pushed out from the discharge port by the pushing plate, thus completing the folding of the packaging bag. When folding packaging bags of different specifications, the distance between the two support plates is adjusted, and the length of the support plates is adjusted by the telescopic plate, so that the support plates can be adapted to packaging bags of different widths and lengths, thus facilitating the folding of packaging bags of different sizes.

[0025] 2. When the width of the packaging bag is too wide, move the packaging bag below the extension plate. This allows the positioning plate to drive the pressure roller along the length of the packaging bag via the connector. The pressure roller and positioning plate work together to limit the middle position of the packaging bag. At this time, there is a certain gap between the fastening plate and the lifting support platform, and the two sides of the packaging bag hang down. Initially, the push block is parallel to the extension plate. Supported by the horizontal plate, the rotating motor drives the rotating rod to rotate, causing the push block to fold the hanging portion of the packaging bag inward. The lifting support platform moves up and works with the pressure plate to clamp and position the packaging bag. Two support plates support the folded packaging bag, and the bag ear folding mechanism folds the bag ears. Before folding the bag ears, the sides of the packaging bag are initially folded, making it easier to fold packaging bags wider than the maximum moving distance between the two support plates, thus improving the applicability of the packaging bag. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the embodiment.

[0027] Figure 2 This is a schematic diagram designed to highlight the structure of the lifting support platform.

[0028] Figure 3This is a schematic diagram designed to highlight the support plate structure.

[0029] Figure 4 This is a schematic diagram designed to highlight the extension plate structure.

[0030] Figure 5 This is a schematic diagram designed to highlight the bag loop folding mechanism.

[0031] Figure 6 This is a schematic diagram designed to highlight the bag's folding mechanism.

[0032] Figure 7 This is a schematic diagram designed to highlight the connection between the positioning plate and the pressure roller.

[0033] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Feeding mechanical claw; 2. Support mechanism; 21. Lifting support platform; 22. Telescopic plate; 23. Support plate; 231. Baffle; 24. Drive component; 25. Moving component one; 3. Bag ear folding mechanism; 31. Translation worktable; 32. Ear folding plate; 33. Pressure plate; 34. Pressing component; 4. Bag body folding mechanism; 41. Positioning block; 411. Discharge port; 412. Slot; 413. Vertical plate; 42. Bag stacking plate; 421. Pushing plate; 43. Fixing plate; 44. Moving... Moving part 2; 45. Moving part 3; 5. Fastening plate; 51. Extension plate; 511. Threaded rod; 52. Positioning plate; 53. Connecting part; 531. Connecting rod; 532. Elastic part; 533. Support column; 534. Threaded column; 54. Pressure roller; 541. Moving column; 542. Connecting ring; 6. Crossbeam; 61. Pressure cylinder; 62. Rotating rod; 621. Push block; 63. Cross plate; 64. Moving block; 641. Rewinding reel; 641. Positioning line; 643. Reset spring; 65. Rotary motor. Detailed Implementation

[0034] The present application will be further described in detail below with reference to all the accompanying drawings.

[0035] This application discloses a packaging bag folding mechanism.

[0036] Example:

[0037] Reference Figure 1 and Figure 2 A packaging bag folding mechanism includes a frame 1, with a feeding mechanical claw 11, a support mechanism 2 and a bag folding mechanism 4 arranged sequentially along the extension direction of the frame 1, and the frame 1 is provided with a bag ear folding mechanism 3 that moves along its own length direction.

[0038] Reference Figure 1 and Figure 2The support mechanism 2 includes a lifting support platform 21, a telescopic plate 22 and two sets of support plates 23. The lifting support platform 21 is slidably connected to the frame 1 in a vertical direction. The frame 1 is equipped with a driving component 24 for driving the lifting support platform 21 to move. The driving component 24 is a cylinder, a hydraulic cylinder or a commonly used mechanism in this technical field. In this embodiment, the frame 1 drives the lifting support platform 21 to move through a cylinder.

[0039] Reference Figure 2 and Figure 3 The telescopic plate 22 is located at the upper end of the support platform and along the frame 1 (reference). Figure 1 The support plate 23 is slidably connected to the lifting support platform 21 along its length. When the lifting support platform 21 moves, it drives the telescopic plate 22 to move. The lifting platform is equipped with a guide rail cylinder for driving the telescopic plate 22 to extend and retract. Both sets of support plates 23 are located at the upper end of the telescopic plate 22 and are symmetrically arranged with the telescopic plate 22 as the center. The two sets of support plates 23 are slidably connected to the telescopic plate 22 along the width direction of the frame 1. When the telescopic plate 22 moves, it drives the support plates 23 to move.

[0040] Reference Figure 2 and Figure 3 The telescopic plate 22 is equipped with a moving component 25, which includes a motor and a double-acting lead screw. The motor is fixedly connected to the telescopic plate 22, and the double-acting lead screw is fixedly connected to the motor output shaft. Both ends of the double-acting lead screw are threaded with sliders, and each support plate 23 corresponds to a slider, with the support plate 23 fixedly connected to its corresponding slider. Under the support of the telescopic plate 22, when the double-acting lead screw is rotated by the motor, the double-acting lead screw, through the two sliders, causes the two support plates 23 to move closer or further apart.

[0041] Reference Figure 2 and Figure 3 Each of the two support plates 23 has a baffle 231 fixed on one side that is close to each other. The baffles 231 are evenly arranged along the length of the support plate 23. The baffles 231 of the two support plates 23 are staggered and located in the same plane. When the support plate 23 moves, it drives the baffles 231 to move. The feeding mechanical claw 11 grabs the packaging bag and moves the packaging bag along the frame 1 to above the lifting support platform 21. The lifting support platform 21 cooperates with the two support plates 23 to support the packaging bag.

[0042] Reference Figure 2 and Figure 4 Rack 1 (Reference) Figure 1 A crossbeam 6 is fixed at the upper end along the width direction (reference). Figure 1 The lower end of the crossbeam 6 is vertically slidably connected to a fastening plate 5. (Reference) Figure 1The upper end is equipped with a pressing cylinder 61. When the packaging bag moves above the support plate 23, the pressing cylinder 61 drives the fastening plate 5 to press down, so that the fastening plate 5 cooperates with the lifting support platform 21 to press and position the packaging bag.

[0043] Reference Figure 2 and Figure 4 The support plate 23 has a beveled edge on the side away from the lifting support platform 21. Before folding, the distance between the two support plates 23 is adjusted by the moving part 25 so that the distance between the farthest edges of the two support plates 23 is greater than the width of the packaging bag. The support plate 23 cooperates with the baffle 231 to support the end of the packaging bag with the bag ears. When it is necessary to process packaging bags of different widths, the position of the support plate 23 can be adjusted by the moving part, which helps to improve the applicability of the support plate 23.

[0044] Reference Figure 1 and Figure 5 The bag folding mechanism 3 includes a translation worktable 31, a folding plate 32, and a pressure plate 33. The translation worktable 31 is slidably connected to the frame 1 along the length direction. The frame 1 is rotatably connected to a lead screw arranged along the length direction. The lead screw passes through one end of the translation worktable 31 and is threadedly connected to the translation worktable 31. The frame 1 is equipped with a motor for driving the lead screw to rotate. When the lead screw rotates, it drives the translation worktable 31 to move along the length direction of the frame 1.

[0045] Reference Figure 1 and Figure 5 Two sets of folding lugs 32 are provided, and both sets of folding lugs 32 are located on the same side of the translation worktable 31. When the translation worktable 31 is located on the side of the lifting support platform 21 where the support plate 23 is located, the folding lugs 32 and the support plate 23 are directly opposite each other. The folding lugs 32 are slidably connected to the translation worktable 31 along its length. When the translation worktable 31 moves, it drives the folding lugs 32 to move. Two sets of support wheels are rotatably connected to the translation worktable 31 along its length. A belt is rotatably connected between the two sets of support wheels. The translation worktable 31 is equipped with a motor for driving the rotation of any support wheel. When the support wheel rotates, it drives the belt to move.

[0046] Reference Figure 1 and Figure 5Connecting blocks are fixedly connected to both the upper and lower ends of the belt. Each connecting block corresponds to a folding plate 32, and the folding plate 32 is connected to the corresponding connecting block. When the belt rotates, the corresponding folding plate 32 moves through the connecting block. The pressure plate 33 is located at the upper end of the folding plate 32, and the end of the pressure plate 33 near the translation worktable 31 is hinged to the folding plate 32. When the folding plate 32 moves, it drives the pressure plate 33 to move. The folding plate 32 is provided with a clamping member 34 for moving the pressure plate 33 closer to or away from the folding plate 32. In this embodiment, the clamping member 34 is selected as a miniature cylinder. The miniature cylinder is hinged to the folding plate 32, and the output end of the miniature cylinder is hinged to the pressure plate 33. When the miniature cylinder works, it drives the pressure plate 33 closer to or away from the folding plate 32.

[0047] Reference Figure 2 and Figure 3 When the packaging bag is above the support plate 23, the bag ears fall down along the inclined side of the support plate 23 under the action of gravity. At this time, the translation worktable 31 moves the folding ear plate 32 closer to the support plate 23. The two folding ear plates 32 are located on both sides of the two support plates 23, and the pressure plate 33 is located away from the folding ear plates 32. There is a certain gap between the upper end face of the folding ear plate 32 and the lower end face of the support plate 23. At this time, the two folding ear plates 32 are controlled to move closer to each other. When the folding ear plates 32 move, they cause the two bag ears of the packaging bag to fold towards the bag body. At this time, the pressure plate 33 presses down, cooperating with the folding ear plates 32 to clamp and position the packaging bag. When the pressure plate 33 presses down, the drive component 24 drives the telescopic plate 22 to retract, so that the telescopic plate 22 drives the support plate 23 to avoid the pressure plate 33.

[0048] Reference Figure 1 and Figure 6 The bag folding mechanism 4 includes a positioning block 41, a folding plate 42, and a fixing plate 43. The positioning block 41 is horizontally fixed to the end of the frame 1 away from the feeding machine claw 11, and the positioning block 41 has a discharge port 411 opened laterally. The fixing plate 43 is located above the positioning block 41. The frame 1 is provided with a second moving part 44, which includes a lifting plate, a cylinder 1, and a cylinder 2. The cylinder 1 is installed at the upper end of the frame 1, and the lifting plate is located above the positioning block 41. The output end of the cylinder 1 is fixedly connected to the lifting plate and is used to drive the lifting plate to move up and down. The fixing plate 43 is located at the lower end of the lifting plate and is slidably connected to the lifting plate along the length of the frame 1. When the lifting plate moves, it drives the fixing plate 43 to move. The cylinder 2 is fixedly connected to the lifting plate, and the output end of the cylinder 2 is fixedly connected to the fixing plate 43. The cylinder 2 drives the fixing plate 43 to move along the length of the frame 1.

[0049] Reference Figure 1 and Figure 6The stacking plate 42 is located at one end of the positioning block 41 near the lifting support platform 2451. The frame 1 is provided with a moving part 3 45, which includes a support block, a cylinder 3, and a cylinder 4. The support block is slidably connected to the support block along the length of the frame 1. The cylinder 3 is fixedly connected to the frame 1 and is used to drive the support block to move. The stacking plate 42 is located directly above the support block and is slidably connected to the support block vertically. When the support block moves, it drives the stacking plate 42 to move. The cylinder 4 is fixedly connected to the support block and is used to drive the stacking plate 42 to move vertically. A push plate 421 is fixed on the side of the stacking plate 42 near the positioning block 41. When the stacking plate 42 moves, it drives the push plate 421 to move.

[0050] Reference Figure 5 and Figure 6 After the pressure plate 33 and the folding ear plate 32 clamp the packaging bag, the lifting support platform 21 moves down and the fastening plate 5 moves up. The translation worktable 31 then moves the packaging bag towards the positioning block 41. The upper surface of the positioning block 41 is lower than the lower surface of the folding ear plate 32. The folding ear plate 32 pushes the packaging bag above the positioning block 41, at which point the packaging strap folds once along the side edge of the positioning block 41. Then, the cylinder 2 moves the fixing plate 43 down, causing the fixing plate 43 to clamp the packaging bag in conjunction with the positioning block 41. At this point, the clamping member 34 releases its grip on the packaging bag, and the translation worktable 31 returns to its original position.

[0051] Reference Figure 5 and Figure 6 One end of the packaging bag with the bag handle is located between the fixed plate 43 and the positioning block 41, and the other end is located above the push plate 421. At this time, the isomorphic cylinder four drives the push plate 421 to move upward, causing the push plate 421 to cause the packaging bag to flip. When the push plate moves to a position higher than the fixed plate 43, the cylinder three drives the push plate to move upward above the positioning block 41. At this time, the packaging bag is folded a second time under the support of the fixed plate 43. In the initial state, the side of the fixed plate 43 near the lifting support platform 21 extends to the outside of the positioning block 41. After the packaging bag completes the second fold, the cylinder two drives the fixed plate 43 to avoid the push plate 421.

[0052] Reference Figure 5 and Figure 6The cylinder 4 drives the push plate 421 downward, causing the push plate 421 to move the packaging bag. At this time, one side of the packaging bag is above the positioning block 41, and the other end is below the push plate 421. The distance between the push plate 421 and the positioning block 41 is adapted to the thickness of the packaging bag after the second fold. When the push plate 421 moves, it causes the packaging bag to be folded three times along the positioning block 41 and moves the packaging bag towards the discharge port 411. When the packaging bag is directly opposite the discharge port 411, the cylinder 3 drives the feeding plate to push the packaging bag out of the discharge port 411, thus completing the folding of the packaging bag. The distance between the two support plates 23 is adjusted according to the width of the packaging bag, so that the support plates 23 are suitable for packaging bags of different widths, thus facilitating the folding of packaging bags of different sizes.

[0053] Reference Figure 5 and Figure 6 The positioning block 41 has multiple slots 412 along the width of the frame 1, all of which are connected to the discharge port 411. The positioning block 41 has a vertical plate 413 adapted to the discharge port 411. The vertical plate 413 is located within any slot 412 and abuts against the positioning block 41. The positioning block 41 limits the vertical plate 413 through the slots 412, thus separating the discharge port 411. The vertical plate 413 limits the packaging bag, making the discharge port 411 suitable for packaging bags of different sizes.

[0054] Reference Figure 4 and Figure 7 Furthermore, an extension plate 51 is fixedly mounted on the side of the fastening plate 5 near the positioning block 41. When the fastening plate 5 moves, it drives the extension plate 51 to move. A positioning plate 52 is provided at the lower end of the extension plate 51, and the positioning plate 52 is slidably connected to the extension plate 51 along its length. The extension plate 51 has a through groove adapted to the positioning plate 52, and a drive motor for moving the positioning plate 52 is installed inside the extension plate 51. A straight plate is vertically fixed at the lower end of the positioning plate 52, and the straight plate extends along the extension plate 51 toward the fastening plate 5, with a certain gap between the straight plate and the extension plate 51.

[0055] Reference Figure 4 and Figure 7 A connector 53 is provided at the end of the straight plate away from the positioning plate 52. The connector 53 includes a connecting rod 531, an elastic element 532, and a support column 533. The connecting rod 531 is hinged to the straight plate. The elastic element 532 is a torsion spring located between the connecting rod 531 and the straight plate, used to drive the connecting rod 531 closer to the extension plate 51. The support column 533 is vertically fixed to the end of the connecting rod 531 away from the straight plate. When the connecting rod 531 moves, it drives the support column 533 to move.

[0056] Reference Figure 4 and Figure 7Both ends of the support column 533 are equipped with pressure rollers 54. The pressure rollers 54 are sleeved on the outside of the support column 533 and rotatably connected to the support column 533. When the support column 533 moves, it drives the pressure rollers 54 to move. A threaded column 534 is coaxially fixed at one end of the support column 533 near the connecting rod 531. A connecting ring 542 adapted to the thread is coaxially rotatable on the pressure roller 54. The connecting ring 542 is threadedly engaged with the threaded column 534, thereby limiting the axial movement of the pressure roller 54.

[0057] Reference Figure 4 and Figure 7 Two movable blocks 64 are provided at the end of the extension plate 51 away from the fastening plate 5. The movable blocks 64 are slidably connected to the extension plate 51 along its length. The extension plate 51 is rotatably connected to two threaded rods 511 that are adapted to the movable blocks 64. The threaded rods 511 pass through the movable blocks 64 and are threadedly connected to them. The threaded rods 511 limit the movement of the movable blocks 64, so that when the threaded rods 511 rotate, they drive the movable blocks 64 to move, thereby adjusting the position of the movable blocks 64.

[0058] Reference Figure 4 and Figure 7 The movable block 64 is rotatably connected to a take-up reel 641. A positioning line 642 is wound around the outer side of the take-up reel 641. A reset spring 643 is provided between the take-up reel 641 and the movable block 64. The reset spring 643 has the tendency to drive the take-up reel 641 to wind up the positioning line 642. The end of the pressure roller 54 away from the connecting rod 531 is rotatably connected to a movable column 541. The end of the positioning line 642 away from the take-up reel 641 is fixedly connected to the movable column 541. When the pressure roller 54 moves, it drives the positioning line 642 to unwind through the movable column 541.

[0059] Reference Figure 4 and Figure 7 By using the loading robotic claw 11 (reference) Figure 1 The packaging bag is moved to a position below the fastening plate 5, with the end of the bag away from the bag ear positioned between the straight plate and the extension plate 51. The positioning plate 52 is moved along the extension plate 51, and under the action of the elastic element 532, the pressure roller 54 abuts against the lower end face of the packaging bag. At this time, the pressure roller 54 and the extension plate 51 cooperate to clamp and position the packaging bag. As the pressure roller 54 moves, it drives the positioning line 642 to move along the packaging bag. At this time, the two sets of positioning lines 642 cooperate to support the packaging strap. When the loading machine claw 11 (refer to...) Figure 1 After the clamping of the packaging bag is released, the middle position of the packaging bag is supported by the pressure roller 54 and the positioning line 642. At this time, the two sides of the packaging bag bend downward under the action of gravity.

[0060] Reference Figure 4 and Figure 7A horizontal plate 63 is fixed to the upper end of the extension plate 51. When the pressure plate 33 moves, it drives the horizontal plate 63 to move. Both ends of the horizontal plate 63 are rotatably connected to rotating rods. The two rotating rods are parallel to each other, and the packaging bag is located between the two rotating rods. The pressure plate 33 is equipped with a rotary motor 65 for driving the rotating rods to rotate. The rotary motor 65 drives the two rotating rods to rotate synchronously through a gear linkage mechanism. A push block 621 is fixedly connected to the lower end of the rotating rod. When the rotating rod moves, it drives the push block 621 to move.

[0061] Reference Figure 4 and Figure 7 In the initial state, the two push blocks 621 are located on both sides of the packaging bag. When the feeding mechanical claw 11 releases its grip on the packaging bag, the two rotating rods are driven to rotate by the rotary motor 65, so that the rotating rods drive the two sides of the packaging bag to bend inward through the push blocks 621, thereby folding the packaging bag along the width direction.

[0062] Reference Figure 4 and Figure 7 After the width folding is completed, the lifting support platform 21 is moved upward. At this time, the positioning plate 52 drives the pressing roller 54 to separate from the packaging bag, so that the lifting support platform 21 and the fastening plate 5 cooperate to clamp the packaging bag. Then, the packaging bag is folded along the length direction of the packaging bag by the bag ear folding mechanism 3 and the bag body folding mechanism 4, which makes it easier to fold the packaging bag with a wider width.

[0063] The working principle of the packaging bag folding mechanism of this application is as follows: The feeding mechanical claw 11 places the packaging bag above the lifting support platform 21, and the fastening plate 5 cooperates with the lifting support platform 21 to clamp the packaging bag. The distance between the two support plates 23 is adjusted by the moving part 25, so that the distance between the two support plates 23 on the side that is far away from each other is greater than the width of the packaging bag, so as to be suitable for packaging bags of different specifications. Under the support of the horizontal worktable, the two folding ears 32 move closer to each other, so that the folding ears 32 drive the bag ears to bend. The clamping part 34 clamps the packaging bag through the pressure plate 33. The horizontal worktable drives the packaging bag to move towards the bag body folding assembly, and the bag body folding assembly folds it along the length of the packaging bag. The support plate 23 is suitable for supporting packaging straps of different specifications, which helps to improve the convenience of folding packaging bags of different specifications.

[0064] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A packaging bag folding mechanism, comprising a frame (1), characterized in that: The frame (1) is also provided with: Support mechanism (2), the support mechanism (2) includes lifting support platform (21), telescopic plate (22) and two sets of support plates (23). The lifting support platform (21) moves up and down along the height direction of the frame (1). The telescopic plate (22) is horizontally set in front of the lifting support platform (21). The lifting support platform (21) is provided with a drive component (24) to drive the telescopic plate (22) to extend and retract. The two support plates (23) are both located at the upper end of the telescopic plate (22) and both move and retract with the telescopic plate (22). The two support plates (23) are symmetrically arranged. The telescopic plate (22) is provided with a moving component (25) to drive the two support plates (23) to move closer or further away. The side of the two support plates (23) that is close to each other is provided with a baffle (231). The baffles (231) of the two support plates (23) are staggered. The bag ear folding mechanism (3) includes a translation worktable (31), ear plates (32) and pressure plates (33). The translation worktable (31) moves along the length of the frame (1). The ear plates (32) are located on the side of the translation worktable (31) close to the lifting support platform (21) and there are two sets. Both sets of ear plates (32) move along the length of the translation worktable (31). The pressure plates (33) correspond one-to-one with the ear plates (32) and the pressure plates (33) move along the translation worktable (31) with the ear plates (32). The translation worktable (31) is provided with a clamping member (34) that drives the pressure plates (33) to approach or move away from the ear plates (32). The bag folding mechanism (4) includes a positioning block (41), a stacking plate (42), and a fixing plate (43). The positioning block (41) is fixedly connected to one end of the frame (1) away from the lifting support platform (21), and the positioning block (41) has a discharge port (411) adapted to the packaging bag in the transverse direction. The fixing plate (43) is located directly above the positioning block (41). The frame (1) is provided with a second moving part (44) that drives the fixing plate (43) to move up and down and back and forth. The stacking plate (42) is located on the side of the positioning block (41) close to the lifting support platform (21). The frame (1) is provided with a third moving part (45) that drives the stacking plate (42) to move up and down and back and forth. The side of the stacking plate (42) close to the positioning block (41) is provided with a push plate (421) adapted to the discharge port (411). The frame (1) is provided with a fastening plate (5), which is located on the side of the lifting support platform (21). Above, a crossbeam (6) for supporting the fastening plate (5) is fixedly connected to the frame (1). The crossbeam (6) is equipped with a pressing cylinder (61) for driving the fastening plate (5) to move vertically. An extension plate (51) is provided on the side of the fastening plate (5) away from the support plate (23). A positioning plate (52) is provided at the end of the extension plate (51) away from the fastening plate (5). The positioning plate (52) moves along the length of the extension plate (51). A connector (53) is provided at the end of the positioning plate (52) close to the support plate (23). A pressing roller (54) is rotatably connected to the connector (53) in the transverse direction. A horizontal plate (63) is fixedly connected to the upper end of the extension plate (51). A rotating rod (62) is rotatably connected to both ends of the horizontal plate (63). A push block (621) is fixedly connected to the lower end of the rotating rod (62). A rotary motor (65) for driving the rotating rod (62) to rotate is provided on the pressure plate (33).

2. The packaging bag folding mechanism according to claim 1, characterized in that: The frame (1) is also equipped with a feeding mechanical claw (11), which is used to grab the bag and place the bag on the support plate (23) along the frame (1).

3. The packaging bag folding mechanism according to claim 1, characterized in that: The connector (53) includes a connecting rod (531), an elastic element (532), and a support column (533). The connecting rod (531) is hinged to the end of the positioning plate (52) away from the extension plate (51). The elastic element (532) is located between the positioning plate (52) and the connecting rod (531) and is used to drive the connecting rod (531) to move closer to the extension plate (51). The support column (533) is vertically fixed to the end of the connecting rod (531) away from the positioning plate (52). The pressure roller (54) is sleeved on the outside of the support column (533) and rotatably connected to the support column (533).

4. The packaging bag folding mechanism according to claim 3, characterized in that: Two movable blocks (64) are provided at the end of the extension plate (51) away from the pressure plate (33). The movable blocks (64) are rotatably connected to a take-up reel (641). A positioning line (642) is wrapped around the outside of the take-up reel (641). A reset spring (643) is provided between the take-up reel (641) and the movable blocks (64). The reset spring (643) is used to drive the take-up reel (641) to take up the positioning line (642). A movable column (541) is rotatably connected at the end of the pressure roller (54) away from the connecting rod (531). The end of the positioning line (642) away from the take-up reel (641) is fixedly connected to the movable column (541).

5. A packaging bag folding mechanism according to claim 4, characterized in that: The movable block (64) is slidably connected to the extension plate (51) along the width direction of the extension plate (51). The extension plate (51) is rotatably connected to a threaded rod (511). The threaded rod (511) passes through the movable block (64) and is threadedly connected to the movable block (64). The end of the support column (533) near the connecting rod (531) is fixedly connected to a threaded column (534). The pressure roller (54) is rotatably connected to a connecting ring (542) that is adapted to the threaded column (534). The connecting ring (542) is threadedly connected to the threaded column (534).

6. The packaging bag folding mechanism according to claim 1, characterized in that: The positioning block (41) has several slots (412) along its length that communicate with the discharge port (411). The positioning block (41) has a vertical plate (413) that is adapted to the slot (412). The vertical plate (413) is located in any slot (412) and is engaged with the positioning block (41).

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