Paper bag mouth folding device and full-automatic paper bag threading machine

Abstract

The utility model discloses paper bag mouth folding device and full -automatic paper bag wear belt machine, this paper bag mouth folding device includes frame, be equipped with paperboard line pressing mechanism and paperboard folding and pressing mechanism on the frame, the paperboard line pressing mechanism below is equipped with surface paperboard on the frame, the paperboard line pressing mechanism is set up above parallel to the conveying direction, and the folding line of surface paperboard is pressed down to the action, the paperboard folding and pressing mechanism is set up above the side portion parallel to the conveying direction, and the edge of surface paperboard is folded and is pressed into an organic whole along the folding line to the action perpendicular to the conveying direction simultaneously with the cooperation of up and down action, this paper bag mouth folding device and full -automatic paper bag wear belt machine, adopt automatic equipment to replace manual operation, and production efficiency is high, and large -scale production reduces product cost, and improves product quality.

Description

Technical Field

[0001] This utility model relates to the field of paper packaging bag processing technology, specifically a paper bag opening folding device and a fully automatic paper bag threading machine. Background Technology

[0002] Paper bags or paper boxes are common household and commercial items, widely used in the customized packaging of holiday gift boxes, high-end goods or clothing; they can also be used for exhibition information bags and derivative packaging of cultural and creative products.

[0003] During the processing of paper bags or boxes, U-shaped straps need to be threaded onto the flat bag or box body. Some paper bags also need to have a straight strap added on each side in the middle. The two straight straps can be tied together to prevent the items inside the bag from jumping out and falling.

[0004] The U-shaped rope and straight straps are glued to the bag or box body using spray adhesive. Then, they are folded in half and glued again to form a tote bag or tote box.

[0005] The opening of a paper bag needs to be folded in half to strengthen it, enabling the bag to bear weight and preventing the drawstring from coming undone during use. This folding process involves many manual steps, requires numerous tools, is slow, and results in inconsistent product quality after folding.

[0006] The processing of paper bags or paper boxes is done manually, which is inefficient, monotonous, results in low daily output per person, and leads to unstable product quality and poor consistency.

[0007] Therefore, the aforementioned technical problems need to be solved. Summary of the Invention

[0008] This utility model addresses the above-mentioned technical problems by providing a paper bag opening folding device. It uses automated equipment to replace manual labor, resulting in high production efficiency, reduced product costs for mass production, and significantly improved product quality.

[0009] To achieve the above objectives, the technical solution of this utility model is as follows:

[0010] A paper bag opening folding device includes a frame, on which a cardboard creasing mechanism and a cardboard folding and pressing mechanism are provided;

[0011] The cardboard creasing mechanism is positioned above the conveying direction and moves downwards to press down on the fold lines of the cardboard.

[0012] The cardboard folding and pressing mechanism is positioned parallel to the conveying direction on the upper side. Its operation perpendicular to the conveying direction, combined with its up-and-down movement, folds and presses the edge of the cardboard along the folding line into a single unit.

[0013] This paper bag opening folding device automates manual operations through the paperboard creasing mechanism and the paperboard folding and pressing mechanism, resulting in high production efficiency, reduced product costs for mass production, and significantly improved product quality.

[0014] In a further optimized design, the cardboard creasing mechanism is inclined upwards and includes a creasing plate and a creasing servo rack and pinion transmission mechanism.

[0015] The pressure servo rack and pinion transmission mechanism has a first rack that moves back and forth. The pressure plate is connected to the first rack. The back and forth movement of the first rack drives the pressure plate to move obliquely up and down. The pressure plate moves obliquely down to press the fold line of the face paper.

[0016] In a further optimized design, the cardboard folding and pressing mechanism includes a folding plate, a forward and backward folding mechanism, and a vertical folding mechanism; the folding plate is horizontally positioned and connected to the forward and backward folding mechanism, and the forward and backward folding mechanism is connected to the vertical folding mechanism.

[0017] The forward and backward folding mechanism drives the folding plate to move back and forth perpendicular to the conveying direction, and the up and down folding mechanism drives the folding plate and the forward and backward folding mechanism to move up and down together.

[0018] In a further optimized solution, the folding forward and backward movement mechanism includes a folding servo rack and pinion transmission mechanism, which has a second rack that moves back and forth. The second rack moves back and forth, driving the folding plate to move back and forth perpendicular to the conveying direction.

[0019] The folding up and down moving mechanism includes folding up and down cylinders arranged in parallel at both ends, with their piston rod ends connected to the folding front and back moving mechanism. The folding up and down cylinders drive the folding plate and the folding front and back moving mechanism to move up and down together.

[0020] The fully automatic paper bag threading machine includes any of the paper bag opening folding devices described above.

[0021] In a further optimized design, the paper bag opening folding device is equipped with a paper material storage module, a feeding guide module, a U-belt threading module 1, and a U-belt threading module 2 connected in sequence.

[0022] A straight guiding plane, a ring conveyor chain, and several clamps are horizontally arranged between the outlet of the feeding guide module and the end of the paper bag opening folding device. The clamps are arranged on the ring conveyor chain and the spacing between them is adapted to the process module.

[0023] The paperboard material storage module sequentially conveys single sheets of paperboard to the feeding guide module. The feeding guide module guides the paperboard at a position perpendicular to the conveying direction and moves it to its outlet position. The clamp clamps the paperboard. The annular conveyor chain rotates, driving the clamp to move. The paperboard clamped by the clamp moves to the subsequent process module on the linear guide plane. The paper bag opening folding device folds the edges of the paperboard and presses them together.

[0024] This fully automatic paper bag threading machine combines various process modules, each performing a different function. The face paper storage module stacks face paper sheets and continuously conveys them to the feeding and guiding module for alignment. After alignment, the face paper sheets are clamped by the clamps and transmitted to the subsequent modules via a circular conveyor chain to complete the corresponding actions. The circular conveyor chain drives the clamps to rotate continuously, continuously conveying face paper sheets and connecting the various process modules together. The connection between them does not require manual operation, greatly improving production efficiency.

[0025] The further optimized solution also includes at least one cardboard pasting module, which is located between the feed guide module and the U-belt pasting module. The cardboard pasting module attaches the inner lining paper block to the edge of the faceboard.

[0026] The cardboard attaching module attaches the inner lining paper to the corresponding position on the edge of the cardboard to enhance the edge strength, so that the formed paper bag can lift heavier items and the carrying straps are less likely to be damaged or fall off.

[0027] In a further optimized design, the annular conveyor chain consists of two parallel chains, each connected to a support clamp; the chains are driven to rotate via a sprocket transmission mechanism.

[0028] Further optimization of the scheme also includes a straightening tape module connected in sequence therein, the straightening tape module being located after the feeding guide module and before the paper bag opening folding device;

[0029] The faceboard is provided with two first rope holes for threading rope one of the U-belt one module, and two second rope holes for threading rope two of the U-belt two module. A third rope hole is provided between the two first rope holes and the two second rope holes respectively.

[0030] The straight tape module passes two straight tapes through the third rope hole and presses the straight tapes together with the face paper.

[0031] The straight-stripe module passes two straight strips through the cardboard, eventually forming two drawstrings on both sides of the middle of the paper bag. Once tied together, these drawstrings prevent the items inside the bag from jumping or falling out.

[0032] The solution is further optimized so that there are two sets of the straight-line module, and they operate simultaneously.

[0033] A single straight tape applicator module includes a straight tape applicator conveyor, a clamping tape pull-down mechanism, a pressing tape mechanism, a clamping tape assembly, a cutting tool assembly, a tape cutting mechanism, and a straight tape applicator spraying and pressing mechanism; the clamping tape assembly and the cutting tool assembly are arranged side by side and connected as one unit;

[0034] The straight belt conveyor is located at the top and conveys the straight belt downwards. The end of the straight belt is clamped by the clamping belt pull-down mechanism and pulled down to a set length. The pressing belt mechanism is located at the upper middle part of the straight belt in the vertical direction and presses the straight belt. The inserting knife assembly moves to the corresponding position of the straight belt. The clamping belt assembly clamps the straight belt. The cutting belt mechanism cuts the straight belt. The upper end of the cut straight belt covers the upper part of the inserting knife assembly.

[0035] The inserter assembly moves to directly below the third rope hole and passes the straight strip through the third rope hole. The adhesive bonding mechanism then presses the straight strip passing through the third rope hole together with the face paper.

[0036] This utility model has the following technical advantages compared with the prior art:

[0037] This paper bag opening folding device and fully automatic paper bag threading machine replace manual labor with automated equipment, resulting in high production efficiency and reduced product costs through mass production. It significantly improves the durability and length consistency of the drawstrings on tote bags, thereby enhancing product quality. The threading machine can adapt to different sizes of cardboard sheets, meeting the production needs of paper bags of various sizes and types. Attached Figure Description

[0038] Figure 1 This is a perspective view of one specific embodiment of the fully automatic paper bag threading machine of this utility model;

[0039] Figure 2 yes Figure 1 A plan view of the face sheet in the threading machine;

[0040] Figure 3 yes Figure 1 Plan view of U-belt 1 and U-belt 2 in the threading machine;

[0041] Figure 4 yes Figure 1 A plan view of the straight belt in a belt threading machine;

[0042] Figure 5 yes Figure 1 A plan view of the inner lining paper block in the threading machine;

[0043] Figure 6 yes Figure 1A 3D view of the middle-surface paper material storage module;

[0044] Figure 7 yes Figure 6 A stereoscopic view from another perspective;

[0045] Figure 8 yes Figure 6 A 3D view of the upper and lower drive mechanism;

[0046] Figure 9 yes Figure 1 3D view of the feed and alignment module;

[0047] Figure 10 yes Figure 9 A stereoscopic view from another perspective;

[0048] Figure 11 yes Figure 10 A stereoscopic view from another perspective;

[0049] Figure 12 yes Figure 11 A 3D view of the central guiding mechanism;

[0050] Figure 13 yes Figure 12 Exploded view of the counterweight ball bearing installation;

[0051] Figure 14 yes Figure 11 A stereoscopic view from another perspective;

[0052] Figure 15 yes Figure 1 A 3D view of the first cardboard pasting module;

[0053] Figure 16 yes Figure 1 A 3D view of the second cardboard pasting module;

[0054] Figure 17 yes Figure 15 and Figure 16 A three-dimensional view of the cardboard feeding mechanism;

[0055] Figure 18 yes Figure 1 A 3D view of the first cardboard-attaching module clamping the faceplate.

[0056] Figure 19 yes Figure 15 A stereoscopic view from another perspective;

[0057] Figure 20 yes Figure 1 A 3D view of a module with a U-shaped strip running through it.

[0058] Figure 21 yes Figure 1 A 3D view of the two modules with the U-shaped strip in the middle;

[0059] Figure 22 yes Figure 20 and Figure 21 A three-dimensional diagram of the conveyor belt, cutting, U-belt formation, passing through the faceboard, and pressing structure;

[0060] Figure 23 This is a stereoscopic view of body 22 from another perspective;

[0061] Figure 24 Figure 1 3D view of the center-mounted straight-line module;

[0062] Figure 25 yes Figure 24 A three-dimensional view of the conveyor belt system for cutting, passing through the faceboard, and pressing.

[0063] Figure 26 yes Figure 25 A three-dimensional diagram of the related structures of a single unit;

[0064] Figure 27 yes Figure 26 A three-dimensional view of the interior without the cover plate;

[0065] Figure 28 yes Figure 27 A stereoscopic view from another perspective;

[0066] Figure 29 yes Figure 1 A three-dimensional view of a paper bag opening folding device, a circular conveyor chain, and several trays integrated into one unit;

[0067] Figure 30 yes Figure 29 A three-dimensional view of the center support clip;

[0068] Figure 31 yes Figure 30 A stereoscopic view from another perspective;

[0069] Figure 32 yes Figure 1 A three-dimensional view of the paper bag opening folding device;

[0070] Figure 33 yes Figure 32 A stereoscopic view from another perspective;

[0071] Figure 34 yes Figure 32 A perspective view of the cardboard creasing mechanism, cardboard folding and pressing mechanism, and related structures;

[0072] Figure 35 yes Figure 34 A stereoscopic view from another perspective;

[0073] Figure 36 yes Figure 34 A three-dimensional view of the cardboard creasing mechanism and the cardboard folding and pressing mechanism;

[0074] Figure 37 yes Figure 36 A stereoscopic view from another perspective.

[0075] In the figure: paper storage module 100, storage plate 110, paper suction and conveying mechanism 120, first suction cup 121, first up and down cylinder 122, suction cup horizontal movement cylinder 123, up and down drive mechanism 130, reduction motor 131, chain and sprocket transmission assembly 132, guide rail slider assembly 140;

[0076] Feeding guide module 200, conveying mechanism 210, conveyor belt 211, motor roller assembly 212, guiding mechanism 220, guiding plate 221, upper pressure plate 222, lower pressure plate 223, guiding moving cylinder 224, guiding upper and lower cylinder 225, counterweight ball 226, moving mechanism 230, second suction cup 231, second upper and lower cylinder 232, servo synchronous belt drive mechanism 233;

[0077] Paperboard applicator 300, paperboard placement frame 310, paperboard applicator mechanism 320, third suction cup 321, third moving cylinder 322, servo synchronous belt rotation mechanism 323, rotating shaft 324, cold glue spraying mechanism 330, opening mechanism 340, opening block 341, opening cylinder 342;

[0078] Module 1 for attaching U-belt 400, U-belt conveying mechanism 410, U-belt forming mechanism 420, rope threading mechanism 430, rotating rope picking mechanism 440, U-belt spraying and pressing mechanism 450, and U-belt second module 500.

[0079] Straight tape application module 600, straight tape application rope conveyor mechanism 610, clamping rope pull-down mechanism 620, pull-down drive motor 621, pull-down synchronous belt transmission assembly 622, clamping pneumatic finger 623, front clamp 624, rear clamp 625, rope pressing mechanism 630, pressing seat 631, pressing seat cylinder 632, pressing block 633, pressing block cylinder 634, rope cutting mechanism 640, hot cutting knife 641, cutting knife moving cylinder 642, clamping rope assembly 650, inserting knife assembly 660, straight tape application glue spraying and pressing mechanism 670;

[0080] Paper bag opening folding device 700, linear guide plane 710, annular conveyor chain 720, support clamp 730, front fixed seat 731, rear fixed seat 732, rotating rod 733, upper fixed clamp 734, lower movable clamp 735, torsion spring 736, opening rod 737, linear rail 740, sprocket drive mechanism 750, cardboard creasing mechanism 760, creasing plate 761, creasing servo rack and pinion drive mechanism 762, first rack 763, cardboard folding and pressing mechanism 770, folding plate 771, folding forward and backward moving mechanism 772, folding servo rack and pinion drive mechanism 772a, second rack 772b, folding up and down moving mechanism 773, folding up and down cylinder 773a, opening pressure plate 780;

[0081] Paperboard A, first rope hole A1, second rope hole A2, third rope hole A3, fold line A4, rope belt one B1, rope belt two B2, straight strip B3, inner lining paper block C. Detailed Implementation

[0082] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0083] like Figures 1 to 37 As shown, one specific embodiment of the fully automatic paper bag threading machine of this utility model is described, wherein... Figures 32 to 37 This describes a specific implementation method for a paper bag opening folding device.

[0084] like Figure 32 and Figure 33 As shown, the paper bag opening folding device 700 includes a frame 790, on which a cardboard creasing mechanism 760 and a cardboard folding and pressing mechanism 770 are provided;

[0085] The cardboard creasing mechanism 760 is positioned above the conveying direction, and its downward movement presses down on the fold line A4 of the face cardboard A;

[0086] The cardboard folding and pressing mechanism 770 is set on the upper side parallel to the conveying direction. Its vertical movement, combined with its up and down movement, folds and presses the edge of the face cardboard A along the folding line A4 into one piece.

[0087] like Figure 34 and Figure 35 As shown, the cardboard creasing mechanism 760 is inclined upward, and includes a creasing plate 761 and a creasing servo rack and pinion transmission mechanism 762.

[0088] like Figure 36 As shown, the crease servo rack and pinion transmission mechanism 762 has a first rack 763 that moves back and forth. The crease plate 761 is connected to the first rack 763. The back and forth movement of the first rack 763 drives the crease plate 761 to move obliquely up and down. The crease plate 761 moves obliquely down to press the fold line A4 of the face paper A.

[0089] The cardboard folding and pressing mechanism 770 includes a folding plate 771, a folding forward and backward moving mechanism 772, and a folding up and down moving mechanism 773; the folding plate 771 is horizontally arranged and connected to the folding forward and backward moving mechanism 772, and the folding forward and backward moving mechanism 772 is connected to the folding up and down moving mechanism 773.

[0090] The forward and backward folding mechanism 772 drives the folding plate 771 to move back and forth perpendicular to the conveying direction, and the up and down folding mechanism 773 drives the folding plate 771 and the forward and backward folding mechanism 772 to move up and down together.

[0091] like Figure 37 As shown, the folding forward and backward moving mechanism 772 includes a folding servo rack and pinion transmission mechanism 772a, which has a second rack 772b that moves back and forth. The back and forth movement of the second rack 772b drives the folding plate 771 to move back and forth perpendicular to the conveying direction.

[0092] The folding up and down moving mechanism 773 includes folding up and down cylinders 773a arranged in parallel at both ends. The piston rod end of the cylinder is connected to the folding forward and backward moving mechanism 772. The folding up and down cylinders 773a drive the folding plate 771 and the folding forward and backward moving mechanism 772 to move up and down together.

[0093] The operation process of the paper bag opening folding device 700 is as follows:

[0094] 1. The cardboard creasing mechanism 760 moves diagonally downward to press the fold line A4 on the edge of the face cardboard A; at the same time, the cardboard folding and pressing mechanism 770 moves forward to below the edge of the face cardboard A.

[0095] 2. The cardboard folding and pressing mechanism 770 moves up to above the folding line A4, and the edge of the face cardboard A is folded to 90°;

[0096] 3. The cardboard folding and pressing mechanism 770 moves forward a distance, which is at least the width of the folded part, to fold the part into a horizontal shape;

[0097] 4. The cardboard creasing mechanism returns at 760 degrees;

[0098] 5. The cardboard folding and pressing mechanism 770 presses down to flatten and glue the folded parts together.

[0099] like Figure 32 and Figure 33 As shown, the paper bag opening folding device 700 has an opening pressure plate 780 at its outlet end. When the tray 730 passes the opening pressure plate 780, the opening rod 737 of the tray 730 is pressed down by the opening pressure plate 780, the tray 730 is opened, and the face paper A is released.

[0100] This utility model also discloses a specific embodiment of a fully automatic paper bag threading machine, the specific structure of which is as follows:

[0101] like Figure 1 As shown, the fully automatic paper bag threading machine of this embodiment includes a face paper material storage module 100, a feeding guide module 200, a cardboard pasting module 300, a U-belt threading module 400, a U-belt threading module 500, a straight belt pasting module 600, and the aforementioned paper bag opening folding device 700, which are connected in sequence.

[0102] A linear guide plane 710, a circular conveyor chain 720, and several clamps 730 are horizontally arranged between the outlet of the feed guiding module 200 and the end of the paper bag opening folding device 700. The clamps 730 are arranged on the circular conveyor chain 720, and the spacing between them is adapted to the process module; the circular conveyor chain 720 and the clamps 730 are arranged as follows: Figure 29 As shown;

[0103] The paper stock module 100 sequentially conveys single sheets of paperboard A to the feeding guide module 200. The feeding guide module 200 guides the paperboard A to a position perpendicular to the conveying direction and moves it to its exit position. The clamp 730 clamps the paperboard A. The circular conveyor chain 720 rotates, driving the clamp 730 to move. The paperboard A clamped by the clamp 730 moves to the subsequent process module on the linear guide plane 710. The paper bag opening folding device 700 folds the edge of the paperboard A and presses it together.

[0104] like Figure 19 and Figure 32 As shown, the circular conveyor chain 720 is driven by the sprocket transmission mechanism 750 at the inlet end of the cardboard module 300 and the outlet end of the paper bag opening folding device 700.

[0105] This fully automatic paper bag threading machine combines various process modules, each performing a different function. The face paper material storage module 100 stacks face paper A and continuously conveys it to the feeding and guiding module 200 for guidance. After guidance, the face paper A is clamped by the clamp 730 and transmitted to the subsequent module through the circular conveyor chain 720 to complete the corresponding actions. The circular conveyor chain 720 drives the clamp 730 to rotate cyclically, continuously conveying face paper A and connecting the various process modules together. The connection between them does not require manual operation, greatly improving production efficiency.

[0106] like Figure 1 As shown, there are two sets of cardboard pasting modules 300 arranged side by side. The cardboard pasting module 300 attaches the inner liner paper block C to the edge of the face paper A.

[0107] like Figure 2 and Figure 5 As shown, the cardboard pasting module 300 pastes the inner liner paper block C to the corresponding position on the edge of the face paper block A. Figure 2(The position of the midpoint line box) enhances the edge strength, enabling the formed paper bag to lift heavier items and making the handles less likely to be damaged or fall off.

[0108] like Figure 1 and Figure 15 As shown, five linear rails 740 are arranged side-by-side between the outlet of the feed guiding module 200 and the end of the paper bag opening folding device 700. The linear rails 740 are disconnected on each process module, and the upper surface of the linear rails 740 forms a linear guide plane 710. The linear guide plane 710 is used to support the face paper A during the transmission process.

[0109] like Figure 29 As shown, the annular conveyor chain 720 consists of two parallel chains, each connected to a clamp 730; the chains are driven to rotate by a sprocket transmission mechanism 750.

[0110] like Figure 6 As shown, the paper storage module 100 includes a storage plate 110 and a paper suction and conveying mechanism 120, with the paper suction and conveying mechanism 120 located directly above the storage plate 110.

[0111] The storage plate 110 moves up and down, and stacked face paper A is placed on it;

[0112] like Figure 7 As shown, the paper suction conveying mechanism 120 includes three first suction cups 121. The first suction cups 121 pick up the paper sheet A, and the paper suction conveying mechanism 120 conveys the picked-up paper sheet A to the feeding guide module 200 along the conveying direction.

[0113] The paper feeding and conveying mechanism 120 can continuously feed single sheets of paperboard A into the feeding and guiding module 200 by moving back and forth along the conveying direction.

[0114] like Figure 6 and Figure 7 As shown, the paper feed module 100 also includes an up-and-down drive mechanism 130 and four sets of guide rail slider assemblies 140;

[0115] like Figure 8 As shown, the upper and lower drive mechanism 130 is equipped with a reduction motor 131 to drive two sets of chain and sprocket transmission assemblies 132 to rotate. The two sets of chain and sprocket transmission assemblies 132 are respectively arranged on both sides of the storage plate 110, and their chains are respectively connected to both sides of the storage plate 110.

[0116] Four sets of guide rail slider assemblies 140 are vertically arranged on both sides of the storage plate 110, and their sliders are respectively connected to both sides of the storage plate 110.

[0117] The geared motor 131 rotates in both directions, driving the storage plate 110 to move up and down along the guide rail slider assembly 140 via the chain and sprocket transmission assembly 132.

[0118] like Figure 7 As shown, the paper conveying mechanism 120 also includes a first up-and-down cylinder 122 and a suction cup horizontal movement cylinder 123. The first up-and-down cylinder 122 drives the first suction cup 121 to move up and down to pick up the paperboard A. The suction cup horizontal movement cylinder 123 drives the first suction cup 121 to move back and forth along the conveying direction to convey the picked-up paperboard A to the feeding guide module 200.

[0119] like Figure 9 As shown, the feeding and guiding module 200 includes a conveying mechanism 210, a guiding mechanism 220, and a moving mechanism 230;

[0120] The conveying mechanism 210 carries the face paper A, and the conveying mechanism 210 rotates cyclically to convey the face paper A forward along the conveying direction;

[0121] The guiding mechanism 220 is located on one side of the conveying mechanism 210. The guiding mechanism 220 moves back and forth along a direction perpendicular to the conveying direction to guide the edge of the front paperboard A.

[0122] like Figure 14 As shown, the moving mechanism 230 uses four parallel second suction cups 231 to pick up the straightened face paper A and moves it forward to the position where the clamp 730 clamps it.

[0123] The conveying mechanism 210 is used to convey the face paper A forward; the guiding module is used to guide the face paper A to a position perpendicular to the conveying direction to meet the positioning requirements of the subsequent process module; the moving mechanism 230 fixes the guided face paper A to keep its position unchanged and conveys it forward to the position of the clamp 730 of the next process module, so that the clamp 730 can clamp the face paper A and convey it forward.

[0124] like Figure 10 As shown, the conveying mechanism 210 includes four conveyor belts 211 arranged in parallel along the conveying direction. The conveyor belts 211 are driven to rotate by the motor roller assembly 212. The feed guide module 200 is equipped with rollers at both ends, one end of which is driven to rotate by a motor through a synchronous belt and synchronous pulley transmission mechanism.

[0125] like Figure 11 As shown, the guiding mechanism 220 consists of two sets arranged in parallel, and the spacing between them can be adjusted.

[0126] like Figure 12 and Figure 13 As shown, a single set of guiding mechanism 220 includes a guiding plate 221, an upper pressure plate 222, a lower pressure plate 223, a guiding moving cylinder 224, and a guiding upper and lower cylinder 225;

[0127] The guide plate 221 is vertically arranged and has a guide plane parallel to the conveying direction; the guide plate 221 is connected to the piston rod end of the guide moving cylinder 224, and the guide moving cylinder 224 drives the guide plate 221 to move back and forth horizontally perpendicular to the conveying direction.

[0128] The upper and lower guide cylinder 225 is fixed on the guide plate 221, and its piston rod end is connected to the upper pressure plate 222; the upper pressure plate 222 is located above the face paper A, and the lower pressure plate 223 is located below the face paper A and opposite to the upper pressure plate 222; the upper and lower guide cylinder 225 drives the upper pressure plate 222 to move down and press the face paper A.

[0129] like Figure 14 As shown, the moving mechanism 230 also includes a second upper and lower cylinder 232 and a servo synchronous belt drive mechanism 233 disposed above the face paper A; the servo synchronous belt drive mechanism 233 drives the synchronous pulley and synchronous belt drive parts to move through the servo motor, the servo motor rotates forward and backward, and the synchronous belt moves back and forth.

[0130] like Figure 14 As shown, four second suction cups 231 are connected to the piston rod end of the second upper and lower cylinders 232. The cylinder body of the second upper and lower cylinders 232 is connected to the synchronous belt of the servo synchronous belt drive mechanism 233. The servo synchronous belt drive mechanism 233 drives the second upper and lower cylinders 232 to move back and forth along the conveying direction, thereby moving the paperboard A picked up by the second suction cups 231 to the clamping position of the tray 730.

[0131] like Figure 13 As shown, the guiding mechanism 220 includes a counterweight ball 226, which is freely disposed on the upper part of the upper pressure plate 222. The counterweight ball 226 presses the face paper A flat on the surface of the lower pressure plate 223 by its gravity.

[0132] The advantage of the counterweight ball bearing 226 is that after it flattens the face paper A by its own weight, during the return process of the guiding mechanism 220, the contact area between the counterweight ball bearing 226 and the face paper A is small and it can roll. The friction between the counterweight ball bearing 226 and the face paper A is rolling friction with very low friction force. In this way, the position of the face paper A will not change during the return process of the guiding mechanism 220, and the face paper A will not be scratched or damaged. This structure is simple, reliable, and has a novel and meticulous design.

[0133] like Figure 15 and Figure 16 As shown, the cardboard applicator 300 includes a cardboard placement frame 310 located on its upper side and a cardboard applicator mechanism 320.

[0134] The paperboard placement frame 310 is tilted upwards and has stacked inner lining paper blocks C placed inside it. The edges of the inner lining paper blocks C are limited on both sides at the lower end. The width of the paperboard placement frame 310 can be adjusted to accommodate inner lining paper blocks C of different lengths.

[0135] The cardboard picking and pasting mechanism 320 uses several third suction cups 321 to pick up the lower outer linerboard block C and pull it outward. The cardboard picking and pasting mechanism 320 rotates the pulled-out linerboard block C to face the edge of the cardboard A and moves it downward to press the two together.

[0136] The paper pick-and-place mechanism 320 uses the third suction cup 321 to pick up the inner paper block C and pull it outwards, which is very smooth and convenient to remove the inner paper block C from the paper placement frame 310. This action can be achieved as long as the suction force of the third suction cup 321 is greater than the friction force between the two ends of the inner paper block C and the limiting edge of the paper placement frame 310.

[0137] After the inner liner paper block C is removed, the inner liner paper block C, which is stacked inside the paper placement frame 310, slides down and sticks to the limiting edge under the action of natural gravity because the paper placement frame 310 is tilted upward. In other words, the conveying of the inner liner paper block C can be achieved without a separate additional mechanism.

[0138] The paper placement frame 310 and paper picking and pasting mechanism 320 of the paper pasting module 300 have simple structure, low cost, simple and reliable operation, and are easy to implement.

[0139] like Figure 15 and Figure 16 As shown, the paper placement frame 310 and the paper picking and pasting mechanism 320 each include two sets and are arranged side by side;

[0140] like Figure 17 As shown, the paper picking and pasting mechanism 320 includes a third moving cylinder 322 and a servo synchronous belt rotating mechanism 323. A plurality of third suction cups 321 are fixed to the piston rod end of the third moving cylinder 322. The third moving cylinder 322 drives the third suction cups 321 to extend or retract.

[0141] like Figure 19 As shown, the servo synchronous belt rotation mechanism 323 has a cylinder body with a rotating shaft 324 connected to a third moving cylinder 322. The servo synchronous belt rotation mechanism 323 drives the rotating shaft 324 to rotate, which in turn drives the third moving cylinder 322 to rotate, so that the inner liner paper block C picked up by the third suction cup 321 is rotated to face the edge of the cardboard A. The servo synchronous belt rotation mechanism 323 includes a servo motor, a master-slave synchronous pulley and a synchronous belt. When the servo motor rotates, the synchronous pulley and synchronous belt drive the rotating shaft 324 to rotate.

[0142] The servo synchronous belt rotation mechanism 323 is a set, which drives two sets of paper picking and pasting mechanisms 320 simultaneously through the rotation shaft 324 to achieve rotation.

[0143] like Figure 18As shown, before the feeding and guiding module 200 conveys the face paper A to the cardboard pasting module 300, the opening mechanism 340 presses down to open the corresponding clamp 730, and the face paper A is conveyed into the clamp 730. The opening mechanism 340 then moves up to close the clamp 730, and the clamp 730 clamps the face paper A and conveys it forward along the conveying direction. The opening mechanism 340 includes an opening block 341 and an opening cylinder 342. The opening block 341 is connected to the piston rod end of the opening cylinder 342, and the opening cylinder 342 drives the opening block 341 to move up and down.

[0144] like Figure 19 As shown, the cardboard module 300 also includes a cold glue spraying mechanism 330, which sprays glue onto the edge of the face paper A. The glue spraying facilitates the pasting and pressing of the inner liner paper C together.

[0145] like Figure 20 As shown, the U-shaped tape module 400 passes the rope B1 through one of the two first rope holes A1 of the face paper A, and presses the rope B1 and the face paper A together.

[0146] like Figure 21 As shown, the U-shaped tape module 500 passes the second rope B2 through the other two second rope holes A2 of the face paper A, and presses the second rope B2 and the face paper A together.

[0147] The rope is automatically converted into a U-belt by the U-belt threading module 400 and the U-belt threading module 500, and then passed through the face paper A. Finally, the two are pressed together. The automated operation is highly efficient, the rope length is consistent, and the product quality is improved.

[0148] like Figure 22 and Figure 23 As shown, the first module 400 and the second module 500 for attaching U-belts respectively include a U-belt conveying mechanism 410, a U-shaped rope forming mechanism 420, a rope threading mechanism 430, a rotating rope picking mechanism 440, and a U-belt spraying and pressing mechanism 450. These mechanisms are identical in structure to those in the application with application number 2025205403375, entitled "An Automated Rope Attaching Device for Handbags". The specific structural details are incorporated here.

[0149] like Figure 2As shown, the face paper A has two first rope holes A1 for threading the first U-belt module 400 and the first rope B1, and two second rope holes A2 for threading the second U-belt module 500 and the second rope B2. A third rope hole A3 is provided between the two first rope holes A1 and the two second rope holes A2. The straight strip module 600 passes the two straight strips B3 through the third rope holes A3 respectively, and presses the straight strips B3 with the face paper A as a whole.

[0150] like Figure 2 , Figure 3 and Figure 4 As shown, the shaded portions of the ends of U-band 1 and U-band 2 are pasted onto the shaded portions corresponding to the first rope hole A1 and the second rope hole A2 of the faceboard A; the shaded portion of the end of the straight band B3 is pasted onto the shaded portion corresponding to the third rope hole A3 of the faceboard A.

[0151] The straight strap module 600 passes two straight straps B3 through the face paper A, eventually forming two straps on both sides of the middle of the paper bag. After being tied together, they prevent the items inside the bag from jumping or even falling out.

[0152] like Figure 24 and Figure 25 As shown, there are two sets of the 600 adhesive strip module, and they operate simultaneously.

[0153] The single-set straight tape applicator module 600 includes a straight tape applicator conveyor mechanism 610, a clamping tape pull-down mechanism 620, a pressing tape mechanism 630, a clamping tape assembly 650, a cutting tool assembly 660, a tape cutting mechanism 640, and a straight tape applicator spraying and pressing mechanism 670; the clamping tape assembly 650 and the cutting tool assembly 660 are arranged side by side and connected as one unit;

[0154] The straight belt conveyor 610 is located at the top and conveys the straight belt B3 downward. The end of the straight belt B3 is clamped by the clamping belt pull-down mechanism 620 and pulled down to a set length. The pressing belt mechanism 630 is located at the upper middle part of the straight belt B3 in the vertical direction and presses the straight belt B3. The inserting knife assembly 660 moves to the corresponding position of the straight belt B3. The clamping belt assembly 650 clamps the straight belt B3. The cutting belt mechanism 640 cuts the straight belt B3. The upper end of the cut straight belt B3 covers the upper part of the inserting knife assembly 660.

[0155] The inserter assembly 660 moves to directly below the third rope hole A3 and passes the straight strip B3 through the third rope hole A3. The straight strip adhesive spraying and pressing mechanism 670 presses the straight strip B3 that has passed through the third rope hole A3 into the face paper A.

[0156] like Figure 28 As shown, the clamping rope pull-down mechanism 620 includes a pull-down drive motor 621, a pull-down synchronous belt transmission assembly 622, a clamping pneumatic finger 623, a front clamp 624, and a rear clamp 625;

[0157] The front clamp 624 and the rear clamp 625 are respectively connected to both sides of the clamping pneumatic finger 623 for clamping the straight belt B3;

[0158] The pull-down synchronous belt drive assembly 622 is vertically arranged, and the clamping pneumatic finger 623 is connected to its synchronous belt;

[0159] The pull-down drive motor 621 drives the pull-down synchronous belt transmission assembly 622 to rotate in both directions, thereby driving the clamping pneumatic finger 623 to move up and down.

[0160] like Figure 28 As shown, the rope tightening mechanism 630 includes a tightening seat 631, a tightening seat cylinder 632, a tightening block 633, and a tightening block cylinder 634.

[0161] The clamping seat 631 is fixed to the piston rod end of the clamping seat cylinder 632, the clamping block 633 is fixed to the piston rod end of the clamping block cylinder 634, and the cylinder body of the clamping block cylinder 634 is fixed on the clamping seat 631.

[0162] The action of the pressure block cylinder 634 drives the pressure block 633 to move and press the straight belt B3 onto the surface of the pressure seat 631; the action of the pressure seat cylinder 632 drives the pressure seat 631 to move and cause the straight belt B3 to tilt in the vertical direction toward the position of the insert assembly 660.

[0163] like Figure 27 As shown, the rope cutting mechanism 640 includes a hot cutting blade 641 and a cutting blade moving cylinder 642;

[0164] The hot cutting blade 641 is fixed to the piston rod end of the cutting blade moving cylinder 642. The cutting blade moving cylinder 642 drives the hot cutting blade 641 to extend and cut the straight strip B3.

[0165] like Figure 25 and Figure 26 As shown, the straight-belt conveying mechanism 610, the clamping rope assembly 650, the inserting knife assembly 660, and the straight-belt spraying and pressing mechanism 670 in the straight-belt module 600 have the same structure as the rope conveying mechanism, the clamping rope assembly, the inserting knife assembly, and the spraying and pressing mechanism in application number 2025205403375, entitled "An Automated Rope Threading Device for Handbags". The specific structural details are incorporated here.

[0166] like Figure 30 and Figure 31 As shown, the clamp 730 includes a front fixed seat 731, a rear fixed seat 732, a rotating rod 733, an upper fixed clamp 734, several lower movable clamps 735, several torsion springs 736, and an opening rod 737.

[0167] The front fixing seat 731 and the rear fixing seat 732 are located at both ends of the bracket 730, and the lower part of the front fixing seat 731 and the rear fixing seat 732 is connected to the annular conveyor chain 720.

[0168] The rotating rod 733 is rotatably mounted on the upper part between the front fixed seat 731 and the rear fixed seat 732;

[0169] The upper fixing clip 734 is fixedly connected to the upper side of the front fixing seat 731 and the rear fixing seat 732;

[0170] Several lower movable clamps 735 are rotatably mounted on the rotating rod 733 and are spaced apart from each other; the lower movable clamps 735 have a flat plate structure extending below the upward fixed clamp 734;

[0171] Several torsion springs 736 are installed through the rotating rod 733 and adapted to the lower movable clamp 735. One of their extended ends overlaps the upper surface of the upper fixed clamp 734, and the other extended end extends into the lower movable clamp 735. The elasticity of the two extended ends of the torsion springs 736 makes the flat plate structure of the lower movable clamp 735 fit tightly against the lower surface of the upper fixed clamp 734.

[0172] The opening lever 737 is located outside the front fixed seat 731 and connected to the end of the rotating rod 733. Pressing down the opening lever 737 causes the rotating rod 733 to rotate, and the corresponding flat plate structure of the lower movable clamp 735 leaves the lower surface of the upper fixed clamp 734, thereby opening the support clamp 730.

[0173] This paper bag opening folding device and fully automatic paper bag threading machine use an automated production line to replace manual labor, resulting in high production efficiency and reduced product costs through mass production. It significantly improves the durability and length consistency of the drawstrings on tote bags, thereby enhancing product quality. The production line can adapt to different sizes of cardboard sheets, meeting the production needs of paper bags of various sizes and types.

[0174] In summary, as described in the specification and figures, this utility model has been manufactured into actual samples and subjected to multiple use tests. The test results demonstrate that this utility model achieves its intended purpose, and its practicality is beyond doubt. The embodiments described above are merely for illustrative purposes and are not intended to limit the scope of this utility model. Any equivalent embodiments made by those with common knowledge in the relevant technical field, utilizing the technical content disclosed in this utility model, without departing from the scope of the technical features and similar features disclosed in this utility model, are all within the protection scope of this utility model.

Claims

1. A paper bag opening folding device, including a frame (790), characterized in that: The frame (790) is provided with a cardboard creasing mechanism (760) and a cardboard folding and pressing mechanism (770); a face cardboard (A) is provided below the cardboard creasing mechanism (760) on the frame (790); The cardboard creasing mechanism (760) is arranged above parallel to the conveying direction, and its downward movement presses down on the fold line (A4) of the cardboard (A). The cardboard folding and pressing mechanism (770) is arranged parallel to the conveying direction on the upper side. Its operation perpendicular to the conveying direction, along with its up and down movement, folds and presses the edge of the cardboard (A) along the folding line (A4) into a whole.

2. The paper bag opening folding device according to claim 1, characterized in that, The cardboard creasing mechanism (760) is inclined upward and includes a creasing plate (761) and a creasing servo rack and pinion transmission mechanism (762). The pressure servo rack and pinion transmission mechanism (762) has a first rack (763) that moves back and forth. The pressure plate (761) is connected to the first rack (763). The first rack (763) moves back and forth, causing the pressure plate (761) to move obliquely up and down. The pressure plate (761) moves obliquely down to press the fold line (A4) of the face paper (A).

3. The paper bag opening folding device according to claim 1, characterized in that, The cardboard folding and pressing mechanism (770) includes a folding plate (771), a folding forward and backward moving mechanism (772), and a folding up and down moving mechanism (773); the folding plate (771) is horizontally arranged and connected to the folding forward and backward moving mechanism (772), and the folding forward and backward moving mechanism (772) is connected to the folding up and down moving mechanism (773); The folding forward and backward moving mechanism (772) drives the folding plate (771) to move back and forth perpendicular to the conveying direction, and the folding up and down moving mechanism (773) drives the folding plate (771) and the folding forward and backward moving mechanism (772) to move up and down together.

4. The paper bag opening folding device according to claim 3, characterized in that, The folding forward and backward moving mechanism (772) includes a folding servo rack and pinion transmission mechanism (772a), which has a second rack (772b) that moves back and forth. The second rack (772b) moves back and forth, driving the folding plate (771) to move back and forth perpendicular to the conveying direction. The folding up and down moving mechanism (773) includes folding up and down cylinders (773a) arranged in parallel at both ends, with their piston rod ends connected to the folding forward and backward moving mechanism (772). The folding up and down cylinders (773a) drive the folding plate (771) and the folding forward and backward moving mechanism (772) to move up and down together.

5. A fully automatic paper bag threading machine, characterized in that: Includes the paper bag opening folding device as described in any one of claims 1 to 4.

6. The fully automatic paper bag threading machine according to claim 5, characterized in that, The paper bag opening folding device is provided with a paper material storage module (100), a feeding guide module (200), a U-belt first module (400), and a U-belt second module (500) connected in sequence. A linear guide plane (710), a ring conveyor chain (720), and several clamps (730) are horizontally arranged between the outlet of the feed guiding module (200) and the end of the paper bag opening folding device (700). Several clamps (730) are arranged on the ring conveyor chain (720) and the spacing between them is adapted to the process module. The paper stock module (100) sequentially conveys single sheets of paperboard (A) to the feeding guide module (200). The feeding guide module (200) guides the paperboard (A) at a position perpendicular to the conveying direction and moves it to its outlet position. The clamp (730) clamps the paperboard (A). The annular conveyor chain (720) rotates and drives the clamp (730) to move. The paperboard (A) clamped by the clamp (730) moves to the subsequent process module on the linear guide plane (710). The paper bag opening folding device (700) folds the edge of the paperboard (A) and presses it together.

7. The fully automatic paper bag threading machine according to claim 6, characterized in that, It also includes at least one cardboard applicator module (300) located between the feed guide module (200) and the U-belt applicator module (400), the cardboard applicator module (300) applicating the inner liner paper block (C) to the edge of the faceboard (A).

8. The fully automatic paper bag threading machine according to claim 6, characterized in that, The annular conveyor chain (720) consists of two parallel chains, each connected to a bracket (730); the chains are driven to rotate by a sprocket transmission mechanism (750).

9. The fully automatic paper bag threading machine according to claim 6, characterized in that, It also includes a tape-adhesive module (600) connected therein in sequence, the tape-adhesive module (600) being located after the feed guide module (200) and before the paper bag opening folding device (700); The faceboard (A) is provided with two first rope holes (A1) for the first rope (B1) of the first U-belt module (400), and two second rope holes (A2) for the second rope (B2) of the second U-belt module (500). A third rope hole (A3) is provided between the two first rope holes (A1) and the two second rope holes (A2). The straight tape module (600) passes the two straight tapes (B3) through the third rope hole (A3) respectively, and presses the straight tapes (B3) and the face paper (A) together.

10. The fully automatic paper bag threading machine according to claim 9, characterized in that, The straight-line module (600) consists of two sets, and they operate simultaneously. Each set of the straight tape applicator module (600) includes a straight tape applicator conveyor mechanism (610), a clamping tape pull-down mechanism (620), a tape pressing mechanism (630), a clamping tape assembly (650), a blade assembly (660), a tape cutting mechanism (640), and a straight tape applicator spraying and pressing mechanism (670); the clamping tape assembly (650) and the blade assembly (660) are arranged side by side and connected as one unit; The straight belt conveyor (610) is located at the top and conveys the straight belt (B3) downward. The end of the straight belt (B3) is clamped by the clamping belt pull-down mechanism (620) and pulled down to a set length. The pressing belt mechanism (630) is located at the upper middle part of the straight belt (B3) in the vertical direction and presses the straight belt (B3) tightly. The inserting knife assembly (660) moves to the corresponding position of the straight belt (B3). The clamping belt assembly (650) clamps the straight belt (B3). The cutting belt mechanism (640) cuts the straight belt (B3). The upper end of the cut straight belt (B3) covers the upper part of the inserting knife assembly (660). The inserter assembly (660) moves to directly below the third cord hole (A3) and passes the straight strip (B3) through the third cord hole (A3). The adhesive bonding mechanism (670) presses the straight strip (B3) that passes through the third cord hole (A3) together with the face paper (A).

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