Automatic square-bottom paper bag sealing device and method

Abstract

This invention provides an automatic sealing device and method for square-bottom paper bags. A transport mechanism is fixedly installed on the top of the frame plate. A bag clamping mechanism is installed above the transport mechanism, a bag pressing mechanism is installed on the front side of the transport mechanism, a labeling mechanism is installed above the bag folding mechanism, and a label rolling mechanism is installed on the far right side of the transport mechanism. An arc-shaped auxiliary guide rail is installed on the front side of the transport mechanism, and a tail baffle is installed on the rear side of the transport mechanism. A camera is installed above the bag folding mechanism via an L-shaped cantilever beam. A through-beam sensor is installed on the right side of the labeling mechanism. A pressure sensor is installed in the labeling mechanism, and a photoelectric sensor is installed on the upper crossbeam to adjust the intermittent movement of the conveyor belt. The control system identifies the belt tension through the camera image and the pressure sensor, and controls the transport mechanism, bag clamping mechanism, bag pressing mechanism, bag folding mechanism, labeling mechanism, and label rolling mechanism to operate according to the planned path and actions. This device can realize the automated sealing of paper bags.

Description

Technical Field

[0001] This invention belongs to the field of paper bag packaging technology, and particularly relates to an automatic sealing device and method for square-bottom paper bags. Background Technology

[0002] The process of sealing paper bags is highly repetitive and labor-intensive. Manually sealing paper bags requires folding, aligning, and gluing or sewing the seals, a relatively slow and time-consuming process. Prolonged exposure to this type of work can easily lead to operator fatigue, hand injuries, and other health problems. This not only affects operator welfare but may also cause a decrease in productivity due to health issues.

[0003] Chinese patent document CN116198805A, publication / announcement date: CN116198805A, discloses an automatic sealing and sewing packaging machine, including a frame and a clamping chain mounted on the frame for clamping and conveying materials. The upper end of the frame, along its length, is sequentially equipped with: an edge-folding component; a sewing component; a bag opening trimming component; a paper tape forming component; a traction component; a paper bag cutting component; a packaging tape heat-sealing component; and a packaging tape pressing component. The material is clamped by the clamping chain and passes sequentially through the edge-folding component, sewing component, bag opening trimming component, paper tape forming component, traction component, paper bag cutting component, heat-sealing component, and packaging tape pressing component. The beneficial effects of this invention are: edge-folding and sewing, and paper bag sewing and packaging tape are combined into one unit, suitable for occasions with many types of materials and diverse packaging methods. One machine can meet different production conditions and achieve multi-purpose functionality, resulting in good performance. Its shortcomings are that this device is a multi-machine integrated equipment with multiple mechanisms installed above the crossbeam. Uneven mass distribution can cause stress concentration when the crossbeam is under load. In addition, its internal structure is complex and it is not equipped with an emergency braking device. When a failure occurs, it is difficult to repair and may lead to a long maintenance cycle and high maintenance costs. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic sealing device and method for square-bottom paper bags, which can realize the automated sealing of paper bags.

[0005] To achieve the aforementioned technical features, the present invention aims to provide an automatic sealing device for square-bottom paper bags, comprising a frame plate, a transport mechanism fixedly mounted on the top of the frame plate, a bag clamping mechanism mounted above the transport mechanism, a bag pressing mechanism mounted on the front side of the transport mechanism, a labeling mechanism mounted above the bag folding mechanism, a label rolling mechanism mounted on the far right of the transport mechanism, an arc-shaped auxiliary guide rail mounted on the front side of the transport mechanism, a tail baffle mounted on the rear side of the transport mechanism, a camera mounted above the bag folding mechanism via an L-shaped cantilever beam, a through-beam sensor mounted on the right side of the labeling mechanism, a pressure sensor installed in the labeling mechanism, and a photoelectric sensor mounted on the upper crossbeam to adjust the intermittent movement of the conveyor belt. The control system identifies the conveyor belt tension through camera images and pressure sensor signals, and controls the transport mechanism, bag clamping mechanism, bag pressing mechanism, bag folding mechanism, labeling mechanism, and label rolling mechanism to operate according to the planned path and actions.

[0006] The transport mechanism includes drive wheels, which are symmetrically distributed on the left and right and synchronously connected to the drive shaft via keys. The drive shaft is supported by bearings in bearing housings. The bearing housings and the bearing housing support base plate are connected by bolt assemblies. The two drive shafts are driven by a conveyor belt. The bottom of the guide rail support has threaded holes at the four corners. The guide rail support is fixed to the frame plate by bolts. The bottom of the frame plate is provided with anti-slip ridges.

[0007] The tail baffle includes a vertical telescopic rod, a baffle connecting rod, a baffle support, and a baffle plate. The vertical telescopic rod is welded onto the baffle plate. The vertical telescopic rod is threaded and threadedly connected to the baffle connecting rod. The baffle connecting rod is fixed to the baffle support at equal intervals by set screws. The baffle support is fixed to the top side of the transport mechanism.

[0008] The bag clamping mechanism includes grippers, with symmetrical grippers on the left and right sides connected to the transverse clamping rod by high-strength bolts. The upper end of the gripper is pinned to the gear fixing plate by a pin. One end of the gripper connecting rod is connected to the gripper by bolts, and the other end is mounted on the gear fixing plate. The gear fixing plate is equipped with a pair of identical gears connected to the motor spindle by a key. The arc-shaped auxiliary guide rail and the tail baffle work together to prevent the paper bag from swinging back and forth during the bag clamping process. A trapezoidal pressure plate is installed above the arc-shaped auxiliary guide rail. The trapezoidal pressure plate is connected to the top cylinder by threads. The top cylinder is bolted to the transverse plate.

[0009] The bag-pressing mechanism includes a pointed transverse wedge-shaped pressure bar, which is located directly above the V-groove of the arc-shaped auxiliary guide rail. The pointed transverse wedge-shaped pressure bar is mounted on the lifting slide rail via a cantilever beam. A direct-acting cylinder is installed at the lower end of the lifting slide rail. The direct-acting cylinder is mounted on a U-shaped bracket via a bolt assembly and can realize the vertical lifting movement of the cantilever beam. Both ends of the cantilever beam are mounted on the lifting slide rail via sliding pairs to prevent the cantilever beam from tilting to the left or right.

[0010] The bottom horizontal part of the arc-shaped auxiliary guide rail is fixed to the front side of the guide rail by bolt assembly. The middle part of the arc-shaped auxiliary guide rail is welded to multiple guardrail lifting handles installed on the side of the guide rail support. The arc-shaped auxiliary guide rail is stamped. The front end of the arc-shaped auxiliary guide rail is provided with a V-shaped groove, which is conducive to the sharp horizontal wedge pressure bar to make indentation on the paper bag. The angle of the upper curved part of the arc-shaped auxiliary guide rail increases from 0 to right angle, so that the curved section at the front end of the paper bag gradually transitions from an acute angle to a right angle.

[0011] The bag folding mechanism includes a sleeve, the upper part of which is welded to a crossbeam. The sleeve has multiple pin holes, and the two are connected by pins, allowing for height adjustment. The crossbeam is welded from square steel. The upper crossbeam is equipped with multiple sets of limiting rollers, which, together with the tail baffle and the arc-shaped auxiliary guide rail, limit the paper bag. The bottom of the tripod is bolted to the frame plate. The bearing brackets are symmetrically mounted on the tripod with bolts. The rolling bearings are installed in the bearing brackets. The two ends of the crossbar are installed in the inner holes of the rolling bearings. Two horizontal cylinders are symmetrically distributed on the crossbar. The front end of the push rod of the horizontal cylinder is threadedly connected to an inclined push plate. An inclined cylinder is mounted on the middle of the inclined pressure rod at the top of the tripod. The front push rod of the inclined cylinder is threadedly connected to a U-shaped fork.

[0012] The labeling mechanism includes a rubber roller fixing plate, which is fixed to an L-shaped cantilever beam by bolts. Connecting plates are welded to both sides. A camera is connected to the L-shaped cantilever beam by screws to observe the sealing of the paper bag. A feeding tray is fixed to the upper part of the rubber roller fixing plate. A roll of adhesive tape is fitted onto the passive rubber roller on the feeding tray. Emergency brake pads are installed at the edges. A tensioning roller is located on the uppermost extension rod, and the tension of the tape is adjusted by adjusting the tensioning roller. A drive roller assembly is rotatably connected to the rubber roller fixing plate. A pressure plate is bolted to the rubber roller. At the bend, the lower right corner of the roller fixing plate is equipped with upper and lower pressure nozzles to peel the sticker off the tape. A servo motor is installed at the rear end of the pressure nozzles. A waste tray is located at the bottom of the roller fixing plate. Waste tape is collected on the active roller in the waste tray. The back of the waste tray is connected to a servo motor via belt drive. The tape speed can be controlled by the servo motor. A pressure sensor is installed in the dual-axis drive roller group in the middle of the roller fixing plate. The pressure sensor is electrically connected to the control system. When the pressure sensor detects that the tape pressure is too high, it transmits an electrical signal to the emergency brake pads and the servo motor stops working.

[0013] The rolling mark mechanism includes a roller, which is bolted to a wheel frame. The rotary motor is installed inside the wheel frame. Angle irons are mounted on both sides of the bottom of the electric cylinder and fixed to the angle steel frame by bolt groups. The other end is threaded into the wheel frame.

[0014] An automatic sealing method for square-bottom paper bags, the method employing an automatic sealing device for square-bottom paper bags, includes the following steps: S1. According to the specifications of the square bottom paper bag to be sealed, adjust the baffle at the end of the set screw to make it close to the bottom of the paper bag, adjust the height of the limit roller to make it close to the upper surface of the paper bag, and install the tape roll sticker on the feeding tray. S2. Start the device. When the paper bag moves on the conveyor belt to the first photoelectric sensor, the conveyor belt stops moving. The motor drives the gear to rotate, the gripper rotates and closes, and drives the horizontal clamping bar to press into the side of the paper bag. S3. The top cylinder of the bag clamping mechanism pushes the trapezoidal pressure plate downward to press the upper surface of the paper bag; S4. The grippers rotate and open, and the top cylinder drives the trapezoidal pressure plate to move up to its original position, and the conveyor belt moves. S5. When the paper bag reaches the V-shaped groove of the curved auxiliary guide rail, the conveyor belt stops moving, and the direct-acting cylinder below the bag pressing mechanism starts to work, driving the pointed horizontal wedge pressing rod to press the V-shaped groove, creating an indentation on the paper bag. S6. The direct-acting cylinder drives the pointed transverse wedge pressure rod to rise to its original position, and the conveyor belt moves. S7. Under the action of the curved auxiliary guide rail, the upper curved part of the paper bag gradually becomes right-angled during the movement of the indentation; S8. When the paper bag reaches directly below the labeling mechanism, the conveyor belt stops moving, and two horizontal cylinders push the inclined push plate forward to hold the lower bent part of the paper bag. S9. The tilting cylinder pushes the U-shaped fork to flatten the curved part at the top of the indentation. S10. The through-beam sensor located on the right side of the labeling mechanism transmits the signal to the servo motor at the lower end of the labeling mechanism, which in turn rotates the servo motor to make the servo motor rotate so that its front end is pressed tightly against the labeling bag. S11. The servo motor in the middle of the labeling mechanism starts to work, which in turn drives the active glue roller to rotate, thereby driving the tape roll sticker to rotate. The sticker is peeled off from the tape to the paper bag seal under the action of the nozzle. S12, the tilting cylinder drives the U-shaped fork to retract, the servo motor at the lower end of the labeling mechanism rotates, the nozzle returns to its original position, and the conveyor belt moves; S13. The electric cylinder above the label rolling mechanism pushes the wheel frame until the roller is close to the sticker. S14. The rotating motor drives the roller to rotate and crush the sticker; S15. The conveyor belt transports the square-bottomed paper bags that are to be sealed away. S16. Repeat steps S2-S15 until all paper bags are sealed. S17. When a camera installed on the L-shaped cantilever beam observes that the sticker is not tightly attached, the information is fed back to the control system, and each mechanism stops working. S18. The dual-shaft drive roller group in the middle of the rubber roller fixing plate is equipped with a pressure sensor. When the pressure sensor detects that the tape pressure is too high, it transmits an electrical signal to the emergency brake pad and the servo motor stops working at the same time, and emits an alarm sound to prompt personnel to adjust the tape or replace the tape roll sticker.

[0015] The present invention has the following beneficial effects: 1. Automatic bag sealing: This invention uses various flexible robotic arms and advanced sensors, which can work continuously without being limited by time and physical strength, further improving production efficiency, reducing manpower input, and also reducing management costs and labor risks.

[0016] 2. Production line integration: The automatic bag sealing device is integrated with automated equipment such as automatic paper feeder, printing machine, creasing machine, and bag cutter, realizing full automation from raw material processing to finished product output. This avoids waiting and interruptions between various links in traditional production and greatly improves production efficiency.

[0017] 3. Emergency braking device: The control system uses a camera to capture images and a pressure sensor to transmit the tension of the tape for identification. If the tape tension is too high or the sticker is not fully adhered, the drive devices will stop working, improving safety performance and reducing losses caused by accidents.

[0018] 4. Modular design: The process of forming, folding, labeling and other operations of paper bags is designed with different modules responsible for different functions. The modules can be flexibly combined and replaced to adapt to the production needs of different products. The modular design makes maintenance simple and convenient, so that when a single part of the machine fails, the module can be quickly replaced without affecting the use of other modules. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the present invention.

[0021] Figure 2 This is a three-dimensional schematic diagram from another perspective of the present invention.

[0022] Figure 3 This is a three-dimensional diagram of the transportation mechanism of the present invention.

[0023] Figure 4 This is the present invention. Figure 3 Partial schematic diagram of the transportation system in China.

[0024] Figure 5 This is a three-dimensional schematic diagram of the bag clamping mechanism designed in this invention.

[0025] Figure 6 This is a three-dimensional schematic diagram of the folding bag mechanism designed in this invention.

[0026] Figure 7 This is a front view of the labeling mechanism designed in this invention.

[0027] Figure 8 This is a partial enlarged view of the nozzle part of the labeling mechanism designed in this invention.

[0028] Figure 9 This is a three-dimensional schematic diagram of the roller label mechanism designed in this invention.

[0029] In the diagram: 01 transport mechanism, 011 drive wheel, 012 drive shaft, 013 conveyor belt, 014 bearing, 015 bearing housing, 016 guide rail support, 017 bearing housing support base plate; Bag clamping mechanism 02, gripper 021, transverse clamping rod 022, gear 023, gripper connecting rod 024, gear fixing plate 025, trapezoidal pressure plate 026, horizontal plate 027, motor 028, top cylinder 029; Bag pressing mechanism 03, pointed transverse wedge pressing rod 031, lifting slide rail 032, direct-acting cylinder 033, lifting slide rail 034, sliding pair 035, U-shaped bracket 036; Folding mechanism 04, limiting roller 041, sleeve 042, tripod 043, inclined push plate 044, U-shaped fork 045, horizontal cylinder 046, inclined cylinder 047, pressure rod 048, rolling bearing 049, bearing bracket 0410, crossbar 0411; Labeling mechanism 05, feeding tray 051, waste tray 052, tape roll sticker 053, glue roller fixing plate 054, tensioning glue roller 055, extension rod 056, active glue roller 057, passive glue roller 058, emergency brake pad 059, transmission roller group 0510, servo motor 0511, pressure nozzle 0512, connecting plate 0513, servo motor 0514, pressure plate 0515; Tail baffle 06, vertical telescopic rod 061, baffle connecting rod 062, baffle support 063, baffle plate 064; Rolling mark mechanism 07, roller 071, electric cylinder 072, angle steel frame 073, wheel frame 074, rotary motor 075; 08. Curved auxiliary guide rail, 081. Guardrail lifting handle, 9. L-shaped cantilever beam, 10. Frame plate, 11. Camera, 12. Photoelectric sensor, 13. Pressure sensor, 14. Through-beam sensor. Detailed Implementation

[0030] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0031] Example 1: See Figure 1-9An automatic sealing device for square-bottom paper bags includes a transport mechanism 01, a bag clamping mechanism 02, a bag pressing mechanism 03, a bag folding mechanism 04, a labeling mechanism 05, a tail baffle 06, a label rolling mechanism 07, an arc-shaped auxiliary guide rail 08, an L-shaped cantilever beam 9, a frame plate 10, a camera 11, a photoelectric sensor 12, a pressure sensor 13, a through-beam sensor 14, and a control system. The transport mechanism 01 is mounted on the frame plate 10, the bag clamping mechanism 02 is mounted above the transport mechanism 01, the bag pressing mechanism 03 is mounted in front of the transport mechanism 01, the labeling mechanism 05 is mounted above the bag folding mechanism 04, and the label rolling mechanism 07 is mounted on the far right of the transport mechanism 01. The arc-shaped auxiliary guide rail 08... Track 08 is installed on the front side of transport mechanism 01, and tail baffle 06 is installed on the rear side of transport mechanism 01. Camera 11 is installed above bag folding mechanism 04 via L-shaped cantilever beam. Through-beam sensor 14 is installed on the right side of labeling mechanism 05. Pressure sensor 13 is installed in labeling mechanism 05. Photoelectric sensor 12 is installed on upper crossbeam 0412. The intermittent movement of conveyor belt 013 is adjusted. The control system identifies the image captured by camera 11 and the tape tension transmitted by pressure sensor 13, and controls transport mechanism 01, bag clamping mechanism 02, bag pressing mechanism 03, bag folding mechanism 04, labeling mechanism 05, and label rolling mechanism 07 to operate according to the planned path and actions. The above-mentioned automatic bag sealing device can realize the automatic sealing of paper bags.

[0032] Preferably, the control system uses a PLC (Programmable Logic Controller) to achieve automated control of the entire device.

[0033] See Figure 1-4 The transport mechanism 01 consists of a drive wheel 011, a drive shaft 012, a conveyor belt 013, a bearing 014, a bearing housing 015, a guide rail support 016, and a bearing housing support base plate 017. The drive wheels 011 are symmetrically distributed on the left and right and synchronously connected to the drive shaft 012 via keys. The drive shaft 012 is supported by the bearing 014 in the bearing housing 015. The bearing housing 015 and the bearing housing support base plate 017 are connected by bolt assemblies. The two drive shafts 012 are driven by the conveyor belt 013. The guide rail support 016 has threaded holes cast at the four corners of its bottom and is fixed to the frame plate 10 by bolts. The bottom of the frame plate 10 is provided with anti-slip ridges. The transport mechanism 01 described above can be used for transporting paper bags. In specific operation, when the device is activated, the paper bag moves on the conveyor belt 013 to the first photoelectric sensor 12, and the conveyor belt 013 stops moving.

[0034] In the preferred solution, see Figure 1-3The tail baffle 06 consists of a vertical telescopic rod 061, a baffle connecting rod 062, a baffle support 063, and a baffle plate 064. The vertical telescopic rod 061 is welded onto the baffle plate 064, and the vertical telescopic rod 061 is threaded and threaded to the baffle connecting rod 062. The baffle connecting rod 062 is fixed to the baffle support 063 at an appropriate distance by a set screw. During operation, according to the specifications of the square-bottomed paper bag to be sealed, the tail baffle 06 is adjusted by tightening the set screw to make it close to the bottom of the paper bag.

[0035] For details, see Figure 5 The bag clamping mechanism 02 consists of grippers 021, a transverse clamping rod 022, a gear 023, a gripper connecting rod 024, a gear fixing plate 025, a trapezoidal pressure plate 026, a horizontal plate 027, a motor 028, and a top cylinder 029. The left and right symmetrical grippers 021 are connected to the transverse clamping rod 022 by high-strength bolts. The upper end of the gripper 021 is pinned to the gear fixing plate 025 by a pin to the gear 023. One end of the gripper connecting rod 024 is connected to the gripper 021 by bolts, and the other end is installed on the gear fixing plate 025. The gear fixing plate 025 is equipped with a pair of identical gears 023, which are connected to the main shaft of the motor 028 by a key. The arc-shaped auxiliary guide rail 08 and the tail baffle 06 work together to prevent the paper bag from swinging back and forth during the bag clamping process. A trapezoidal pressure plate 026 is installed above, and the trapezoidal pressure plate 026 is connected to the top cylinder 029 by threads. The top cylinder 029 is connected to the horizontal plate 027 by bolts. The aforementioned bag clamping mechanism 02 enables the paper bag to be clamped. During operation, the motor 028 drives the gear 023 to rotate, the gripper 021 rotates and closes, driving the horizontal clamping rod 022 to press into the side of the paper bag. The top cylinder 029 of the bag clamping mechanism pushes the trapezoidal pressing plate 026 downward to press the upper surface of the paper bag. The gripper 021 rotates and opens, and the top cylinder 029 drives the trapezoidal pressing plate 026 to move upward to its original position, and the conveyor belt 013 moves.

[0036] See Figure 1-2The bag pressing mechanism 03 consists of a pointed transverse wedge-shaped pressing rod 031, a lifting slide rail 032, a direct-acting cylinder 033, a cantilever beam 034, a sliding pair 035, and a U-shaped bracket 036. The pointed transverse wedge-shaped pressing rod 031 is located directly above the V-groove of the arc-shaped auxiliary guide rail 08. The pointed transverse wedge-shaped pressing rod 031 is mounted on the lifting slide rail 032 via the cantilever beam 034. A direct-acting cylinder 033 is mounted at the lower end of the lifting slide rail 032. The direct-acting cylinder 033 is mounted on the U-shaped bracket 036 via bolt assemblies, which can realize the vertical lifting and lowering movement of the cantilever. Both ends of the cantilever beam 034 are mounted on the lifting slide rail 032 via the sliding pair 035 to prevent the cantilever beam 034 from tilting left and right. The bag pressing mechanism 03 can be used for pressing. During the operation, the direct-acting cylinder 033 below the bag pressing mechanism 03 starts to work, driving the pointed transverse wedge pressing rod 031 to press to the V-shaped groove, creating an indentation on the paper bag; the direct-acting cylinder 033 drives the pointed transverse wedge pressing rod 031 to rise to the original position, and the conveyor belt 013 moves.

[0037] See Figure 1-4 The bottom horizontal part of the curved auxiliary guide rail 08 is fixed to the front side of the guide rail by bolt assembly. The middle part of the curved auxiliary guide rail 08 is welded to the four guardrail lifting handles 081 installed on the side of the guide rail support 016. The curved auxiliary guide rail 08 is stamped. The front end of the curved auxiliary guide rail 08 has a V-shaped groove, which facilitates the horizontal wedge pressure bar 031 to create an indentation on the paper bag. The angle of the upper curved part of the curved auxiliary guide rail 08 increases from 0° to a right angle, so that the curved section at the front end of the paper bag gradually transitions from an acute angle to a right angle. Under the action of the curved auxiliary guide rail 08, the upper curved part of the indentation on the paper bag gradually becomes a right angle during the movement.

[0038] For details, see Figure 1-2 and Figure 6The bag folding mechanism 04 consists of a limiting roller 041, a sleeve 042, a triangular frame 043, an inclined push plate 044, a U-shaped fork 045, a horizontal cylinder 046, an inclined cylinder 047, a pressure rod 048, a rolling bearing 049, a bearing bracket 0410, a crossbar 0411, and a crossbeam 0412. The upper part of the sleeve 042 is welded to the crossbeam 0412. The sleeve 042 has multiple pin holes, and the two are connected by pins, which can be adjusted appropriately. The crossbeam 0412 is welded from square steel. The upper crossbeam 0412 is equipped with multiple sets of limiting rollers 041, which, together with the tail baffle 06 and the arc-shaped auxiliary guide rail 08, play a limiting role for the paper bag. The bottom of the tripod 043 is bolted to the frame plate 10. The bearing bracket 0410 is symmetrically mounted on the tripod 043 by bolts. The rolling bearing 049 is installed in the bearing bracket 0410. The two ends of the crossbar 0411 are installed in the inner holes of the rolling bearing 049. Two horizontal cylinders 046 are symmetrically distributed and installed on the crossbar 0411. The front end of the push rod is threadedly connected to the inclined push plate 044. An inclined cylinder 047 is mounted on the middle of the inclined pressure rod 048 of the tripod 043. The front push rod of the inclined cylinder 047 is threadedly connected to the U-shaped fork 045. The bag folding mechanism 04 can be used for bag folding. During operation, when the paper bag reaches directly below the labeling mechanism 05, the conveyor belt 013 stops moving. The two horizontal cylinders 046 push the inclined push plate 044 forward to support the lower bent part of the paper bag. The inclined cylinder 047 pushes the U-shaped fork 045 to flatten the upper bent part of the crease.

[0039] For details, see Figure 1-2 and Figure 7-8The labeling mechanism 05 consists of a feeding tray 051, a waste tray 052, a roll-type adhesive tape label 053, a roller fixing plate 054, a tensioning roller 055, an extension rod 056, an active roller 057, a passive roller 058, an emergency brake pad 059, a transmission roller assembly 0510, a servo motor 0511, a pressure nozzle 0512, a connecting plate 0513, a servo motor 0514, and a pressure plate 0515. The roller fixing plate 054 is connected by bolts. Fixed to an L-shaped cantilever beam 9, with connecting plates 0513 welded to both sides, the L-shaped cantilever beam 9 is connected to a camera 11 via screws to observe the sealing of the paper bag. A feeding tray 051 is fixed to the upper part of a rubber roller fixing plate 054. A tape-type roll sticker 053 is fitted onto a passive rubber roller 058 on the feeding tray 051. Emergency brake pads 059 are installed at the edges. A tensioning rubber roller 055 is provided on the uppermost extension rod 056, and the tensioning rubber roller 055 can be adjusted. 5. Further adjust the tension of the tape. The transmission roller assembly 0510 is rotatably connected to the roller fixing plate 054. The pressure plate 0515 is bolted to the tape bend. The lower right corner of the roller fixing plate 054 is provided with upper and lower pressure nozzles 0512 to peel the sticker off the tape. The servo motor 0511 is installed at the rear end of the pressure nozzle 0512. The lower part of the roller fixing plate 054 is provided with a waste tray 052. Waste tape is collected on the active roller 057 on the waste tray 052. The back of the waste tray 052 is connected to the servo motor 0514 by a belt drive. The tape speed can be controlled by the servo motor 0514. The middle of the roller fixing plate 054 is provided with a pressure sensor 13 in the dual-shaft transmission roller assembly 0510. The pressure sensor 13 is electrically connected to the control system. When the pressure sensor 13 detects that the tape pressure is too high, it transmits an electrical signal to the emergency brake pad 059 and the servo motor 0514 stops working. The labeling mechanism 05 is used for labeling. During operation, the through-beam sensor 14 located on the right side of the labeling mechanism 05 transmits a signal to the servo motor 0511 at the lower end of the labeling mechanism 05, which monitors the distance between the front end of the paper bag and the pressure nozzle 0512. The servo motor 0511 rotates, causing the pressure nozzle 0512 to rotate and press its front end against the paper bag. The servo motor 0514 in the middle of the labeling mechanism 05 starts working, which in turn drives the active adhesive roller 057 to rotate, thereby driving the tape-type roll sticker 053 to rotate. Under the action of the pressure nozzle 0512, the sticker is peeled off from the tape to the sealing point of the paper bag. The tilting cylinder 047 drives the U-shaped fork 045 to retract, the servo motor 0511 at the lower end of the labeling mechanism 05 rotates, the pressure nozzle 0512 rotates to its original position, and the conveyor belt 013 moves.

[0040] For details, see Figure 1-2 and Figure 9The label rolling mechanism 07 consists of a roller 071, an electric cylinder 072, an angle steel frame 073, a wheel frame 074, and a rotary motor 075. The roller 071 is bolted to the wheel frame 074, and the rotary motor 075 is installed inside the wheel frame 074. Angle irons are mounted on both sides of the bottom of the electric cylinder 072 and fixed to the angle steel frame 073 by bolts; the other end is threaded into the wheel frame 074. The electric cylinder 072 at the top of the label rolling mechanism 07 pushes the wheel frame 074 until the roller 071 is in close contact with the label.

[0041] Example 2: A method for sealing paper bags using an automatic sealing device for square-bottom paper bags, comprising the following steps: S1. According to the specifications of the square bottom paper bag to be sealed, adjust the baffle 06 at the end of the set screw to make it close to the bottom of the paper bag, adjust the height of the limit roller 041 to make it close to the upper surface of the paper bag, and install the tape roll sticker 053 on the feeding tray 051. S2. Start the device. The paper bag moves on the conveyor belt 013 to the first photoelectric sensor 12. The conveyor belt 013 stops moving. The motor 028 drives the gear 023 to rotate. The gripper 021 rotates and closes, driving the horizontal clamping bar 022 to press into the side of the paper bag. S3. The top cylinder 029 of the bag clamping mechanism pushes the trapezoidal pressing plate 026 downward to press the upper surface of the paper bag. S4, the gripper 021 rotates and opens, the top cylinder 029 drives the trapezoidal pressing plate 026 to move up to the original position, and the conveyor belt 013 moves; S5. When the paper bag reaches the V-shaped groove of the curved auxiliary guide rail 08, the conveyor belt 013 stops moving, and the direct-acting cylinder 033 below the bag pressing mechanism 03 starts to work, driving the pointed horizontal wedge pressing rod 031 to press to the V-shaped groove, creating an indentation on the paper bag. S6, the direct-acting cylinder 033 drives the pointed transverse wedge pressure rod 031 to rise to its original position, and the conveyor belt 013 moves; S7. Under the action of the arc-shaped auxiliary guide rail 08, the upper curved part of the paper bag gradually becomes right-angled during the movement of the indentation. S8. When the paper bag reaches directly below the labeling mechanism 05, the conveyor belt 013 stops moving, and the two horizontal cylinders 046 push the inclined push plate 044 forward to hold the lower bent part of the paper bag. S9, tilting cylinder 047 pushes U-shaped fork 045 to flatten the upper curved part of the indentation; S10. The through-beam sensor 14 located on the right side of the labeling mechanism 05 transmits the signal of the distance between the front end of the paper bag and the pressure nozzle 0512 to the servo motor 0511 at the lower end of the labeling mechanism 05. The servo motor 0511 rotates, causing the pressure nozzle 0512 to rotate and press its front end against the paper bag. S11, The servo motor 0514 in the middle of the labeling mechanism 05 starts to work, which in turn drives the active glue roller 057 to rotate, thereby driving the tape roll sticker 053 to rotate. The sticker is peeled off from the tape to the paper bag seal under the action of the pressure nozzle 0512. S12, tilting cylinder 047 drives U-shaped fork 045 to retract, the servo motor 0511 at the lower end of labeling mechanism 05 rotates, the nozzle 0512 rotates to the original position, and the conveyor belt 013 moves. S13, The electric cylinder 072 above the rolling label mechanism 07 pushes the wheel frame 074 until the roller 071 is close to the sticker; S14, Rotary motor 075 drives roller 071 to rotate and crush the sticker; S15, Conveyor belt 013 transports the square-bottomed paper bags that are to be sealed away; S16. Repeat steps S2-S15 until all paper bags are sealed. S17. When the camera 11 installed on the L-shaped cantilever beam 9 observes that the sticker is not tightly attached, the information is fed back to the control system, and each mechanism stops working. S18, the middle of the dual-shaft drive roller group 0510 of the rubber roller fixing plate 054 is equipped with a pressure sensor 13. When the pressure sensor 13 detects that the pressure of the tape is too high, it transmits an electrical signal to the emergency brake pad 059. At the same time, the servo motor 0514 stops working and emits an alarm sound to prompt personnel to adjust the tape or replace the tape roll sticker 053.

Claims

1. An automatic sealing device for square-bottom paper bags, characterized in that, The system includes a frame plate (10), on which a transport mechanism (01) is fixedly mounted. A bag clamping mechanism (02) is mounted above the transport mechanism (01), and a bag pressing mechanism (03) is mounted on the front side of the transport mechanism (01). The bag pressing mechanism (03) includes a pointed transverse wedge pressing rod (031), which is located directly above the V-groove of the arc-shaped auxiliary guide rail (08). The pointed transverse wedge pressing rod (031) passes through... A cantilever beam (034) is mounted on a lifting slide rail (032). A direct-acting cylinder (033) is mounted on the lower end of the lifting slide rail (032). The direct-acting cylinder (033) is mounted on a U-shaped bracket (036) by bolt assembly and can realize the vertical lifting movement of the cantilever beam (034). Both ends of the cantilever beam (034) are mounted on the lifting slide rail (032) through sliding pairs (035) to prevent the cantilever beam (034) from tilting left or right. The labeling mechanism (05) is installed... The bag folding mechanism (04) is mounted above the label rolling mechanism (07), the label rolling mechanism (07) is mounted on the far right of the transport mechanism (01), the arc-shaped auxiliary guide rail (08) is mounted on the front side of the transport mechanism (01), the tail baffle (06) is mounted on the rear side of the transport mechanism (01), the camera (11) is mounted above the bag folding mechanism (04) via the L-shaped cantilever beam (9), the through-beam sensor (14) is mounted on the right side of the labeling mechanism (05), the labeling mechanism (05) is equipped with a pressure sensor (13), the photoelectric sensor (12) is mounted on the upper crossbeam (0412), and the conveyor belt (013) is adjusted to move intermittently. The control system identifies the image captured by the camera (11) and the tension of the tape transmitted by the pressure sensor (13), and controls the transport mechanism (01), the bag clamping mechanism (02), the bag pressing mechanism (03), the bag folding mechanism (04), the labeling mechanism (05), and the label rolling mechanism (07) to run according to the planned path and actions.

2. The automatic sealing device for square-bottom paper bags according to claim 1, characterized in that: The transport mechanism (01) includes a drive wheel (011), which is symmetrically distributed on the left and right and synchronously connected to the drive shaft (012) by a key. The drive shaft (012) is supported by a bearing (014) in a bearing housing (015). The bearing housing (015) and the bearing housing support base plate (017) are connected by a bolt assembly. The two drive shafts (012) are driven by a conveyor belt (013). The bottom of the guide rail support (016) is provided with threaded holes at the four corners. The guide rail support (016) is fixed to the frame plate (10) by bolts. The bottom of the frame plate (10) is provided with anti-slip ridges.

3. The automatic sealing device for square-bottom paper bags according to claim 2, characterized in that: The tail baffle (06) includes a vertical telescopic rod (061), a baffle connecting rod (062), a baffle support (063), and a baffle plate (064). The vertical telescopic rod (061) is welded onto the baffle plate (064). The vertical telescopic rod (061) is threaded and threadedly connected to the baffle connecting rod (062). The baffle connecting rod (062) is fixed to the baffle support (063) at equal intervals by set screws. The baffle support (063) is fixed to the top side of the transport mechanism (01).

4. The automatic sealing device for square-bottom paper bags according to claim 3, characterized in that: The bag clamping mechanism (02) includes a clamp (021). The left and right symmetrical clamps (021) are connected to the horizontal clamping rod (022) by high-strength bolts. The upper end of the clamp (021) is pinned to the gear fixing plate (025) by the gear (023). One end of the clamp connecting rod (024) is connected to the clamp (021) by bolts, and the other end is installed on the gear fixing plate (025). The gear fixing plate (025) is equipped with a pair of identical gears (023) which are connected to the main shaft of the motor (028) by key. The arc-shaped auxiliary guide rail (08) and the tail baffle (06) work together to prevent the paper bag from swinging back and forth during the bag clamping process. A trapezoidal pressure plate (026) is installed above the arc-shaped auxiliary guide rail (08). The trapezoidal pressure plate (026) is connected to the top cylinder (029) by threads. The top cylinder (029) is connected to the horizontal plate (027) by bolts.

5. The automatic sealing device for square-bottom paper bags according to claim 4, characterized in that: The bottom horizontal part of the arc-shaped auxiliary guide rail (08) is fixed to the front side of the guide rail by bolt assembly. The middle part of the arc-shaped auxiliary guide rail (08) is welded to multiple guardrail lifting handles (081) installed on the side of the guide rail support (016). The arc-shaped auxiliary guide rail (08) is stamped. The front end of the arc-shaped auxiliary guide rail (08) is provided with a V-shaped groove, which is conducive to the sharp horizontal wedge pressure bar (031) to make indentation on the paper bag. The angle of the upper curved part of the arc-shaped auxiliary guide rail (08) increases from 0 to right angle, so that the curved section at the front end of the paper bag gradually transitions from an acute angle to a right angle.

6. The automatic sealing device for square-bottom paper bags according to claim 5, characterized in that: The bag folding mechanism (04) includes a sleeve (042), the upper part of which is welded to a crossbeam (0412). The sleeve (042) has multiple pin holes, and the two are connected by pins and can be adjusted in height. The crossbeam (0412) is welded from square steel. The upper crossbeam (0412) is equipped with multiple sets of limiting rollers (041), which, together with the tail baffle (06) and the arc-shaped auxiliary guide rail (08), limit the paper bag. The bottom of the tripod (043) is bolted to the frame plate (10), and the bearing bracket (0410) is connected by bolts. The bolts are symmetrically installed on the tripod (043), the rolling bearing (049) is installed in the bearing bracket (0410), the two ends of the crossbar (0411) are installed in the inner hole of the rolling bearing (049), the two horizontal cylinders (046) are symmetrically distributed on the crossbar (0411), the front end of the push rod of the horizontal cylinder (046) is threadedly connected to the inclined push plate (044), the middle part of the inclined pressure rod (048) at the top of the tripod (043) is equipped with an inclined cylinder (047), and the front push rod of the inclined cylinder (047) is threadedly connected to the U-shaped fork (045).

7. The automatic sealing device for square-bottom paper bags according to claim 6, characterized in that: The labeling mechanism (05) includes a rubber roller fixing plate (054), which is fixed to an L-shaped cantilever beam (9) by bolt assembly. Connecting plates (0513) are welded on both sides. A camera (11) is connected to the L-shaped cantilever beam (9) by screws to observe the sealing of the paper bag. The feeding tray (051) is fixed on the upper part of the rubber roller fixing plate (054). The tape roll sticker (053) is sleeved on the passive rubber roller (058) on the feeding tray (051). A brake pad (059) is installed at the edge. The uppermost extension rod (056) is equipped with a tensioning rubber roller (055). The tension of the tape is adjusted by adjusting the tensioning rubber roller (055). The transmission rubber roller group (0510) is rotatably connected to the rubber roller fixing plate (054). The pressure plate (0515) is connected to the rubber roller fixing plate by bolts. At the bend, the lower right corner of the roller fixing plate (054) is provided with upper and lower pressure nozzles (0512) to peel the sticker off the tape; the servo motor (0511) is installed at the rear end of the pressure nozzle (0512), and the lower part of the roller fixing plate (054) is provided with a waste tray (052). Waste tape is collected on the active roller (057) on the waste tray (052). The back of the waste tray (052) is connected to the servo motor (0514) by belt drive. The speed of the tape can be controlled by the servo motor (0514). The middle part of the roller fixing plate (054) is provided with a pressure sensor (13) on the transmission roller group (0510). The pressure sensor (13) is electrically connected to the control system. When the pressure sensor (13) detects that the tape pressure is too high, it transmits an electrical signal to the emergency brake pad (059) and the servo motor (0514) stops working.

8. The automatic sealing device for square-bottom paper bags according to claim 7, characterized in that: The rolling mark mechanism (07) includes a roller (071), which is bolted to the wheel frame (074). A rotary motor (075) is installed inside the wheel frame (074). Angle irons are mounted on both sides of the bottom of the electric cylinder (072) and fixed to the angle steel frame (073) by bolts. The other end of the electric cylinder (072) is threaded into the wheel frame (074).

9. A method for automatically sealing square-bottom paper bags, characterized in that, The method is implemented using the automatic sealing device for square-bottom paper bags as described in claim 8, and includes the following steps: S1. According to the specifications of the square bottom paper bag to be sealed, adjust the tail baffle (06) by adjusting the set screw to make it close to the bottom of the paper bag, adjust the height of the limit roller (041) to make it close to the upper surface of the paper bag, and install the tape roll sticker (053) on the feeding tray (051). S2, Start the device, the paper bag moves on the conveyor belt (013) to the first photoelectric sensor (12), the conveyor belt (013) stops moving, the motor (028) drives the gear (023) to rotate, the gripper (021) rotates and closes, driving the horizontal gripper (022) to press into the side of the paper bag; S3. The top cylinder (029) of the bag clamping mechanism pushes the trapezoidal pressing plate (026) downward to press the upper surface of the paper bag; S4, the gripper (021) rotates and opens, the top cylinder (029) drives the trapezoidal pressure plate (026) to move up to the original position, and the conveyor belt (013) moves; S5. When the paper bag reaches the V-shaped groove of the curved auxiliary guide rail (08), the conveyor belt (013) stops moving, and the direct-acting cylinder (033) under the bag pressing mechanism (03) starts working, driving the pointed transverse wedge pressing rod (031) to press to the V-shaped groove, creating an indentation on the paper bag; S6, the direct-acting cylinder (033) drives the pointed transverse wedge pressure rod (031) to rise to its original position, and the conveyor belt (013) moves; S7. Under the action of the arc-shaped auxiliary guide rail (08), the upper curved part of the paper bag gradually becomes right-angled during the movement of the indentation; S8. When the paper bag reaches directly below the labeling mechanism (05), the conveyor belt (013) stops moving, and the two horizontal cylinders (046) push the inclined push plate (044) forward to hold the lower bent part of the paper bag. S9, the tilting cylinder (047) pushes the U-shaped fork (045) to flatten the upper curved part of the indentation; S10. The through-beam sensor (14) located on the right side of the labeling mechanism (05) transmits the signal of the distance between the front end of the paper bag and the pressure nozzle (0512) to the servo motor (0511) at the lower end of the labeling mechanism (05). The servo motor (0511) rotates, causing the pressure nozzle (0512) to rotate and press its front end against the paper bag. S11, The servo motor (0514) in the middle of the labeling mechanism (05) starts to work, which drives the active glue roller (057) to rotate, thereby driving the tape roll sticker (053) to rotate. The sticker is peeled off from the tape to the paper bag seal under the action of the nozzle (0512). S12, the tilting cylinder (047) drives the U-shaped fork (045) to retract, the servo motor (0511) at the lower end of the labeling mechanism (05) rotates, the nozzle (0512) rotates to its original position, and the conveyor belt (013) moves. S13, The electric cylinder (072) above the roller label mechanism (07) pushes the wheel frame (074) until the roller (071) is close to the sticker; S14. The rotary motor (075) drives the roller (071) to rotate and crush the sticker; S15, The conveyor belt (013) transports the square-bottomed paper bag that is to be sealed away; S16, Repeat S2 Continue with step S15 until all paper bags are sealed. S17. When the camera (11) installed on the L-shaped cantilever beam (9) observes that the sticker is not tightly attached, the information is fed back to the control system and each mechanism stops working. S18, The transmission roller group (0510) in the middle of the roller fixing plate (054) is equipped with a pressure sensor (13). When the pressure sensor (13) detects that the pressure of the tape is too high, it transmits an electrical signal to the emergency brake pad (059) and at the same time the servo motor (0514) stops working and emits an alarm sound to prompt the personnel to adjust the tape or replace the tape roll sticker (053).

Images