An automatic bag feeding method for a packaging machine

Abstract

This invention discloses an automatic bag feeding method for a packaging machine. The method comprises the following steps: S1, providing an automatic bag feeding machine; S2, placing a packaging bag on a replenishment station; S3, a bag feeding pusher extends from the longitudinal strip hole of the bag feeding machine and pushes the packaging bag from the replenishment station to the suction station and holds it there; S4, a lifting suction cup descends to suck up the packaging bag and moves it to the bag feeding station; S5, a support device operates to support the bottom of the packaging bag; S6, an opening mechanism operates to open the bag mouth; S7, the opening shaft deflects, and the opening hook hooks onto the bag mouth; S8, the edge of the bag mouth is clamped from the side; S9, the lifting suction cup releases the packaging bag and resets; S10, the rotating main shaft rotates, and the bag mouth faces upward to supply the bag clamping mechanism of the bag filling machine; S11, the opening shaft deflects in the opposite direction, and the opening hook disengages from the bag mouth; S12, the rotating main shaft rotates and resets. This method can accurately and automatically complete the suction, turning, and bag-packing of packaging bags, achieving automated bag feeding and improving production efficiency.

Description

Technical Field

[0001] This invention relates to the field of packaging equipment technology, and mainly to an automatic bag feeding method for a packaging machine. Background Technology

[0002] Packaging bags are a type of flexible transport packaging container with advantages such as moisture and dust protection. They can hold materials that are difficult to transport, thus facilitating loading, unloading, and handling.

[0003] To improve packaging efficiency, automated devices are needed. Patent No. 202320276692.7 discloses an automatic packaging machine, including: a frame; a bag feeding device installed on one side of the frame, suitable for placing rubber bags; a bag picking device vertically installed on the frame, located above the bag feeding device; suitable for adsorbing the rubber bag and transferring it to the feeding station with the bag opening facing upwards; a bag clamping device installed on the frame, aligned or approximately aligned with the rubber bag opening, and arranged along the central axis of the rubber bag opening; suitable for clamping and fixing the two apex corners of the rubber bag opening; and a bag opening device installed on the frame, aligned or approximately aligned with the rubber bag opening, located on both sides of the central axis of the rubber bag opening; suitable for opening the rubber bag opening. The packaging method using this automatic packaging machine has the following disadvantages: 1 1. When using packaging bags of different sizes for conveying, the position of the bag compartment cannot be changed, thus it cannot be well adapted to different packaging bags, resulting in poor bag feeding effect; 2. The baffle is driven by a linear module to move back and forth linearly along the groove, which requires a large linear module to ensure the range of movement, affecting the overall structural size and increasing the cost of use; 3. When picking up packaging bags, the suction cups are also fixedly installed, and the position of the suction cups cannot be adjusted to accurately pick up packaging bags of different sizes; 4. The bag picking device picks up the upper part of the packaging bag, but there is no effective support structure for the lower part of the packaging bag during the rising process, which affects the subsequent bag clamping; 5. The rotating clamps are fixed, and when it is necessary to clamp the packaging bag, the packaging bag needs to contact the second clamp on the rotating clamp when rising, which will cause uneven clamping and affect subsequent processing. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an automatic bag feeding method for a packaging machine, which can accurately and automatically pick up, turn over and put on the packaging bag, thereby improving production efficiency.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is: an automatic bag feeding method for a packaging machine, comprising the following steps:

[0006] S1. An automatic bag feeding machine is provided, comprising a frame, a bag support plate on the frame, a lateral limiting structure for laterally limiting the packaging bag on the bag support plate, and a longitudinal positioning structure for longitudinally positioning the packaging bag on the bag support plate. The lateral limiting structure and the longitudinal limiting structure form a placement area for placing the packaging bag. A feeding station and a suction station are provided in the placement area. A longitudinally movable bag feeding longitudinal slide is provided on the frame. A bag feeding push rod is lifted and lowered on the bag feeding longitudinal slide. At least two bag feeding longitudinal slots extending from the feeding station to the suction station are provided on the bag support plate. The bag feeding push rod passes through the bag support plate and is constrained within the bag feeding longitudinal slots. The bag feeding push rod is driven by a bag feeding longitudinal sliding drive device to reciprocate between the feeding station and the suction station. The bag feeding push rod is driven by a bag feeding lifting power device to lift and lower the bag feeding push rod above or below the support surface of the bag support plate.

[0007] The frame is also equipped with a bag feeding device, which includes a bag feeding lifting power support fixedly mounted on the frame. A bag feeding lifting power device is mounted on the bag feeding lifting power support. A bag feeding connecting plate is provided below the bag feeding lifting power support. The bag feeding connecting plate is driven to lift and lower by the bag feeding lifting power device. A bag feeding longitudinal power support is fixedly mounted below the bag feeding connecting plate. A bag feeding longitudinal power device is fixedly mounted on the bag feeding longitudinal power support. A bag feeding longitudinal sliding frame is slidably mounted on the bag feeding connecting plate. The bag feeding longitudinal sliding frame is driven to slide longitudinally between the suction station and the bag supply station by the bag feeding longitudinal power device. A bag feeding mounting frame is fixedly mounted below the bag feeding longitudinal sliding frame. Several lifting suction cups for suctioning packaging bags are mounted on the bag feeding mounting frame. The lifting suction cups are connected to the air extraction system. A support device for supporting the bottom of the packaging bag is also installed on the frame.

[0008] The frame is also equipped with a bag opening and flipping device located at the bag feeding station. The bag opening and flipping device includes a flipping main shaft rotatably mounted on the frame and located above the bag feeding station. A bag opening mounting seat is fixedly mounted in the middle of the flipping main shaft. A bag opening shaft is rotatably mounted on the bag opening mounting seat. Bag opening hooks are mounted at both ends of the bag opening shaft. The bag opening shaft is driven to rotate by a bag opening deflection adjustment device. A first swing clamping device and a second swing clamping device are also provided at both ends of the flipping main shaft to tighten and clamp the two ends of the packaging bag. The flipping main shaft is driven to rotate by a main deflection adjustment device. An opening mechanism for sucking up the lower part of the packaging bag mouth and opening it is installed on the frame below the bag opening hooks.

[0009] S2. Place the stacked packaging bags on the replenishment station of the bag support plate;

[0010] S3. The bag supply push rod is driven by the bag supply lifting power device to extend from the longitudinal strip hole of the bag supply and pushes the packaging bag on the replenishment station to the suction station and holds it through the longitudinal sliding drive device of the bag supply.

[0011] S4. The bag feeding lifting power device drives the lifting suction cup at the suction station to descend and suck up the first packaging bag on the upper layer, and then rises. Then the bag feeding longitudinal power device drives the bag feeding longitudinal sliding frame to move from the suction station to the bag supply station.

[0012] S5. The support device operates to support the bottom of the packaging bag located at the bag feeding station.

[0013] S6. The opening mechanism sucks up the bottom of the bag opening on the lifting suction cup and moves it downward to open the bag opening.

[0014] S7. The bag opening deflection adjustment device drives the bag opening shaft to deflect, so that the bag opening hook is hooked into the bag opening of the packaging bag.

[0015] S8. The first swing clamping device and the second swing clamping device clamp the edge of the bag opening from the side.

[0016] S9. The lifting suction cup releases the packaging bag and returns to its horizontal position after being horizontally reset.

[0017] S10. The main deflection adjustment device drives the rotating main shaft to rotate, causing the bag opening hook, the first swing clamping device and the second swing clamping device to clamp the packaging bag and deflect it by 90°. During the deflection of the rotating main shaft, the support device continuously supports the bottom of the packaging bag. Finally, the bag opening of the packaging bag is fed to the bag clamping mechanism of the bag filling machine with the bag opening facing upward, thus completing the bag feeding.

[0018] S11. The bag opening deflection adjustment device drives the bag opening shaft to deflect in the opposite direction, so that the bag opening hooks disengage from the bag opening. At the same time, the support device resets to avoid the space for the lifting suction cup to pick up the bag.

[0019] S12. After the first swing clamping device and the second swing clamping device release the packaging bag, the main deflection adjustment device drives the flipping spindle to rotate and reset.

[0020] S13. Repeat steps S4 to S12 to feed the packaging bags to the bag clamping mechanism of the bag filling machine one by one;

[0021] S14. During the process of supplying the last bag in a stack of packaging bags, a new stack of packaging bags is placed on the replenishment station of the bag support plate.

[0022] S15. The bag supply push rod is driven by the bag supply lifting power device to descend below the bag support plate. Then, the bag supply longitudinal sliding drive device moves the bag supply push rod from the suction station to the replenishment station. After the last packaging bag is picked up and lifted by the lifting suction cup, step S3 is repeated to complete the replenishment of the packaging bag.

[0023] As a preferred embodiment, the driving method of the bag supply longitudinal sliding drive device for driving the bag supply push rod is as follows: the first bag supply link and the second bag supply link are hinged to each other, the length of the first bag supply link is longer than the length of the second bag supply link, one end of which is hinged to the bag supply longitudinal slide, the first bag supply link is hinged to the frame, and the bag supply longitudinal sliding drive device is a bag supply linear power device, which is hinged to the middle of the frame and the first bag supply link. The linear motion of the bag supply linear power device drives the first bag supply link to swing, thereby causing the second bag supply link to swing and drive the bag supply longitudinal slide to slide.

[0024] As a preferred embodiment, the position of the lifting suction cup is adjustable in both the horizontal and vertical directions.

[0025] As a preferred embodiment, the longitudinal sliding frame is provided with a suction bag limiting structure that limits the descent position of the lifting suction cup. When the lifting suction cup is driven to descend, the lifting suction cup first contacts the upper surface of the top packaging bag, then a vacuum is drawn, and the lifting suction cup continues to descend and squeeze the top packaging bag. When the suction bag limiting structure contacts the upper surface of the top packaging bag, the squeezing force between the lifting suction cup and the top packaging bag reaches the maximum allowable value.

[0026] As a preferred embodiment, in step S8, the first swing clamping device and the second swing clamping device first swing towards the edge of the bag opening from the side and then swing outward to stretch and tighten the bag horizontally.

[0027] As a preferred embodiment, when the first and second swing clamping devices swing outward, their extreme positions are limited by the bag-limiting top block.

[0028] After adopting the above technical solution, the effect of the present invention is that the automatic bag feeding method of the packaging machine includes the following steps:

[0029] S1. An automatic bag feeding machine is provided, comprising a frame, a bag support plate on the frame, a lateral limiting structure for laterally limiting the packaging bag on the bag support plate, and a longitudinal positioning structure for longitudinally positioning the packaging bag on the bag support plate. The lateral limiting structure and the longitudinal limiting structure form a placement area for placing the packaging bag. A feeding station and a suction station are provided in the placement area. A longitudinally movable bag feeding longitudinal slide is provided on the frame. A bag feeding push rod is lifted and lowered on the bag feeding longitudinal slide. At least two bag feeding longitudinal slots extending from the feeding station to the suction station are provided on the bag support plate. The bag feeding push rod passes through the bag support plate and is constrained within the bag feeding longitudinal slots. The bag feeding push rod is driven by a bag feeding longitudinal sliding drive device to reciprocate between the feeding station and the suction station. The bag feeding push rod is driven by a bag feeding lifting power device to lift and lower the bag feeding push rod above or below the support surface of the bag support plate.

[0030] The frame is also equipped with a bag feeding device, which includes a bag feeding lifting power support fixedly mounted on the frame. A bag feeding lifting power device is mounted on the bag feeding lifting power support. A bag feeding connecting plate is provided below the bag feeding lifting power support. The bag feeding connecting plate is driven to lift and lower by the bag feeding lifting power device. A bag feeding longitudinal power support is fixedly mounted below the bag feeding connecting plate. A bag feeding longitudinal power device is fixedly mounted on the bag feeding longitudinal power support. A bag feeding longitudinal sliding frame is slidably mounted on the bag feeding connecting plate. The bag feeding longitudinal sliding frame is driven to slide longitudinally between the suction station and the bag supply station by the bag feeding longitudinal power device. A bag feeding mounting frame is fixedly mounted below the bag feeding longitudinal sliding frame. Several lifting suction cups for suctioning packaging bags are mounted on the bag feeding mounting frame. The lifting suction cups are connected to the air extraction system. A support device for supporting the bottom of the packaging bag is also installed on the frame.

[0031] The frame is also equipped with a bag opening and flipping device located at the bag feeding station. The bag opening and flipping device includes a flipping main shaft rotatably mounted on the frame and located above the bag feeding station. A bag opening mounting seat is fixedly mounted in the middle of the flipping main shaft. A bag opening shaft is rotatably mounted on the bag opening mounting seat. Bag opening hooks are mounted at both ends of the bag opening shaft. The bag opening shaft is driven to rotate by a bag opening deflection adjustment device. A first swing clamping device and a second swing clamping device are also provided at both ends of the flipping main shaft to tighten and clamp the two ends of the packaging bag. The flipping main shaft is driven to rotate by a main deflection adjustment device. An opening mechanism for sucking up the lower part of the packaging bag mouth and opening it is installed on the frame below the bag opening hooks.

[0032] S2. Place the stacked packaging bags on the replenishment station of the bag support plate;

[0033] S3. The bag supply push rod is driven by the bag supply lifting power device to extend from the longitudinal strip hole of the bag supply and pushes the packaging bag on the replenishment station to the suction station and holds it through the longitudinal sliding drive device of the bag supply.

[0034] S4. The bag feeding lifting power device drives the lifting suction cup at the suction station to descend and suck up the first packaging bag on the upper layer, and then rises. Then the bag feeding longitudinal power device drives the bag feeding longitudinal sliding frame to move from the suction station to the bag supply station.

[0035] S5. The support device operates to support the bottom of the packaging bag located at the bag feeding station.

[0036] S6. The opening mechanism sucks up the bottom of the bag opening on the lifting suction cup and moves it downward to open the bag opening.

[0037] S7. The bag opening deflection adjustment device drives the bag opening shaft to deflect, so that the bag opening hook is hooked into the bag opening of the packaging bag.

[0038] S8. The first swing clamping device and the second swing clamping device clamp the edge of the bag opening from the side.

[0039] S9. The lifting suction cup releases the packaging bag and returns to its horizontal position after being horizontally reset.

[0040] S10. The main deflection adjustment device drives the rotating main shaft to rotate, causing the bag opening hook, the first swing clamping device and the second swing clamping device to clamp the packaging bag and deflect it by 90°. During the deflection of the rotating main shaft, the support device continuously supports the bottom of the packaging bag. Finally, the bag opening of the packaging bag is fed to the bag clamping mechanism of the bag filling machine with the bag opening facing upward, thus completing the bag feeding.

[0041] S11. The bag opening deflection adjustment device drives the bag opening shaft to deflect in the opposite direction, so that the bag opening hooks disengage from the bag opening. At the same time, the support device resets to avoid the space for the lifting suction cup to pick up the bag.

[0042] S12. After the first swing clamping device and the second swing clamping device release the packaging bag, the main deflection adjustment device drives the flipping spindle to rotate and reset.

[0043] S13. Repeat steps S4 to S12 to feed the packaging bags to the bag clamping mechanism of the bag filling machine one by one;

[0044] S14. During the process of supplying the last bag in a stack of packaging bags, a new stack of packaging bags is placed on the replenishment station of the bag support plate.

[0045] S15. The bag supply push rod is driven by the bag supply lifting power device to descend below the bag support plate. Then, the bag supply longitudinal sliding drive device moves the bag supply push rod from the suction station to the replenishment station. After the last packaging bag is lifted by the lifting suction cup, step S3 is repeated to complete the replenishment of the packaging bag. This method effectively stacks the packaging bags on the replenishment station. The push rod can effectively push the packaging bags to the suction station. Then, the lifting suction cup on the suction station can lift and suck up the packaging bags in sequence through the bag feeding lifting power device. Then, the bag feeding longitudinal power device drives the bag feeding longitudinal sliding frame to move the sucked packaging bags to the bag supply station. At the same time, the support device supports them. Then, the opening mechanism on the bag supply station opens the bag mouth, which makes it convenient for the bag opening hook to swing and extend into the bag mouth. The first swing clamping device and the second swing clamping device clamp the two sides of the packaging bag, which can make the packaging bag form a stable opening with three fixed points, which is convenient for the subsequent supply to the bag clamping mechanism of the bag filling machine. It can continuously feed bags repeatedly with high efficiency.

[0046] Furthermore, the driving method of the bag supply longitudinal sliding drive device for driving the bag supply push rod is as follows: the first bag supply link and the second bag supply link are hinged together, the length of the first bag supply link is longer than the length of the second bag supply link, one end of which is hinged to the bag supply longitudinal slide, the first bag supply link is hinged to the frame, and the bag supply longitudinal sliding drive device is a bag supply linear power device, which is hinged to the middle of the frame and the first bag supply link. The linear motion of the bag supply linear power device drives the first bag supply link to swing, which in turn causes the second bag supply link to swing and drive the bag supply longitudinal slide to slide. The swing of the first bag supply link can drive the swing of the second bag supply link, and the cooperation of the first and second bag supply links can amplify the swing distance of the bag supply linear power device driving the first bag supply link. In this way, the bag supply linear power device does not need to move a long distance in a straight line to meet the required movement distance of the bag supply longitudinal slide, thus improving efficiency.

[0047] Furthermore, since the position of the lifting suction cup is adjustable in both the horizontal and vertical directions, it can be adjusted to suit packaging bags of different sizes, enabling accurate suction of the packaging bags and improving the firmness and accuracy of the suction.

[0048] Furthermore, since the longitudinal sliding frame is equipped with a suction bag limiting structure that limits the descent position of the lifting suction cup, when the lifting suction cup is driven to descend, the lifting suction cup first contacts the upper surface of the top packaging bag, then draws a vacuum, and the lifting suction cup continues to descend and squeeze the top packaging bag. When the suction bag limiting structure contacts the upper surface of the top packaging bag, the squeezing force between the lifting suction cup and the top packaging bag reaches the maximum allowable value. This effectively ensures that the lifting suction cup can accurately and effectively pick up a packaging bag each time it picks up a bag, guaranteeing the accuracy of the pick-up.

[0049] Furthermore, in step S8, the first swing clamping device and the second swing clamping device first swing towards the edge of the bag opening from the side and then swing outward to stretch the bag horizontally. In this way, the bag opening can be formed into a taut opening through the first swing clamping device, the second swing clamping device and the bag opening hook, which further ensures the accuracy of the opening and facilitates subsequent bag supply.

[0050] Furthermore, since the first and second swing clamping devices are limited to their extreme positions by the bag clamping limit block when they swing outward, excessive swing of the first and second swing clamping devices can prevent the packaging bag from deforming or tearing, thus affecting the quality of bag supply. Attached Figure Description

[0051] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0052] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0053] Figure 2 This is a top view of the bag feeding device according to an embodiment of the present invention;

[0054] Figure 3 This is a front view of the bag feeding device according to an embodiment of the present invention;

[0055] Figure 4 yes Figure 3 View from direction A;

[0056] Figure 5 This is a front view of the bag feeding device according to an embodiment of the present invention;

[0057] Figure 6 This is a left view of the bag feeding device according to an embodiment of the present invention;

[0058] Figure 7 yes Figure 6 View from direction B;

[0059] Figure 8 This is a schematic diagram of the support device according to an embodiment of the present invention;

[0060] Figure 9 This is a front view of the bag-opening and flipping device according to an embodiment of the present invention;

[0061] Figure 10 This is a schematic diagram of the structure of the bag-opening and flipping device according to an embodiment of the present invention;

[0062] Figure 11 This is a left view of the bag-opening and flipping device according to an embodiment of the present invention;

[0063] Figure 12 yes Figure 9 A magnified view of a portion at point C;

[0064] In the attached diagram: 101, frame; 102, bag support plate; 103, bag feeding longitudinal slide; 104, bag feeding push rod; 105, feeding station; 106, suction station; 107, bag feeding longitudinal slide rail; 108, bag feeding slide plate; 109, bag feeding sliding roller; 110, bag feeding longitudinal slot; 111, bag feeding longitudinal adjusting groove; 112, bag feeding push rod adjusting screw; 113, bag feeding first connecting rod; 11 4. Second connecting rod for bag supply; 115. Straight cylinder for bag supply; 116. Fixed transverse baffle; 117. Movable transverse baffle; 118. Transverse limiting strip groove; 119. Bag supply lifting cylinder; 120. First sliding positioning plate; 121. Second sliding positioning plate; 122. First adjusting groove; 123. Second adjusting groove; 124. Bag supply push plate; 125. Bag supply connecting plate; 126. Movable notch;

[0065] 201. Support arm; 202. Bag feeding lifting power support seat; 203. Bag feeding lifting guide rod; 204. Bag feeding lifting rotating roller; 205. Bag feeding lifting cylinder; 206. Bag feeding connecting plate; 207. Bag feeding longitudinal power support seat; 208. Bag feeding longitudinal guide rod; 209. Bag feeding fixing bushing; 210. Bag feeding fixing frame; 211. Bag feeding longitudinal cylinder; 212. Bag feeding synchronizing rod; 213. Bag feeding first mounting frame; 214. Bag feeding transverse connecting rod 215. Longitudinal connecting rod for bag feeding; 216. Transverse strip groove for bag feeding; 217. Longitudinal strip groove for bag feeding; 218. Second mounting bracket for bag feeding; 219. Strip groove for bag feeding opening; 220. Bag feeding screw; 221. Lifting suction cup; 222. Suction bag limiting block; 223. Support swing arm; 224. Support plate; 225. Support sway connecting block; 226. Support linear cylinder; 227. Air extraction system; 228. Air blowing system; 229. Bag feeding station;

[0066] 301. Tilting spindle; 302. Bag opening mounting base; 303. Bag opening shaft; 304. Bag opening hook; 305. Bag opening swing linkage; 306. Bag opening linear cylinder; 307. First clamping mounting base; 308. First clamping linkage; 309. Second clamping mounting base; 310. Second clamping linkage; 311. First bag clamping claw; 312. Second bag clamping claw; 313. First bag clamping linear cylinder; 314. First cylinder hinge plate; 315. Second cylinder hinge plate; 316. Second bag clamping linear cylinder; 317. First upper claw; 318. First lower claw; 319. Bag clamping synchronization linkage; 320. Bag clamping extension linkage; 321. First bag clamping opening and closing cylinder; 322. Second bag-clamping opening and closing cylinder; 323. Second upper claw; 324. Second lower claw; 325. Main bag-opening swing linkage; 326. Bag-opening support seat; 327. Main bag-opening linear cylinder; 328. Bag-clamping fixing rod; 329. Bag-clamping limiting top block; 330. Bag-clamping protrusion; 331. Bag-opening hook claw linkage; 332. Bag-opening strip-shaped through hole; 333. Bag-clamping sliding strip-shaped hole; 334. Bag-opening adjusting screw; 335. Opening lifting frame; 336. Opening auxiliary suction plate; 337. Opening suction cup; 338. Exposed hole; 339. Opening lifting cylinder; 340. Opening fixing seat; 341. Ventilation rod; 342. Guide spring; 343. Spring guide rod. Detailed Implementation

[0067] The present invention will be further described in detail below through specific embodiments.

[0068] like Figures 1 to 12 As shown in the figure, an embodiment of the present invention discloses an automatic bag feeding method for a packaging machine, comprising the following steps:

[0069] S1. An automatic bag feeding machine is provided, comprising a frame 101, a bag support plate 102 disposed on the frame 101, a lateral limiting structure for laterally limiting the packaging bag on the bag support plate 102, and a longitudinal positioning structure for longitudinally positioning the packaging bag on the bag support plate 102. The lateral limiting structure and the longitudinal limiting structure form a placement area for placing the packaging bag, a feeding station 105 and a suction station 106 are disposed on the placement area, and a longitudinally movable bag feeding longitudinal slide 103 is disposed on the frame 101. A bag supply push rod 104 is installed on the upper lifting mechanism. The bag support plate 102 is provided with at least two longitudinal strip holes 110 for bag supply extending from the feeding station 105 to the suction station 106. The bag supply push rod 104 passes through the bag support plate 102 and is constrained within the longitudinal strip holes 110. The bag supply push rod 104 drives the bag supply longitudinal slide block 103 to reciprocate between the feeding station 105 and the suction station 106 through a bag supply longitudinal sliding drive device. The bag supply push rod 104 is driven to rise and fall by a bag supply lifting power device so that the bag supply push rod 104 is higher or lower than the support surface of the bag support plate 102.

[0070] A bag feeding device is also installed on the frame 101. The bag feeding device includes a bag feeding lifting power support 202 fixedly installed on the frame 101. A bag feeding lifting power device is installed on the bag feeding lifting power support 202. A bag feeding connecting plate 206 is provided below the bag feeding lifting power support 202. The bag feeding connecting plate 206 is driven to lift by the bag feeding lifting power device. A bag feeding longitudinal power support 207 is fixedly installed below the bag feeding connecting plate 206. A bag feeding longitudinal power support 207 is fixed on the bag feeding... A bag-feeding longitudinal power device is installed, and a bag-feeding longitudinal sliding frame is slidably installed on the bag-feeding connecting plate 206. The bag-feeding longitudinal sliding frame is driven by the bag-feeding longitudinal power device to slide longitudinally between the suction station 106 and the bag supply station 229. A bag-feeding mounting frame is fixedly installed below the bag-feeding longitudinal sliding frame. Several lifting suction cups 221 for suctioning packaging bags are installed on the bag-feeding mounting frame. The lifting suction cups 221 are connected to the air extraction system 227. A support device for supporting the bottom of the packaging bag is also installed on the frame 101.

[0071] The frame 101 is also equipped with a bag opening and flipping device located at the bag feeding station 229. The bag opening and flipping device includes a flipping main shaft 301 rotatably mounted on the frame 101 and located above the bag feeding station 229. A bag opening mounting seat 302 is fixedly mounted in the middle of the flipping main shaft 301. A bag opening shaft 303 is rotatably mounted on the bag opening mounting seat 302. A bag opening hook 304 is mounted at both ends of the bag opening shaft 303. The bag opening shaft 303 is driven to rotate by a bag opening deflection adjustment device. The flipping main shaft 301 is also equipped with a first swing clamping device and a second swing clamping device at both ends to tighten and clamp the two ends of the packaging bag. The flipping main shaft 301 is driven to rotate by a main deflection adjustment device. An opening mechanism for sucking up the lower part of the packaging bag opening and opening it is installed on the frame 101 below the bag opening hook 304.

[0072] S2. Place the stacked packaging bags on the replenishment station 105 of the bag support plate 102;

[0073] S3. The bag supply push rod 104 is driven by the bag supply lifting power device to extend from the bag supply longitudinal strip hole 110 and pushes the packaging bag on the replenishment station 105 to the suction station 106 and holds it through the bag supply longitudinal sliding drive device.

[0074] S4. The bag feeding lifting power device drives the lifting suction cup 221 at the suction station 106 to descend and suck up the first packaging bag on the upper layer, and then rises. Then the bag feeding longitudinal power device drives the bag feeding longitudinal sliding frame to move from the suction station 106 to the bag supply station 229.

[0075] S5, The support device operates to support the bottom of the packaging bag at the bag feeding station 229;

[0076] S6. The opening mechanism sucks up the bottom of the bag opening on the lifting suction cup 221 and moves it downward to open the bag opening.

[0077] S7. The bag opening deflection adjustment device drives the bag opening shaft 303 to deflect, so that the bag opening hook 304 hooks into the bag opening of the packaging bag.

[0078] S8. The first swing clamping device and the second swing clamping device clamp the edge of the bag opening from the side.

[0079] S9, Lifting suction cup 221 releases the packaging bag and returns to its horizontal position;

[0080] S10. The main deflection adjustment device drives the rotating main shaft 301 to rotate, causing the bag opening hook 304, the first swing clamping device and the second swing clamping device to clamp the packaging bag and deflect it by 90°. During the deflection of the rotating main shaft 301, the support device continuously supports the bottom of the packaging bag. Finally, the bag opening of the packaging bag is fed to the bag clamping mechanism of the bag filling machine with the bag opening facing upward, thus completing the bag feeding.

[0081] S11. The bag opening deflection adjustment device drives the bag opening shaft 303 to deflect in the opposite direction, so that the bag opening hook 304 disengages from the bag opening of the packaging bag. At the same time, the support device resets to make room for the lifting suction cup 221 to pick up the packaging bag.

[0082] S12. After the first swing clamping device and the second swing clamping device release the packaging bag, the main deflection adjustment device drives the flipping main shaft 301 to rotate and reset.

[0083] S13. Repeat steps S4 to S12 to feed the packaging bags to the bag clamping mechanism of the bag filling machine one by one;

[0084] S14. During the process of supplying the last packaging bag in a stack of packaging bags, a new stack of packaging bags is placed on the replenishment station 105 of the bag support plate 102.

[0085] S15. The bag supply push rod 104 is driven by the bag supply lifting power device to descend below the bag support plate 102. Then, the bag supply longitudinal sliding drive device moves the bag supply push rod 104 from the suction station 106 to the replenishment station 105. After the last packaging bag is picked up and lifted by the lifting suction cup 221, step S3 is repeated to complete the replenishment of the packaging bags. This method effectively stacks the packaging bags on the replenishment station 105, and the push rod can effectively push the packaging bags to the suction station 106. Then, the lifting suction cup 221 on the suction station 106 lifts the bag by feeding the bag. The lifting power device can sequentially lift and suck up the packaging bags, and then the longitudinal power device for feeding bags drives the longitudinal sliding frame to move the sucked packaging bags to the bag feeding station 229. At the same time, the support device supports the bags, and then the opening mechanism on the bag feeding station 229 cooperates to open the bag mouth, so that the bag opening hook 304 can swing and extend into the bag mouth. Then, the first swing clamping device and the second swing clamping device clamp the two sides of the packaging bag, so that the packaging bag can form a stable opening with three fixed points, which facilitates the subsequent supply to the bag clamping mechanism of the bag filling machine, and can continuously feed bags repeatedly with high efficiency.

[0086] Preferably, the driving method of the bag supply longitudinal sliding drive device driving the bag supply push rod 104 is as follows: the bag supply first link 113 and the bag supply second link 114 are hinged to each other, the length of the bag supply first link 113 is longer than the length of the bag supply second link 114, one end of which is hinged to the bag supply longitudinal slide 103, the bag supply first link 113 is hinged to the frame 101, and the bag supply longitudinal sliding drive device is a bag supply linear power device, which is hinged to the middle of the frame 101 and the bag supply first link 113, and uses the bag supply linear power device to move linearly. The first bag supply link 113 is driven to swing, which in turn causes the second bag supply link 114 to swing, thereby driving the longitudinal slide block 103 of the bag supply to slide. The swing of the first bag supply link 113 driven by the linear power device can drive the swing of the second bag supply link 114. Furthermore, the cooperation between the first bag supply link 113 and the second bag supply link 114 can amplify the swing distance of the first bag supply link 113 driven by the linear power device. In this way, the linear power device does not need to move a long distance in a straight line to meet the required movement distance of the longitudinal slide block 103 of the bag supply, thereby improving efficiency and effectively reducing costs.

[0087] Preferably, the position of the lifting suction cup 221 is adjustable in both the horizontal and vertical directions; this allows the position of the lifting suction cup 221 to be adjusted to accommodate packaging bags of different sizes, enabling accurate suction of the packaging bags and improving the firmness and accuracy of the suction.

[0088] Preferably, the longitudinal sliding frame is provided with a suction bag limiting structure to limit the descent position of the lifting suction cup 221. When the lifting suction cup 221 is driven to descend, it first contacts the upper surface of the top packaging bag, then draws a vacuum and continues to descend, squeezing the top packaging bag. When the suction bag limiting structure contacts the upper surface of the top packaging bag, the squeezing force between the lifting suction cup 221 and the top packaging bag reaches the maximum allowable value. This effectively ensures that the lifting suction cup 221 can accurately and effectively pick up a packaging bag each time it performs suction, thus ensuring the accuracy of suction.

[0089] Preferably, in step S8, the first swing clamping device and the second swing clamping device first swing towards the edge of the bag opening from the side and then swing outward to stretch and tighten the bag horizontally; in this way, the bag opening can be formed into a taut opening by the first swing clamping device, the second swing clamping device and the bag opening hook 304, further ensuring the accuracy of the opening and facilitating subsequent bag supply.

[0090] Preferably, when the first and second swing clamping devices swing outward, the bag-limiting top block 329 restricts their extreme positions; this prevents excessive swinging of the first and second swing clamping devices from causing deformation or tearing of the packaging bag, thus affecting the quality of the bag supply.

[0091] In addition, embodiments of the present invention also disclose an automatic bag feeding machine for a packaging machine, such as... Figures 1 to 12 As shown, an automatic bag feeding machine for a packaging machine includes a frame 101. A bag support plate 102 is provided on the frame 101. The bag support plate 102 has a lateral limiting structure for lateral limiting of the packaging bag and a longitudinal positioning structure for longitudinal positioning of the packaging bag. The lateral limiting structure and the longitudinal limiting structure form a placement area for placing the packaging bag. A feeding station 105 and a suction station 106 are provided in the placement area. A longitudinally movable bag feeding longitudinal slide 103 is provided on the frame 101. The bag feeding longitudinal slide 103 rises... A bag supply push rod 104 is installed. The bag support plate 102 is provided with at least two longitudinal strip holes 110 for supplying bags, extending from the feeding station 105 to the suction station 106. The bag supply push rod 104 passes through the bag support plate 102 and is constrained within the longitudinal strip holes 110. The bag supply push rod 104 drives the bag supply longitudinal slide block 103 to reciprocate between the feeding station 105 and the suction station 106 through a bag supply longitudinal sliding drive device. The bag supply push rod 104 is driven to rise and fall by a bag supply lifting power device so that the bag supply push rod 104 is higher or lower than the support surface of the bag support plate 102.

[0092] A bag feeding device is also installed on the frame 101. The bag feeding device includes a bag feeding lifting power support 202 fixedly installed on the frame 101. A bag feeding lifting power device is installed on the bag feeding lifting power support 202. A bag feeding connecting plate 206 is provided below the bag feeding lifting power support 202. The bag feeding connecting plate 206 is driven to lift by the bag feeding lifting power device. A bag feeding longitudinal power support 207 is fixedly installed below the bag feeding connecting plate 206. A bag feeding longitudinal power support 207 is fixed on the bag feeding... A bag-feeding longitudinal power device is installed, and a bag-feeding longitudinal sliding frame is slidably installed on the bag-feeding connecting plate 206. The bag-feeding longitudinal sliding frame is driven by the bag-feeding longitudinal power device to slide longitudinally between the suction station 106 and the bag supply station 229. A bag-feeding mounting frame is fixedly installed below the bag-feeding longitudinal sliding frame. Several lifting suction cups 221 for suctioning packaging bags are installed on the bag-feeding mounting frame. The lifting suction cups 221 are connected to the air extraction system 227. A support device for supporting the bottom of the packaging bag is also installed on the frame 101.

[0093] The frame 101 is also equipped with a bag opening and flipping device located at the bag feeding station 229. The bag opening and flipping device includes a flipping main shaft 301 rotatably mounted on the frame 101 and located above the bag feeding station 229. A bag opening mounting seat 302 is fixedly mounted in the middle of the flipping main shaft 301. A bag opening shaft 303 is rotatably mounted on the bag opening mounting seat 302. A bag opening hook 304 is mounted at both ends of the bag opening shaft 303. The bag opening shaft 303 is driven to rotate by a bag opening deflection adjustment device. The flipping main shaft 301 is also equipped with a first swing clamping device and a second swing clamping device at both ends to tighten and clamp the two ends of the packaging bag. The flipping main shaft 301 is driven to rotate by a main deflection adjustment device. An opening mechanism for sucking up the lower part of the bag opening and opening it is installed on the frame 101 below the bag opening hook 304.

[0094] like Figure 2 As shown, two longitudinal bag-feeding slide rails 107 are mounted on the frame 101. A longitudinal bag-feeding slide block 103 is slidably mounted on the longitudinal bag-feeding slide rails 107. A bag-feeding slide plate 108 is fixedly mounted on the longitudinal bag-feeding slide block 103. A first longitudinal bag-feeding adjustment structure is provided between the bag-feeding slide plate 108 and the longitudinal bag-feeding slide block 103. A bag-feeding push rod 104 is flexibly mounted on the bag-feeding slide plate 108. Two longitudinal bag-feeding slide rails 107 are mounted on the frame 101. A bag-feeding sliding roller 109 that cooperates with the longitudinal bag-feeding slide rails 107 is provided on the longitudinal bag-feeding slide block 103. Two bag-feeding sliding rollers 109 are slidably mounted on the upper and lower sections of each longitudinal bag-feeding slide rail 107. Both bag-feeding sliding rollers 109 are rotatably mounted on the longitudinal bag-feeding slide block 103. On both sides, there are corresponding bag supply sliding rollers 109. When the bag supply longitudinal slide 103 slides, it can effectively slide on the bag supply longitudinal slide rail 107 through the bag supply sliding rollers 109. The bag support plate 102 is provided with two bag supply longitudinal slots 110 to facilitate the longitudinal sliding of the packaging bag. There is a bag supply push rod 104 in each of the two bag supply push rods 104 slots. The bag supply push rods 104 slide up and down in the bag supply longitudinal slots 110. At the same time, the position between the bag supply slide plate 108 and the bag supply longitudinal slide 103 can be adjusted longitudinally through the first bag supply longitudinal adjustment structure. This allows the bag supply push rods 104 on the bag supply slide plate 108 to be adjusted longitudinally, so that the bag supply push rods 104 can accurately fit the packaging bag to be pushed, thus ensuring accurate bag supply.

[0095] Furthermore, the first longitudinal adjustment structure for bag supply includes a longitudinal adjustment groove 111 for bag supply on the bag supply slide plate 108. The bag supply slide plate 108 and the longitudinal slide block 103 are connected by a bag supply push rod adjusting screw 112, which passes through the longitudinal adjustment groove 111. The bag supply push rod 104 is first fixedly installed on the bag supply slide plate 108. Two longitudinal adjustment grooves 111 for bag supply are provided at both ends of the bag supply push rod 104. The longitudinal adjustment grooves 111 on one bag supply push rod 104 form a straight line, and the two longitudinal adjustment grooves 111 for bag supply correspond to a longitudinal strip hole 110 for bag supply on the bag support plate 102. The other bag supply... Similarly, the push rod 104 is equipped with a supply push rod adjusting screw 112 on the corresponding bag supply longitudinal adjustment channel 111. The supply push rod adjusting screw 112 is threaded onto the bag supply longitudinal slide 103. In this way, by pressing the supply slide plate 108 with the supply push rod adjusting screw 112, the supply slide plate 108 can be fixed to the supply longitudinal slide 103. By loosening the supply push rod adjusting screw 112, the supply slide plate 108 can slide along the supply longitudinal adjustment channel 111. Then, by tightening the supply push rod adjusting screw 112, the supply slide plate 108 can be pressed and fixed. In this way, by adjusting the longitudinal position of the supply push rod 104, it can adapt to packaging bags of different sizes, ensuring accurate bag supply. The structure is simple, effective, and easy to use.

[0096] like Figure 4The bag feeding longitudinal sliding drive device includes a bag feeding linear power unit, a bag feeding first link 113, and a bag feeding second link 114. One end of the bag feeding first link 113 is hinged to the frame 101, and one end of the bag feeding second link 114 is hinged to the bag feeding longitudinal slide 103. The other ends of the bag feeding first link 113 and the other ends of the bag feeding second link 114 are hinged together. The bag feeding linear power unit is hinged to the frame 101 and the bag feeding first link. The middle part of 113 drives the first bag-feeding link 113 to swing; the bag-feeding linear power device includes a bag-feeding linear cylinder 115, the base of which is hinged to the frame 101, and the guide rod of which is hinged to the rod body of the first bag-feeding link 113; the first bag-feeding link 113 is hinged to one side of the frame 101 and swings around the hinge point, while the second bag-feeding link 114 is hinged to the first bag-feeding link 113, and the second bag-feeding link 114 then... The bag supply longitudinal slide 103 is hinged to the bag supply longitudinal slide block 103, which can only move longitudinally in a straight line. When the first bag supply link 113 swings, it drives the second bag supply link 114 to move, thus allowing the second bag supply link 114 to push the bag supply longitudinal slide block 103 to slide along the bag supply longitudinal guide rail. The bag supply linear cylinder 115 is hinged to one end of the frame 101. When the guide rod extends, it pushes the first bag supply link 113, causing the first bag supply link 113 to swing. Therefore, the guide rod that is pushed will also swing along with the bag supply linear cylinder 115, which effectively improves flexibility. When the first bag supply link 113 drives the second bag supply link 114 to slide longitudinally, it can effectively amplify the extension distance of the guide rod of the bag supply linear cylinder 115. In this way, a cylinder with a large stroke can meet the reciprocating movement between the feeding station 105 and the suction station 106. It amplifies the extension and retraction effect of the bag supply linear cylinder 115, reduces the volume of the bag supply linear cylinder 115, and reduces costs.

[0097] In this embodiment, the lateral limiting structure includes a fixed lateral baffle 116 fixed on the bag support plate 102 and a laterally movable lateral baffle 117. The movable lateral baffle 117 is installed on the bag support plate 102 through a lateral adjustment structure, which is the same as the first longitudinal adjustment structure for bag feeding. The fixed lateral baffle 116 limits one side of the packaging bag. The bag support plate 102 is provided with a lateral limiting strip groove 118 to facilitate the sliding of the movable lateral baffle 117. There are three lateral limiting strip grooves 118, which are evenly spaced on the bag support plate 102. The movable lateral baffle 117 is provided with a threaded hole. A lateral adjustment screw is provided below the bag support plate 102. In this way, the movable lateral baffle 117 can be fixed by tightening the lateral adjustment screw, and the movable lateral baffle 117 can be adjusted by loosening the lateral adjustment screw so that it can laterally limit the packaging bag. Adjusting the position of the movable lateral baffle 117 helps to limit packaging bags of different sizes, while ensuring that the packaging bag can move accurately and neatly when the bag feeding push rod 104 is pushed.

[0098] In this embodiment, the longitudinal positioning structure includes a first sliding positioning plate 120 longitudinally slidably mounted on the feeding station 105 and a second sliding positioning plate 121 longitudinally slidably mounted on the suction station 106. The first sliding positioning plate 120 positions the upstream side of the packaging bag and has a receiving groove for accommodating the bag feeding push rod 104. The second sliding positioning plate 121 positions the downstream side of the packaging bag. The first sliding positioning plate 120 and the second sliding positioning plate 121 are adjusted by a second longitudinal adjustment structure and a third longitudinal adjustment structure for bag feeding. The second and third longitudinal adjustment structures for bag feeding are the same as the first longitudinal adjustment structure for bag feeding. The structure includes two first adjustment slots 122 on the bag support plate 102, and a threaded hole on the first sliding positioning plate 120. A first adjustment screw passes through the first adjustment slot 122 and is threadedly connected to the threaded hole. By tightening or loosening the first adjustment screw, the longitudinal position of the first sliding positioning plate 120 can be changed, thereby changing the initial pushing position of the packaging bag at the feeding station 105. The third longitudinal adjustment structure for bag feeding includes two second adjustment slots 123. A second adjustment screw is threadedly connected through the second adjustment slot 123 on the second sliding positioning plate 121. The second sliding positioning plate 121 can adjust the appropriate ending position of the packaging bag at the suction station 106, improving the flexibility of pushing different packaging bags.

[0099] like Figure 2 and Figure 3As shown, the lifting power device includes a bag supply lifting cylinder 119, which is fixedly installed on the bag supply slide plate 108. The bag supply longitudinal slide 103 is provided with an movable notch 126 to facilitate the longitudinal movement of the bag supply lifting cylinder 119. When the bag supply slide plate 108 is adjusted, the bag supply lifting cylinder 119 will change due to the change in the position of the bag supply slide plate 108. Therefore, the movable notch 126 can facilitate the movement of the bag supply lifting cylinder 119, thereby controlling the descent of the bag supply push rod 104. This ensures that the bag supply push rod 104 avoids contact with the packaging bag on the replenishment station 105 when it returns to the replenishment station 105, and then rises from the receiving slot to continue pushing.

[0100] In this embodiment, the bag supply pusher 104 includes a bag supply pusher plate 124 that contacts the packaging bag. The bag supply pusher plate 124 is connected to the guide rod of the bag supply lifting cylinder 119 through a bag supply connecting plate 125. The lower end of the bag supply pusher plate 124 corresponds to the position of the movable notch 126. The bag supply pusher plate 124 can increase the contact area with the packaging bag, making it easier to push. When the guide rod extends or retracts, the bag supply pusher plate 124 will extend or retract accordingly, ensuring that the bag supply pusher plate 124 is not affected.

[0101] like Figure 6 As shown, the bag feeding longitudinal sliding frame includes bag feeding longitudinal guide rods 208 installed on both sides of the bag feeding longitudinal power support 207. The bag feeding longitudinal guide rods 208 are longitudinally slidably installed on the bag feeding connecting plate 206. Bag feeding fixing frames 210 are provided at both the upstream and downstream ends of the bag feeding longitudinal guide rods 208. The bag feeding mounting frame is installed on the bag feeding fixing frame 210. The bag feeding longitudinal power device includes a bag feeding longitudinal cylinder 211, which is installed between the bag feeding longitudinal power support 207 and one of the bag feeding fixing frames 210. A bag feeding synchronization rod 212 is installed between the bag feeding fixing frames 210. Because a bag feeding longitudinal guide rod is fixedly installed below the bag feeding connecting plate 206... The bag feeding longitudinal cylinder 211 is fixedly installed on the bag feeding longitudinal power support 207. The bag feeding longitudinal cylinder 211 is installed in a longitudinal direction, and the guide rod will extend and retract longitudinally. Two bag feeding fixing bushings 209 are symmetrically installed on both sides of the bag feeding longitudinal power support 207. The bag feeding fixing bushings 209 are fixedly installed on the bag feeding connecting plate 206. The bag feeding longitudinal guide rod 208 passes through the bag feeding fixing bushings 209. In this way, when the bag feeding longitudinal cylinder 211 drives the bag feeding fixing frame 210 to move towards the bag feeding station 229, the bag feeding longitudinal guide rod 208 will move longitudinally with it, ensuring accurate longitudinal movement and effectively supporting the bag feeding mounting frame below, thus improving the stability of the device.

[0102] like Figure 7As shown, the bag feeding mounting frame includes a first bag feeding mounting frame 213 and a second bag feeding mounting frame 218. The first bag feeding mounting frame 213 and the second bag feeding mounting frame 218 are respectively installed on the transverse sides of the upstream bag feeding fixing frame 210. The first bag feeding mounting frame 213 and the second bag feeding mounting frame 218 are provided with a bag feeding adjustment structure for adjusting the position of the lifting suction cup 221. The lifting suction cup 221 is also installed on the downstream bag feeding fixing frame 210 on the bag feeding longitudinal guide rod 208. Since the packaging bag is rectangular, it is necessary to effectively suck up the four corners of the packaging bag to ensure that the packaging bag can be stably sucked up and moved. Therefore, the first bag feeding mounting frame 213 and the second bag feeding mounting frame 218 can accurately suck up the packaging bag on both sides of the upstream end, and the packaging bag on the downstream end is sucked up by the lifting suction cup 221 on the downstream bag feeding fixing frame 210 to ensure accurate sucking. The bag feeding adjustment structure can handle packaging bags of different sizes and improve the flexibility of the device.

[0103] Furthermore, the first bag-feeding mounting frame 213 and the second bag-feeding mounting frame 218 have the same structure. The first bag-feeding mounting frame 213 includes a bag-feeding transverse connecting rod 214 and a bag-feeding longitudinal connecting rod 215. The bag-feeding adjustment structure includes a bag-feeding longitudinal strip groove 217 formed on the bag-feeding longitudinal connecting rod 215. The lifting suction cup 221 is constrained within the bag-feeding longitudinal strip groove 217 and locked in place by fasteners. The bag-feeding transverse connecting rod 214 is provided with a bag-feeding transverse strip groove 216. The bag-feeding transverse connecting rod 214 is fixedly mounted on the upstream bag-feeding fixing frame 2 by screws passing through the bag-feeding transverse strip groove 216. On the 10th, the longitudinal connecting rod 215 for feeding bags is fixedly mounted on the transverse connecting rod 214 for feeding bags by screws passing through the longitudinal slot 217 for feeding bags. The downstream bag-feeding fixing frame 210 is provided with a slot 219 for feeding bags to open. The lifting suction cup 221 is constrained within the slot 219 for feeding bags to open and is locked and fixed by fasteners. The second bag-feeding mounting frame 218 also includes a corresponding transverse connecting rod 214 and a longitudinal connecting rod 215 for feeding bags. The longitudinal connecting rod 215 for feeding bags on the second bag-feeding mounting frame 218 is also provided with a corresponding lifting suction cup 221. This symmetrical installation with the first bag-feeding mounting frame 213 ensures that the bag-feeding transverse connecting rod 214 is properly positioned. The connecting rod 214 is installed on both sides of the upstream bag-feeding fixing frame 210, and the bag-feeding transverse connecting rod 214 is provided with a bag-feeding transverse strip groove 216. The fastener is a bag-feeding screw 220, which passes through the bag-feeding transverse strip groove 216 and is threaded to the upstream bag-feeding fixing frame 210. In this way, the position of the bag-feeding transverse connecting rod 214 can be adjusted along the bag-feeding transverse strip groove 216 to change the transverse distance. Thus, the lifting suction cup 221 fixed on the bag-feeding longitudinal connecting rod 215 can be adjusted laterally. Each of the bag-feeding longitudinal connecting rods 215 is equipped with two lifting suction cups 221, and each of the bag-feeding longitudinal connecting rods 215 is also provided with corresponding... The longitudinal strip groove 217 for bag feeding allows the lifting suction cup 221 to be effectively adjusted in position along the longitudinal strip groove 217. In conjunction with the transverse connecting rod 214 for bag feeding, it can be adjusted both horizontally and vertically. At the same time, the downstream bag feeding fixing frame 210 is provided with two transversely symmetrically installed bag feeding opening strip grooves 219. Each bag feeding opening strip groove 219 is equipped with a lifting suction cup 221. The bag feeding opening strip grooves 219 are arranged horizontally, so the lifting suction cups 221 can be adjusted horizontally. With three lifting suction cups 221 on one side that can be adjusted both vertically and horizontally, it is ensured that after the packaging bag is picked up, the packaging bag can move flat without affecting the conveying.

[0104] like Figure 5 and Figure 6As shown, a bag-feeding lifting guide rod 203 is installed on the bag-feeding connecting plate 206. The bag-feeding lifting guide rod 203 is located on both sides of the bag-feeding lifting power support 202. Bag-feeding lifting rotating rollers 204 that cooperate with the bag-feeding lifting guide rod 203 are fixedly installed on both sides of the bag-feeding lifting power support 202. The bag-feeding lifting power device includes a bag-feeding lifting cylinder 205. The guide rod of the bag-feeding lifting cylinder 205 is hinged to the bag-feeding connecting plate 206. Since the bag-feeding lifting power support 202 is fixedly installed on the frame 101 through the support arm 201, the bag-feeding lifting... The power support base 202 supports and installs the bag feeding lifting cylinder 205. The guide rod of the bag feeding lifting cylinder 205 can rise, fall, and retract. Four bag feeding lifting rotating rollers 204 are installed on each side of the bag feeding lifting power support base 202, installed in pairs opposite each other. In this way, the bag feeding lifting guide rod 203 passes vertically through the middle. When the bag feeding lifting cylinder 205 drives the bag feeding connecting plate 206 to rise and fall, the bag feeding lifting guide rod 203 can accurately rise and fall and guide, effectively driving the lifting suction cup 221 to rise and fall stably, improving accurate guidance. Furthermore, the hinge between the guide rod and the bag feeding connecting plate 206 ensures good flexibility.

[0105] In this embodiment, the bag feeding frame 210 is equipped with a bag-limiting structure to limit the descent of the lifting suction cup 221. The bag-limiting structure includes a bag-limiting top block 222 fixedly installed on the upstream bag feeding frame 210 and the downstream bag feeding frame 210. The end of the bag-limiting top block 222 is spherical, and the height of the bag-limiting top block 222 is less than the height of the lifting suction cup 221. In this way, when the lifting suction cup 221 is sucking, the lifting suction cup 221 is compressed until the bag-limiting top block 222 contacts the packaging bag. After the suction is completed, the lifting suction cup 221 can be driven to the upper body, avoiding excessive suction force of the lifting suction cup 221 from affecting the suction effect.

[0106] like Figure 8As shown, the support device includes a support swing arm 223 hinged to the frame 101. A support plate 224 supporting the bottom of the packaging bag is fixedly installed at the free end of the support swing arm 223. A support tilting connecting block 225 is fixedly connected to the hinge of the support swing arm 223. A support linear cylinder 226 is hinged to the frame 101, and the guide rod of the support linear cylinder 226 is hinged to the support tilting connecting block 225. The support swing arm 223 is hinged inside the frame 101 and can tilt back and forth by 90°. The support plate 224 swings synchronously with the support swing arm 223. In this way, the pallet 224 is positioned below the packaging bag downstream, supporting the lower part of the packaging bag. The support swing block 225 is fixedly installed at the hinge of the support swing arm 223, and the guide rod is hinged to the support swing block 225. When the support linear cylinder 226 extends the guide rod, the guide rod can push the support swing block 225 to swing, thereby driving the support swing arm 223 to swing. The support linear cylinder 226 is also hinged to the frame 101. When the guide rod extends, it will also swing with the support swing block 225, thus enabling the support linear cylinder 226 to move and swing effectively. The structure is simple and easy to use.

[0107] like Figure 10As shown, the first and second swing clamping devices have the same structure. The first swing clamping device includes a first clamping mounting base 307 fixedly mounted on the flipping spindle 301. A first clamping link 308 is swingably mounted on the first clamping mounting base 307. The swing center of the first clamping link 308 is perpendicular to the axis of the flipping spindle 301. The free end of the first clamping link 308 is provided with a first bag-clamping claw 311 that can open or close. The first clamping link 308 is driven by a first bag-clamping linear power device to reciprocate and swing, causing the first bag-clamping claw 311 to move closer to or away from the two sides of the bag opening. The flipping spindle 301 is equipped with a bag-clamping limiting structure that restricts the swing range of the first clamping link 308. The first bag-clamping claw 311 is driven by the first bag-clamping opening and closing power device to open and close or release the two sides of the bag opening. In order to accurately open the bag opening, after the bag opening hook 304 is hooked, the two sides need to be tightened to effectively tighten and open the bag opening. In this way, the bag opening is still accurately opened when the bag is flipped. Therefore, the first clamping link 308 can be driven by the first bag-clamping linear power device to pass by one side of the bag opening, and then the first bag-clamping claw 311 is driven by the first bag-clamping opening and closing power device to clamp. The first clamping link 308 is then moved away from the bag opening by the first clamping link 308, and the second swinging clamping device works in the same way. This effectively opens the bag opening. The second swinging device includes a second clamping mounting base 309, on which a second clamping link 310 is swingably mounted. The free end of the second clamping link 310 is also provided with a second bag-clamping claw 312 that can open or close. The second clamping link 310 is driven to reciprocate and swing by a second bag-clamping linear power device, and the second bag-clamping claw 312 is driven to open and close by a second bag-clamping opening and closing power device. The first bag-clamping linear power device includes a first bag-clamping linear cylinder 31. 3. A first cylinder hinge plate 314 and a second cylinder hinge plate 315 are fixedly installed on the flipping main shaft 301. A first bag-clamping linear cylinder 313 is hinged on the first cylinder hinge plate 314. The guide rod of the first bag-clamping linear cylinder 313 is hinged to the upper part of the first clamping link 308, so that the first bag-clamping linear cylinder 313 drives the first clamping link 308 to swing. Similarly, the second bag-clamping linear power device includes a second bag-clamping linear cylinder 316. The second cylinder hinge plate 315 is hinged to the second bag-clamping linear cylinder 316. The guide rod of the second bag-clamping linear cylinder 316 is hinged to the upper part of the second clamping link 310.

[0108] like Figure 12As shown, the first bag-clamping claw 311 includes a first upper claw 317 and a first lower claw 318. The first upper claw 317 and the first lower claw 318 are respectively hinged to the first clamping link 308. The first upper claw 317 is hinged to the power end of the first bag-clamping opening and closing power device. The first upper claw 317 is driven to swing by the first bag-clamping opening and closing power device. A bag-clamping synchronous link 319 is hinged between the first upper claw 317 and the first lower claw 318. When the first upper claw 317 swings, it drives the first lower claw 318 to swing synchronously through the bag-clamping synchronous link 319. A bag-clamping extension link 320 is provided on the first lower claw 318. One end of the bag-clamping synchronous link 319 is hinged to the first upper claw 317, and the other end is hinged to the bag-clamping extension link 320. A bag-clamping sliding strip hole 333 is provided on the bag-clamping extension link 320, so that the hinge point between the bag-clamping extension link 320 and the first lower claw 318 can be slidably hinged. The first bag-clamping opening and closing power device... This includes a first bag-clamping opening and closing cylinder 321, which is hinged to the middle of the first clamping link 308. After the guide rod of the first bag-clamping opening and closing cylinder 321 is hinged to the first upper jaw 317, when the first upper jaw 317 swings upward, the bag-clamping synchronous link 319 also swings upward, thereby driving the bag-clamping extension link 320 to swing upward as well. The first swing is downward. In this way, the first upper jaw 317 and the first lower jaw 318 are controlled by a power device. The opening and closing mechanism saves costs and improves practicality. The second bag-clamping opening and closing power device includes a second bag-clamping opening and closing cylinder 322, which is hinged to the middle of the second clamping link 310. The guide rod of the second bag-clamping opening and closing cylinder 322 is hinged to the second upper claw 323. A bag-clamping synchronous link 319 is also provided between the second upper claw 323 and the second lower claw 324, which can also control the swing of the second upper claw 323 and the second lower claw 324, thus improving practicality.

[0109] In this embodiment, the main deflection adjustment device includes a bag-opening main deflection linkage 305 fixedly connected to the flipping main shaft 301. The frame 101 is provided with a bag-opening support seat 326 for convenient rotational installation of the flipping main shaft 301. A main linear power device is hinged between the bag-opening main deflection linkage 325 and the frame 101, and the main linear power device drives the bag-opening main deflection linkage 325 to swing. The main linear power device includes a bag-opening main linear cylinder 327. The main linear cylinder 327 for opening the bag is vertically hinged to the frame 101. The guide rod of the main swaying link 325 for opening the bag is hinged to the main swaying link 325 for opening the bag. The extension and retraction of the guide rod can cause the main swaying link 325 for opening the bag to swing, and the rotating main shaft 301 can rotate. The opening hook 304, the first clamping link 308 and the second clamping link 310 installed on the rotating main shaft 301 can be effectively deflected, and the main linear cylinder 327 for opening the bag will also swing with the main swaying link 325 for opening the bag, so as to improve the synchronization.

[0110] In this embodiment, the bag clamping and limiting structure includes a bag clamping fixing rod 328 fixedly installed on the flipping main shaft 301. A bag clamping limiting top block 329 that abuts against the outside of the first clamping link 308 is threaded onto the bag clamping fixing rod 328. A corresponding bag clamping limiting structure is also provided on one side of the second swing clamping device. In this way, when the first clamping link 308 and the second clamping link 310 swing outward, they will be abutted by the corresponding bag clamping limiting top block 329, ensuring that the swing amplitude is not too large and the bag opening is not damaged, thus ensuring the accuracy of opening the bag.

[0111] In this embodiment, the contact surfaces of the first upper claw 317 and the first lower claw 318 are provided with mutually cooperating bag-clamping protrusions 330. Similarly, the second upper claw 323 and the second lower claw 324 are also provided with corresponding bag-clamping protrusions 330. This will increase the clamping degree when clamping the two sides of the bag opening, thereby ensuring a firm clamping.

[0112] like Figure 11 As shown, the bag opening shaft 303 has bag opening hook connecting rods 331 fixedly installed at both ends, and the bag opening hook 304 is installed on the bag opening hook connecting rod 331. The bag opening hook connecting rod 331 is provided with a hook adjustment mechanism that can adjust the height of the bag opening hook 304. The hook adjustment device includes two bag opening strip-shaped through holes 332 opened on the bag opening hook connecting rod 331. The bag opening strip-shaped through holes 332 are provided with bag opening adjustment screws 334 that are threadedly connected to the bag opening hook 304. By loosening or tightening the bag opening adjustment screws 334, the height position of the bag opening hook 304 can be adjusted. It can accurately hook and open bags within a certain height range of the conveyed bags, improve the flexibility of the hook, and improve the use effect.

[0113] like Figure 12As shown, the opening mechanism includes an opening lifting frame 335 that is slidably mounted on a frame 101. An opening auxiliary suction plate 336 is fixedly mounted on the opening lifting frame 335. An opening suction cup 337 is also mounted on the opening lifting frame 335. The opening auxiliary suction plate 336 has an exposure hole 338 for easy exposure of the opening suction cup 337. An opening lifting power device for driving the opening lifting frame 335 to rise and fall is mounted on the frame 101. The opening lifting power device includes an opening lifting cylinder 339, which is vertically fixed on an opening fixing seat 340. The opening fixing seat 340 is fixedly mounted on the machine... On the frame 101, the opening fixing seat 340 is provided with a ventilation rod 341 that connects the opening lifting frame 335 and the opening suction cup 337. The ventilation rod 341 is connected to the air extraction system 227, which facilitates the opening suction cup 337 to pick up the bag. At the same time, a guide spring 342 is provided between the opening lifting frame 335 and the opening fixing seat 340. The guide spring 342 is provided with a spring guide rod 343, which effectively plays a role in guiding the bag accurately. The exposed hole 338 ensures that the opening suction cup 337 can accurately pick up the packaging bag during use, and the opening of the packaging bag can also make even contact with the opening auxiliary suction plate 336, effectively supporting the packaging bag and ensuring a good opening effect.

[0114] The top of the frame 101 is equipped with a corresponding suction system 227 and a blowing system 228. The lifting suction cup 221 and the open suction cup 337 are provided with suction ports. The suction ports are connected to the suction system 227 through suction pipes and ventilation pipes for easy suction. At the same time, each cylinder also needs to be inlet and outlet for the guide rod to control the extension and retraction. By setting the suction system 227 and the blowing system 228 at the top, it is easy to connect the ventilation pipe.

[0115] The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications and alterations made to the technical solutions of the present invention without departing from the spirit of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A method for automatic feeding of bags in a packaging machine, characterized in that: Comprise the following steps: S1, provide an automatic bag feeder, the automatic bag feeder comprises a rack, a bag support plate is arranged on the rack, the bag support plate is provided with a transverse limiting structure for transversely limiting the packaging bag, the bag support plate is provided with a longitudinal positioning structure for longitudinally positioning the packaging bag, the transverse limiting structure and the longitudinal positioning structure form a placement area for placing the packaging bag, a replenishment station and a suction station are arranged on the placement area, a longitudinal sliding bag feeding slide is arranged on the rack, a bag feeding push rod is installed on the longitudinal sliding bag feeding slide, at least two longitudinal strip-shaped holes for extending from the replenishment station to the suction station are arranged on the bag support plate, the bag feeding push rod penetrates through the bag support plate and is constrained in the longitudinal strip-shaped hole, the bag feeding push rod drives the longitudinal sliding bag feeding slide to reciprocate between the replenishment station and the suction station through the longitudinal sliding driving device, and the bag feeding push rod is driven to rise and fall by the bag feeding lifting power device so that the bag feeding push rod is higher or lower than the support surface of the bag support plate; The rack is also provided with a bag feeding device, the bag feeding device comprises a bag feeding lifting power support seat fixedly installed on the rack, a bag feeding lifting power device is installed on the bag feeding lifting power support seat, a bag feeding connecting plate is arranged below the bag feeding lifting power support seat, the bag feeding connecting plate is driven to rise and fall by the bag feeding lifting power device, a bag feeding longitudinal power support seat is fixedly installed below the bag feeding connecting plate, a bag feeding longitudinal power device is fixedly installed on the bag feeding longitudinal power support seat, a bag feeding longitudinal sliding frame is longitudinally slidably installed on the bag feeding connecting plate, the bag feeding longitudinal sliding frame is driven to longitudinally slide between the suction station and the bag feeding station by the bag feeding longitudinal power device, a bag feeding mounting frame is fixedly installed below the bag feeding longitudinal sliding frame, a plurality of lifting suction cups for sucking the packaging bag are installed on the bag feeding mounting frame, the lifting suction cups are communicated with a suction system, and a supporting device for supporting the bottom of the packaging bag is also installed on the rack; The rack is also provided with an opening and turning device above the bag feeding station; the opening and turning device comprises a turning main shaft rotatably installed on the rack and located above the bag feeding station, an opening mounting seat is fixedly installed in the middle of the turning main shaft, an opening shaft is rotatably installed on the opening mounting seat, opening hooks are installed at both ends of the opening shaft, the opening shaft is driven to rotate by an opening deflection adjusting device, first and second swing clamping devices for clamping both ends of the packaging bag are arranged at both ends of the turning main shaft, the turning main shaft is driven to rotate by a main deflection adjusting device, and an opening mechanism for sucking the lower part of the packaging bag mouth to make the packaging bag open is installed below the opening hooks on the rack; S2, a stack of packaging bags is placed on the replenishment station of the bag support plate; S3, the bag feeding push rod is driven to protrude from the longitudinal strip-shaped hole by the bag feeding lifting power device and is pushed to the suction station by the bag feeding longitudinal sliding driving device, and the packaging bag on the replenishment station is kept. S4, the bag feeding lifting power device drives the lifting suction disc in the suction station to descend and suck the first packaging bag on the upper layer, and then rises, and then the bag longitudinal sliding frame driven by the bag longitudinal power device moves from the suction station to the bag feeding station; S5, the supporting device supports the bottom of the packaging bag in the bag feeding station; S6, the opening mechanism sucks the bottom of the bag opening of the packaging bag on the lifting suction disc and moves downward to open the bag opening; S7, the bag opening deflection adjusting device drives the bag opening shaft to deflect, and the bag opening hook is hooked in the bag opening of the packaging bag; S8, the first swing clamping device and the second swing clamping device clamp the bag opening edge of the packaging bag from the side; S9, the lifting suction disc releases the packaging bag and then resets horizontally; S10, the main deflection adjusting device drives the turning main shaft to rotate, so that the bag opening hook, the first swing clamping device and the second swing clamping device clamp the packaging bag and deflect 90°, and in the process of deflection of the turning main shaft, the supporting device continuously supports the bottom of the packaging bag; finally, the bag opening of the packaging bag is upwardly supplied to the bag clamping mechanism of the bag filling machine, and the bag feeding is completed; S11, the bag opening deflection adjusting device drives the bag opening shaft to deflect reversely, so that the bag opening hook is separated from the bag opening of the packaging bag, and at the same time, the supporting device resets to avoid the space for the lifting suction disc to suck the packaging bag; S12, after the first swing clamping device and the second swing clamping device release the packaging bag, the main deflection adjusting device drives the turning main shaft to rotate and reset; S13, repeat steps S4 to S12 to supply the bag clamping mechanism of the bag filling machine with the packaging bags one by one; S14, during the feeding of the last packaging bag of a stack of packaging bags, a new stack of packaging bags is placed on the material supplementing station of the bag supporting plate; S15, the bag feeding push rod is driven by the bag feeding lifting power device to descend below the bag supporting plate, and then the bag feeding longitudinal sliding driving device moves the bag feeding push rod from the suction station to the material supplementing station; after the last packaging bag is sucked and rises by the lifting suction disc, repeat step S3 to complete the material supplementing of the packaging bags; the driving mode of the bag feeding longitudinal sliding driving device for the bag feeding push rod is that the bag feeding first connecting rod and the bag feeding second connecting rod are hingedly connected with each other, the length of the bag feeding first connecting rod is longer than that of the bag feeding second connecting rod, one end of the bag feeding first connecting rod is hingedly connected with the bag feeding longitudinal sliding seat, the bag feeding first connecting rod is hingedly connected with the rack, the bag feeding longitudinal sliding driving device is a bag feeding linear power device, the bag feeding linear power device is hingedly connected with the rack and the middle part of the bag feeding first connecting rod, the bag feeding linear power device is used to drive the bag feeding first connecting rod to swing, and then the bag feeding second connecting rod swings to drive the bag feeding longitudinal sliding seat to slide; the longitudinal sliding frame is provided with bag suction limiting structures for limiting the descending position of the lifting suction disc, when the lifting suction disc is driven to descend, the lifting suction disc first contacts the upper surface of the uppermost packaging bag, then is vacuumized and continues to descend to press the uppermost packaging bag, when the bag suction limiting structure contacts the upper surface of the uppermost packaging bag, the pressing force between the lifting suction disc and the uppermost packaging bag reaches the maximum allowable value.

2. A method of automatically feeding bags to a packaging machine as claimed in claim 1, characterized in that: The position of the lifting suction disc is adjustable in the transverse position and the longitudinal position.

3. A method of automatically feeding bags to a packaging machine as defined in claim 2, characterized in that: In step S8, the first swing clamping device and the second swing clamping device first swing and clamp the bag opening edge of the packaging bag from the side, and then swing outward to horizontally stretch and tension the packaging bag.

4. A method of automatically feeding bags to a packaging machine as defined in claim 3, characterized in that: The first swing clamping device and the second swing clamping device are limited by the bag clamping limiting blocks when swinging outward.

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