A bag loading mechanism for a bag packing machine

Abstract

This application relates to a bag-loading mechanism of a bag-loading packaging machine, belonging to the technical field of bag-loading packaging machines. It includes a base and a clamping assembly. Two parallel vertical plates and a barrier plate located on the same vertical side of the two vertical plates are fixed to the upper surface of the base. A lifting plate that slides vertically between the two vertical plates is provided. A limiting member is provided on the vertical edge of the vertical plates away from the barrier plate. The lifting plate is inclined downwards. A driving member is fixed to the base. The clamping assembly includes a crossbar located above the two vertical plates and a power member mounted on the base. Two fixing blocks located between the two vertical plates are fixed side-by-side on the crossbar. A negative pressure suction cup and a pressing part are fixed to the fixing blocks. An output shaft is fixed to the power member. A connecting member is provided above the base. A bending operation causes the lower packaging bag to detach from the bottom of the clamped packaging bag, preventing the simultaneous clamping of two packaging bags.

Description

Technical Field

[0001] This application relates to the technical field of bag-feeding packaging machines, and in particular to a bag-feeding mechanism for a bag-feeding packaging machine. Background Technology

[0002] In the booming health food market, many snack products have won the favor of consumers. As consumers continue to pursue a higher quality of life, their demands for food packaging are becoming increasingly diversified. They not only expect packaging to effectively protect the freshness and safety of products, but also place greater emphasis on the ease of use and visual appeal of packaging.

[0003] In related technologies, a bag-packing machine mainly includes a base, a rotating sleeve, and a rotating disk. The rotating sleeve is rotatably mounted on the base, and the rotating disk is fixed to the upper end of the rotating sleeve. A drive assembly is installed inside the base to drive the rotating sleeve to rotate, and a clamping assembly is fixed on the rotating disk to clamp the packaging bags. Multiple functional components are arranged sequentially around the rotating disk on the base, among which the feeding assembly is responsible for clamping the packaging bags onto the clamping assembly. The feeding assembly includes a feeding conveyor belt and a feeding negative pressure suction cup. The feeding conveyor belt is inclined downwards along the direction close to the base, and the packaging bags are stacked on it. The feeding negative pressure suction cup can move up and down under the action of a cylinder to adsorb and clamp the packaging bag at the top of the discharge side for subsequent operation of the clamping assembly.

[0004] However, when feeding larger, softer bags, static electricity can cause another bag to adhere tightly to the bottom side of the bag being gripped when using the negative pressure suction cup to pick it up from the top of the feed nozzle. This results in two bags being gripped simultaneously. Subsequent gripping components can only grip each bag individually, unable to handle two bags at once. Furthermore, bags attracted by static electricity may detach during gripping, scattering the previously tightly arranged bags on the feed conveyor belt and hindering subsequent gripping. Both of these situations require manual intervention, severely impacting overall packaging efficiency and indicating room for improvement. Utility Model Content

[0005] The purpose of this application is to provide a bag feeding mechanism for a bag packaging machine, which solves the problem in the above-mentioned related technologies that when feeding large and soft packaging bags, static electricity may cause two packaging bags to be clamped at the same time, requiring manual intervention to sort them, which ultimately affects the overall packaging efficiency.

[0006] The bag feeding mechanism of the bag-feeding packaging machine provided in this application adopts the following technical solution:

[0007] A bag-loading mechanism for a bag-packing machine includes a base and a clamping assembly. Two parallel vertical plates and a barrier plate located on the same vertical side of the two vertical plates are fixedly mounted on the upper surface of the base. A lifting plate that slides vertically is provided between the two vertical plates. A limiting member is provided on the vertical edge of each vertical plate away from the barrier plate. The lifting plate is inclined downwards towards the barrier plate. A driving member for moving the lifting plate up and down is fixedly mounted on the base. The clamping assembly includes a crossbar located above the two vertical plates and a power member mounted on the base. The mounting bracket has two fixing blocks located between two vertical plates. A negative pressure suction cup is fixed on each fixing block, and a pressing part is fixed on each fixing block to press the topmost packaging between the two vertical plates. An output shaft is fixed on the power unit. A connector connecting the crossbar and the output shaft is provided above the base. The power unit can drive the crossbar, fixing blocks, and negative pressure suction cup to rotate around the output shaft through the connector. When the negative pressure suction cup rotates downward, it grips the topmost packaging bag. When it rotates upward, the pressing part presses the upper side of the topmost packaging bag to bend it.

[0008] By adopting the above technical solution, when the negative pressure suction cup rotates downwards to grip the topmost packaging bag, its upward rotation causes the pressing part on the fixed block to press down on the upper side of the topmost packaging bag, causing it to bend. Due to electrostatic adsorption, the gripped packaging bag and the packaging bag below it will stick together, and the bending operation will cause the lower packaging bag to detach from the bottom of the gripped packaging bag, avoiding the situation of gripping two packaging bags at the same time, thus eliminating the need for staff to intervene and tidy up the situation. At the same time, this design reduces the possibility of packaging bags scattering on the feeding conveyor belt due to electrostatic adsorption causing packaging bags to detach, ensuring the orderliness of packaging bags during the feeding process, thereby ensuring that the subsequent gripping components can smoothly and efficiently grip the packaging bags one by one, significantly improving the overall packaging efficiency.

[0009] Optionally, the connecting component includes a linkage plate, a transmission rod fixed to the outer periphery of the output shaft, and a connecting rod fixedly connected to the end of the transmission rod away from the output shaft; the end of the connecting rod away from the transmission rod is rotatably connected to one end of the linkage plate; a pressing rod located above the connecting rod is rotatably sleeved on the outer periphery of the output shaft; an elastic element that drives the pressing rod to rotate downward is provided above the base; a connecting shaft rotatably connected to the middle of the linkage plate is fixed on the pressing rod; the end of the crossbar near the output shaft is fixedly connected to the end of the linkage plate away from the connecting rod; a limiting wheel is fixedly provided on the bottom surface of the pressing rod; a limiting protrusion is fixedly provided above the base located below the limiting wheel; the axes of the crossbar, the output shaft, and the connecting shaft are parallel to each other; the power component drives the pressing rod and the crossbar to rotate around the axis of the output shaft; when the limiting wheel and the upper surface of the limiting protrusion are pressed together, the output shaft drives the crossbar to rotate around the axis of the connecting shaft.

[0010] By adopting the above technical solution, the negative pressure suction cup can more fully and accurately clamp the topmost packaging bag, improving the reliability and stability of bag clamping. The power component drives the squeezing rod and crossbar to rotate around the output shaft axis; this is the first step in the rotation of the negative pressure suction cup, allowing it to initially approach the packaging bag. When the limiting wheel abuts against the upper surface of the limiting protrusion, the output shaft continues to rotate, driving the crossbar to rotate around the connecting shaft axis; this is the second step in the rotation of the negative pressure suction cup. This two-step rotation design allows the negative pressure suction cup to first perform initial positioning before accurately clamping the packaging bag, ensuring full contact between the suction cup and the packaging bag and effectively avoiding clamping failure due to insufficient contact.

[0011] Optionally, a limiting gap is provided between the barrier plate and the vertical plate. A pressing rod located within the limiting gap is rotatably mounted on the barrier plate. The pressing rod is used to limit the side edge of the uppermost packaging bag near the barrier plate. A proximity switch located below the pressing rod and capable of controlling the operation of the power component is fixed on the barrier plate. After the negative pressure suction cup clamps the uppermost packaging bag, the pressing rod rotates downward and abuts against the upper surface of the proximity switch. When the lifting plate moves up, the pressing rod can rotate upward and separate from the upper surface of the proximity switch.

[0012] By adopting the above technical solution, when the driving component moves the lifting plate upward, the topmost packaging bag causes the pressing rod to rotate upward, separating the pressing rod from the upper surface of the proximity switch. The proximity switch then controls the power component to operate, causing the negative pressure suction cup to clamp the topmost packaging bag. Then, under its own gravity, the pressing rod rotates downward again and comes into contact with the upper surface of the proximity switch once more. The lifting plate continues to move upward, and this cycle repeats.

[0013] Optionally, the limiting component includes a limiting rod that slides on the inner walls of the two vertical plates close to each other. The installation direction of the limiting rod is perpendicular to the upper surface of the lifting plate, and the sliding direction is parallel to the upper surface of the lifting plate. A locking component is provided on the outside of the vertical plate to fix the sliding state of the limiting rod.

[0014] By adopting the above technical solution, the lifting plate moves upward, causing the topmost packaging bag to rise. This, in turn, pushes the pressing rod upward to rotate and separate from the proximity switch. At this moment, the proximity switch detects the signal change and immediately controls the power component to operate, enabling the negative pressure suction cup to promptly grip the topmost packaging bag. This process cleverly utilizes the change in the packaging bag's position to trigger the power component, ensuring the timeliness and accuracy of the gripping action. After gripping, the pressing rod rotates downward under its own gravity, re-engaging with the proximity switch, preparing for the next cycle. The lifting plate continues to move upward, pushing subsequent packaging bags upward, and so on, repeating the cycle. The entire process requires no manual intervention, automating the bag loading operation, reducing errors caused by human factors, improving the continuity and stability of the packaging process, and also reducing labor costs.

[0015] Optionally, the locking component includes a locking bolt, a locking plate located on the sides of the two vertical plates that are far apart from each other, and a side locking block located on the sides of the two vertical plates that are close to each other. The upper part of the vertical plate has a guide groove whose length direction is parallel to the side of the lifting plate. The bottom surface of the locking block is fixedly connected to the upper end of the limiting rod. The locking block has a locking protrusion that slides into the guide groove. The locking protrusion has a locking screw hole. The locking plate has a locking through hole. The locking bolt passes through the locking through hole and can be screwed into the locking screw hole.

[0016] By adopting the above technical solution, a guide groove is opened on the vertical plate, and the locking block is slidably inserted into it through the locking protrusion. This allows the limiting rod connected to the locking block to be adjusted in position along the guide groove, thereby adapting to the clamping needs of packaging bags of different sizes and specifications, and enhancing the versatility and adaptability of the bag-loading mechanism. After being adjusted to the appropriate position, the locking block can be firmly fixed to the vertical plate by passing the locking bolt through the locking hole on the locking plate and screwing it into the locking screw hole on the locking protrusion. This ensures that components such as the limiting rod remain stable during subsequent operation and will not be displaced due to vibrations or other factors generated during equipment operation, thus guaranteeing the stability and reliability of the bag-loading mechanism.

[0017] Optionally, an inclined support platform is fixedly provided on the upper surface of the base platform, the upper surface of the support platform is parallel to the upper surface of the lifting plate, the bottom side of the barrier plate is fixedly connected to the upper surface of the support platform, and an adjusting component is provided on the support platform to adjust the distance between the two vertical plates.

[0018] By adopting the above technical solution, the adjustable components on the support platform can adjust the distance between the two vertical plates. This design is ingenious and practical, allowing the bag-loading mechanism to flexibly adjust the vertical plate distance according to different sizes of packaging bags, thus adapting to diverse packaging needs. Whether the packaging bag is small or large, adjusting the vertical plate distance ensures that the bag is accurately gripped and stably conveyed during the bag-loading process, avoiding problems such as bag-loading failure or low efficiency caused by size mismatch.

[0019] Optionally, the adjusting component includes an adjusting screw rotatably mounted above the support platform and adjusting blocks fixed to the bottom side of the vertical plate. The adjusting blocks are slidably mounted on the upper side of the support platform, and the two adjusting blocks can slide back and forth along the length of the adjusting screw. A handwheel is fixed at one end of the adjusting screw, and the outer circumferences of the two ends of the adjusting screw are respectively threaded portions with opposite directions of rotation. Adjusting screw holes are opened on the two adjusting blocks for the adjusting screw to screw into and pass through. When the adjusting screw rotates, it drives the two adjusting blocks to slide towards and away from each other.

[0020] By adopting the above technical solution, the operator only needs to turn the handwheel to drive the adjusting screw. Due to the opposing threads on the outer circumferences of the two ends of the adjusting screw, and the matching adjusting screw holes on the two adjusting blocks, the two adjusting blocks can slide towards or away from each other along the length of the adjusting screw, thereby moving the two vertical plates and achieving flexible adjustment of the spacing. This design is simple to operate, requiring no complex tools or professional personnel, reducing operational difficulty and cost. At the same time, precise spacing adjustment ensures that packaging bags of different sizes can be stably gripped and transported during the bagging process, avoiding bagging problems caused by size mismatch, and improving packaging efficiency and quality.

[0021] Optionally, the fixing block can slide back and forth along the length of the crossbar, and the pressing part has a limiting notch on the side facing the base for the upper edge of the vertical plate to be inserted. When the pressing part rotates, the upper edge of the vertical plate rotates synchronously relative to the limiting notch.

[0022] By adopting the above technical solution, a limiting notch is opened on the side of the pressing part facing the base for the upper edge of the vertical plate to be inserted. During the rotation of the pressing part, the upper edge of the vertical plate rotates synchronously relative to the limiting notch. This matching design not only provides stable guidance and support for the rotation of the pressing part, but also limits the offset of the pressing part during the rotation process, ensuring the accuracy and stability of the pressing action.

[0023] In summary, this application includes the following beneficial technical effects:

[0024] When the negative pressure suction cup rotates downwards to grip the topmost packaging bag, rotating upwards causes the pressing part on the fixing block to press down on the top side of the topmost packaging bag, causing it to bend. Due to electrostatic adsorption, the gripped packaging bag and the packaging bag below it will stick together, and the bending operation will cause the packaging bag below to detach from the bottom of the gripped packaging bag, avoiding the situation of gripping two packaging bags at the same time, thus eliminating the need for staff to intervene in handling this issue. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0027] Figure 2 This is a partial structural diagram illustrating the installation and engagement of the limiting component in an embodiment of this application;

[0028] Figure 3 This is a partial cross-sectional structural diagram illustrating the installation and assembly of the power components in an embodiment of this application;

[0029] Figure 4 This is a cross-sectional structural diagram illustrating the installation and mating of the drive components in an embodiment of this application;

[0030] Figure 5 This is a partial structural diagram illustrating the installation and mating of the connecting parts in an embodiment of this application;

[0031] Figure 6 This is a partial structural diagram illustrating the installation and cooperation of the limiting wheel and the limiting protrusion plate in an embodiment of this application;

[0032] Figure 7 This is a partial structural diagram illustrating the installation and fit of the adjusting component in an embodiment of this application;

[0033] Figure 8 This is a partial cross-sectional view of the installation and fit of the limiting component in an embodiment of this application;

[0034] Figure 9 This is a partial structural diagram illustrating the installation and mating of the fixing block in an embodiment of this application;

[0035] Figure 10 This is a partial structural diagram illustrating the installation and cooperation of the push rod and the proximity switch in an embodiment of this application.

[0036] In the diagram, 1. Base; 11. Frame; 12. Limiting protrusion; 13. Support platform; 2. Limiting assembly; 21. Vertical plate; 211. Guide slot; 22. Barrier plate; 23. Lifting plate; 24. Driving component; 241. Driving electric cylinder; 25. Pressing rod; 26. Proximity switch; 3. Clamping assembly; 31. Crossbar; 32. Power component; 321. Output shaft; 33. Fixing block; 34. Pressing part; 341. Limiting notch; 35. Negative 4. Pressure suction cup; 4. Connecting component; 41. Linkage plate; 42. Transmission rod; 43. Connecting rod; 44. Extrusion rod; 441. Connecting shaft; 442. Limiting wheel; 45. Elastic component; 451. Tension spring; 5. Adjusting component; 51. Adjusting screw; 511. Handwheel; 52. Adjusting block; 6. Limiting component; 61. Limiting rod; 62. Locking component; 621. Locking bolt; 622. Locking plate; 623. Locking block; 6231. Locking protrusion. Detailed Implementation

[0037] The present application will be further described in detail below with reference to all the accompanying drawings.

[0038] Example:

[0039] Reference Figure 1 , Figure 2 and Figure 3A bag-loading mechanism for a bag-packaging machine includes a base 1, a limiting component 2, and a clamping component 3. The limiting component 2 includes two vertical plates 21 fixed side by side to the upper surface of the base 1, a barrier plate 22 fixed to the base 1 and located on the same vertical side of the two vertical plates 21, and a lifting plate 23 located between the two vertical plates 21 and capable of sliding up and down. The vertical edge of the vertical plate 21 away from the barrier plate 22 is provided with a limiting member 6. The lifting plate 23 is inclined downward towards the barrier plate 22. A driving member 24 that drives the lifting plate 23 to move up and down is fixed on the base 1.

[0040] The clamping assembly 3 includes two horizontal bars 31 located above the two vertical plates 21 and a power component 32 mounted on the base 1. Two fixing blocks 33 are fixed side-by-side between the two vertical plates 21 on the two horizontal bars 31. A negative pressure suction cup 35 is fixed to each fixing block 33. A pressing part 34 is integrally formed on each fixing block 33 to press the topmost packaging piece on the two vertical plates 21. An output shaft 321 is fixed to the power component 32. A connecting piece 4 is provided above the base 1 to connect the horizontal bars 31 and the output shaft 321. The power component 32 can drive the horizontal bars 31, fixing blocks 33, and negative pressure suction cup 35 to rotate around the output shaft 321 via the connecting piece 4.

[0041] When the negative pressure suction cup 35 rotates downward around the output shaft 321 with the crossbar 31, it can clamp the uppermost packaging bag; when the negative pressure suction cup 35 rotates upward under the action of the power component 32, the pressing part 34 on the fixing block 33 presses the upper side of the uppermost packaging bag to bend it. At this time, even if the clamped packaging bag and the other packaging bag below are attracted together by electrostatic attraction, after bending, the lower packaging bag attracted by electrostatic attraction will fall off the bottom surface of the clamped packaging bag.

[0042] Reference Figure 3 A frame 11 is fixed on the upper surface of the base 1. The power component 32 is a combination structure of a power motor and a reducer fixed in the frame 11. This is a conventional drive structure used to drive the output shaft 321 extending to the outside of the frame 11 to rotate. It will not be described in detail here.

[0043] Reference Figure 4 The driving component 24 is a driving electric cylinder 241 fixed on the lower side of the base 1. The end of the telescopic rod of the driving electric cylinder 241 is fixedly connected to the bottom surface of the lifting plate 23. When the bag-loading mechanism is running, each time the uppermost packaging bag is gripped by the negative pressure suction cup 35, the cylinder returns to drive the lifting plate 23 to move upward a certain height, lifting the packaging bag to a position that is easy for the negative pressure suction cup 35 to grip.

[0044] Reference Figure 3 , Figure 5 and Figure 6The connecting component 4 includes a linkage plate 41, a transmission rod 42 fixed on the outer periphery of the output shaft 321, and a connecting rod 43 fixedly connected to the end of the transmission rod 42 away from the output shaft 321; wherein the end of the connecting rod 43 away from the transmission rod 42 is rotatably connected to one end of the linkage plate 41.

[0045] An extrusion rod 44 located above the connecting rod 43 is rotatably sleeved on the outer periphery of the output shaft 321. An elastic element 45 is provided above the base 1 to drive the extrusion rod 44 to rotate downward. The elastic element 45 is specifically a tension spring 451, wherein the upper end of the tension spring 451 is fixedly connected to the bottom surface of the extrusion rod 44, and the lower end of the tension spring 451 is fixedly connected to the lower part of the frame 11.

[0046] A connecting shaft 441, which is rotatably connected to the middle of the linkage plate 41, is fixed on the extrusion rod 44. The end of the crossbar 31 near the output shaft 321 is fixedly connected to the end of the linkage plate 41 away from the connecting rod 43. A limiting wheel 442 is fixed on the bottom surface of the extrusion rod 44. A limiting protrusion 12 located below the limiting wheel 442 is fixed on the top of the base 1. The axes of the crossbar 31, the output shaft 321 and the connecting shaft 441 are parallel to each other.

[0047] The rotation of the negative pressure suction cup 35 is divided into two steps: First, the power component 32 drives the squeezing rod 44, connecting rod 43, linkage plate 41 and crossbar 31 to rotate around the axis of the output shaft 321. At this time, the limiting wheel 442 is still not in contact with the upper surface of the limiting protrusion 12. Second, the output shaft 321 continues to drive the transmission rod 42 and connecting rod 43 to rotate downward. At this time, the linkage plate 41 can no longer rotate around the output shaft 321, but the linkage plate 41 can rotate around the axis of the connecting shaft 441, further driving the negative pressure suction cup 35 to rotate, so that the negative pressure suction cup 35 can fully clamp and hold the packaging bag at the top.

[0048] Reference Figure 7 Base 1 (see Figure 2 An inclined support platform 13 is fixed on the upper surface, wherein the upper surface of the support platform 13 is parallel to the upper surface of the lifting plate 23, and an adjustment component 5 is provided on the support platform 13 to adjust the distance between the two vertical plates 21; the staff can adjust the distance between the two vertical plates 21 according to the actual width of the packaging bag.

[0049] Reference Figure 7 The adjusting component 5 includes an adjusting screw 51 rotatably mounted on the support platform 13 and an adjusting block 52 fixed on the bottom side of the vertical plate 21. The adjusting block 52 is slidably mounted on the upper side of the support platform 13, and the two adjusting blocks 52 can slide back and forth along the length direction of the adjusting screw 51.

[0050] A handwheel 511 is fixed at one end of the adjusting screw 51. The outer circumferences of the two ends of the adjusting screw 51 are respectively formed with threads in opposite directions. The two adjusting blocks 52 are provided with adjusting screw holes (not shown in the figure) for the adjusting screw 51 to be screwed in and pass through. The operator can drive the adjusting screw 51 to rotate by the handwheel 511, which in turn can drive the two adjusting blocks 52 to slide towards and away from each other, thereby adjusting the distance between the two vertical plates 21.

[0051] Reference Figure 7 and Figure 8 The limiting component 6 includes a limiting rod 61 that slides on the inner walls of the two vertical plates 21 close to each other. The installation direction of the limiting rod 61 is perpendicular to the upper surface of the lifting plate 23, and the sliding direction is parallel to the upper surface of the lifting plate 23. The outside of the vertical plate 21 is provided with a locking component 62 to fix the sliding state of the limiting rod 61. The locking component 62 includes a locking bolt 621, a locking plate 622 located on the side of the two vertical plates 21 away from each other, and a locking block 623 located on the side of the two vertical plates 21 close to each other. The upper part of the vertical plate 21 is provided with a guide groove 211 whose length direction is parallel to the upper side of the lifting plate 23. The locking bolt 621 is a wing bolt.

[0052] The bottom surface of the locking block 623 is fixedly connected to the upper end of the limiting rod 61. A locking protrusion 6231 is integrally formed on one side of the locking block 623 and slides into the guide groove 211. The locking protrusion 6231 is provided with a locking screw hole, and the locking plate 622 is provided with a locking through hole. The locking bolt 621 can be screwed into the locking screw hole after passing through the locking through hole. When the length of the clamped packaging bag is different, the staff can adjust the distance between the limiting rod 61 and the barrier plate 22 by tightening or loosening the locking bolt 621, so as to better limit the packaging bag.

[0053] Reference Figure 9 The bottom side of the barrier plate 22 is fixedly connected to the upper surface of the support platform 13 by screws. The fixing block 33 can slide back and forth along the length of the crossbar 31. The pressing part 34 has a limiting notch 341 on the side facing the base 1 for the upper edge of the vertical plate 21 to be inserted. When the pressing part 34 rotates, the upper edge of the vertical plate 21 rotates synchronously relative to the limiting notch 341. That is, the opening of the limiting notch 341 will not interfere with the rotation of the negative pressure suction cup 35.

[0054] When the distance between the two vertical plates 21 is adjusted synchronously, the upper edge of the vertical plate 21 is always inserted into the corresponding limiting notch 341, so that the distance between the two fixed plates is adjusted synchronously; this can not only enhance the installation stability between the two vertical plates 21, but also slide and fix the fixed plates.

[0055] Reference Figure 9 and Figure 10A limiting gap is provided between the barrier plate 22 and the vertical plate 21. A pressing rod 25 is rotatably mounted on the barrier plate 22 and located within the limiting gap. The pressing rod 25 is used to limit the side edge of the uppermost packaging bag near the barrier plate 22. A proximity switch 26 located below the pressing rod 25 and capable of controlling the operation of the power component 32 is fixed on the barrier plate 22. After the negative pressure suction cup 35 clamps the uppermost packaging bag, the pressing rod 25 rotates downward and abuts against the upper surface of the proximity switch 26. When the lifting plate 23 moves upward, the pressing rod 25 can rotate upward and separate from the upper surface of the proximity switch 26.

[0056] The lifting plate 23 moves upward, causing the topmost packaging bag to rise, which in turn pushes the pressing rod 25 to rotate upward and separate from the proximity switch 26. At this time, the proximity switch 26 detects the signal change and immediately controls the power component 32 to operate, so that the negative pressure suction cup 35 can clamp the topmost packaging bag in time. After clamping, the pressing rod 25 rotates downward under its own gravity and abuts against the proximity switch 26 again, preparing for the next cycle. The lifting plate 23 continues to move upward, pushing the subsequent packaging bags to rise, and so on.

[0057] The implementation principle of this application embodiment is as follows:

[0058] When the bag-loading mechanism of the bag-loading machine is running, the drive cylinder 241 drives the lifting plate 23 to move up and down, raising the packaging bag to a position where it can be easily gripped by the negative pressure suction cup 35. The combination of the power motor and reducer drives the output shaft 321 to rotate. Through the linkage plate 41, transmission rod 42, connecting rod 43 and other components in the connecting part 4, the negative pressure suction cup 35 rotates in two steps: first around the axis of the output shaft 321, and then around the axis of the connecting shaft 441, fully clamping the packaging bag at the top. During the clamping process, the pressing part 34 presses the upper side of the packaging bag to bend it, allowing the packaging bag below, which is electrostatically adsorbed, to fall off. At the same time, the distance between the two vertical plates 21 can be adjusted by the adjusting part 5 to accommodate packaging bags of different widths, and the distance between the limiting rod 61 and the barrier plate 22 can be adjusted by the locking part 62 to accommodate packaging bags of different lengths.

[0059] In addition, the lifting plate 23 moves upward, causing the topmost packaging bag to rise, which in turn pushes the pressing rod 25 to rotate upward and separate from the proximity switch 26. At this time, the proximity switch 26 detects the signal change and immediately controls the power component 32 to operate, so that the negative pressure suction cup 35 can clamp the topmost packaging bag in time. After clamping, the pressing rod 25 rotates downward under its own gravity and abuts against the proximity switch 26 again, preparing for the next cycle. The lifting plate 23 continues to move upward, pushing the subsequent packaging bags to rise, and so on.

[0060] Unless otherwise defined, the terms or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar words used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "a" or "one," and similar words do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising," "including," and similar words mean that the element or object preceding "comprising" encompasses the element or object listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0061] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be included within the scope of protection of this application.

Claims

1. A bag feeding mechanism for a bag packaging machine, characterized in that, The system includes a base (1) and a clamping assembly (3). The upper surface of the base (1) is fixed with two parallel vertical plates (21) and a barrier plate (22) located on the vertical side of the same side of the two vertical plates (21). A lifting plate (23) that slides up and down is provided between the two vertical plates (21). A limiting member (6) is provided on the vertical edge of the vertical plate (21) away from the barrier plate (22). The lifting plate (23) is inclined downward towards the barrier plate (22). A driving member (24) that drives the lifting plate (23) to move up and down is fixed on the base (1). The clamping assembly (3) includes a crossbar (31) located above the two vertical plates (21) and a power component (32) mounted on the base (1). Two fixing blocks (33) located between the two vertical plates (21) are fixed side by side on the crossbar (31). A negative pressure suction cup (35) is fixed on the fixing block (33). A pressing part (34) capable of pressing the top packaging of the two vertical plates (21) is fixed on the fixing block (33). An output shaft (321) is fixed on the power component (32). A connecting component (4) connecting the crossbar (31) and the output shaft (321) is provided above the base (1). The power component (32) can drive the crossbar (31), the fixing block (33) and the negative pressure suction cup (35) to rotate around the output shaft (321) through the connecting component (4). When the negative pressure suction cup (35) rotates downward, it clamps the uppermost packaging bag. When it rotates upward, the pressing part (34) presses the upper side of the uppermost packaging bag to make it bend.

2. The bag feeding mechanism of a bag-feeding packaging machine according to claim 1, characterized in that, The connecting member (4) includes a linkage plate (41), a transmission rod (42) fixed on the outer periphery of the output shaft (321), and a connecting rod (43) fixedly connected to the end of the transmission rod (42) away from the output shaft (321); the end of the connecting rod (43) away from the transmission rod (42) is rotatably connected to one end of the linkage plate (41); An extrusion rod (44) located above the connecting rod (43) is rotatably sleeved on the outer periphery of the output shaft (321). An elastic element (45) that drives the extrusion rod (44) to rotate downward is provided above the base (1). A connecting shaft (441) that is rotatably connected to the middle of the linkage plate (41) is fixed on the extrusion rod (44). The end of the crossbar (31) near the output shaft (321) is fixedly connected to the end of the linkage plate (41) away from the connecting rod (43). A limiting wheel (442) is fixed on the bottom surface of the extrusion rod (44), and a limiting protrusion (12) located below the limiting wheel (442) is fixed on the upper part of the base (1); the axes of the crossbar (31), the output shaft (321) and the connecting shaft (441) are parallel to each other; the power component (32) drives the extrusion rod (44) and the crossbar (31) to rotate around the axis of the output shaft (321), and the output shaft (321) drives the crossbar (31) to rotate around the axis of the connecting shaft (441) when the limiting wheel (442) and the upper surface of the limiting protrusion (12) are pressed together.

3. The bag feeding mechanism of a bag-feeding packaging machine according to claim 1, characterized in that, A limiting gap is provided between the barrier plate (22) and the vertical plate (21). A pressing rod (25) located within the limiting gap is rotatably installed on the barrier plate (22). The pressing rod (25) is used to limit the side edge of the uppermost packaging bag near the barrier plate (22). The barrier plate (22) is fixed with a proximity switch (26) located below the pressing rod (25) and capable of controlling the operation of the power component (32). After the negative pressure suction cup (35) picks up the uppermost packaging bag, the pressing rod (25) rotates downward and abuts against the upper surface of the proximity switch (26). When the lifting plate (23) moves upward, the pressing rod (25) can rotate upward and separate from the upper surface of the proximity switch (26).

4. The bag feeding mechanism of a bag-feeding packaging machine according to claim 1, characterized in that, The limiting member (6) includes a limiting rod (61) that slides on the inner walls of the two vertical plates (21) close to each other. The installation direction of the limiting rod (61) is perpendicular to the upper surface of the lifting plate (23), and the sliding direction is parallel to the upper surface of the lifting plate (23). The outside of the vertical plate (21) is provided with a locking member (62) to fix the sliding state of the limiting rod (61).

5. The bag feeding mechanism of a bag-feeding packaging machine according to claim 4, characterized in that, The locking component (62) includes a locking bolt (621), a locking plate (622) located on the side away from each other of the two vertical plates (21), and a side locking block (623) located on the side close to each other of the two vertical plates (21). The upper part of the vertical plate (21) is provided with a guide groove (211) whose length direction is parallel to the upper side of the lifting plate (23). The bottom surface of the locking block (623) is fixedly connected to the upper end of the limiting rod (61). The locking block (623) is fixedly provided with a locking protrusion (6231) that slides into the guide groove (211). The locking protrusion (6231) is provided with a locking screw hole. The locking plate (622) is provided with a locking through hole. The locking bolt (621) can be screwed into the locking screw hole after passing through the locking through hole.

6. The bag feeding mechanism of a bag-feeding packaging machine according to claim 1, characterized in that, An inclined support platform (13) is fixed on the upper surface of the base (1). The upper surface of the support platform (13) is parallel to the upper surface of the lifting plate (23). The bottom side of the barrier plate (22) is fixedly connected to the upper surface of the support platform (13). An adjusting member (5) capable of adjusting the distance between the two vertical plates (21) is provided on the support platform (13).

7. The bag feeding mechanism of a bag-feeding packaging machine according to claim 6, characterized in that, The adjusting component (5) includes an adjusting screw (51) rotatably mounted on the support platform (13) and an adjusting block (52) fixed on the bottom side of the vertical plate (21). The adjusting block (52) is slidably mounted on the upper side of the support platform (13), and the two adjusting blocks (52) can slide back and forth along the length direction of the adjusting screw (51). One end of the adjusting screw (51) is fixed with a handwheel (511). The outer circumferences of the two ends of the adjusting screw (51) are respectively threaded parts with opposite directions of rotation. The two adjusting blocks (52) are provided with adjusting screw holes for the adjusting screw (51) to be screwed in and pass through. When the adjusting screw (51) rotates, it drives the two adjusting blocks (52) to slide towards each other and away from each other.

8. The bag feeding mechanism of a bag-feeding packaging machine according to claim 6, characterized in that, The fixing block (33) can slide back and forth along the length of the crossbar (31). The pressing part (34) has a limiting notch (341) on the side facing the base (1) for the upper edge of the vertical plate (21) to be inserted. When the pressing part (34) rotates, the upper edge of the vertical plate (21) rotates synchronously relative to the limiting notch (341).

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