The opening mechanism of soft-handled packaging bags

Abstract

This utility model relates to a bag-opening mechanism for soft-handle packaging bags. The bag-opening mechanism includes a bag-opening cylinder mounting plate and two bag-opening assemblies symmetrically arranged below the bag-opening cylinder mounting plate. Each bag-opening assembly has a lifting handle cylinder assembly in the middle. When the soft-handle packaging bag is raised and positioned between the two bag-opening assemblies, the lifting handle cylinder assembly extends to block the soft handle, so that the bag-opening assembly can avoid the soft handle when sucking in the bag. This utility model has a simple structure, reasonable design, and is easy to use. During the bag-opening process, it can prevent the soft handle of the soft-handle packaging bag from shifting and affecting the bag opening operation, while ensuring that the soft-handle packaging bag can be smoothly conveyed and filled.

Description

Technical Field

[0001] This utility model relates to a bag-opening mechanism for a soft-handle packaging bag. Background Technology

[0002] Currently, common rice packaging bags include snap-on bags and ordinary laminated woven bags. Therefore, conventional semi-automatic or fully automatic packaging machines are designed around these two types of bags. In existing technology, while fully automatic rice packaging equipment is relatively mature, it is not compatible with soft-handle bags when using them for packaging. To open the bag and facilitate filling with material, it's crucial to prevent the soft handles from shifting during the opening process, thus ensuring smooth transport of the bag. This design addresses this issue. Utility Model Content

[0003] This invention addresses the aforementioned problems by providing a bag-opening mechanism for a soft-handle packaging bag. This mechanism is simple in structure and easy to use, facilitating smooth opening of the bag and reducing the impact of the soft handle.

[0004] This utility model is constructed as follows: it includes a bag-opening cylinder mounting plate and two bag-opening assemblies arranged symmetrically below the bag-opening cylinder mounting plate. Each bag-opening assembly has a lifting handle cylinder assembly in the middle. Before the soft handle packaging bag rises and is between the two bag-opening assemblies, the lifting handle cylinder assembly extends to block the soft handle, so that the bag-opening assembly can avoid the soft handle when sucking up the bag.

[0005] Furthermore, the bag-opening assembly includes a bag-opening cylinder mounted on a bag-opening cylinder mounting plate, a bag-opening drive frame is provided at the output end of the bag-opening cylinder, and a bag-opening suction cup assembly is provided at the lower part of the bag-opening drive frame.

[0006] Furthermore, the lever cylinder assembly is tilted.

[0007] Furthermore, the lever cylinder assembly includes a lever cylinder mounting plate and a lever cylinder disposed on the lever cylinder mounting plate. The output end of the lever cylinder is provided with a lever stop block, and the inner side of the lever stop block is provided with a lever baffle to block the lever of the soft-handle packaging bag.

[0008] Furthermore, a bag clamping auxiliary arm is provided on the side of the bag feeding end of the bag-holding cylinder mounting plate near the soft handle, and a bag clamping auxiliary plate is provided on the lower side of the bag clamping auxiliary arm.

[0009] Furthermore, a bag-opening mechanism mounting frame is provided above the bag-opening cylinder mounting plate.

[0010] Furthermore, a bag-shifting mechanism is provided below the bag-opening mechanism; the bag-shifting mechanism includes two symmetrically arranged bag-shifting machine bases and a bag-shifting upper mounting plate disposed on each bag-shifting machine base. The bag-shifting upper mounting plate is connected to the bag-shifting machine base via a bag-shifting sliding assembly. The front and rear parts of the bag-shifting upper mounting plate are respectively provided with a bag-supporting mounting base and a bag-pulling and bag-clamping cylinder assembly. A bag-fitting lifting cylinder is installed inside the bag-supporting mounting base. A bag-supporting lifting transition plate is installed on the upper output shaft of the bag-fitting lifting cylinder. A front bag-clamping cylinder assembly, a bag-supporting plate assembly, and a rear bag-clamping cylinder assembly are arranged sequentially from front to back on the bag-supporting lifting transition plate.

[0011] Furthermore, the front bag clamping cylinder assembly includes a front bag clamping cylinder and two front bag clamping bodies disposed on the inner output ends of the front bag clamping cylinder. The two front bag clamping bodies can rotate relative to each other to clamp or rotate away from each other to separate. Each front bag clamping body is provided with a front bag opening guard plate on its exterior. The bag support plate assembly includes a bag support plate and a bag support plate lifting cylinder for driving the bag support plate to rise and fall. The bag support plate includes a bag support connecting arm and an L-shaped bag support bracket connected to the inner side of the bag support connecting arm. The rear bag clamping cylinder assembly includes a rear bag clamping cylinder and two rear bag clamping bodies disposed on the inner output ends of the rear bag clamping cylinder. The two rear bag clamping bodies can rotate relative to each other to clamp or rotate away from each other to separate. Each rear bag clamping body is provided with a rear bag opening guard plate on its exterior.

[0012] Furthermore, the bag-clamping cylinder assembly includes a bag-clamping base and a clamping cylinder assembly disposed on the bag-clamping base. The clamping cylinder assembly includes a clamping sliding plate and a clamping cylinder disposed on the clamping sliding plate. The output end of the clamping cylinder is provided with two clamping opening and closing bodies, and a clamping guard plate is installed on the clamping opening and closing body. A bag-clamping electric cylinder for driving the clamping cylinder assembly to move left and right is installed on the outside of the bag-clamping base. The telescopic shaft of the bag-clamping electric cylinder is hinged to the clamping cylinder assembly. The bag-clamping base and the clamping sliding plate are connected by a bag-clamping sliding assembly. The bag-clamping sliding assembly includes a bag-clamping slide rail disposed on the bag-clamping base and a bag-clamping slider disposed below the bag-clamping sliding plate. The bag-clamping slide rail and the bag-clamping slider are slidably engaged.

[0013] Furthermore, the bag transfer sliding assembly includes a bag transfer slide rail disposed on the bag transfer opening machine base and a bag transfer slider disposed below the bag transfer upper mounting plate, wherein the bag transfer slide rail and the bag transfer slider are slidably engaged; the bag transfer opening machine base is provided with an engineering drag chain, one end of which is fixed to the bag transfer opening machine base and the other end is fixed to the bag transfer upper mounting plate; the bag transfer upper mounting plate is provided with a linkage block, which is driven by the bag transfer driving device to move the entire bag transfer upper mounting plate forward and backward along the bag transfer slide rail.

[0014] Compared with existing technologies, this utility model has the following advantages: The device has a simple structure, reasonable design, and is easy to use. By conveying the soft-handled packaging bag to below the bag-opening station, during the process of the bag rising to the opening station, the handle cylinders on both sides drive the handle baffles to extend towards the soft-handled packaging, blocking the soft handle and preventing it from moving upwards, thus keeping it hanging down and preventing it from interfering with the operation of the bag-opening suction cup assembly. Once the soft-handled packaging bag is fully in the opening station, the bag-opening cylinder drives the bag-opening drive frame and the bag-opening suction cup assembly to extend. The suction cup assembly then adheres to both sides of the bag opening. Finally, the bag-opening cylinder retracts, opening the soft-handled packaging bag. Furthermore, a bag-shifting mechanism ensures smooth movement of the soft-handled packaging bag. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the bag-opening mechanism in an embodiment of the present utility model;

[0016] Figure 2 The three-dimensional structure of the bag-opening mechanism in this embodiment of the utility model Figure 1 ;

[0017] Figure 3 The three-dimensional structure of the bag-opening mechanism in this embodiment of the utility model Figure 2 ;

[0018] Figure 4 This is a schematic diagram of the bag-transfer mechanism in an embodiment of the present invention. Figure 1 ;

[0019] Figure 5 This is a schematic diagram of the bag-transfer mechanism in an embodiment of the present invention. Figure 2 ;

[0020] Figure 6 This is a schematic diagram of the bag-opening mechanism and the bag-moving mechanism in an embodiment of this utility model;

[0021] Figure 7 This is a schematic diagram of the soft-handle packaging bag structure according to an embodiment of the present utility model;

[0022] Figure 8 This is a schematic diagram of the bag-holding mechanism and bag-patting mechanism in an embodiment of this utility model. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] Example 1: As Figure 1-8As shown, a bag-opening mechanism for a soft-handle packaging bag is provided. The bag-opening mechanism E includes a bag-opening cylinder mounting plate E1 and two bag-opening assemblies E2 arranged symmetrically below the bag-opening cylinder mounting plate. Each bag-opening assembly has a lifting handle cylinder assembly E3 in the middle. Before the soft-handle packaging bag is raised and positioned between the two bag-opening assemblies, the lifting handle cylinder assembly extends to block the soft handle, so that the bag-opening assembly can avoid the soft handle when sucking up the bag.

[0025] When the bag-opening mechanism is in place: Soft-handle packaging bag A3 is conveyed to the bottom of the bag-opening station. As the soft-handle packaging bag rises to the bag-opening station, the handle cylinders on both sides drive the handle baffles to extend towards the soft-handle packaging, blocking the soft handles and preventing them from moving upwards, keeping them drooping and preventing them from interfering with the operation of the bag-opening suction cup assembly. Once the soft-handle packaging bag is fully in the bag-opening station, the bag-opening cylinder drives the bag-opening drive frame and the bag-opening suction cup assembly to extend. The suction cup assembly then attaches to both sides of the opening of the soft-handle packaging bag. Finally, the bag-opening cylinder retracts, causing the soft-handle packaging bag to open.

[0026] It is worth noting that the bag clamping auxiliary plate helps to flatten the opening of the previous soft-handled packaging bag as it is about to enter the bag opening station. At the same time, the bag lifting cylinder of the bag moving mechanism descends, which drives the soft-handled packaging bag on the front bag clamping cylinder assembly to rise and fall synchronously, so that the soft handle can be pulled down to a hanging position.

[0027] In this embodiment of the utility model, the bag-opening assembly E2 includes a bag-opening cylinder E21 mounted on a bag-opening cylinder mounting plate E1. A bag-opening drive frame E22 is provided at the output end of the bag-opening cylinder. The bag-opening drive frame is arc-shaped, and a bag-opening suction cup assembly E23 is provided at the lower part of the bag-opening drive frame. The bag-opening suction cup assembly is existing technology. The bag-opening suction cup assembly includes two bag-opening negative pressure suction cups, a suction cup negative pressure pump, and a connecting pipeline. The suction cup negative pressure pump draws suction, causing the bag-opening negative pressure suction cups to generate suction force, thereby adhering to the soft handle packaging bag, and then opening the soft handle packaging bag.

[0028] In this embodiment of the utility model, the lever cylinder assembly E3 is inclined, and the lever cylinder assemblies on both sides are in an inverted V-shape; the angle between the lever cylinder assembly and the horizontal line can be 30-60 degrees.

[0029] In this embodiment of the utility model, the lever cylinder assembly E3 includes a lever cylinder mounting plate E31 and a lever cylinder E32 disposed on the lever cylinder mounting plate. The output end of the lever cylinder is provided with a handle stop block E33, and the inner side of the handle stop block is provided with a handle baffle E34 to block the handle of the soft handle packaging bag.

[0030] The aforementioned lever cylinder mounting plate can be fixed to the bag-opening cylinder mounting plate or to the bag-opening cylinder itself.

[0031] In this embodiment of the utility model, a bag clamping auxiliary arm E4 is provided on the side of the bag feeding end of the bag with soft handle on the bag mounting plate E1, and a bag clamping auxiliary plate E5 is provided on the lower side of the bag clamping auxiliary arm; the cross-section of the bag clamping auxiliary arm and the bag clamping auxiliary plate are both L-shaped.

[0032] In this embodiment of the utility model, a bag-opening mechanism mounting frame E6 is provided above the bag-opening cylinder mounting plate.

[0033] Example 2: Based on Example 1, in this embodiment of the present invention, a bag-shifting mechanism D is provided below the bag-opening mechanism; the bag-shifting mechanism is provided with a bag-opening station D16, a filling station D17 and a bag-guiding station D18 arranged sequentially from front to back in the middle of the bag-shifting mechanism. The bag-opening mechanism is located at the bag-opening station, and a filling device D19 for filling materials into the soft-handle packaging is provided at the filling station.

[0034] In this embodiment of the utility model, the bag-transferring mechanism D includes two symmetrically arranged bag-transferring machine bases D1 and a bag-transferring mounting plate D2 disposed on each bag-transferring machine base. The bag-transferring mounting plate is connected to the bag-transferring machine base via a bag-transferring sliding assembly D3. The front and rear parts of the bag-transferring mounting plate are respectively provided with a bag-supporting mounting base D4 and a bag-pulling and bag-clamping cylinder assembly D5. A bag-fitting lifting cylinder D6 is installed inside the bag-supporting mounting base D4. A bag-supporting lifting transition plate D10 is installed on the upper output shaft of the bag-fitting lifting cylinder. A front bag-clamping cylinder assembly D7, a bag-supporting plate assembly D8, and a rear bag-clamping cylinder assembly D9 are arranged sequentially from front to back on the bag-supporting lifting transition plate.

[0035] In this embodiment of the present invention, the front bag clamping cylinder assembly D7 includes a front bag clamping cylinder D71 and two front bag clamping bodies D72 disposed on the inner output end of the front bag clamping cylinder. The two front bag clamping bodies can rotate relative to each other to clamp or rotate in opposite directions to separate. Each front bag clamping body is provided with a front bag opening guard plate D73 on its exterior.

[0036] In this embodiment of the utility model, the bag support plate assembly D8 includes a bag support plate D81 and a bag support plate lifting cylinder D82 for driving the bag support plate to rise and fall. The bag support plate D81 includes a bag support connecting arm D811 and an L-shaped bag support bracket D812 connected to the inner side of the bag support connecting arm.

[0037] In this embodiment of the utility model, the rear bag clamping cylinder assembly D9 includes a rear bag clamping cylinder D91 and two rear bag clamping bodies D92 disposed on the inner output end of the rear bag clamping cylinder. The two rear bag clamping bodies can rotate relative to each other to clamp or rotate away from each other to separate. Each rear bag clamping body is provided with a rear bag opening guard plate D93 on its outside.

[0038] In this embodiment of the present invention, the bag-clamping cylinder assembly D5 includes a bag-clamping base D51 and a clamping cylinder assembly D52 disposed on the bag-clamping base. The clamping cylinder assembly D52 includes a clamping sliding plate D521 and a clamping cylinder D522 disposed on the clamping sliding plate. The output end of the clamping cylinder is provided with two clamping opening and closing bodies D523. A clamping guard plate D524 is installed on the clamping opening and closing body. A bag-clamping electric cylinder D525 for driving the clamping cylinder assembly to move left and right is installed on the outside of the bag-clamping base. The telescopic shaft of the bag-clamping electric cylinder is hinged to the clamping cylinder assembly. The bag-clamping base and the clamping sliding plate are connected by a bag-clamping sliding assembly. The bag-clamping sliding assembly includes a bag-clamping slide rail D526 disposed on the bag-clamping base and a bag-clamping slider D527 disposed below the bag-clamping sliding plate. The bag-clamping slide rail and the bag-clamping slider are slidably engaged.

[0039] In this embodiment of the utility model, the bag transfer sliding assembly D3 includes a bag transfer slide rail D31 disposed on the bag transfer mouth machine base and a bag transfer slider D32 disposed below the bag transfer upper mounting plate, wherein the bag transfer slide rail and the bag transfer slider are slidably engaged;

[0040] In this embodiment of the utility model, an engineering drag chain D11 is provided on the bag transfer machine base. One end of the engineering drag chain is fixed on the bag transfer machine base, and the other end is fixed on the bag transfer mounting plate.

[0041] In this embodiment of the utility model, a linkage block D12 is provided on the upper mounting plate of the pack transfer device. The linkage block is driven by the pack transfer drive device to move the entire upper mounting plate of the pack transfer device forward and backward along the pack transfer slide rail. The pack transfer drive device here includes, but is not limited to, a cylinder, a linear slide structure, and other drive devices.

[0042] In this embodiment of the utility model, the surface of the mounting plate on the transfer package is provided with a solenoid valve assembly D13.

[0043] In this embodiment of the utility model, a bag-holding mechanism D14 is provided below the bag-pulling and bag-clamping mechanism. The bag-holding mechanism includes two symmetrically arranged bag-holding plates D141, each of which is driven by a bag-holding electric cylinder D142 located on the outer side. The bag-holding mechanism can move forward and backward. A bag-holding base D143 is provided below the bag-holding mechanism. The bag-holding mechanism and the bag-holding base are connected by a bag-holding sliding component.

[0044] In this embodiment of the utility model, a bag-tapping mechanism D15 is provided below the filling station. The bag-tapping mechanism includes a bag-tapping plate D151 and a bag-tapping electric cylinder D152 for driving the bag-tapping plate to rise and fall.

[0045] In this embodiment of the utility model, when the bag-moving mechanism is working: when the soft-handled packaging bag is conveyed to the position of the front bag-clamping cylinder assembly of the bag-moving mechanism, the bag-feeding lifting cylinder rises, driving the upper mounting plate of the bag-moving mechanism and the front bag-clamping cylinder assembly to rise synchronously. Then, the front bag-clamping cylinder assembly clamps the two sides of the bag opening of the soft-handled packaging bag. Then, the bag-feeding lifting cylinder descends, driving the upper mounting plate of the bag-moving mechanism and the front bag-clamping cylinder assembly to descend synchronously. The upper mounting plate drives the front bag-clamping cylinder assembly to move towards the bag-opening station. When it moves to below the bag-opening station, the bag-feeding lifting cylinder rises, driving the soft-handled packaging bag to rise to the bag-opening station.

[0046] The pneumatic cylinder of the bag-opening mechanism drives the handle baffle to extend towards the soft handle packaging bag, so that the handle baffle blocks the soft handle of the soft handle packaging bag, preventing the soft handle from moving upward with the soft handle packaging bag and preventing the soft handle from affecting the bag-opening suction cup assembly's bag suction work. When the soft handle packaging bag is completely in the bag-opening station, the bag-opening cylinder drives the bag-opening drive frame and the bag-opening suction cup assembly to extend. The bag-opening suction cup assembly sucks on both sides of the opening of the soft handle packaging bag. Finally, the bag-opening cylinder retracts, causing the bag opening of the soft handle packaging bag to open.

[0047] After the bag opening mechanism opens the bag, the front bag clamping cylinder assembly releases the packaging bag. The upper mounting plate drives the front bag clamping cylinder assembly, the bag support plate assembly, and the rear bag clamping cylinder assembly to move forward synchronously. At this time, the rear bag clamping cylinder assembly and the bag support plate assembly are in the bag opening position. The bag support plate lifting cylinder of the bag support plate assembly retracts, driving the bag support plate to descend, so that the bag support plate is inserted into the bag opening of the soft handle packaging bag, and the rear bag clamping cylinder assembly clamps the soft handle packaging bag.

[0048] The upper mounting plate drives the rear bag clamping cylinder assembly and the bag support plate assembly to move backward to the filling station. The bag lifting cylinder rises, putting the bag opening of the soft handle packaging bag onto the filling port of the filling station, and fixing it through the filling bag clamping mechanism of the filling equipment (the filling bag clamping mechanism can be a pair of filling bag clamping bodies and a filling bag clamping electric cylinder to drive the opening and closing of the filling bag clamping bodies). Then, the soft handle packaging bag is filled with rice. In addition, during the filling process, the bag patting plate of the bag patting mechanism strikes the bottom of the soft handle packaging bag to make the filling more even.

[0049] The bag support plate lifting cylinder of the bag support plate assembly drives the bag support plate to rise upwards, avoiding the bag opening of the soft handle packaging bag; the rear bag clamping cylinder assembly releases; the upper mounting plate drives the rear bag clamping cylinder assembly, the bag support plate assembly, and the bag pulling and clamping cylinder assembly to move forward synchronously, so that the rear bag clamping cylinder assembly and the bag support plate assembly correspond to the bag opening station, while the bag pulling and clamping cylinder assembly corresponds to the filling station;

[0050] The bag clamping cylinder of the bag pulling and clamping cylinder assembly drives the two bag clamping opening and closing bodies to close and clamp the soft handle packaging bag filled with rice; the bag pulling cylinders on both sides push the bag clamping cylinder assembly to move away from the soft handle packaging bag, straightening the bag opening of the soft handle packaging bag.

[0051] Finally, the upper mounting plate drives the bag-pulling and clamping cylinder assembly and the soft-handle packaging bag to move backward. The bag-pulling and clamping cylinder assembly releases, transferring the soft-handle packaging bag to the next process, where the bag guiding mechanism continues to transport and package. When the soft-handle packaging bag is output from the filling station to the next process, the bag-holding plate of the lower bag-holding mechanism clamps the lower part of the soft-handle packaging bag and outputs it outward together synchronously.

[0052] It is worth noting that the above describes the working process of the bag-transfer mechanism for a single soft-handle packaging bag.

[0053] In actual operation, when the front clamping cylinder assembly conveys a soft-handled packaging bag to the bag opening station, the rear clamping cylinder assembly simultaneously conveys another soft-handled packaging bag that has already been successfully opened to the filling station for filling. The bag pulling and clamping cylinder assembly also simultaneously straightens the bag opening of the filled rice soft-handled packaging bag and outputs it to the bag guiding mechanism for the next process, such as conveying the bag, folding the bag opening, and sewing the bag.

[0054] When the front bag clamping cylinder assembly transports a soft-handled packaging bag to the position below the bag opening station, the bag lifting cylinder will drive the bag lifting transition plate to rise, causing the front bag clamping cylinder assembly and the rear bag clamping cylinder assembly to rise simultaneously. The soft-handled packaging bag on the front bag clamping cylinder assembly rises up and enters the bag opening station, where the bag opening mechanism unfolds the bag opening operation. The soft-handled packaging bag on the rear bag clamping cylinder assembly is at the filling station and also rises up to fit into the filling port of the filling station and be fixed.

[0055] Then the front bag clamping cylinder assembly and the rear bag clamping cylinder assembly reset again. The front bag clamping cylinder assembly then transports the new soft-handle packaging bag to the bag opening station, while the rear bag clamping cylinder assembly transports the soft-handle packaging bag to the filling station.

[0056] In this embodiment of the utility model, the soft-handle packaging bag A3 includes a bag body A31, an outer soft handle A32, and an inner soft handle A33.

[0057] Unless otherwise stated, if any of the technical solutions disclosed in this utility model discloses a numerical range, then the disclosed numerical range is a preferred numerical range. Any person skilled in the art should understand that the preferred numerical range is merely one among many feasible numerical values ​​that has a more obvious or representative technical effect. Because there are many numerical values, it is impossible to list them all. Therefore, this utility model discloses only some numerical values ​​to illustrate the technical solutions of this utility model. Furthermore, the numerical values ​​listed above should not constitute a limitation on the scope of protection of this utility model.

[0058] If the terms "first" or "second" are used in this document to specify components, those skilled in the art should know that the use of "first" or "second" is merely for the purpose of distinguishing components in description, and unless otherwise stated, the above terms have no special meaning.

[0059] Meanwhile, if the present invention discloses or relates to mutually fixedly connected parts or structural components, then unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, the mutually fixed connection can also be replaced by an integral structure (e.g., manufactured by casting process) (except where it is obviously impossible to use an integral forming process).

[0060] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in this utility model above include states or shapes that are similar to, close to, or approximate with them.

[0061] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A bag-opening mechanism for a soft-handle packaging bag, characterized in that, The bag-opening mechanism includes a bag-opening cylinder mounting plate and two bag-opening assemblies arranged symmetrically below the bag-opening cylinder mounting plate. Each bag-opening assembly has a lifting handle cylinder assembly in the middle. When the soft-handled packaging bag rises and is between the two bag-opening assemblies, the lifting handle cylinder assembly extends to block the soft handle, so that the bag-opening assembly can avoid the soft handle when sucking up the bag.

2. The bag opening mechanism of claim 1, wherein The bag-opening assembly includes a bag-opening cylinder mounted on a bag-opening cylinder mounting plate, a bag-opening drive frame at the output end of the bag-opening cylinder, and a bag-opening suction cup assembly at the lower part of the bag-opening drive frame.

3. The bag opening mechanism of claim 1, wherein The lever cylinder assembly is tilted.

4. The bag opening mechanism according to claim 1 or 3, wherein The lever cylinder assembly includes a lever cylinder mounting plate and a lever cylinder disposed on the lever cylinder mounting plate. The output end of the lever cylinder is provided with a lever stop block, and the inner side of the lever stop block is provided with a lever baffle to block the lever of the soft-handle packaging bag.

5. The bag opening mechanism of claim 1, wherein The bag-clamping cylinder mounting plate is provided with a bag-clamping auxiliary arm on the side near the soft handle bag feeding end, and a bag-clamping auxiliary plate is provided on the lower side of the bag-clamping auxiliary arm.

6. The bag opening mechanism of claim 1, wherein A bag-opening mechanism mounting frame is provided above the bag-opening cylinder mounting plate.

7. The bag opening mechanism of claim 1, wherein Below the bag opening mechanism is a bag transfer mechanism; the bag transfer mechanism includes two symmetrically arranged bag transfer bases and a bag transfer mounting plate on each bag transfer base. The bag transfer mounting plate is connected to the bag transfer base via a bag transfer sliding assembly. The front and rear parts of the bag transfer mounting plate are respectively provided with a bag support mounting base and a bag pulling and clamping cylinder assembly. A bag lifting cylinder is installed inside the bag support mounting base. A bag support lifting transition plate is installed on the upper output shaft of the bag lifting cylinder. A front clamping cylinder assembly, a bag support plate assembly, and a rear clamping cylinder assembly are arranged sequentially from front to back on the bag support lifting transition plate.

8. The bag opening mechanism of claim 7, wherein The front bag clamping cylinder assembly includes a front bag clamping cylinder and two front bag clamping bodies disposed on the inner output ends of the front bag clamping cylinder. The two front bag clamping bodies can rotate relative to each other to clamp or rotate away from each other to separate. Each front bag clamping body is provided with a front bag opening guard plate on its exterior. The bag support plate assembly includes a bag support plate and a bag support plate lifting cylinder for driving the bag support plate to rise and fall. The bag support plate includes a bag support connecting arm and an L-shaped bag support bracket connected to the inner side of the bag support connecting arm. The rear bag clamping cylinder assembly includes a rear bag clamping cylinder and two rear bag clamping bodies disposed on the inner output ends of the rear bag clamping cylinder. The two rear bag clamping bodies can rotate relative to each other to clamp or rotate away from each other to separate. Each rear bag clamping body is provided with a rear bag opening guard plate on its exterior.

9. The bag opening mechanism of claim 7, wherein The bag-clamping cylinder assembly includes a bag-clamping base and a clamping cylinder assembly mounted on the bag-clamping base. The clamping cylinder assembly includes a clamping sliding plate and a clamping cylinder mounted on the clamping sliding plate. The output end of the clamping cylinder is provided with two clamping opening and closing bodies, and a clamping guard plate is installed on the clamping opening and closing bodies. A bag-clamping electric cylinder for driving the clamping cylinder assembly to move left and right is installed on the outside of the bag-clamping base. The telescopic shaft of the bag-clamping electric cylinder is hinged to the clamping cylinder assembly. The bag-clamping base and the clamping sliding plate are connected by a bag-clamping sliding assembly. The bag-clamping sliding assembly includes a bag-clamping slide rail mounted on the bag-clamping base and a bag-clamping slider mounted below the bag-clamping sliding plate. The bag-clamping slide rail and the bag-clamping slider are slidably engaged.

10. The bag opening mechanism of claim 7, wherein The bag transfer sliding assembly includes a bag transfer slide rail disposed on the bag transfer opening machine base and a bag transfer slider disposed below the bag transfer upper mounting plate, wherein the bag transfer slide rail and the bag transfer slider are slidably engaged; the bag transfer opening machine base is provided with an engineering drag chain, one end of which is fixed to the bag transfer opening machine base and the other end is fixed to the bag transfer upper mounting plate; the bag transfer upper mounting plate is provided with a linkage block, which is driven by the bag transfer drive device to move the entire bag transfer upper mounting plate forward and backward along the bag transfer slide rail.

Images