Bag opening structure of packing machine

Abstract

The bag opening structure comprises a feeding bin and two bag openers, the feeding bin is provided with a feeding port, the lower portion of the feeding bin is provided with a discharging port, the two bag openers are arranged on the two sides of the feeding bin respectively, each bag opener comprises a bag opening cylinder body, a connecting piece and a suction cup, and the bag opening cylinder body is arranged on one side of the feeding bin; the output ends of the bag opening cylinder bodies are connected with the connecting piece, the suction cups are arranged on the side, facing the lower portion of a discharging port of the feeding bin, of the connecting piece, the two bag opening cylinder bodies drive the two suction cups to be close to or away from each other, and the two bag opening cylinder bodies are arranged on the two sides of the feeding bin, so that compared with an existing cylinder body arrangement mode, the transverse space layout is reduced, and the space arrangement efficiency is improved. The output end of the bag opening cylinder body is connected with the connecting piece, the sucking disc is arranged on the connecting piece, the installing position of the sucking disc can be adjusted by additionally arranging one connecting piece, and the situation that in the prior art, the sucking disc is directly installed at the output end of the cylinder body, and interference is likely to happen is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of packaging machine technology, specifically relating to a bag opening structure for a packaging machine. Background Technology

[0002] A baler is an automatic bag opening, filling, and sealing device. Existing balers generally use two methods for opening bags: one is by inserting a fork into the bag opening and moving it to the sides; the other is by using suction cups to hold the bag's sides and moving it outwards. In suction cup-based opening, cylinders are typically installed on both sides of the discharge port, with the cylinders directly driving the suction cups. This installation method has a problem: it occupies a large amount of space, and the suction cup air inlet hose is difficult to install, easily causing interference. Therefore, this solution was developed. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a bag opening structure for a packaging machine with a reasonable layout.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a bag opening structure for a packaging machine, including a feeding bin and two sets of bag openers. The feeding bin has a feeding port on the top and a discharging port at the bottom. The two sets of bag openers are respectively arranged on both sides of the feeding bin. Each bag opener includes a bag opening cylinder, a connecting piece, and a suction cup. The bag opening cylinder is arranged on one side of the feeding bin, and the output end of the bag opening cylinder is connected to the connecting piece. The suction cup is arranged on the side of the connecting piece facing the discharging port of the feeding bin below. The two bag opening cylinders drive the two suction cups to move closer or further apart.

[0005] Furthermore, the suction cup includes a suction head and an air inlet pipe, the air inlet pipe being fixedly connected to the connector and its output end extending out of the side wall of the connector.

[0006] Furthermore, a pressure sensor is installed inside the intake pipe.

[0007] Furthermore, connecting plates are provided on both sides of the feeding hopper, and the two bag-opening cylinders are located between the two connecting plates and fixed to different connecting plates. The output ends of the two bag-opening cylinders face opposite directions. Guide holes are provided on the connecting plates, and the connecting piece is connected to the output end of the bag-opening cylinder through an adapter extension plate. Guide posts are formed on the surface of the adapter extension plate, and the guide posts extend into the guide holes for sliding connection.

[0008] Furthermore, the bag opening structure also includes a flattening assembly. Connecting plates are provided on both sides of the feeding hopper. The flattening assembly includes a first drive cylinder, a U-shaped synchronous plate, two first connecting rods, two second connecting rods, and a flattening strip. The first drive cylinder is located on the outside of any connecting plate. The output end of the first drive cylinder is connected to the surface of the U-shaped synchronous plate. The short sides of both sides of the U-shaped synchronous plate are hinged to one end of the first connecting rod, and the other end of the first connecting rod is hinged to one end of the second connecting rod. The flattening strip is connected to the bottom surface of the two second connecting rods.

[0009] Furthermore, the flattening assembly also includes two L-shaped adapter plates, which are respectively connected to the lower side of the second connecting rod, and the flattening strip is connected to the lower surface of the two L-shaped adapter plates.

[0010] Furthermore, a magnetic ring is provided at the end of the bag-opening cylinder.

[0011] Furthermore, the bag opening structure also includes a bag clamping assembly, which includes two bag clamps. The two bag clamps are respectively arranged on both sides of the discharge port of the feed hopper, and the clamping direction of the output end of the two bag clamps is the same as the moving direction of the suction cup in the bag opener.

[0012] Furthermore, the bag clamp includes a second drive cylinder, a mounting base, two mounting plates, and a left gripper and a right gripper. The second drive cylinder is disposed on the upper surface of the mounting base and its output end passes through the lower surface of the mounting base. The output end of the second drive cylinder is connected to two spaced-apart columns. The two mounting plates are disposed on the lower surface of the mounting base and are spaced apart. The left gripper and the right gripper are hinged between the two mounting plates. A reset component is provided at the hinge point between the left gripper and the right gripper and the mounting plate. An arc-shaped notch is formed on the side of the left gripper and the right gripper facing each other, and the arc-shaped notch is adapted to the column.

[0013] Furthermore, connecting plates are provided on both sides of the feeding hopper, and mounting columns are provided between the two sides of the two connecting plates. Extension plates are formed on both sides of the upper surface of the mounting base, and connecting holes are provided at the upper ends of the extension plates, through which the mounting columns pass.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This utility model sets two bag-opening cylinders on both sides of the feeding hopper. Compared with the existing cylinder arrangement, it reduces the horizontal space layout. The output end of the bag-opening cylinder is connected to a connector with a suction cup. By adding a connector, the installation position of the suction cup can be adjusted, and there is no interference problem caused by directly installing the suction cup at the output end of the cylinder in the existing technology.

[0016] 2. The bag opening structure of this solution is also equipped with a flattening component. After the bag is filled, the bag opening will be in a relatively uneven state, which makes it difficult to seal. This solution uses the first drive cylinder to drive the U-shaped synchronous rod to push out, which drives the first connecting rod and the second connecting rod to rotate, ultimately driving the flattening strip to press the bag opening laterally, making the bag opening flat and facilitating subsequent sealing. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the bag-opening structure of a packaging machine according to the present invention;

[0018] Figure 2 This is a three-dimensional structural diagram of the present invention from another perspective;

[0019] Figure 3 This is a top view of the structure of the hidden feed hopper in this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the bag clamping assembly in this utility model;

[0021] Figure 5 This is a front view of the bag clamping assembly of this utility model after the mounting plate is hidden.

[0022] Figure 6 This is a three-dimensional structural diagram of the pressure flattening component in this utility model.

[0023] The diagram shows the following markings: 1. Feed hopper; 11. Connecting plate; 12. Mounting column; 2. Bag opener; 21. Bag opening cylinder; 211. Magnetic ring; 22. Connector; 221. Adapter extension plate; 222. Guide column; 23. Suction cup; 231. Suction head; 232. Air inlet pipe; 3. Flattening assembly; 31. First drive cylinder; 32. U-shaped synchronization plate; 33. First connecting rod; 34. Second connecting rod; 35. L-shaped adapter plate; 36. Flattening strip; 4. Bag clamping assembly; 41. Second drive cylinder; 411. Column; 42. Mounting base; 421. Extension plate; 43. Mounting plate; 44. Left gripper; 45. Right gripper; 46. Arc-shaped notch. Detailed Implementation

[0024] To make the above-mentioned features and advantages of this utility model more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings for detailed explanation.

[0025] like Figures 1-6 As shown, this embodiment provides a bag opening structure for a packaging machine, including a feeding bin 1, two sets of bag openers 2, a flattening assembly 3, and a bag clamping assembly 4.

[0026] The feeding hopper 1 has a feed inlet at the top and a discharge outlet at the bottom. Connecting plates 11 are installed at the front and rear of the feeding hopper 1. Two sets of bag openers 2 are respectively installed on both sides of the feeding hopper 1. Specifically, each bag opener 2 includes a bag opening cylinder 21, a connecting piece 22, and suction cups 23. The bag opening cylinder 21 can be a pneumatic cylinder, an electric cylinder, or a hydraulic cylinder. The connecting piece 22 is a square tube. The two bag opening cylinders 21 are located between two connecting plates 11 and are fixed to different connecting plates 11. A magnetic ring 211 is installed at the end of each bag opening cylinder 21. The output ends of the two bag opening cylinders 21 face opposite directions and are connected to the connecting piece 22. The two bag opening cylinders 21 drive the two suction cups 23 to move closer or further apart. Preferably, the connector 22 is connected to the output end of the bag opening cylinder 21 via the adapter extension plate 221. The connector 11 is provided with a guide hole, and the surface of the adapter extension plate 221 is formed with a guide post 222. The guide post 222 extends into the guide hole and is slidably connected. The suction cup 23 is located on the side of the connector 22 facing the discharge port of the feed hopper 1. The suction cup 23 includes a suction head 231 and an air inlet pipe 232. The air inlet pipe 232 is fixedly connected to the connector 22 and its output end extends out of the side wall of the connector 22. A pressure sensor is provided in the air inlet pipe 232.

[0027] Working principle of bag opener 2: The bag is transported to the bottom of the discharge port by the external bag upper assembly and clamped by the bag clamping assembly 4. The output end of the bag opening cylinder 21 retracts, which drives the two connecting parts 22 to move closer to each other, so that the suction heads 231 of the two suction cups 23 are attached to the two sides of the bag. Then the air inlet pipe 232 draws air, the suction heads 231 adsorb the surface of the bag, and the output end of the bag opening cylinder 21 pushes out, which drives the two connecting parts 22 to move away from each other, thereby realizing the opening of the bag.

[0028] The flattening assembly 3 includes a first drive cylinder 31, a U-shaped synchronous plate 32, two first connecting rods 33, two second connecting rods 34, two L-shaped adapter plates 35, and a flattening strip 36. The first drive cylinder 31 can be a pneumatic cylinder, a hydraulic cylinder, or an electric cylinder. The first drive cylinder 31 is located on the outside of any connecting plate 11. The output end of the first drive cylinder 31 is connected to the surface of the U-shaped synchronous plate 32. The short sides on both sides of the U-shaped synchronous plate 32 are hinged to one end of the first connecting rod 33, and the other end of the first connecting rod 33 is hinged to one end of the second connecting rod 34. The two L-shaped adapter plates 35 are respectively connected to the lower side of the second connecting rod 34. The flattening strip 36 is connected to the lower surface of the two L-shaped adapter plates 35.

[0029] The working principle of the flattening component 3: When the bag is filled with material, the suction cups 23 come together and then the air is cut off. The two suction cups 23 move away from each other, and the first drive cylinder 31 drives the U-shaped synchronous rod to push out, which drives the first connecting rod 33 and the second connecting rod 34 to rotate. Finally, the flattening strip 36 is driven to press the bag opening sideways, making the bag opening side flat and convenient for subsequent sealing.

[0030] The bag clamping assembly 4 includes two bag clamps, which are respectively located on both sides of the discharge port of the feed hopper 1. The clamping direction of the output end of the two bag clamps is the same as the moving direction of the suction cup 23 in the bag opener 2. Specifically, the bag clamp includes a second drive cylinder 41, a mounting base 42, two mounting plates 43, a left gripper 44, and a right gripper 45. The second drive cylinder 41 is located on the upper surface of the mounting base 42 and its output end passes through the lower surface of the mounting base 42. The output end of the second drive cylinder 41 is connected to two spaced columns 411. The two mounting plates 43 are located on the lower surface of the mounting base 42 and are spaced apart. The left gripper 44 and the right gripper 45 are hinged between the two mounting plates 43. A reset component is provided at the hinge point between the left gripper 44 and the right gripper 45 and the mounting plate 43. An arc-shaped notch 46 is formed on the side of the left gripper 44 and the right gripper 45 facing each other. The arc-shaped notch 46 is adapted to the column 411.

[0031] Preferably, a mounting post 12 is provided between the two sides of the two connecting plates 11, and two extension plates 421 are formed on both sides of the upper surface of the mounting base 42. A connecting hole is provided at the upper end of the extension plate 421, and the mounting post 12 passes through the connecting hole.

[0032] Working principle of bag clamping assembly 4: The bag is transported to the bottom of the discharge port by the external upper bag assembly. At this time, the two sides of the bag opening will be located between the two sets of left clamps 44 and right clamps 45 respectively. The second drive cylinder 41 is in the ejected state at the output end when the left clamps 44 and right clamps 45 are open. The output end of the second drive cylinder 41 retracts, causing the two columns 411 to retract and be inserted into the two arc-shaped notches 46. Under the action of the torsion spring, the left clamps 44 and right clamps 45 move closer to each other to clamp the two sides of the bag. It is worth noting that after clamping, a tray (not shown in this solution) is set under the bag for load bearing. The bag clamping assembly 4 is mainly used to fix the position of the bag opening.

[0033] The foregoing has shown and described the basic principles and main features of this invention, as well as its advantages. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this invention. Various changes and modifications can be made to this invention without departing from its spirit and scope. All such changes and modifications fall within the scope of this invention as defined by the appended claims and their equivalents.

Claims

1. An opening bag structure of a packaging machine, characterized by: The device includes a feeding hopper and two sets of bag openers. The feeding hopper has a feed inlet on top and a discharge outlet at the bottom. The two sets of bag openers are respectively arranged on both sides of the feeding hopper. Each bag opener includes a bag opening cylinder, a connector, and a suction cup. The bag opening cylinder is located on one side of the feeding hopper, and its output end is connected to the connector. The suction cup is located on the side of the connector facing the discharge outlet of the feeding hopper. The two bag opening cylinders drive the two suction cups to move closer or further apart.

2. A bag opening structure of a packaging machine according to claim 1, characterized in that: The suction cup includes a suction head and an air inlet pipe, the air inlet pipe being fixedly connected to a connector and the output end extending through the side wall of the connector.

3. A bag opening structure of a packaging machine according to claim 2, characterized in that: A pressure sensor is installed inside the air intake pipe.

4. The bag opening structure of a packing machine according to claim 1, characterized in that: Connecting plates are provided on both sides of the feeding hopper. The two bag-opening cylinders are located between the two connecting plates and fixed to different connecting plates. The output ends of the two bag-opening cylinders face opposite directions. Guide holes are provided on the connecting plates. The connecting piece is connected to the output end of the bag-opening cylinder through an adapter extension plate. Guide posts are formed on the surface of the adapter extension plate. The guide posts extend into the guide holes and slide.

5. The bag opening structure of a packing machine according to claim 1, characterized in that: The bag opening structure also includes a flattening assembly. Connecting plates are provided on both sides of the feeding hopper. The flattening assembly includes a first drive cylinder, a U-shaped synchronous plate, two first connecting rods, two second connecting rods, and a flattening strip. The first drive cylinder is located on the outside of any connecting plate. The output end of the first drive cylinder is connected to the surface of the U-shaped synchronous plate. The short sides of both sides of the U-shaped synchronous plate are hinged to one end of the first connecting rod, and the other end of the first connecting rod is hinged to one end of the second connecting rod. The flattening strip is connected to the bottom surface of the two second connecting rods.

6. A bag opening structure of a packaging machine according to claim 5, characterized in that: The flattening assembly also includes two L-shaped adapter plates, which are connected to the lower side of the second connecting rod, and the flattening strip is connected to the lower surface of the two L-shaped adapter plates.

7. The bag opening structure of a packing machine according to claim 4, characterized in that: A magnetic ring is provided at the end of the bag-opening cylinder.

8. The bag opening structure of a packing machine according to claim 1, characterized in that: The bag opening structure also includes a bag clamping assembly, which includes two bag clamps. The two bag clamps are respectively arranged on both sides of the discharge port of the feed hopper, and the clamping direction of the output end of the two bag clamps is the same as the moving direction of the suction cup in the bag opener.

9. A bag opening structure of a packaging machine according to claim 8, characterized in that: The bag clamp includes a second drive cylinder, a mounting base, two mounting plates, and a left gripper and a right gripper. The second drive cylinder is disposed on the upper surface of the mounting base and its output end passes through the lower surface of the mounting base. The output end of the second drive cylinder is connected to two spaced-apart columns. The two mounting plates are disposed on the lower surface of the mounting base and are spaced apart. The left gripper and the right gripper are hinged between the two mounting plates. A reset component is provided at the hinge point between the left gripper and the right gripper and the mounting plate. An arc-shaped notch is formed on the side of the left gripper and the right gripper facing each other, and the arc-shaped notch is adapted to the column.

10. A bag opening structure of a packaging machine according to claim 9, characterized in that: The feed hopper is provided with connecting plates on both sides, and a mounting column is provided between the two sides of the two connecting plates. An extension plate is formed on both sides of the upper surface of the mounting base, and a connecting hole is provided at the upper end of the extension plate. The mounting column passes through the connecting hole.

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