Automatic weighing machine for plastic product packaging

Abstract

The utility model provides a kind of automatic weighing machine for plastic product packaging, belong to weighing packaging equipment technical field.It include weighing machine host, the bottom of weighing machine host is fixedly connected with bottom plate, support plate is fixedly connected on the outer wall of bottom plate near weighing machine host side, support plate is fixedly connected with top plate at one end away from bottom plate, the middle outer wall of top plate is equipped with the avoidance slot, the outer wall of top plate top near the both sides of avoidance slot is symmetrically equipped with first sliding slot, the outer wall of top plate top near first sliding slot is equipped with second sliding slot, the inner wall of first sliding slot near second sliding slot side is equipped with first connecting groove, the inner wall of first sliding slot away from second sliding slot side is equipped with rotating groove;Auxiliary assembly is used to assist fixed packaging bag, auxiliary assembly is connected with bottom plate and top plate respectively.By setting auxiliary assembly, bag mouth can be quickly opened and fixed, it is convenient to take bag after discharging, significantly improve work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of weighing and packaging equipment technology, and in particular to an automatic weighing machine for packaging plastic products. Background Technology

[0002] Automatic weighing machines for plastic product packaging are automated equipment specifically designed for the production and packaging of plastic products. Their core function is to perform high-precision weight detection, counting, or proportioning of plastic products before final packaging (such as boxing or bagging).

[0003] Currently, after producing plastic products (such as small plastic ball toys), small factories typically use small automatic weighing machines to weigh or count the materials. The weighed materials are then manually sealed in packaging bags. During this process, workers need to hold the bag opening and place it at the weighing machine's inlet to receive the material. When the pre-packaged material is large or heavy, unloading takes time, requiring workers to maintain the bag-holding posture for an extended period. This not only increases the difficulty of the work but also hinders efficiency. Therefore, this invention provides an automatic weighing machine for plastic product packaging to meet this need. Utility Model Content

[0004] The technical problem this utility model aims to solve is to provide an automatic weighing machine for plastic product packaging. By setting auxiliary components, it can not only quickly open and fix the bag opening, but also quickly release the limiting and fixing of the bag after feeding, making it easy to remove the bag quickly and improving the work efficiency of the workers. In addition, it can limit the two sides of the bag during feeding to prevent the material from hitting the inner wall of the bag and causing the bag to tip over, thus solving the problem of low work efficiency.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: An automatic weighing machine for plastic product packaging includes a weighing machine main unit, a base plate fixedly connected to the bottom of the weighing machine main unit, a support plate fixedly connected to the outer wall of the base plate near the weighing machine main unit, a top plate fixedly connected to the end of the support plate away from the base plate, an clearance groove formed on the middle outer wall of the top plate, first sliding grooves symmetrically formed on the outer walls of the top of the top plate near the clearance grooves on both sides, a second sliding groove formed on the outer wall of the top of the top plate near the first sliding grooves, a first connecting groove formed on the inner wall of the first sliding groove near the second sliding groove, and a rotating groove formed on the inner wall of the first sliding groove away from the second sliding groove; and an auxiliary component for assisting in fixing the packaging bag, the auxiliary component being connected to the base plate and the top plate respectively.

[0006] Optionally, the auxiliary component includes a first connecting post, a first fixing post, and a toothed post. One end of the first connecting post is fixedly connected to the outer wall of the bottom of the top plate near the first sliding groove. The toothed post is slidably connected to the inner wall of the second sliding groove. The first fixing post is fixedly connected to the outer wall of the top of the bottom plate near one side.

[0007] Optionally, an abutting post is fixedly connected to the outer wall of the first connecting post near the support plate, a limiting cylinder is fixedly connected to the end of the first connecting post away from the top plate, a third sliding groove is provided on the outer wall of the first fixed post near the bottom plate, and a fourth sliding groove is provided on the outer wall of the first fixed post away from the bottom plate.

[0008] Optionally, a second connecting groove is provided on the inner wall of the fourth sliding groove near the third sliding groove, and teeth are provided on the outer wall of the toothed column near the central axis of the second sliding groove. A second fixing column is fixedly connected to the bottom end of the toothed column, and a first fixing plate is fixedly connected to the bottom end of the second fixing column.

[0009] Optionally, a second connecting column is fixedly connected to the outer wall of the second fixing column on the side near the central axis of the first fixing plate, a first sliding protrusion is fixedly connected to the outer wall of the first fixing plate near one end, a cable is fixedly connected to the top outer wall of the first sliding protrusion, and a second sliding protrusion is fixedly connected to the end of the cable away from the first sliding protrusion.

[0010] Optionally, a step post is fixedly connected to the side wall of the second sliding protrusion, a spring is fixedly connected to the bottom outer wall of the second sliding protrusion, and a plurality of second fixing plates are fixedly connected to the outer wall of the first fixing plate away from the second fixing post, and the same rotating post is fixedly connected to the end of the plurality of second fixing plates away from the first fixing plate.

[0011] Optionally, symmetrical guardrails are fixedly connected to the outer walls of the rotating column near both ends. A connecting plate is fixedly connected to the outer wall of the guardrail near the central axis of the rotating column. A first elastic plate is fixedly connected to the outer wall of the connecting plate and the second connecting column facing each other. A limit plate is fixedly connected to the end of the first elastic plate away from the second connecting column.

[0012] Optionally, a sliding column is slidably connected to the outer wall of the second fixed column, and a fifth sliding groove is symmetrically opened on the outer wall near both ends of the top of the sliding column. Rotating handles are symmetrically screwed to both ends of the sliding column, and a support plate is fixedly connected to the outer wall of the sliding column near the rotating column.

[0013] Optionally, a threaded post is rotatably connected to the inner wall of the rotating groove, a rotating protrusion is fixedly connected to one end of the threaded post near the rotating groove, a rotating tooth is fixedly connected to one end of the threaded post away from the rotating protrusion, and a third connecting post is symmetrically screwed to the outer wall of the threaded post near both ends, and an anti-detachment plate is fixedly connected to the top of the third connecting post.

[0014] Optionally, a threaded groove is provided on the top outer wall of the third connecting column, a clamping plate is rotatably connected to the bottom end of the third connecting column, a clamping block is fixedly connected to the outer wall of the clamping plate on the side away from the third connecting column, and a second elastic plate is fixedly connected to the outer wall of the third connecting column on the side close to the central axis of the threaded column.

[0015] Compared with the prior art, this utility model has at least the following beneficial effects: In the above solution, by setting auxiliary components, not only can the bag opening be quickly opened and fixed, but the limiting and fixing of the bag can also be quickly released after the material is unloaded, making it easy to remove the bag quickly and improving the work efficiency of the staff. In addition, the two sides of the bag can be limited during the unloading process to prevent the material from hitting the inner wall of the bag and causing the bag to tip over.

[0016] By setting up a first fixed plate, a second fixed column, a step column, a cable, and a spring, the operator can move the toothed column along the inner wall of the second sliding groove by stepping on the step column, which facilitates subsequent operations.

[0017] By setting up a guardrail, a second fixed plate, a first elastic plate, and a limiting plate, the packaging bag is not only limited to prevent it from tilting during the receiving process, but it also makes it easier for workers to remove the filled packaging bag from the device.

[0018] By setting up a pallet, sliding column, threaded column, third connecting column, and clamping block, not only can the bag opening be opened by stepping on the step column after the packaging bag is placed on the pallet, making it easier for subsequent material feeding, but the height of the pallet can also be adjusted according to the size of the packaging bag, so that the worker can put the bag opening onto the feeding port after stepping on the step column. Attached Figure Description

[0019] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present invention and, together with the specification, further serve to explain the principles of the present invention and enable those skilled in the art to implement and use the present invention.

[0020] Figure 1 A three-dimensional structural diagram of an automatic weighing machine for plastic product packaging; Figure 2 A schematic diagram of the enlarged structure of the auxiliary components; Figure 3 An enlarged three-dimensional structural diagram showing the combination of the base plate, support plate, and top plate; Figure 4 An enlarged three-dimensional structural diagram showing the combination of the parapet, the second fixing plate, and the second fixing post; Figure 5 A magnified three-dimensional structural diagram of the sliding column and the support plate in action; Figure 6 This is an enlarged three-dimensional structural diagram of the threaded column, the third connecting column, and the clamping plate.

[0021] Figure label: 1. Weighing machine main unit; 2. Base plate; 3. Support plate; 4. Top plate; 5. First sliding groove; 6. Rotating groove; 7. Second sliding groove; 8. First connecting groove; 9. Clearance groove; 10. First connecting post; 11. Abutting post; 12. Limiting cylinder; 13. First fixing post; 14. Third sliding groove; 15. Fourth sliding groove; 16. Second connecting groove; 17. Toothed post; 18. Second fixing post; 19. Second connecting post; 20. First fixing plate; 21. First sliding protrusion; 22. 23. Second fixed plate; 24. Cable; 25. Second sliding protrusion; 26. Step post; 27. Spring; 28. Guardrail; 29. ​​Connecting plate; 20. First elastic plate; 31. Limiting plate; 32. Sliding post; 33. Fifth sliding groove; 34. Rotating handle; 35. Support plate; 36. Threaded post; 37. Rotating protrusion; 38. Rotating tooth; 39. Third connecting post; 40. Anti-detachment plate; 41. Clamping plate; 42. Clamping block; 43. Second elastic plate; 44. Threaded groove; 45. Rotating post.

[0022] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiment of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0023] The automatic weighing machine for plastic product packaging provided by this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit this utility model.

[0024] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0025] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0026] It is understood that the meanings of “on”, “above”, and “above” in this utility model should be interpreted in the broadest manner, such that “on” not only means “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” not only means “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0027] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0028] like Figures 1 to 6As shown, an embodiment of this utility model provides an automatic weighing machine for plastic product packaging, including a weighing machine main unit 1. A base plate 2 is fixedly connected to the bottom of the weighing machine main unit 1. The base plate 2 is a square metal plate. A support plate 3 is fixedly connected to the outer wall of the base plate 2 near the weighing machine main unit 1. The support plate 3 is a U-shaped metal plate. A top plate 4 is fixedly connected to the end of the support plate 3 away from the base plate 2. The top plate 4 is a square metal plate. An avoidance groove 9 is formed on the outer wall of the middle part of the top plate 4. The avoidance groove 9 is a circular groove that can avoid the discharge port of the weighing machine main unit 1. Symmetrical openings are formed on the outer walls of the top of the top plate 4 near the avoidance groove 9 on both sides. The first sliding groove 5 is a square-shaped groove. A second sliding groove 7, also square-shaped, is formed on the outer wall of the top plate 4 near the first sliding groove 5. A first connecting groove 8, circular in shape, is formed on the inner wall of the first sliding groove 5 near the second sliding groove 7. The first sliding groove 5 communicates with the second sliding groove 7 through the first connecting groove 8. A rotating groove 6, a cylindrical groove with a convex cross-section, is formed on the inner wall of the first sliding groove 5 away from the second sliding groove 7. An auxiliary component is used to assist in fixing the packaging bag and is connected to the bottom plate 2 and the top plate 4 respectively. By setting the auxiliary component, this application can not only quickly open and fix the opening of the packaging bag, but also quickly release the limiting and fixing of the packaging bag after material feeding, facilitating quick removal of the packaging bag and improving the work efficiency of the staff. Furthermore, it can limit the two sides of the packaging bag during the feeding process, preventing the material from hitting the inner wall of the packaging bag and causing it to tip over.

[0029] like Figures 1 to 4As shown, the auxiliary component includes a toothed column 17 and a first fixed column 13. The first fixed column 13 is fixedly connected to the outer wall of the top of the base plate 2 near one side. A third sliding groove 14 is formed on the outer wall of the first fixed column 13 near the base plate 2, and a fourth sliding groove 15 is formed on the outer wall of the first fixed column 13 away from the base plate 2. A second connecting groove 16 is formed on the inner wall of the top of the fourth sliding groove 15 near the third sliding groove 14. Specifically, the first fixed column 13 is a square metal column, the third sliding groove 14 is formed on the outer wall of the first fixed column 13 near the base plate 2, and the third sliding groove 14 is a convex groove, and the fourth sliding groove 15 is formed on the outer wall of the first fixed column 13 away from the base plate 2, and the fourth sliding groove 16 is... The groove has a convex structure, wherein the second connecting groove 16 is formed on the inner wall of the fourth sliding groove 15 near the third sliding groove 14. The second connecting groove 16 is a square groove, and the fourth sliding groove 15 can be connected to the third sliding groove 14 through the second connecting groove 16. The toothed column 17 is slidably connected to the inner wall of the second sliding groove 7. The toothed column 17 is a square metal column, and the outer wall of the toothed column 17 near the central axis of the second sliding groove 7 has teeth. The bottom end of the toothed column 17 is fixedly connected to the second fixing column 18. The second fixing column 18 is a square metal column, and the bottom end of the second fixing column 18 is fixedly connected to the first fixing plate 20, which is a square metal plate. A second connecting post 19 is fixedly connected to the outer wall of the second fixed post 18 near the central axis of the first fixed plate 20. The two ends of the second connecting post 19 are fixedly connected to the outer walls of the two second fixed posts 18. The overall outline formed by the cooperation of the two second fixed posts 18 and the second connecting post 19 is H-shaped. A first sliding protrusion 21 is fixedly connected to the outer wall of the first fixed plate 20 near one end. The first sliding protrusion 21 is a convex metal plate, and its outer wall contour matches the inner wall contour of the third sliding groove 14. Therefore, the first sliding protrusion 21 can slide on the inner wall of the third sliding groove 14. A cable 23, made of metal, is fixedly connected to the top outer wall of the first sliding protrusion 21. The end of cable 23 away from the first sliding protrusion 21 is fixedly connected to a second sliding protrusion 24. The end of cable 23 away from the first sliding protrusion 21 passes through the second connecting groove 16 and is fixedly connected to the top outer wall of the second sliding protrusion 24. The second sliding protrusion 24 is a convex metal plate, and the outer contour of the second sliding protrusion 24 matches the inner contour of the fourth sliding groove 15. Therefore, the second sliding protrusion 24 can slide on the inner wall of the fourth sliding groove 15. A step post 25 is fixedly connected to the side wall of the second sliding protrusion 24. The step post 25 is a square metal column. A spring 26 is fixedly connected to the bottom outer wall of the second sliding protrusion 24. The other end of the spring 26 is fixedly connected to the bottom inner wall of the fourth sliding groove 15. When the spring 26 is under force...The spring 26 deforms along its bending direction. When the operator steps on the foot post 25 towards the bottom of the first fixed post 13, the foot post 25 causes the second sliding protrusion 24 to slide along the inner wall of the fourth sliding groove 15 towards the bottom of the first fixed post 13. At this time, the spring 26 is stressed and deforms along its bending direction. Driven by the cable 23, the first sliding protrusion 21 slides along the third sliding groove 14 towards the top of the first fixed post 13. Simultaneously, the first fixed plate 20 moves towards the top of the weighing machine main unit 1 under the action of the first sliding protrusion 21. At this time, the first fixed plate 20 drives the second fixed post 18 to move synchronously, and the toothed post 17 slides along the inner wall of the second sliding groove 7 towards the top of the weighing machine main unit 1 under the action of the second fixed post 18. With the above structural setup, the operator can drive the toothed post 17 to slide along the inner wall of the second sliding groove 7 by stepping on the foot post 25, which provides convenience for subsequent operations.

[0030] like Figures 1 to 4As shown, the auxiliary component also includes a first connecting column 10. One end of the first connecting column 10 is fixedly connected to the outer wall of the bottom of the top plate 4 near the first sliding groove 5. The first connecting column 10 is a square metal column. An abutting column 11 is fixedly connected to the outer wall of the middle part of the first connecting column 10 near the support plate 3. The abutting column 11 is a semi-circular metal column. A limiting cylinder 12 is fixedly connected to the end of the first connecting column 10 away from the top plate 4. The limiting cylinder 12 is a hollow metal column. Several second fixing plates 22 are fixedly connected to the outer wall of the first fixing plate 20 away from the second fixing column 18. The second fixing plates 22 are square metal plates. There are two second fixing plates 22 in total. The two second fixing plates 22 are symmetrically fixedly connected to the outer walls of the first fixing plate 20 near both sides. The two second fixing plates 22 are fixedly connected to the same rotating column 44 at the ends away from the first fixing plate 20. The rotating column 44 is a metal cylinder. A guardrail 27 is symmetrically fixedly connected to the outer walls of the rotating column 44 near both ends. The guardrail 27 is square. The metal plate structure has an open end at the end of the guardrail 27 away from the rotating column 44, and the outer contour of the top of the guardrail 27 matches the inner contour of the limiting cylinder 12, so the guardrail 27 can be inserted into the limiting cylinder 12. A connecting plate 28 is fixedly connected to the outer wall of the middle part of the guardrail 27 near the central axis of the rotating column 44. The two ends of the connecting plate 28 are fixedly connected to the middle outer wall of the guardrail 27. The overall contour formed by the cooperation between the two guardrails 27 and the connecting plate 28 is an H-shaped structure. The connecting plate 28 and the second connecting column 19 A first elastic plate 29 is fixedly connected to the outer wall facing each other. The first elastic plate 29 is an S-shaped metal plate. When the first elastic plate 29 is subjected to force, it will deform along its bending direction. A limiting plate 30 is fixedly connected to the end of the first elastic plate 29 away from the second connecting column 19. The limiting plate 30 is composed of three square metal plates. The top and bottom ends of the limiting plate 30 are inclined square metal plates. The two limiting plates 30 can provide a certain limiting effect for the packaging bag containing the material.

[0031] When staff prepare to package the symmetrically measured materials, they can first rotate the guardrail 27 around the rotating column 44 to make it parallel to the second fixed plate 22 for placing the packaging bag. Then, they rotate the guardrail 27 again until it is perpendicular to the second fixed plate 22 and step on the step post 25. During this process, the guardrail 27 moves synchronously with the second fixed plate 22, and its top inserts into the limiting cylinder 12, thereby locking the guardrail 27 and preventing it from rotating. At the same time, the first elastic plate 29 and the limiting plate 30 on the connecting plate 28 rotate with the guardrail 27. In this way, the two limiting plates 30 connected to the connecting plate 28 and the second connecting column 19 are respectively located on both sides of the packaging bag. When the material begins to be fed from the bottom of the feeding port, the material falls and hits the bag wall. Especially when the bag is more than half full, the bag body is prone to tilting. At this time, the limiting plates 30 on both sides will abut against the bag wall to form an effective limit. After the filling is completed, the operator releases the step post 25, and the guardrail 27 moves down with the second fixing plate 22 to reset. Its top slides out of the limiting cylinder 12 to release the lock. Finally, the guardrail 27 is rotated back to a position parallel to the second fixing plate 22, and the packaged bag with the material can be taken out. The above structure not only limits the packaging bag and prevents the packaging bag from tilting during the receiving process, but also makes it easy for the operator to remove the packaged bag with the material from the device.

[0032] like Figure 1 , Figure 2 and Figures 4 to 6As shown, a sliding column 31 is slidably connected to the outer wall of the second fixed column 18. The sliding column 31 is a square metal column. A fifth sliding groove 32 is symmetrically opened on the outer wall of the top of the sliding column 31 near both ends. The fifth sliding groove 32 is a square groove, and the inner wall contour of the fifth sliding groove 32 is adapted to the outer wall contour of the second fixed column 18. Therefore, the sliding column 31 can slide on the outer wall of the second fixed column 18. A support plate 34 is fixedly connected to the outer wall of the sliding column 31 near the rotating column 44. The support plate 34 is a square metal plate. When the sliding column 31 slides along the outer wall of the second fixed column 18, the support plate 34 will move synchronously under the drive of the second fixed column 18. Rotating handles 3 are symmetrically screwed to both ends of the sliding column 31. 3. The rotating handle 33 consists of two parts: a metal cylinder with a threaded groove on one end of its outer wall and a metal cylinder with an anti-slip groove on the other end of its outer wall. The ends of the two rotating handles 33 with threaded grooves are symmetrically screwed to the two ends of the sliding column 31. When the sliding column 31 slides along the outer wall of the second fixed column 18 to a suitable position, the rotating handle 33 can be rotated. During rotation, the rotating handle 33 will abut against the outer wall of the second fixed column 18, thus limiting the sliding column 31. A threaded column 35 is rotatably connected to the inner wall of the rotating groove 6. The threaded column 35 is a metal cylinder with threads on its outer wall near both ends, and the threads on the threaded column 35 near both ends are symmetrical about the central axis of the threaded column 35. A rotating protrusion 36 is fixedly connected to one end of the threaded column 35. The rotating protrusion 36 is a convex metal cylinder, and the outer contour of the rotating protrusion 36 matches the inner contour of the rotating groove 6. Therefore, the rotating protrusion 36 can rotate on the inner wall of the rotating groove 6. A rotating tooth 37 is fixedly connected to the end of the threaded column 35 away from the rotating protrusion 36. The outer contour of the rotating tooth 37 matches the inner contour of the second sliding groove 7. Therefore, the second sliding groove 7 can provide clearance space for the rotation of the rotating tooth 37. Since the teeth on the outer wall of the rotating tooth 37 mesh with the teeth on the outer wall of the toothed column 17, the toothed column 17 slides along the inner wall of the second sliding groove 7 toward the top of the weighing machine main unit 1, which will drive the rotating tooth 37 to rotate. The inner wall contour of the first connecting groove 8 is adapted to the rotation of the rotating gear 37, so the rotating gear 37 will drive the threaded post 35 to rotate synchronously along the inner wall of the first connecting groove 8. The outer walls of the threaded post 35 near both ends are symmetrically screwed with third connecting posts 38. The third connecting posts 38 are square metal posts, and the outer wall contour of the third connecting posts 38 is adapted to the inner wall contour of the first sliding groove 5 mentioned above. Therefore, the third connecting posts 38 can slide on the inner wall of the first sliding groove 5. The top of the third connecting posts 38 is fixedly connected with an anti-detachment plate 39. The anti-detachment plate 39 is a square metal plate, and the size of the anti-detachment plate 39 is larger than the size of the first sliding groove 5. Therefore, the anti-detachment plate 39 can slide out of the first sliding groove 5 or deviate when the third connecting posts 38 slide.The top outer wall of the third connecting post 38 is provided with a threaded groove 43. The threaded groove 43 is a circular groove with threads on its inner wall, and the inner wall contour of the threaded groove 43 is adapted to the threads on the outer wall of the threaded post 35. Therefore, when the threaded post 35 rotates, the third connecting post 38 will not rotate with the threaded post 35 due to the constraint of the first sliding groove 5, and will slide along the inner wall of the first sliding groove 5. Since the threaded grooves on the outer wall near both ends of the threaded post 35 are symmetrically distributed, the third connecting post 38 screwed to the two ends of the threaded post 35 will slide simultaneously along the inner wall of the first sliding groove 5 towards both ends of the threaded post 35 during the rotation of the threaded post 35. A clamping plate 40 is rotatably connected to the bottom end of the third connecting post 38. The clamping plate 40 is a square metal plate. A clamping block 41 is fixedly connected to the outer wall of the clamping plate 40 on the side away from the third connecting post 38. The clamping block 41 is a square rubber block, and an anti-slip groove is provided on the outer wall of the clamping block 41 on the side away from the clamping plate 40 to prevent the bag opening from slipping off the outer wall of the clamping block 41 during the opening of the packaging bag. A second elastic plate 42 is fixedly connected to the outer wall of the third connecting post 38 on the side near the central axis of the threaded post 35. The second elastic plate 42 is a C-shaped metal plate, and the other end of the second elastic plate 42 is fixedly connected to the outer wall of the clamping plate 40 on the side near the third connecting post 38.

[0033] The operator first slides the sliding column 31 along the outer wall of the second fixed column 18 to a suitable position, then rotates the rotating handle 33 to make it abut against the outer wall of the second fixed column 18, thereby fixing the sliding column 31. Next, the packaging bag is placed on the pallet 34, and the stepper 25 is stepped on, driving the toothed column 17 to slide along the inner wall of the second sliding groove 7 towards the top of the weighing machine main unit 1. During this process, the pallet 34 delivers the packaging bag to the discharge port of the weighing machine main unit 1, so that the bag opening can be fitted onto the four clamping blocks 41. At the same time, the toothed column 1... 7 drives the rotating gear 37 to rotate, thereby causing the threaded column 35 to rotate synchronously. As the threaded column 35 rotates, the third connecting columns 38 at both ends slide in opposite directions along the inner wall of the first sliding groove 5, and drive the two clamping plates 40 and the clamping block 41 to move synchronously. At this time, the top of the outer wall of the clamping block 41 on the side away from the clamping plate 40 first abuts against the inner wall of the bag opening. As the third connecting column 38 continues to move, the originally inclined clamping plate 40 rotates around the connection point with the third connecting column 38, causing the outer wall of the clamping block 41 to fit tightly against the inner wall of the bag opening. The bag opening is opened to allow for subsequent material feeding. At this time, the second elastic plate 42 is subjected to force and deforms along its bending direction. When the operator releases the step post 25, the toothed post 17 slides along the inner wall of the second sliding groove 7 towards the bottom of the weighing machine main unit 1, which again drives the rotating tooth 37 and the threaded post 35 to rotate in the opposite direction. At this time, the two third connecting posts 38 slide back to their original positions along the inner wall of the first sliding groove 5 towards the middle of the threaded post 35. The clamping plate 40 and the clamping block 41 move synchronously. The clamping block 41 no longer abuts against the inner wall of the bag opening, and the second elastic plate 42 loses its external force. After the force is applied, the deformation is restored along its bending direction, causing the clamping plate 40 to reset and maintain its tilted state. At the same time, the pallet 34 moves the packaging bag filled with material towards the bottom of the weighing machine main unit 1, so that the bag opening is separated from the feeding port, so that the packaging bag containing material can be taken out. The above structure can be set up so that after the packaging bag is placed on the pallet 34, the bag opening can be opened by stepping on the step post 25, which is convenient for subsequent feeding. The height of the pallet 34 can also be adjusted according to the size of the packaging bag, so that the worker can put the bag opening onto the feeding port after stepping on the step post 25.

[0034] The workflow of the technical solution provided by this utility model is as follows: In use, the operator first rotates the guardrail 27 with the rotating column 44 as the center, so that it is parallel to the second fixed plate 22. Then, the sliding column 31 is slid along the outer wall of the second fixed column 18 to the appropriate position, and the rotating handle 33 is rotated to make it abut against the outer wall of the second fixed column 18, thereby fixing the sliding column 31. Next, the packaging bag is placed on the tray 34, the guardrail 27 is rotated again until it is perpendicular to the second fixed plate 22, and the step column 25 is stepped down.

[0035] After the stepper 25 is pressed, it drives the second sliding protrusion 24 to slide along the inner wall of the fourth sliding groove 15 toward the bottom of the first fixed post 13. At this time, the spring 26 is compressed and, under the traction of the cable 23, the first sliding protrusion 21 slides along the third sliding groove 14 toward the top of the first fixed post 13. At the same time, it drives the first fixed plate 20 to move toward the top of the weighing machine host 1. The first fixed plate 20 then drives the second fixed post 18 to move synchronously. The toothed post 17 also slides along the inner wall of the second sliding groove 7 toward the top of the weighing machine host 1. At the same time, the second fixed plate 22 moves with the second fixed post 18, and the guard plate 27 rises synchronously with the second fixed plate 22. Its top is inserted into the limiting cylinder 12 to lock. During this process, the tray 34 delivers the packaging bag to the discharge port of the weighing machine host 1, so that the bag opening can be easily put on the four clamping blocks 41.

[0036] At the same time, the toothed column 17 drives the rotating tooth 37 to rotate, which in turn causes the threaded column 35 to rotate synchronously. As the threaded column 35 rotates, the third connecting column 38 at both ends slides in opposite directions along the inner wall of the first sliding groove 5, and drives the two clamping plates 40 and the clamping block 41 to move synchronously. At this time, the top of the outer wall of the clamping block 41 on the side away from the clamping plate 40 first abuts against the inner wall of the bag opening. As the third connecting column 38 continues to move, the originally inclined clamping plate 40 rotates around the connection point with the third connecting column 38, causing the outer wall of the clamping block 41 to fit tightly against the inner wall of the bag opening, thereby opening the bag opening for subsequent material feeding. During this process, the second elastic plate 42 is subjected to force and deforms along its bending direction.

[0037] When the material begins to be fed from the feed port, the material falls and hits the bag wall. Especially when the product inside the bag is more than half full, the bag body is prone to tilting. At this time, the limiting plates 30 on both sides of the bag body will abut against the outer wall of the bag body, forming an effective limit on the packaging bag.

[0038] After loading is complete, the operator releases the foot pedal 25, and the spring 26, no longer under force, returns to its original state, pushing the second sliding protrusion 24 to slide along the inner wall of the fourth sliding groove 15 towards the top of the first fixed post 13. At this time, under the action of gravity, the second fixed post 18, the first fixed plate 20, and the guardrail 27 move towards the bottom of the weighing machine main unit 1, and the toothed post 17 slides along the second sliding groove 7 towards the bottom, causing the rotating tooth 37 and the threaded post 35 to rotate in the opposite direction again. The two third connecting posts 38 then reset along the first sliding groove 5 towards the middle of the threaded post 35. The clamping plate 40 and the clamping block 41 move synchronously. The clamping block 41 no longer abuts against the inner wall of the bag opening. After the second elastic plate 42 loses external force, it recovers its deformation, driving the clamping plate 40 to reset and maintain its tilted state. At the same time, the support plate 34 drives the packaging bag filled with material to move towards the bottom of the weighing machine main unit 1, so that the bag opening is separated from the feeding port. Meanwhile, the top of the guard plate 27 slides out of the limiting cylinder 12 during the downward movement and is unlocked. Then, the guard plate 27 is rotated back to a position parallel to the second fixed plate 22 with the rotating column 44 as the center, and the packaging bag filled with material can be taken out.

[0039] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details are described in detail in the preferred embodiments; however, those skilled in the art can fully understand this utility model without these details. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0040] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An automatic weighing machine for plastic product packaging, characterized in that, The weighing machine includes a weighing machine main unit, a base plate fixedly connected to the bottom of the weighing machine main unit, a support plate fixedly connected to the outer wall of the base plate near the weighing machine main unit, a top plate fixedly connected to the end of the support plate away from the base plate, a clearance groove provided on the middle outer wall of the top plate, first sliding grooves symmetrically provided on the outer walls of the top of the top plate near the clearance grooves on both sides, a second sliding groove provided on the outer wall of the top of the top plate near the first sliding grooves, a first connecting groove provided on the inner wall of the first sliding groove near the second sliding groove, and a rotating groove provided on the inner wall of the first sliding groove away from the second sliding groove. An auxiliary component is used to help secure the packaging bag, and the auxiliary component is connected to the bottom plate and the top plate respectively.

2. The automatic weighing machine for plastic product packaging according to claim 1, characterized in that, The auxiliary component includes a first connecting post, a first fixing post, and a toothed post. One end of the first connecting post is fixedly connected to the outer wall of the bottom of the top plate near the first sliding groove. The toothed post is slidably connected to the inner wall of the second sliding groove. The first fixing post is fixedly connected to the outer wall of the top of the bottom plate near one side.

3. The automatic weighing machine for plastic product packaging according to claim 2, characterized in that, An abutment post is fixedly connected to the outer wall of the first connecting post near the support plate. A limit cylinder is fixedly connected to the end of the first connecting post away from the top plate. A third sliding groove is provided on the outer wall of the first fixed post near the bottom plate. A fourth sliding groove is provided on the outer wall of the first fixed post away from the bottom plate.

4. The automatic weighing machine for plastic product packaging according to claim 3, characterized in that, A second connecting groove is provided on the inner wall of the fourth sliding groove near the third sliding groove. A toothed groove is provided on the outer wall of the toothed column near the central axis of the second sliding groove. A second fixing column is fixedly connected to the bottom end of the toothed column, and a first fixing plate is fixedly connected to the bottom end of the second fixing column.

5. The automatic weighing machine for plastic product packaging according to claim 4, characterized in that, A second connecting column is fixedly connected to the outer wall of the second fixing column on the side near the central axis of the first fixing plate. A first sliding protrusion is fixedly connected to the outer wall of the first fixing plate near one end. A cable is fixedly connected to the top outer wall of the first sliding protrusion. A second sliding protrusion is fixedly connected to the end of the cable away from the first sliding protrusion.

6. The automatic weighing machine for plastic product packaging according to claim 5, characterized in that, A step post is fixedly connected to the side wall of the second sliding protrusion, and a spring is fixedly connected to the bottom outer wall of the second sliding protrusion. Several second fixing plates are fixedly connected to the outer wall of the first fixing plate away from the second fixing post, and the same rotating post is fixedly connected to the end of the several second fixing plates away from the first fixing plate.

7. The automatic weighing machine for plastic product packaging according to claim 6, characterized in that, Symmetrical guardrails are fixedly connected to the outer walls of the rotating column near both ends. A connecting plate is fixedly connected to the outer wall of the guardrail near the central axis of the rotating column. A first elastic plate is fixedly connected to the outer wall of the connecting plate and the second connecting column facing each other. A limit plate is fixedly connected to the end of the first elastic plate away from the second connecting column.

8. The automatic weighing machine for plastic product packaging according to claim 6, characterized in that, A sliding column is slidably connected to the outer wall of the second fixed column. A fifth sliding groove is symmetrically opened on the outer wall of the top of the sliding column near both ends. Rotating handles are symmetrically screwed to both ends of the sliding column. A support plate is fixedly connected to the outer wall of the sliding column near the rotating column.

9. The automatic weighing machine for plastic product packaging according to claim 1, characterized in that, A threaded post is rotatably connected to the inner wall of the rotating groove. A rotating protrusion is fixedly connected to one end of the threaded post near the rotating groove. A rotating tooth is fixedly connected to the other end of the threaded post away from the rotating protrusion. A third connecting post is symmetrically screwed onto the outer wall of the threaded post near both ends. An anti-detachment plate is fixedly connected to the top of the third connecting post.

10. The automatic weighing machine for plastic product packaging according to claim 9, characterized in that, The third connecting column has a threaded groove on its top outer wall, and a clamping plate is rotatably connected to its bottom end. A clamping block is fixedly connected to the outer wall of the clamping plate on the side away from the third connecting column, and a second elastic plate is fixedly connected to the outer wall of the third connecting column on the side close to the central axis of the threaded column.

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