A kind of fast bag clamping mechanism for two kinds of particle sizes

Abstract

The application relates to the field of plastic packaging equipment, and particularly discloses a granular rapid bag clamping mechanism suitable for two kinds of sizes and diameters, which is arranged on the outer side of a hopper and comprises a first bag clamping assembly and a second bag clamping assembly. The first bag clamping assembly is arranged at a discharge port of the hopper and is used for abutting a bag opening of a first-size packaging bag against the discharge port of the hopper. The second bag clamping assembly is arranged on the outer side of the first bag clamping assembly and is used for hanging a second-size packaging bag at the discharge port of the hopper. The first bag clamping assembly and the second bag clamping assembly are integrated, the compatibility of small-diameter ordinary packaging bags and large-diameter packaging bags with hanging rings is realized, the problem of weak applicability of the existing equipment is solved, and the universality and flexibility of the equipment are enhanced.

Description

Technical Field

[0001] This application relates to the field of plastic packaging equipment, and in particular to a rapid bag clamping mechanism for granules applicable to two different sizes. Background Technology

[0002] Rapid plastic granule packaging equipment is a device used for the efficient and precise packaging of plastic granules. It completes the packaging process through a series of automated steps, including metering, bagging, and sealing. This equipment typically includes components such as a hopper, metering mechanism, bag clamping mechanism, and sealing mechanism. Its working principle involves the metering mechanism detecting the weight of the plastic granules in the hopper, then moving the packaging bag to the hopper's outlet. The bag clamping mechanism holds the bag in place, the metering mechanism transfers the plastic granules into the bag, and finally, the sealing mechanism completes the sealing process.

[0003] Currently, the fast packaging of plastic granules uses different fixing methods depending on the size of the packaging bag. Therefore, the same packaging equipment is usually difficult to adapt to packaging bags of various sizes, resulting in weak applicability. Utility Model Content

[0004] To facilitate adaptation to various packaging bag sizes, this application provides a quick bag clamping mechanism for granules that is applicable to two different sizes of openings.

[0005] The present application provides a rapid bag-clamping mechanism for granules applicable to two different sizes, which adopts the following technical solution: A rapid bag clamping mechanism for granules with two different sizes is provided on the outside of a hopper. It includes a first bag clamping assembly and a second bag clamping assembly. The first bag clamping assembly is positioned at the discharge port of the hopper and is used to press the opening of a first-sized packaging bag against the discharge port of the hopper. The second bag clamping assembly is positioned outside the first bag clamping assembly and is used to hang a second-sized packaging bag at the discharge port of the hopper.

[0006] By adopting the above technical solution, the first bag clamping assembly can be used to be compatible with common small-diameter packaging bags, while the second bag clamping assembly can be adapted to large-sized packaging bags with hanging rings. That is, by integrating the first bag clamping assembly and the second bag clamping assembly, which have different working methods and installation positions, this application enables a single mechanism to have the function of fixing two different sizes of packaging bags, thereby solving the technical problem of difficulty in adapting and weak applicability due to different packaging bag sizes pointed out in the background art, and improving the diversity of packaging functions and market adaptability of a single device.

[0007] Optionally, the first bag clamping assembly includes two rotatably configured clamps and a first power telescopic member connected between the two clamps. The fixed end of the first power telescopic member is rotatably connected to one of the clamps, and the movable end of the first power telescopic member is rotatably connected to the other clamp. The first power telescopic member is used to drive the two clamps to press against the two sides of the hopper outlet.

[0008] By adopting the above technical solution, the first power telescopic component drives the two grippers to move closer or further apart, realizing the automatic clamping and releasing of the bag opening of small-sized packaging bags; the first power telescopic component provides a stable and reliable clamping force to ensure that the packaging bag will not loosen or fall off during the filling process, which helps to improve the stability of clamping.

[0009] Optionally, the gripper includes two swing arms, a connecting block connected to each of the swing arms, and a clamping member connected between the two connecting blocks. The swing arms are rotatably configured, and the clamping member is used to abut against the hopper. When both clamping members abut against the hopper, the connecting block connected to one of the clamping members and the connecting block connected to the other clamping member are spaced apart.

[0010] By adopting the above technical solution, the clamping component is the part that directly contacts the packaging bag, while the spaced connecting blocks serve as the framework for force and transmission, thereby achieving a stable clamping of the packaging bag. Since the connecting blocks on both sides of the hopper are spaced apart when both belts press the bag opening against the bottom of the hopper, it is not easy for the operator's hand to be pinched when the two grippers approach each other, thus achieving protection for the operator.

[0011] Optionally, the clamping element is a flexible strip.

[0012] By adopting the above technical solution, a flexible belt is used as a clamping component. With its good flexibility, it can better conform to the contour curve of the hopper outlet and the shape of the packaging bag opening when driven and pressed by the clamping claws, forming a tighter fit. This improves the sealing and fixing effect of the bag opening and helps prevent leakage of granular materials during filling.

[0013] Optionally, the second bag clamping assembly includes a plurality of hooks arranged in a ring at intervals, each hook being used to attach a hanging loop on the packaging bag.

[0014] By adopting the above technical solution, a hanging structure suitable for large-size ton bags and other packaging bags with hanging rings is formed. The circular arrangement design allows the weight of the packaging bag to be evenly distributed to each hanging point, ensuring the stable vertical hanging of the bag body and facilitating smooth subsequent filling.

[0015] Optionally, the hook is provided with a mounting base on its outer side, the hook is rotatably connected to the mounting base, the mounting base is provided with a second power telescopic member, the two ends of the second power telescopic member are respectively connected to the mounting base and the hook, and the second power telescopic member is used to drive the hook to rotate.

[0016] By adopting the above technical solution, the hook can be flipped upward after the packaging bag hanging ring is attached. This change in posture forms a preliminary locking mechanism, which uses gravity to prevent the hanging ring from slipping out of the hook, thereby improving the reliability of the hanging operation and ensuring the smooth progress of the loading process.

[0017] Optionally, the mounting base is provided with a baffle, which is located on the rotation path of the hook, and the baffle is provided with a clearance groove for the hook to pass through.

[0018] By adopting the above technical solution, the hook can cooperate with the inner wall of the clearance groove on the baffle after rotation, forming a relatively closed area, restricting the hanging ring of the packaging bag in this area, and preventing it from falling off the hook, thus forming a more reliable mechanical lock and eliminating the risk of the hanging ring falling off due to material shaking or other reasons.

[0019] Optionally, a third power telescopic member is provided on the outer side of the mounting base, the movable end of the third power telescopic member is connected to the mounting base, and the third power telescopic member is used to drive the mounting base to rise and fall.

[0020] By adopting the above technical solution, multiple hooks can be raised and lowered, which can flexibly adjust the vertical distance between the top opening of the packaging bag and the discharge port of the hopper. This allows the device to adapt to packaging bags of different heights. Furthermore, by shortening the material falling distance, it helps to reduce material impact, reduce the amount of dust raised during the loading process, and optimize the working environment and loading effect.

[0021] Optionally, the hook includes a fixed part, a movable part, and an elastic element. The fixed part is rotatably connected to the mounting base and is connected to the second power telescopic element. The movable part is rotatably connected to the fixed part, and the elastic element is connected to both the fixed part and the movable part.

[0022] By adopting the above technical solution, the hook is designed as a segmented self-locking structure, which realizes the quick and one-way installation of the hanging ring: simply push the hanging ring upward to make the movable part deflect to one side. After the hanging ring passes the movable part, the elastic element automatically resets it to lock the hanging ring. This design eliminates the need for additional locking operations when suspending each hanging ring, simplifies the installation process of multiple hanging rings, and improves the operating efficiency of the hanging bag.

[0023] In summary, this application includes the following beneficial technical effects: 1. By integrating the first and second bag clamping components, compatibility with small-diameter ordinary packaging bags and large-diameter packaging bags with hanging loops is achieved, solving the problem of weak applicability of existing equipment and enhancing the versatility and flexibility of the equipment.

[0024] 2. By designing a flip-lockable hook and a height-adjustable mounting base for the second bag clamping assembly, not only is the hanging stability of large packaging bags ensured during the filling process, but the filling effect can also be guaranteed and dust reduced by adjusting the height, thus optimizing the filling process and working environment.

[0025] 3. The hook is designed as a self-locking structure with a movable part and elastic element, which simplifies the steps for operators to hang large-sized packaging bags, and helps to simplify the operation and thus improve the hanging efficiency. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure from a first-view perspective of Embodiment 1 of this application; Figure 2 This is a schematic diagram of the overall structure from a second perspective of Embodiment 1 of this application; Figure 3 This is a schematic diagram of the structure of the first clamping assembly, as shown in Embodiment 1 of this application; Figure 4 This is a schematic diagram of the structure of the second clip bag assembly, as shown in Embodiment 2 of this application; Figure 5 This is a schematic diagram of the internal structure of the mounting base in the second clip bag assembly of Embodiment 2 of this application.

[0027] Reference numerals: 1. First bag clamping assembly; 11. Gripper; 111. Swing arm; 112. Connecting block; 113. Clamping component; 12. First power telescopic component; 2. Second bag clamping assembly; 21. Hook; 211. Fixing part; 212. Movable part; 213. Elastic component; 3. Mounting base; 31. Baffle; 311. Clearance groove; 4. Second power telescopic component; 5. Third power telescopic component; 6. Hopper. Detailed Implementation

[0028] The following combination Figures 1-5 This application will be described in further detail.

[0029] Example 1 This application discloses a rapid bag-clamping mechanism for granules applicable to two different sizes, which is located at the discharge port at the bottom of the hopper 6. (Refer to...) Figure 1The rapid bag clamping mechanism for granules of two sizes includes a first bag clamping assembly 1 and a second bag clamping assembly 2. The first bag clamping assembly 1 is located at the discharge port at the bottom of the hopper 6 and is used to accommodate small-sized packaging bags that need to be tightly secured to the outer wall of the discharge port of the hopper 6. The second bag clamping assembly 2 is located outside the first bag clamping assembly 1 and is used to accommodate large-sized packaging bags with hanging loops. In this embodiment, the packaging bag has four hanging loops. The first bag clamping assembly 1 and the second bag clamping assembly 2 are described below.

[0030] Reference Figure 2 and Figure 3 The first bag clamping assembly 1 includes two grippers 11 and a first power telescopic member 12 connected between the two grippers 11. The two grippers 11 are arranged opposite each other on both sides of the discharge port of the hopper 6, and both grippers 11 are hinged to the outside of the hopper 6 with parallel hinge axes, and the two grippers 11 are symmetrically arranged. The first power telescopic member 12 is a cylinder, and its two ends are respectively hinged to the two grippers 11, and the hinge axes at both ends of the first power telescopic member 12 are parallel. When the operator puts the opening of a small-sized packaging bag over the discharge port at the bottom of the hopper 6, the first power telescopic member 12 is activated; the piston rod of the first power telescopic member 12 retracts, pushing the two grippers 11 closer together, so that both grippers 11 press the opening of the packaging bag tightly against the outer wall of the hopper 6, thereby clamping and fixing the packaging bag so that the plastic particles in the hopper 6 can fall into the packaging bag.

[0031] Each gripper 11 includes two swing arms 111, a connecting block 112 connected to the end of each swing arm 111, and a clamping member 113 connected between the two connecting blocks 112. The two swing arms 111 in each gripper 11 are arranged in parallel at intervals. The top end of the swing arm 111 is hinged to the outside of the hopper 6, and the bottom end of the swing arm 111 is fixedly connected to the connecting block 112. The middle part of the swing arm 111 is hinged to the first power telescopic member 12. The clamping member 113 is a flexible belt made of rubber and has a curved arc shape. Because the clamping member 113 is flexible, it can fit well against the arc-shaped outer wall of the hopper 6, forming a uniform and firm clamping force, thereby ensuring a good seal at the bag opening during loading and preventing the bag from falling off or leaking.

[0032] In addition, when the clamping parts 113 on both sides tightly press the bag opening onto the outer wall of the hopper 6, the connecting blocks 112 on both sides of the hopper 6 are arranged at intervals, that is, a gap is formed between the connecting blocks 112 on both sides of the hopper 6. This ensures that when the operator puts the bag opening into the bottom of the hopper 6 and holds the bag, the two close-to-each-other clamping claws 11 will not come into contact with the operator's hand, thus protecting the operator and preventing injury to the operator during the bag clamping process.

[0033] Reference Figure 2 The second bag-clamping assembly 2 includes a plurality of hooks 21 arranged in a circumferential array. In this embodiment, four hooks 21 are provided; in other embodiments, the number of hooks 21 may also be set as needed, such as two, three, five or more. The hooks 21 are located on the outside of the first clamping assembly and are used to hang the hanging ring at the top opening of a large-sized packaging bag.

[0034] Furthermore, each hook 21 is rotatably connected to a mounting base 3, which is also equipped with a second power telescopic component 4, which is a cylinder. The piston rod of the second power telescopic component 4 faces downward, and the cylinder body of the second power telescopic component 4 is rotatably connected to the mounting base 3. The end of the piston rod of the second power telescopic component 4 is rotatably connected to the hook 21. The rotation axes at both ends of the second power telescopic component 4 are parallel, so the action of the second power telescopic component 4 can control the hook 21 to rotate around the connection point. When it is necessary to fill a large-sized packaging bag with hanging rings, the operator first hangs the four hanging rings on the packaging bag onto the corresponding hooks 21; then controls the four second power telescopic components 4 to rotate all the hooks 21 upward to prevent the hanging rings from detaching from the hooks 21 during the filling process.

[0035] To ensure a more secure hanging, each mounting base 3 has a baffle 31 fixed along the rotation path of the hook 21. The bottom end of the baffle 31 has a clearance groove 311 for the hook 21 to pass through. When the hook 21 flips upward, the front end of the hook 21 passes through the clearance groove 311 and comes into close contact with the inner wall of the clearance groove 311. Thus, the hook 21 and the baffle 31 together form a closed area, reliably locking the hanging ring of the packaging bag inside. Even if there is shaking during the filling process, the hanging ring cannot detach from the hook 21.

[0036] Furthermore, to better accommodate packaging bags of varying heights, all mounting bases 3 can be raised and lowered together. A third power telescopic component 5 is also fixedly mounted on the external frame of the hopper 6. This third power telescopic component 5 is a cylinder with its piston rod pointing vertically downwards. Four third power telescopic components 5 are provided, each corresponding to one of the four mounting bases 3, and the end of the piston rod of each component 5 is fixedly connected to the mounting base 3. Therefore, by controlling the third power telescopic component 5, the four hooks 21 can be driven to move up and down synchronously, thereby adjusting the distance between the top of the packaging bag and the discharge port at the bottom of the hopper 6. Reducing this distance effectively reduces the material's falling height, decreases material impact, and thus reduces dust generation, contributing to a better working environment.

[0037] In this embodiment, the first power telescopic member 12, the second power telescopic member 4, and the third power telescopic member 5 are all cylinders. In other embodiments, they can also be set as servo electric cylinders or electric push rods.

[0038] The implementation principle of Example 1 is as follows: Based on the type and size of the packaging bag, the corresponding component is activated. When packaging small-sized bags, the first bag-clamping component 1 is activated, using the flexible clamping element 113 to firmly press the bag opening against the outlet of the hopper 6. When packaging large-sized bags with hanging loops, the second bag-clamping component 2 is used, where the bag is hung via hook 21 and locked by flipping. The overall height is then adjusted before loading. This switching between the two modes allows the same device to efficiently and reliably complete the clamping process for bags of varying diameters, thereby expanding the applicability of the device.

[0039] Example 2 Reference Figure 4 and Figure 5 The difference between this embodiment and Embodiment 1 is that in this embodiment, each hook 21 is no longer a single rigid component, but rather adopts a split self-locking design. The hook 21 includes a fixed part 211, a movable part 212, and an elastic element 213 connecting the fixed part 211 and the movable part 212; the elastic element 213 is a torsion spring. The fixed part 211 is still rotatably connected to the mounting base 3 and hinged to the movable end of the second power telescopic member 4 to achieve the overall flipping function. The movable part 212 is rotatably connected to the end of the fixed part 211 via a pin and is pressed against the fixed part 211 by the tortuous elastic element 213. The function of the elastic element 213 is to consistently provide the movable part 212 with a force that returns it to its aligned position with the fixed part 211.

[0040] This structure provides operational convenience when hanging packaging bags. Operators do not need to manually adjust the state of hook 21; they only need to hold the hanging ring of the packaging bag and push it directly onto hook 21 from bottom to top. When the hanging ring contacts the movable part 212, the upward pushing force overcomes the elastic force of the elastic element 213, forcing the movable part 212 to rotate upward around the pin axis and open a channel. After the hanging ring successfully passes the movable part 212, it loses the pushing force of the hanging ring, and the movable part 212 will quickly spring back to its original position under the action of the elastic element 213, blocking the hanging ring from below, thereby preventing the hanging ring from slipping off hook 21.

[0041] Therefore, based on Embodiment 1, by introducing a movable part 212 with a self-locking function, rapid and unidirectional installation of hanging rings for large-sized packaging bags is achieved. It combines the two actions of hooking and locking into a simple upward pushing action, so that when the operator installs one hanging ring onto the hook 21 and then installs other hanging rings, the already installed hanging rings are less likely to detach from the hook 21. This reduces the likelihood of one hanging ring detaching after installation, thus simplifying the installation process of multiple hanging rings, making the operation more convenient and efficient, and helping to reduce manual operation time during the bagging process.

[0042] The above are optional embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rapid bag-clamping mechanism for granules applicable to two different sizes, disposed on the outside of a hopper (6), characterized in that: It includes a first bag clamping assembly (1) and a second bag clamping assembly (2). The first bag clamping assembly (1) is used to be disposed at the discharge port of the hopper (6) and to press the opening of a first-sized packaging bag against the discharge port of the hopper (6). The second bag clamping assembly (2) is disposed on the outside of the first bag clamping assembly (1) and to hang a second-sized packaging bag at the discharge port of the hopper (6).

2. The rapid bag-clamping mechanism for granules applicable to two different diameters according to claim 1, characterized in that: The first bag clamping assembly (1) includes two rotatably configured clamps (11) and a first power telescopic member (12) connected between the two clamps (11). The fixed end of the first power telescopic member (12) is rotatably connected to one of the clamps (11), and the movable end of the first power telescopic member (12) is rotatably connected to the other clamp (11). The first power telescopic member (12) is used to drive the two clamps (11) to press against the two sides of the discharge port of the hopper (6).

3. The rapid bag-clamping mechanism for granules applicable to two different sizes according to claim 2, characterized in that: The gripper (11) includes two swing arms (111), a connecting block (112) connected to each of the swing arms (111), and a clamping member (113) connected between the two connecting blocks (112). The swing arms (111) are rotatably arranged, and the clamping member (113) is used to abut against the hopper (6). When both clamping members (113) abut against the hopper (6), the connecting block (112) connected to one of the clamping members (113) and the connecting block (112) connected to the other clamping member (113) are spaced apart.

4. The rapid bag-clamping mechanism for granules applicable to two different sizes according to claim 3, characterized in that: The clamping member (113) is a flexible band.

5. The rapid bag-clamping mechanism for granules applicable to two different sizes according to claim 1, characterized in that: The second bag clamping assembly (2) includes a plurality of hooks (21) arranged in a ring at intervals, and each hook (21) is used to attach a hanging ring on the packaging bag.

6. The rapid bag-clamping mechanism for granules applicable to two different diameters according to claim 5, characterized in that: The hook (21) is provided with a mounting base (3) on its outer side. The hook (21) is rotatably connected to the mounting base (3). The mounting base (3) is provided with a second power telescopic member (4). The two ends of the second power telescopic member (4) are respectively connected to the mounting base (3) and the hook (21). The second power telescopic member (4) is used to drive the hook (21) to rotate.

7. A rapid bag-clamping mechanism for granules applicable to two different sizes, as described in claim 6, is characterized in that: The mounting base (3) is provided with a baffle (31), which is located on the rotation path of the hook (21), and the baffle (31) is provided with a clearance groove (311) for the hook (21) to pass through.

8. A rapid bag-clamping mechanism for granules applicable to two different sizes, as described in claim 6, is characterized in that: The mounting base (3) is provided with a third power telescopic member (5) on its outer side. The movable end of the third power telescopic member (5) is connected to the mounting base (3). The third power telescopic member (5) is used to drive the mounting base (3) to rise and fall.

9. A rapid bag-clamping mechanism for granules applicable to two different sizes, as described in claim 7, is characterized in that: The hook (21) includes a fixed part (211), a movable part (212), and an elastic element (213). The fixed part (211) is rotatably connected to the mounting base (3). The fixed part (211) is connected to the second power telescopic member (4). The movable part (212) is rotatably connected to the fixed part (211). The elastic element (213) is connected to the fixed part (211) and the movable part (212) respectively.

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