A bag opening mechanism for a bag packaging machine

Abstract

This application relates to an opening mechanism for a pre-packaging bag machine, belonging to the technical field of pre-packaging bag machines. It includes a vertical rod and a support plate fixed vertically to the upper part of the vertical rod. An extension plate is fixedly mounted on one vertical surface of the support plate. Two suction cup holders are arranged opposite each other below the extension plate. Negative pressure suction cups are fixed on the sides of the two suction cup holders that are close to each other. A driving component is provided on the extension plate to drive the two suction cup holders to slide back and forth in the direction of their closeness. A fixed rod is slidably mounted on the side of the support plate away from the vertical rod, and a power component is installed to drive the fixed rod to slide. The length direction of the fixed rod is perpendicular to the axis of the vertical rod, and the sliding direction is parallel to the axis of the vertical rod. An opening assembly is provided on the fixed rod between the two suction cup holders. This application greatly reduces the space occupied by the opening mechanism on the pre-packaging bag machine, so that the pre-packaging bag machine does not need to reserve too much space to accommodate related components, thereby effectively reducing the overall size of the pre-packaging bag machine.

Description

Technical Field

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

[0002] Zipper bags are a common type of sealed plastic bag. They have zippers on both sides of the upper interior of the bag opening. To use them, simply press the zippers on both sides of the bag opening together. To open them, simply pull open the zippers that lock on both sides. The zippers on these bags are usually positioned a certain distance from the bag opening. Since automatic bag packaging machines are fully automatic, when packaging zipper bags on an automatic packaging machine, the bag opening needs to be opened first before filling.

[0003] In related technologies, a zipper bag opening mechanism mainly consists of a frame and a lifting mechanism, a bag suction mechanism, a bag suction drive mechanism, a bag opening mechanism, and a bag opening drive mechanism mounted on the frame. The bag suction mechanism includes a pair of suction cup frames arranged opposite each other, with suction cups mounted on the frames. The bag suction drive mechanism drives the suction cups to move closer or further apart. The bag opening mechanism is located between the pair of suction cup frames and consists of a first clamp assembly and a second clamp assembly that cooperate with each other. The lifting mechanism can drive the bag opening mechanism to move up and down. The frame includes a hollow column and a fixed base, a first connecting plate, and a second connecting plate mounted on it. The components are connected in a specific manner. The lifting mechanism includes a cam connecting mechanism and a push rod. The push rod passes through the hollow column, and its lower end is connected to the cam connecting mechanism, while its upper end is connected to the first connecting plate.

[0004] In the aforementioned related technologies, the cam connecting mechanism and push rod are located below the frame and occupy a significant amount of space. This means that when installing this bag-opening mechanism on a bag packaging machine, sufficient space needs to be reserved to accommodate the cam connecting mechanism and push rod. This results in an increase in the overall size of the bag packaging machine. The increased size not only requires more production space but also increases manufacturing costs. Furthermore, the larger size may affect the machine's layout and operational flexibility within the production environment. Therefore, there is considerable room for improvement in this bag-opening mechanism. Utility Model Content

[0005] The purpose of this application is to provide a bag opening mechanism for a bag packaging machine, which solves the problem that the lifting mechanism occupies a lot of space in the above-mentioned related technologies, affecting the size and cost of the bag packaging machine.

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

[0007] A bag-opening mechanism for a pre-packaging machine includes a vertical rod and a support plate fixed vertically to the upper part of the vertical rod. An extension plate is fixedly mounted on one vertical surface of the support plate. Two suction cup holders are arranged opposite each other below the extension plate. Negative pressure suction cups are fixed on the sides of the two suction cup holders that are close to each other. A driving component is provided on the extension plate to drive the two suction cup holders to slide back and forth in the direction of closeness. A fixed rod is slidably mounted on the side of the support plate away from the vertical rod, and a power component is installed to drive the fixed rod to slide. The length direction of the fixed rod is perpendicular to the axis of the vertical rod, and the sliding direction is parallel to the axis of the vertical rod. A bag-opening assembly is provided on the fixed rod between the two suction cup holders.

[0008] By adopting the above technical solution, the key structures of the bag-opening mechanism of the bag-feeding packaging machine of this application, such as the power component that drives the fixed rod to slide, are located on the side of the support plate away from the vertical rod. This significantly reduces the space occupied by the bag-opening mechanism on the bag-feeding packaging machine, eliminating the need for excessive space to accommodate related components and effectively reducing the overall size of the machine. This reduction in size not only means that the equipment can occupy less production space, improving the utilization rate of the production space, but also significantly reduces the manufacturing cost of the equipment.

[0009] Optionally, the driving component includes a pneumatic finger fixed to the extension plate in a horizontal direction, and the pneumatic finger is provided with two pneumatic plates that can slide towards each other, with the far sides of the two pneumatic plates fixedly connected to the opposite sides of the two suction cup frames.

[0010] By adopting the above technical solution, the driving component is configured as a pneumatic finger fixed horizontally to the extension plate, and two pneumatic plates that can slide towards each other on it. The pneumatic plates are fixedly connected to the suction cup frame. This design has many advantages. As a mature and commonly used driving structure, the pneumatic finger operates stably and reliably, and can precisely control the sliding of the pneumatic plates, thereby driving the suction cup frame to move closer or further apart, realizing the suction and release operation of the negative pressure suction cup on the packaging bag. The action response is rapid and highly accurate.

[0011] Optionally, the power component includes a transmission rod whose lower end is rotatably connected to the upper side of the fixed rod, and a power motor fixed horizontally on the side of the support plate away from the fixed rod. The output shaft end of the power motor passes through the support plate and extends to the top of the fixed rod. An intermediate rod is fixed on the outer periphery of the output shaft of the power motor. The end of the intermediate rod away from the output shaft of the power motor is rotatably connected to the upper end of the transmission rod away from the fixed rod. The rotation surfaces of the intermediate rod and the transmission rod are parallel to each other.

[0012] By adopting the above technical solution, the power motor is fixed horizontally to the side of the support plate, resulting in a compact and reasonable structural layout that does not occupy excessive space. The output shaft of the power motor is connected to the transmission rod via an intermediate rod, and the rotating surfaces of the intermediate rod and the transmission rod are parallel to each other. This connection method can smoothly and efficiently convert the rotational motion of the power motor into the linear up-and-down motion of the transmission rod driving the fixed rod. The transmission process is precise and stable, effectively ensuring the reliability of the lifting action of the bag opening assembly. At the same time, this transmission structure is relatively simple and direct, reducing intermediate transmission links, lowering energy loss and the possibility of failure, and improving the operating efficiency and service life of the entire bag opening mechanism.

[0013] Optionally, a protective cover for protecting the power component is fixed on the support plate, and the protective cover covers the outer side of the power component.

[0014] By adopting the above technical solutions, the protective cover can provide reliable protection for the power components, effectively blocking external dust, debris and other contaminants from entering the interior of the power components, avoiding interference from these impurities on the operation of the power motor, reducing the risk of motor failure caused by impurities, and thus extending the service life of the power components.

[0015] Optionally, the bag opening assembly includes two inner clamping rods rotatably mounted on a fixed rod, and a first power source that drives the two inner clamping rods to rotate towards and away from each other. The two inner clamping rods are located between two suction cup frames. A vertically downward outer clamping rod is rotatably mounted on the opposite sides of the two inner clamping rods. A second power source is provided on the inner clamping rods to drive the outer clamping rods to reciprocate towards the inner clamping rods.

[0016] By adopting the above technical solution, two inner clamping rods are rotatably mounted on a fixed rod between two suction cup frames. Driven by a first power source, they rotate towards and away from each other, allowing for flexible adjustment of the distance between the two inner clamping rods to precisely adapt to the clamping requirements of packaging bags of different sizes, thus improving the versatility of the bag opening mechanism. A vertically downward-facing outer clamping rod is rotatably mounted on the opposite side of the inner clamping rods, and driven by a second power source, it reciprocates. This allows the outer and inner clamping rods to work together to clamp and release the opening edge of the packaging bag, resulting in a more secure clamping action and ensuring a stable and reliable bag opening process. This combination design of inner and outer clamping rods makes the bag opening assembly more flexible and efficient in operation, better fulfilling the bag opening task and providing strong support for subsequent packaging and filling processes.

[0017] Optionally, the second power source includes a second cylinder and a second connecting rod coaxially fixed with the hydraulic rod of the second cylinder. A protrusion is fixed on the side of the outer clamping rod away from the inner clamping rod. The protrusion is rotatably connected to the end of the second connecting rod away from the second cylinder. The side of the second cylinder away from the second connecting rod is rotatably connected to the inner clamping rod.

[0018] By adopting the above technical solution, when the packaging bag needs to be clamped, the second cylinder is activated, driving the outer clamping rod to rotate closer to the inner clamping rod via the second connecting rod, thus achieving stable clamping; when releasing, it rotates in the opposite direction. This design makes the movement of the outer clamping rod precise, rapid, and powerful, and can better cooperate with the inner clamping rod to complete the clamping operation on the opening edge of the packaging bag, ensuring the reliability of the bag opening process and reducing bag opening failures caused by insecure clamping.

[0019] Optionally, the first power source includes a connector, a first cylinder, and a first connecting rod coaxially and fixedly connected to the hydraulic rod of the first cylinder. A first protrusion is fixedly provided on the lower side of the fixed rod, and the side of the first cylinder away from the first connecting rod is rotatably connected to the first protrusion. The upper ends of the two inner clamping rods are rotatably connected to the fixed rod, and the end of the first connecting rod away from the first cylinder is rotatably connected to the middle part of one of the two inner clamping rods away from the vertical rod. The connector is used to connect the two inner clamping rods. When the inner clamping rod away from the vertical rod rotates, it drives the inner clamping rod close to the vertical rod to rotate through the connector.

[0020] By adopting the above technical solution, the first cylinder is rotatably connected to the lower side of the fixed rod via the first protrusion, and the first connecting rod is rotatably connected to the middle of the inner clamping rod away from the vertical rod. This layout structure is compact, effectively utilizes space, and reduces the overall area occupied by the device. The two inner clamping rods are connected by a connector, so that when the inner clamping rod away from the vertical rod rotates, it can drive the inner clamping rod closer to the vertical rod to rotate synchronously through the connector, achieving linkage control of the two inner clamping rods and ensuring consistency and coordination of the actions.

[0021] Optionally, anti-slip teeth are fixed on the opposite sides of the lower part of the two inner clamping rods.

[0022] By adopting the above technical solution, during the bag opening process, the inner clamping rod needs to clamp the packaging bag. The anti-slip teeth greatly increase the friction between the inner clamping rod and the packaging bag. When the inner clamping rod clamps the packaging bag, the anti-slip teeth will press against the surface of the packaging bag, effectively preventing the packaging bag from sliding or shifting during the clamping process, ensuring the firmness and stability of the clamping.

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

[0024] The bag-opening mechanism of this application's bag-packing machine has key structures such as the power component that drives the fixed rod to slide, located on the side of the support plate away from the vertical rod. This significantly reduces the space occupied by the bag-opening mechanism on the bag-packing machine, eliminating the need for excessive space to accommodate related components and effectively reducing the overall size of the machine. This reduced size not only means the equipment occupies less production space, improving space utilization, but also significantly lowers manufacturing costs. Attached Figure Description

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

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

[0027] Figure 2 This is a partial cross-sectional structural diagram illustrating the installation and assembly of the power components in an embodiment of this application;

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

[0029] Figure 4 This is a partial structural diagram illustrating the installation and assembly of the first power source in an embodiment of this application;

[0030] Figure 5 This is a partial structural diagram illustrating the installation and assembly of the second power source in an embodiment of this application.

[0031] In the diagram, 1. Vertical rod; 11. Support plate; 12. Extension plate; 13. Fixing rod; 131. First protrusion; 14. Power component; 141. Transmission rod; 142. Power motor; 143. Intermediate rod; 15. Protective cover; 2. Clamping assembly; 21. Suction cup frame; 22. Negative pressure suction cup; 23. Driving component; 231. Pneumatic finger; 232. Pneumatic plate; 3. Bag opening assembly; 31. Inner clamping rod; 311. Anti-slip teeth; 32. First power source; 321. First cylinder; 322. First connecting rod; 33. Outer clamping rod; 331. Protrusion; 34. Second power source; 341. Second cylinder; 342. Second connecting rod; 35. Connecting component; 351. Connecting rod. Detailed Implementation

[0032] The present application will be further described in detail below with reference to all the accompanying drawings.

[0033] Example:

[0034] Reference Figure 1 and Figure 2A bag opening mechanism for a bag packaging machine includes a vertical rod 1 and a support plate 11 fixed vertically on the upper part of the vertical rod 1. An extension plate 12 is integrally formed on one vertical surface of the support plate 11. A clamping assembly 2 is provided below the extension plate 12. The clamping assembly 2 includes two suction cup frames 21 disposed opposite to each other below the extension plate 12. Two negative pressure suction cups 22 are fixed on the sides of the two suction cup frames 21 that are close to each other. A driving member 23 is provided on the extension plate 12 to drive the two suction cup frames 21 to slide back and forth in the direction of closeness to each other.

[0035] A fixed rod 13 is slidably provided on the side of the support plate 11 away from the vertical rod 1, and a power component 14 is installed to drive the fixed rod 13 to slide. The length direction of the fixed rod 13 is perpendicular to the axis of the vertical rod 1, and the sliding direction is parallel to the axis of the vertical rod 1. A bag opening assembly 3 is provided on the fixed rod 13 between the two suction cup frames 21.

[0036] Reference Figure 2 The power component 14 includes a transmission rod 141 whose lower end is rotatably connected to the upper side of the fixed rod 13, and a power motor 142 fixed in the horizontal direction on the side of the support plate 11 away from the fixed rod 13. A protective cover 15 for protecting the power component 14 is fixed on the support plate 11. The protective cover 15 covers the outer side of the power component 14. The output shaft end of the power motor 142 passes through the support plate 11 and extends to the top of the fixed rod 13.

[0037] An intermediate rod 143 is fixed on the outer periphery of the output shaft of the power motor 142. The end of the intermediate rod 143 away from the output shaft of the power motor 142 is rotatably connected to the upper end of the transmission rod 141 away from the fixed rod 13. The rotation surfaces of the intermediate rod 143 and the transmission rod 141 are parallel to each other. The power motor 142 drives the intermediate rod 143 and the transmission rod 141 to rotate, thereby driving the fixed rod 13 to move up and down, and thus driving the bag opening assembly 3 on the fixed rod 13 to move up and down.

[0038] Reference Figure 3 The driving component 23 includes a pneumatic finger 231 fixedly mounted on the extension plate 12 in the horizontal direction. The pneumatic finger 231 is provided with two pneumatic plates 232 that can slide towards each other. The sides of the two pneumatic plates 232 that are far apart are fixedly connected to the sides of the two suction cup frames 21 that are opposite to each other. The pneumatic finger 231 is a conventional driving structure, which will not be described in detail here.

[0039] Reference Figure 4 and Figure 5The bag opening assembly 3 includes two inner clamping rods 31 rotatably mounted on the fixed rod 13, and a first power source 32 that drives the two inner clamping rods 31 to rotate towards and away from each other. The two inner clamping rods 31 are located between the two suction cup frames 21. Anti-slip teeth 311 are integrally formed on the opposite sides of the lower part of the two inner clamping rods 31, so that the inner clamping rods 31 and the outer clamping rods 33 are more firmly clamped when they rotate towards each other to clamp the edge of the opening of the packaging bag. A vertically downward outer clamping rod 33 is rotatably mounted on the opposite sides of the two inner clamping rods 31, and a second power source 34 is provided on the inner clamping rods 31 to drive the outer clamping rods 33 to reciprocate towards the inner clamping rods 31.

[0040] Reference Figure 4 and Figure 5 The first power source 32 includes a connector 35, a first cylinder 321, and a first connecting rod 322 coaxially and fixedly connected to the hydraulic rod of the first cylinder 321. A first protrusion 131 is fixedly provided on the lower side of the fixed rod 13, and the side of the first cylinder 321 away from the first connecting rod 322 is rotatably connected to the first protrusion 131.

[0041] The upper ends of the two inner clamping rods 31 are rotatably connected to the fixed rod 13. The end of the first connecting rod 322 away from the first cylinder 321 is rotatably connected to the middle part of one of the two inner clamping rods 31 away from the vertical rod 1. The connecting member 35 is specifically a connecting rod 351, which is used to connect the two inner clamping rods 31. The two ends of the connecting rod 351 are rotatably connected to the upper parts of the two inner clamping rods 31 respectively. When the inner clamping rod 31 away from the vertical rod 1 rotates, the inner clamping rod 31 close to the vertical rod 1 is driven to rotate through the connecting member 35.

[0042] Reference Figure 4 and Figure 5 The second power source 34 includes a second cylinder 341 and a second connecting rod 342 coaxially fixed with the hydraulic rod of the second cylinder 341. The outer clamping rod 33 has an integrally formed protrusion 331 on the side away from the inner clamping rod 31. The protrusion 331 is rotatably connected to the end of the second connecting rod 342 away from the second cylinder 341. The side of the second cylinder 341 away from the second connecting rod 342 is rotatably connected to the inner clamping rod 31.

[0043] The implementation principle of this application embodiment is as follows:

[0044] When using this bag opening mechanism, first place the upper opening edge of the packaging bag between the two negative pressure suction cups 22. Then, the pneumatic finger 231 in the drive unit 23 works, driving the two pneumatic plates 232 to slide towards each other. Since the pneumatic plates 232 are fixed to the suction cup frame 21, the two negative pressure suction cups 22 are brought closer to each other and adsorbed on the zipper bag near the bag opening.

[0045] Next, the power motor 142 in the power component 14 starts, and its output shaft drives the intermediate rod 143 to rotate. The intermediate rod 143 then drives the transmission rod 141 to rotate. Since the lower end of the transmission rod 141 is rotatably connected to the fixed rod 13, it drives the fixed rod 13 and the bag opening assembly 3 on it to slide down to the zipper bag opening. At this time, the two inner clamping rods 31 are located inside the zipper bag, and the two outer clamping rods 33 open under the drive of the second cylinder 341 of the second power source 34, and are located on the outside of the zipper bag respectively.

[0046] Then, the second cylinder 341 continues to operate, causing the two outer clamping rods 33 to rotate in opposite directions, and the two edges of the zipper bag opening are clamped by the corresponding outer clamping rods 33 and inner clamping rods 31 respectively; finally, the negative pressure suction cup 22 is driven by the driving component 23 to further open the zipper bag opening, thus realizing the opening of the zipper bag opening and preparing for subsequent packaging and filling.

[0047] Unless otherwise defined, the terms or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar words used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "a" or "one," and similar words do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising," "including," and similar words mean that the element or object preceding "comprising" encompasses the element or object listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0048] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A bag opening mechanism for a bag packaging machine, comprising a vertical rod (1) and a support plate (11) fixedly mounted vertically on the upper part of the vertical rod (1), an extension plate (12) fixedly mounted on one side of the vertical surface of the support plate (11), two suction cup frames (21) being arranged opposite each other below the extension plate (12), a negative pressure suction cup (22) being fixedly mounted on the side of the two suction cup frames (21) that are close to each other, and a driving member (23) being provided on the extension plate (12) for driving the two suction cup frames (21) to slide back and forth in the direction of closeness to each other; Its features are, The support plate (11) has a fixed rod (13) slidably mounted on the side away from the vertical rod (1), and a power component (14) that drives the fixed rod (13) to slide. The length direction of the fixed rod (13) is perpendicular to the axis of the vertical rod (1), and the sliding direction is parallel to the axis of the vertical rod (1). The fixed rod (13) is provided with a bag opening assembly (3) located between the two suction cup frames (21).

2. The bag opening mechanism of a bag packaging machine according to claim 1, characterized in that, The drive unit (23) includes a pneumatic finger (231) fixed in the horizontal direction on the extension plate (12). The pneumatic finger (231) is provided with two pneumatic plates (232) that can slide towards each other. The sides of the two pneumatic plates (232) that are far apart are fixedly connected to the sides of the two suction cup frames (21) that are opposite to each other.

3. The bag opening mechanism of a bag-packing machine according to claim 1, characterized in that, The power component (14) includes a transmission rod (141) whose lower end is rotatably connected to the upper side of the fixed rod (13), and a power motor (142) fixed in the horizontal direction on the side of the support plate (11) away from the fixed rod (13). The output shaft end of the power motor (142) passes through the support plate (11) and extends to the top of the fixed rod (13). An intermediate rod (143) is fixed on the outer periphery of the output shaft of the power motor (142). The end of the intermediate rod (143) away from the output shaft of the power motor (142) is rotatably connected to the upper end of the transmission rod (141) away from the fixed rod (13). The rotation surfaces of the intermediate rod (143) and the transmission rod (141) are parallel to each other.

4. The bag opening mechanism of a bag packaging machine according to claim 1, characterized in that, The support plate (11) is fixed with a protective cover (15) to protect the power component (14), and the protective cover (15) covers the outer side of the power component (14).

5. The bag opening mechanism of a bag packaging machine according to claim 1, characterized in that, The bag opening assembly (3) includes two inner clamping rods (31) that are rotatably mounted on a fixed rod (13), and a first power source (32) that drives the two inner clamping rods (31) to rotate in opposite directions. The two inner clamping rods (31) are located between two suction cup frames (21). A vertically downward outer clamping rod (33) is rotatably mounted on the opposite sides of the two inner clamping rods (31). A second power source (34) is provided on the inner clamping rod (31) to drive the outer clamping rod (33) to reciprocate towards the inner clamping rod (31).

6. The bag opening mechanism of a bag-packing machine according to claim 5, characterized in that, The second power source (34) includes a second cylinder (341) and a second connecting rod (342) coaxially fixed with the hydraulic rod of the second cylinder (341). A protrusion (331) is fixed on the side of the outer clamping rod (33) away from the inner clamping rod (31). The protrusion (331) is rotatably connected to the end of the second connecting rod (342) away from the second cylinder (341). The side of the second cylinder (341) away from the second connecting rod (342) is rotatably connected to the inner clamping rod (31).

7. The bag opening mechanism of a bag packaging machine according to claim 5, characterized in that, The first power source (32) includes a connector (35), a first cylinder (321), and a first connecting rod (322) coaxially fixedly connected to the hydraulic rod of the first cylinder (321). A first protrusion (131) is fixedly provided on the lower side of the fixed rod (13). The side of the first cylinder (321) away from the first connecting rod (322) is rotatably connected to the first protrusion (131). The upper ends of the two inner clamping rods (31) are rotatably connected to the fixed rod (13). The end of the first connecting rod (322) away from the first cylinder (321) is rotatably connected to the middle part of one of the two inner clamping rods (31) away from the vertical rod (1). The connecting piece (35) is used to connect the two inner clamping rods (31). When the inner clamping rod (31) away from the vertical rod (1) rotates, it drives the inner clamping rod (31) close to the vertical rod (1) to rotate through the connecting piece (35).

8. The bag opening mechanism of a bag-packing machine according to claim 5, characterized in that, Anti-slip teeth (311) are fixed on the opposite sides of the lower part of the two inner clamping rods (31).

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