A packaging bag exhaust mechanism

Abstract

The utility model relates to a kind of packaging bag exhaust mechanism, including mounting bracket, a pair of liftable pressure wheel components being arranged below mounting bracket, a pair of liftable pressure wheel components are driven from left and right direction by embracing and clamping component and are clamped packaging bag, liftable pressure wheel component includes the pressure wheel shaft of longitudinal arrangement, multiple first pressure wheels and multiple second pressure wheels are coaxially arranged on pressure wheel shaft, multiple first pressure wheels and multiple second pressure wheels are staggered arrangement along the axis direction of pressure wheel shaft, the wheel diameter of first pressure wheel is greater than the wheel diameter of second pressure wheel, exhaust passage is formed between adjacent two first pressure wheels. Multiple first pressure wheels and multiple second pressure wheels are staggered arrangement, and the wheel diameter of first pressure wheel is greater than the wheel diameter of second pressure wheel, so that packaging bag is compressed bag mouth by pressure wheel at the same time, and uniform exhaust passage is formed, ensure that the space in packaging bag is communicated with atmosphere during the process of exhausting, real-time exhaust, avoid the situation that packaging bag appears expansion during the process of exhausting, guarantee the flatness of packaging bag, avoid damaging bag mouth.

Description

Technical Field

[0001] This utility model relates to a packaging bag exhaust mechanism. Background Technology

[0002] During material filling, the material falls from a height, easily introducing air. Sealing the bag before the air is expelled is inconvenient for transportation and storage. Therefore, after filling, excess air is manually squeezed out of the bag opening before it is sealed in a sealing machine. This method requires considerable manual labor, and the bag must be manually flattened before being sent to the sealing machine, posing a certain degree of danger. Therefore, to reduce manual labor, operational risks, and improve efficiency, utilizing mechanical structures for air expulsion has become a new trend. Common air expulsion mechanisms on the market mimic manual squeezing, using physical compression at the bag opening, such as flat plates or rollers, for simple lateral compression. While simple in structure, this method is ineffective at expelling air. Utility Model Content

[0003] This utility model addresses the problems existing in the prior art by providing a packaging bag exhaust mechanism that is reasonably designed to quickly exhaust residual gas inside the packaging bag and improve the flatness of the packaging bag.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a packaging bag exhaust mechanism, including a mounting frame and a pair of liftable pressure roller assemblies disposed below the mounting frame. The pair of liftable pressure roller assemblies are driven by a clamping assembly to clamp the packaging bag from the left and right directions. The liftable pressure roller assembly includes a pressure roller shaft arranged longitudinally. Multiple first pressure rollers and multiple second pressure rollers are coaxially arranged on the pressure roller shaft. The multiple first pressure rollers and multiple second pressure rollers are staggered along the axial direction of the pressure roller shaft. The diameter of the first pressure roller is larger than the diameter of the second pressure roller, and an exhaust channel is formed between two adjacent first pressure rollers.

[0005] Furthermore, the clamping assembly includes a pair of parallelogram mechanisms symmetrically distributed on the left and right, and a pair of liftable pressure roller assemblies are respectively disposed at the bottom of the pair of parallelogram mechanisms.

[0006] Furthermore, the parallelogram mechanism includes a lifting mounting base, a pair of active connecting rods and a pair of passive connecting rods. The pair of passive connecting rods are arranged parallel to the outside of the pair of active connecting rods. The pair of active connecting rods and the pair of passive connecting rods are distributed on the front and rear sides of the lifting mounting base. The upper ends of the active connecting rods and the passive connecting rods are hinged to the mounting frame, and the lower ends of the active connecting rods and the passive connecting rods are hinged to the lifting mounting base.

[0007] Furthermore, a power drive component is provided between the pair of parallelogram mechanisms. The power drive component includes a pair of drive cylinders symmetrically distributed on the left and right. The cylinder rods of the pair of drive cylinders extend to the left and right sides respectively, and the cylinder rods of the pair of drive cylinders are respectively hinged to the active connecting rod located on the same side.

[0008] Furthermore, a cylinder lock seat is provided directly below the center of the mounting bracket, and a pair of drive cylinders are respectively hinged and mounted on the cylinder lock seat.

[0009] Furthermore, the liftable pressure roller assembly also includes a lifting cylinder and a pressure roller mounting base. The lifting cylinder is vertically mounted on the lifting mounting base, the cylinder rod of the lifting cylinder extends downward and is connected to the pressure roller mounting base, and the pressure roller shaft is located on the upper inner side of the pressure roller mounting base.

[0010] Furthermore, both the first pressure roller and the second pressure roller are nylon rollers.

[0011] Furthermore, a bag-pressing assembly is provided between the mounting frame and a pair of liftable pressure roller assemblies, the bag-pressing assembly being used to press down the opening of the packaging bag from the left and right directions.

[0012] Furthermore, the bag-pressing assembly includes a pair of bag-pressing cylinders symmetrically distributed on the left and right, with the cylinder rods of the pair of bag-pressing cylinders extending towards each other in the horizontal direction, and bag-pressing blocks installed on the cylinder rods of the bag-pressing cylinders.

[0013] Furthermore, the bottom of the mounting frame is provided with a pair of L-shaped cylinder mounting frames symmetrically distributed on the left and right, and a pair of bag-pressing cylinders are respectively fixedly installed at the bottom of the horizontal side of the pair of cylinder mounting frames.

[0014] Compared with the prior art, the present invention has the following advantages: The present invention has a reasonable structural design. The liftable pressure roller assembly adopts multiple first pressure rollers and multiple second pressure rollers arranged in an alternating manner, and the diameter of the first pressure roller is larger than that of the second pressure roller. This allows the packaging bag to be pressed tightly at the bag opening by the pressure rollers, while simultaneously forming a uniformly distributed exhaust channel. This ensures that the space inside the packaging bag is connected to the atmospheric environment during the exhaust process, allowing for real-time exhaust and preventing the packaging bag from expanding during the exhaust process. This ensures the flatness of the packaging bag and avoids damage to the bag opening. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of an embodiment of this utility model;

[0016] Figure 2 This is a three-dimensional structural schematic diagram of an embodiment of the present utility model;

[0017] Figure 3 This is a top view schematic diagram of the liftable pressure roller assembly in an embodiment of this utility model;

[0018] Figure 4 This is a schematic diagram of the exhaust process according to an embodiment of the present invention;

[0019] Figure 5 This is a schematic diagram showing the state changes of the packaging bag during exhaust in an embodiment of this utility model.

[0020] In the picture:

[0021] 1-Mounting bracket; 2-Cylinder mounting bracket; 3-Drive cylinder; 4-Active connecting rod; 5-Driven connecting rod; 6-Bag pressing cylinder; 7-Lifting cylinder; 8-Lifting mounting seat; 9-Pressure roller shaft; 10-Pressure roller mounting seat; 11-Cylinder lock seat; 12-Liftable pressure roller assembly; 13-First pressure roller; 14-Second pressure roller; 15-Exhaust channel; 16-Parallelogram mechanism; 17-Packaging bag; 18-Bag pressing block. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] like Figures 1-5As shown, this utility model discloses a packaging bag venting mechanism, including a horizontally arranged mounting frame 1 and a pair of liftable pressure roller assemblies 12 arranged below the mounting frame 1. The pair of liftable pressure roller assemblies 12 are symmetrically distributed on the left and right sides. The pair of liftable pressure roller assemblies 12 are driven by a clamping assembly to clamp the packaging bag from the left and right directions. Each liftable pressure roller assembly 12 includes a longitudinally arranged pressure roller shaft 9. Multiple first pressure rollers 13 and multiple second pressure rollers 14 are coaxially arranged on the pressure roller shaft 9. The multiple first pressure rollers 13 and multiple second pressure rollers 14 are staggered along the axial direction of the pressure roller shaft 9. The diameter of the first pressure roller 13 is larger than the diameter of the second pressure roller 14. An venting channel 15 is formed between two adjacent first pressure rollers 13 (located on the outer periphery of the second pressure roller). During operation, after the pressure rollers press down on the bag opening, the pressure rollers move downwards to squeeze, and the gas inside the packaging bag is discharged from the multiple venting channels, thus achieving venting. The liftable pressure roller assembly uses multiple first pressure rollers and multiple second pressure rollers arranged in an alternating pattern, with the diameter of the first pressure roller being larger than that of the second pressure roller. This allows the packaging bag to be pressed tightly at the opening by the pressure rollers while simultaneously forming evenly distributed exhaust channels. This ensures that the space inside the packaging bag is connected to the atmospheric environment during the exhaust process, allowing for real-time exhaust and preventing the packaging bag from expanding during the exhaust process. This ensures the flatness of the packaging bag and avoids damage to the bag opening.

[0025] In this embodiment, the clamping assembly includes a pair of parallelogram mechanisms 16 symmetrically distributed on the left and right, and a pair of liftable pressure roller assemblies 12 are respectively disposed at the bottom of the pair of parallelogram mechanisms 16. The pair of parallelogram mechanisms drive the pair of liftable pressure roller assemblies to clamp the packaging bag from the left and right directions.

[0026] In this embodiment, the parallelogram mechanism 16 includes a lifting mounting base 8, a pair of active connecting rods 4, and a pair of driven connecting rods 5. The lifting mounting base 8 is L-shaped and arranged longitudinally, and the liftable pressure roller assembly 12 is arranged on the lifting mounting base 8. The pair of driven connecting rods 5 are arranged parallel to the outside of the pair of active connecting rods 4. The pair of active connecting rods 5 and the pair of driven connecting rods 4 are distributed on the front and rear sides of the lifting mounting base 8. The upper ends of the active connecting rods 4 and the driven connecting rods 5 are hinged to the mounting frame 1 through spherical bearings, and the lower ends of the active connecting rods 4 and the driven connecting rods 5 are hinged to the lifting mounting base 8. The active connecting rods, the driven connecting rods, the lifting mounting base, and the mounting frame form a parallelogram mechanism.

[0027] In this embodiment, a power drive unit is provided between a pair of parallelogram mechanisms 16. The power drive unit includes a pair of drive cylinders 3 symmetrically distributed on the left and right. The cylinder rods of the pair of drive cylinders 3 extend to the left and right sides respectively, and the cylinder rods of the pair of drive cylinders 3 are respectively hinged to the active connecting rod 4 located on the same side. During operation, the extension and retraction of the cylinder rods of the pair of drive cylinders drives the active connecting rod to swing. When the active connecting rod swings, it drives the lifting mounting seat to move synchronously, and the lifting mounting seat drives the lifting pressure roller assembly to move synchronously.

[0028] In this embodiment, a cylinder lock seat 11 is provided directly below the center of the mounting bracket 1, and a pair of drive cylinders 3 are respectively hinged and mounted on the cylinder lock seat 11.

[0029] In this embodiment, the liftable pressure roller assembly 12 further includes a lifting cylinder 7 and a pressure roller mounting base 10. The lifting cylinder 7 is vertically mounted on the lifting mounting base 8, and the cylinder rod of the lifting cylinder 7 extends downward and is connected to the pressure roller mounting base 10. The pressure roller mounting base 10 is longitudinally arranged, and the pressure roller shaft 9 is located on the upper inner side of the pressure roller mounting base 10. The front and rear ends of the pressure roller shaft 9 are rotatably connected to the pressure roller mounting base 10 through bearings. Furthermore, the pressure roller mounting base 10 has a trapezoidal cross-section, with the hypotenuse located on the lower side.

[0030] In this embodiment, both the first pressure roller 13 and the second pressure roller 14 are nylon wheels.

[0031] In this embodiment, a bag pressing assembly is provided between the mounting frame 1 and a pair of liftable pressure roller assemblies 12. The bag pressing assembly is used to press down the bag opening of the packaging bag 17 from the left and right directions.

[0032] In this embodiment, the bag pressing assembly includes a pair of bag pressing cylinders 6 symmetrically distributed on the left and right. The cylinder rods of the pair of bag pressing cylinders 6 extend towards each other in the horizontal direction, and bag pressing blocks 18 are installed on the cylinder rods of the bag pressing cylinders.

[0033] In this embodiment, the bottom of the mounting frame 1 is provided with a pair of L-shaped cylinder mounting frames 2 symmetrically distributed on the left and right, and a pair of bag-pressing cylinders 6 are respectively fixedly installed at the bottom of the horizontal side of the pair of cylinder mounting frames 2.

[0034] In this embodiment, the mounting bracket of the exhaust mechanism is installed on the external guide bag structure (not shown in the figure) during use.

[0035] In this embodiment, the specific workflow is as follows: Figure 4 As shown: In the initial state, drive cylinder 3 extends, lifting cylinder 7 retracts, and bag-pressing cylinder 6 retracts. At this time, the exhaust mechanism is open, and the lifting pressure roller assembly is in the upper position. After the bag opening of the packaging bag 17 enters, a pair of bag-pressing cylinders 6 extend towards each other to press down on the bag opening, preventing the bag opening from retracting during subsequent exhaust. Then, drive cylinder 3 retracts first, expelling the upper part of the air from the bag opening. Immediately afterwards, lifting cylinder 7 extends, and the first and second pressure rollers press down to expel the remaining air, completing the exhaust process. It should be noted that the pressing action of the pressure rollers should be coordinated with the upward movement of the external lower conveyor belt (not shown in the figure) to avoid tearing the bag opening. If the bag opening is long, the bag-pressing cylinder 6 may not need to operate. The bag opening state during exhaust is shown in the diagram. Figure 5 As shown.

[0036] If this utility model discloses or relates to mutually fixedly connected parts or structural components, then, unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured using a casting process) (except where it is obviously impossible to use an integral forming process).

[0037] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in this utility model above include states or shapes that are similar to, close to, or approximate with them.

[0038] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A packaging bag venting mechanism, comprising a mounting frame and a pair of liftable pressure roller assemblies disposed below the mounting frame, wherein the pair of liftable pressure roller assemblies are driven by a clamping assembly to clamp the packaging bag from the left and right directions, characterized in that: The liftable pressure roller assembly includes a longitudinally arranged pressure roller shaft, on which multiple first pressure rollers and multiple second pressure rollers are coaxially arranged. The multiple first pressure rollers and multiple second pressure rollers are staggered along the axial direction of the pressure roller shaft. The diameter of the first pressure roller is larger than that of the second pressure roller, and an exhaust channel is formed between two adjacent first pressure rollers.

2. The packaging bag exhaust mechanism according to claim 1, characterized in that: The clamping assembly includes a pair of parallelogram mechanisms symmetrically distributed on the left and right, and a pair of liftable pressure roller assemblies are respectively disposed at the bottom of the pair of parallelogram mechanisms.

3. The packaging bag exhaust mechanism according to claim 2, characterized in that: The parallelogram mechanism includes a lifting mounting base, a pair of active connecting rods and a pair of driven connecting rods. The pair of driven connecting rods are arranged parallel to the outside of the pair of active connecting rods. The pair of active connecting rods and the pair of driven connecting rods are distributed on the front and rear sides of the lifting mounting base. The upper ends of the active connecting rods and the driven connecting rods are hinged to the mounting frame, and the lower ends of the active connecting rods and the driven connecting rods are hinged to the lifting mounting base.

4. The packaging bag exhaust mechanism according to claim 3, characterized in that: A power drive component is provided between a pair of parallelogram mechanisms. The power drive component includes a pair of drive cylinders symmetrically distributed on the left and right. The cylinder rods of the pair of drive cylinders extend to the left and right sides respectively, and the cylinder rods of the pair of drive cylinders are respectively hinged to the active connecting rod located on the same side.

5. The packaging bag exhaust mechanism according to claim 4, characterized in that: A cylinder lock seat is provided directly below the center of the mounting bracket, and a pair of drive cylinders are respectively hinged and mounted on the cylinder lock seat.

6. The packaging bag exhaust mechanism according to claim 3, characterized in that: The liftable pressure roller assembly also includes a lifting cylinder and a pressure roller mounting base. The lifting cylinder is vertically mounted on the lifting mounting base. The cylinder rod of the lifting cylinder extends downward and is connected to the pressure roller mounting base. The pressure roller shaft is located on the upper inner side of the pressure roller mounting base.

7. The packaging bag exhaust mechanism according to claim 1, characterized in that: Both the first and second pressure rollers are nylon wheels.

8. The packaging bag exhaust mechanism according to claim 1, characterized in that: A bag-pressing assembly is provided between the mounting frame and a pair of liftable pressure roller assemblies. The bag-pressing assembly is used to press down the opening of the packaging bag from the left and right directions.

9. A packaging bag exhaust mechanism according to claim 8, characterized in that: The bag-pressing assembly includes a pair of bag-pressing cylinders symmetrically distributed on the left and right. The cylinder rods of the pair of bag-pressing cylinders extend towards each other in the horizontal direction, and bag-pressing blocks are installed on the cylinder rods of the bag-pressing cylinders.

10. A packaging bag exhaust mechanism according to claim 9, characterized in that: The bottom of the mounting frame is provided with a pair of L-shaped cylinder mounting frames symmetrically distributed on the left and right, and a pair of bag-pressing cylinders are respectively fixedly installed at the bottom of the horizontal side of the pair of cylinder mounting frames.

Images