A bag opening device for a bagging machine

Abstract

The utility model relates to the technical field of packaging machinery and equipment, and in particular to a bag opening device for a bagging machine, comprising a first mounting frame, a first bag opening assembly, a second bag opening assembly, a first driving assembly and a second driving assembly, wherein the first bag opening assembly and the second bag opening assembly respectively comprise a mounting arm and at least one vacuum suction cup; the first bag opening assembly and the second driving assembly are both mounted on the first mounting frame; the second bag opening assembly is connected to the first driving assembly and swings under the drive of the first driving assembly; the first driving assembly is connected to the second driving assembly, and the first driving assembly and the second bag opening assembly run together in a straight line under the drive of the second driving assembly, so that the first bag opening assembly and the second bag opening assembly are close to or away from each other. Through the bag opening device, the problem that the synchronization of the existing bag opening mechanism is difficult to unify and the bag opening effect for special-shaped packaging bags is poor can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging machinery and equipment, in particular to a bag opening device for a bagging machine. Background Art

[0002] Bagging machines are machines that use pre-made bags to pack materials. They are completed by putting bags on materials, or packing materials into bags. Current bagging machines need to open the bags before putting materials into pre-made bags or putting pre-made bags on materials.

[0003] In the prior art, two suction cups arranged opposite to each other are generally used to open the bag. Specifically, when the packaging bag moves between the two suction cups, the two suction cups are driven by the driving assembly to move toward each other, and the suction cups suck the two sides of the packaging bag together, and then the two suction cups are driven by the driving assembly to move in opposite directions at the same time, thereby opening the bag. For example, in the prior art, a Chinese utility model patent document with a publication number of CN214085045U and an authorization announcement date of August 31, 2021 is proposed.

[0004] The bag opening mechanism in the prior art requires a relatively large stroke in actual use, and the synchronization of the bag opening mechanisms on both sides of the packaging bag is difficult to unify. Moreover, the bag opening mechanism can only open ordinary packaging bags, and has poor opening effect for special-shaped packaging bags, such as those with a triangular cross section. Summary of the invention

[0005] In order to solve the above technical problems, the utility model proposes a bag opening device for a bagging machine, which can effectively solve the problems that the synchronization of the existing bag opening mechanism is difficult to unify and the bag opening effect for special-shaped packaging bags is poor.

[0006] The utility model is realized by adopting the following technical solutions:

[0007] A bag opening device for a bagging machine includes a first mounting frame, a first bag opening assembly, a second bag opening assembly, a first drive assembly and a second drive assembly, wherein the first bag opening assembly and the second bag opening assembly each include a mounting arm and at least one vacuum suction cup; the first bag opening assembly and the second drive assembly are both mounted on the first mounting frame; the second bag opening assembly is connected to the first drive assembly and swings under the drive of the first drive assembly; the first drive assembly is connected to the second drive assembly, and the first drive assembly and the second bag opening assembly run together in a straight line under the drive of the second drive assembly, so that the first bag opening assembly and the second bag opening assembly are close to or away from each other.

[0008] The first driving assembly includes a driving component and a transmission component. The transmission component is connected to the second bag opening assembly and the driving component respectively to drive the second bag opening assembly to swing.

[0009] The first driving assembly also includes a second mounting frame, and the driving component and the transmission component are both assembled on the second mounting frame.

[0010] The driving component includes a driving cylinder mounted on a second mounting frame, and the transmission component includes a sliding block, a first connecting rod, a second connecting rod and a connecting arm; the sliding block is connected to the driving cylinder, and the mounting arm of the second bag opening assembly is axially connected to the sliding block through a connecting shaft; one end of the connecting arm is fixedly connected to the second mounting frame, and the other end is hinged to the first connecting rod, the other end of the first connecting rod is hinged to the second connecting rod, and the second connecting rod is fixedly connected to the mounting arm of the second bag opening assembly.

[0011] The second mounting frame is provided with a first slide rail, and the slide block is slidably connected to the first slide rail.

[0012] The second mounting frame is also provided with a limiting member for limiting the maximum moving distance of the sliding block.

[0013] The second driving assembly includes a driving motor, a rack and a gear meshing with the rack; the driving motor is mounted on the first mounting frame, the gear is mounted on the output shaft of the driving motor, and the rack is connected to the first driving assembly.

[0014] The first mounting frame is also provided with a second slide rail, one side of the rack is connected to the first driving assembly, and the other side is slidably connected to the second slide rail.

[0015] The bag opening device is used to open a packaging bag with a triangular cross section.

[0016] The first bag opening assembly is fixedly arranged on the first mounting frame via a supporting arm.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0018] 1. In the utility model, when it is necessary to open the bag, the second driving assembly drives the first driving assembly and the second bag opening assembly to move linearly in the direction close to the first bag opening assembly until the vacuum suction cups on the first bag opening assembly and the second bag opening assembly press and adsorb the packaging bag. At this time, the first driving assembly drives the second bag opening assembly to swing, so that the packaging bag is opened. Since the bag opening method is completed by the action of the second bag opening assembly, the first bag opening assembly is fixed and does not move, which can well solve the problem of the difficulty in unifying the synchronization of the first bag opening assembly and the second bag opening assembly in the prior art.

[0019] And because when the vacuum suction cup just absorbs the packaging bag, the first bag opening component and the second bag opening component are driven by the second driving component to approach each other, at this time, the second bag opening component has not swung, and the vacuum suction cup has a better effect of absorbing the packaging bag. When the absorption is completed and the bag needs to be opened, the bag opening is realized by the swinging mode of the second bag opening component, and the bag mouth can be opened in an arc form, with a good bag opening effect, which is more suitable for opening special-shaped packaging bags for packaging materials such as triangular cakes or sandwiches.

[0020] 2. In the utility model, the driving component includes a driving cylinder, and the transmission component includes a sliding block, a first connecting rod, a second connecting rod and a connecting arm. Through this structural arrangement, the swing of the second bag opening assembly is easier to control and the swing is more stable, and the structural arrangement is also more sophisticated.

[0021] 3. The sliding block is slidably connected to the first sliding rail, which can better limit the moving direction of the sliding block, and the first sliding rail can also provide good support for the sliding block.

[0022] 4. The setting of the limiter limits the maximum moving distance of the sliding block, so that in the initial state, the position of the vacuum suction cup in the second bag opening component can be better controlled, so that the adsorption surface of the vacuum suction cup matches the plane of the packaging bag, which can better adsorb the packaging bag and improve the adsorption effect.

[0023] 5. The setting of the second slide rail plays a good supporting and limiting role, which is convenient for improving the structural stability of the entire bag opening device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementations, wherein:

[0025] Figure 1 The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;

[0026] Figure 2 for Figure 1 Schematic diagram of the elevation structure;

[0027] Figure 3 The three-dimensional structure of the utility model is shown in FIG. Figure 2 ;

[0028] Figure 4 for Figure 3 Schematic diagram of the elevation structure;

[0029] Markings in the figure:

[0030] 1. First mounting frame, 2. First bag opening assembly, 3. Second bag opening assembly, 4. Mounting arm, 5. Vacuum suction cup, 6. Second mounting frame, 7. Driving cylinder, 8. Sliding block, 9. First connecting rod, 10. Second connecting rod, 11. Connecting arm, 12. First slide rail, 13. Driving motor, 14. Rack, 15. Gear, 16. Second slide rail, 17. Support arm. DETAILED DESCRIPTION

[0031] Example 1

[0032] As a basic embodiment of the utility model, the utility model includes a bag opening device for a bagging machine, including a first mounting frame 1, a first bag opening assembly 2, a second bag opening assembly 3, a first drive assembly and a second drive assembly. The first bag opening assembly 2 and the second bag opening assembly 3 each include a mounting arm 4 and at least one vacuum suction cup 5. The first bag opening assembly 2 and the second drive assembly are both mounted on the first mounting frame 1.

[0033] The second bag opening component 3 is connected to the first driving component and swings under the drive of the first driving component. The first driving component can be a conventional technical means in the art, such as a servo motor. The first driving component is connected to the second driving component, and the first driving component and the second bag opening component 3 run together along a straight line under the drive of the second driving component, so that the first bag opening component 2 and the second bag opening component 3 are close to each other or away from each other. If the second bag opening component 3 and the first bag opening component 2 are arranged one above and one below, the second driving component drives the second bag opening component 3 to move up and down; if the second bag opening component 3 and the first bag opening component 2 are arranged one left and one right, the second driving component drives the second bag opening component 3 to move left and right.

[0034] Example 2

[0035] As a preferred embodiment of the utility model, the utility model includes a bag opening device for a bagging machine, including a first mounting frame 1, a first bag opening assembly 2, a second bag opening assembly 3, a first drive assembly and a second drive assembly. The first bag opening assembly 2 and the second bag opening assembly 3 each include a mounting arm 4 and at least one vacuum suction cup 5. The first bag opening assembly 2 and the second drive assembly are both mounted on the first mounting frame 1.

[0036] The second bag opening component 3 is connected to the first driving component, and swings under the drive of the first driving component. Specifically, the first driving component includes a driving component and a transmission component, and the transmission component is respectively connected to the second bag opening component 3 and the driving component to drive the second bag opening component 3 to swing. Among them, the driving component, the transmission component and the connection relationship between each other can adopt conventional technical means in this field, such as a crank rocker mechanism. The first driving component is connected to the second driving component, and the first driving component and the second bag opening component 3 run together in a straight line under the drive of the second driving component, so that the first bag opening component 2 and the second bag opening component 3 are close to each other or away from each other. Specifically, the second driving component can be a conventional linear driving mechanism in this field, such as a driving cylinder. The second driving component can be connected to the second mounting bracket 6 of the first driving component.

[0037] Example 3

[0038] As another preferred embodiment of the utility model, the utility model includes a bag opening device for a bagging machine, including a first mounting frame 1, a first bag opening assembly 2, a second bag opening assembly 3, a first drive assembly and a second drive assembly. The first bag opening assembly 2 and the second bag opening assembly 3 each include a mounting arm 4 and at least one vacuum suction cup 5. The first bag opening assembly 2 and the second drive assembly are both mounted on the first mounting frame 1.

[0039] The second bag opening component 3 is connected to the first driving component and swings under the drive of the first driving component. The first driving component includes a second mounting frame 6, a driving component and a transmission component, and the transmission component is respectively connected to the second bag opening component 3 and the driving component to drive the second bag opening component 3 to swing. The driving component, the transmission component and the connection relationship between each other can adopt conventional technical means in this field, for example: the driving component may include a motor and a reducer, and the transmission component may include a crank and a connecting rod. The mounting arm 4 of the second bag opening component 3 is hinged on the second mounting frame 6, and the motor is also fixed on the second mounting frame 6. The motor is connected to the reducer, and the reducer is connected to the crank to drive the crank to rotate. The connecting rod is movably connected between the crank and the mounting arm 4, and the crank drives the mounting arm 4 to swing through the connecting rod.

[0040] The first driving assembly is connected to the second driving assembly, and the first driving assembly and the second bag opening assembly 3 run together in a straight line under the drive of the second driving assembly, so that the first bag opening assembly 2 and the second bag opening assembly 3 are close to each other or away from each other. Specifically, the second driving assembly includes a driving motor 13, a rack 14, and a gear 15 meshed with the rack 14. The driving motor 13 is mounted on the first mounting frame 1, the gear 15 is mounted on the output shaft of the driving motor 13, and the rack 14 is connected to the first driving assembly. Specifically, the rack 14 can be connected to the mounting frame in the first driving assembly.

[0041] Example 4

[0042] As the best embodiment of the utility model, the utility model includes a bag opening device for a bagging machine, including a first mounting frame 1, a first bag opening assembly 2, a second bag opening assembly 3, a first drive assembly and a second drive assembly. The first bag opening assembly 2 and the second bag opening assembly 3 each include a mounting arm 4 and two vacuum suction cups 5. The vacuum suction cup 5 is arranged on the mounting arm 4, and each vacuum suction cup 5 is connected to a vacuum generator through a soft air pipe so that the vacuum suction cup 5 can generate negative pressure suction, and the vacuum generator can be made of existing technology. The first bag opening assembly 2 and the second drive assembly are both assembled on the first mounting frame 1. Specifically, the first bag opening assembly 2 can be fixedly arranged on the first mounting frame 1 by a support arm 17.

[0043] The second bag opening component 3 is connected to the first driving component and swings under the drive of the first driving component. Specifically, the first driving component includes a second mounting frame 6, a driving component and a transmission component, and the transmission component is respectively connected to the second bag opening component 3 and the driving component. The driving component includes a driving cylinder 7 mounted on the second mounting frame 6, and the transmission component includes a sliding block 8, a first connecting rod 9, a second connecting rod 10 and a connecting arm 11. The sliding block 8 is connected to the driving cylinder 7, and the mounting arm 4 of the second bag opening component 3 is axially connected to the sliding block 8 through a connecting shaft. One end of the connecting arm 11 is fixedly connected to the second mounting frame 6, and the other end is hinged to the first connecting rod 9. The other end of the first connecting rod 9 is hinged to the second connecting rod 10, and the second connecting rod 10 is fixedly connected to the mounting arm 4 of the second bag opening component 3.

[0044] In order to improve the stability of the movement of the sliding block 8, the second mounting frame 6 may also be provided with a first slide rail 12, and the sliding block 8 is slidably connected to the first slide rail 12. Further, in order to limit the position of the vacuum suction cup 5 in the second bag opening component 3 in the initial state, a limiter may be provided on the second mounting frame 6 to limit the maximum moving distance of the sliding block 8. When the driving cylinder 7 drives the sliding block 8 to move to the maximum distance, the adsorption surface of the vacuum suction cup 5 on the second bag opening component 3 matches the outer surface of the packaging bag.

[0045] The first driving assembly is connected to the second driving assembly, and the first driving assembly and the second bag opening assembly 3 are driven by the second driving assembly to run together in a straight line, so that the first bag opening assembly 2 and the second bag opening assembly 3 are close to each other or away from each other. Specifically, the second driving assembly includes a driving motor 13, a rack 14, and a gear 15 meshed with the rack 14. The driving motor 13 is mounted on the first mounting frame 1, the gear 15 is mounted on the output shaft of the driving motor 13, and the rack 14 is connected to the second mounting frame 6 in the first driving assembly.

[0046] In this embodiment, the first bag opening assembly 2 and the second bag opening assembly 3 are arranged one above the other. The rack 14 can be arranged in a vertical direction. In order to improve the stability of the up and down movement, a vertically arranged second slide rail 16 is also provided on the first mounting frame 1, and one side of the rack 14 is connected to the second mounting frame 6 of the first driving assembly, and the other side is slidably connected to the second slide rail 16.

[0047] The bag opening device returns to the original state. After the bag storage device of the bagging machine takes the bag to the bagging station, the bag opening device starts to work. Figure 1 ~Instructions attached Figure 2 The drive motor 13 drives the rack 14 to move up and down, pressing the packaging bag. At this time, the vacuum suction cup 5 sucks the packaging bag under negative pressure. At the same time, refer to the instructions attached Figure 3 ~Instructions attached Figure 4 , drive the cylinder 7 to move forward and backward, pull the first connecting rod 9 and the second connecting rod 10, drive the second bag opening assembly 3 to swing, open the packaging bag to the bag opening state, make the packaging bag and the bagging machine's opening claw device cooperate with the bagging, after completing the action, the bag opening device returns to the original state position. Repeat the above process to complete the continuous packaging work.

[0048] In this embodiment, the first bag opening component 2 is stationary and the second bag opening component 3 is swinging, so that the packaging bag is opened to the bag opening state, so that the bag opening device is particularly suitable for opening special-shaped packaging bags, including packaging bags with triangular cross-sections for packaging triangular cakes or sandwiches and other materials.

[0049] To sum up, after reading the utility model document, ordinary technicians in this field can make various other corresponding transformation schemes based on the technical scheme and technical concept of the utility model without creative mental labor, which all fall within the scope of protection of the utility model.

Claims

1. A bag opening device for a bagging machine, comprising a first mounting frame (1), a first bag opening assembly (2) and a second bag opening assembly (3), wherein the first bag opening assembly (2) and the second bag opening assembly (3) each comprise a mounting arm (4) and at least one vacuum suction cup (5); characterized in that: The invention also comprises a first drive assembly and a second drive assembly; the first bag opening assembly (2) and the second drive assembly are both mounted on a first mounting frame (1); the second bag opening assembly (3) is connected to the first drive assembly and swings under the drive of the first drive assembly; the first drive assembly is connected to the second drive assembly, and the first drive assembly and the second bag opening assembly (3) run together along a straight line under the drive of the second drive assembly, so that the first bag opening assembly (2) and the second bag opening assembly (3) move closer to or farther from each other.

2. The bag opening device for a bagging machine according to claim 1, characterized in that: The first driving component comprises a driving part and a transmission part, and the transmission part is respectively connected to the second bag opening component (3) and the driving component to drive the second bag opening component (3) to swing.

3. The bag opening device for a bagging machine according to claim 2, characterized in that: The first drive assembly further comprises a second mounting frame (6), and the drive component and the transmission component are both mounted on the second mounting frame (6).

4. The bag opening device for a bagging machine according to claim 3, characterized in that: The driving component comprises a driving cylinder (7) mounted on a second mounting frame (6), and the transmission component comprises a sliding block (8), a first connecting rod (9), a second connecting rod (10) and a connecting arm (11); the sliding block (8) is connected to the driving cylinder (7), and the mounting arm (4) of the second bag opening component (3) is axially connected to the sliding block (8) via a connecting shaft; one end of the connecting arm (11) is fixedly connected to the second mounting frame (6), and the other end is hinged to the first connecting rod (9); the other end of the first connecting rod (9) is hinged to the second connecting rod (10), and the second connecting rod (10) is fixedly connected to the mounting arm (4) of the second bag opening component (3).

5. The bag opening device for a bagging machine according to claim 4, characterized in that: The second mounting frame (6) is provided with a first slide rail (12), and the sliding block (8) is slidably connected to the first slide rail (12).

6. The bag opening device for a bagging machine according to claim 5, characterized in that: The second mounting frame (6) is also provided with a limiting member for limiting the maximum moving distance of the sliding block (8).

7. A bag opening device for a bagging machine according to any one of claims 1 to 6, characterized in that: The second drive assembly comprises a drive motor (13), a rack (14), and a gear (15) meshing with the rack (14); the drive motor (13) is mounted on a first mounting frame (1), the gear (15) is mounted on an output shaft of the drive motor (13), and the rack (14) is connected to the first drive assembly.

8. The bag opening device for a bagging machine according to claim 7, characterized in that: A second slide rail (16) is also provided on the first mounting frame (1); one side of the rack (14) is connected to the first drive assembly, and the other side is slidably connected to the second slide rail (16).

9. A bag opening device for a bagging machine according to claim 8, characterized in that: The bag opening device is used to open a packaging bag with a triangular cross section.

10. The bag opening device for a bagging machine according to claim 9, characterized in that: The first bag opening assembly (2) is fixedly arranged on the first mounting frame (1) via a support arm (17).

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