Clamping and transferring mechanism of bag feeding type packaging machine

Abstract

The utility model discloses a clamping and transferring mechanism of a bag feeding type packaging machine, which is characterized by comprising a moving frame, the moving frame is connected with a moving driving assembly, a lifting seat is movably arranged on the moving frame, the lifting seat is connected with a lifting driving assembly, a first air cylinder and a second air cylinder are arranged on the lifting seat, and the first air cylinder is connected with the second air cylinder. The output end of the first air cylinder drives a first rotating shaft to rotate through a transmission arm assembly, the first rotating shaft is connected with a first gear and a first clamping plate, the first gear is meshed with a second gear, the second gear is connected with a second rotating shaft, the second rotating shaft is connected with a second clamping plate, and the second rotating shaft is connected with a limiting arm. A piston rod of the second air cylinder can abut against the limiting arm after stretching out, and the air pressure in the second air cylinder is larger than that in the first air cylinder. According to the clamping mechanism, large-angle opening and closing of the clamping mechanism can be achieved, and small-angle limiting of opening and closing of the clamping mechanism can be achieved according to using requirements.

Description

Technical Field

[0001] This utility model relates to packaging machines, specifically to a clamping and conveying mechanism for a bag packaging machine. Background Technology

[0002] A pre-packaging bag machine is a device used to fill packaging bags before vacuuming and heat-sealing. Its working principle is as follows: an empty packaging bag is first clamped by grippers on a turntable. The turntable then moves the bag to the bag opening and filling station. Next, the turntable moves the bag to a clamping and conveying mechanism, which clamps the bag. The grippers on the turntable release the bag, and the conveying mechanism then moves the bag to the vacuuming and heat-sealing mechanism for further vacuuming and heat-sealing. Currently, the opening angle of the grippers in commercially available clamping and conveying mechanisms is fixed. To ensure that the grippers do not interfere with the grippers on the turntable or other structures when holding the bag, the opening angle needs to be set quite large. However, when the bag is transferred to the vacuuming and heat-sealing mechanism and released, for some smaller vacuuming and heat-sealing mechanisms, the grippers of the conveying mechanism may collide with other components when opening, affecting normal operation. Utility Model Content

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by this utility model is to provide a clamping and conveying mechanism for a bag packaging machine to solve the above-mentioned problems.

[0004] Therefore, this utility model is implemented using the following solution:

[0005] A clamping and conveying mechanism for a bag packaging machine is characterized by comprising: a movable frame connected to a movable drive assembly; a lifting seat movably mounted on the movable frame and connected to the lifting drive assembly; a first cylinder and a second cylinder mounted on the lifting seat; the output end of the first cylinder driving a first rotating shaft to rotate via a transmission arm assembly; a first gear and a first clamping plate connected to the first rotating shaft; the first gear meshing with a second gear; the second gear connected to a second rotating shaft; the second rotating shaft connected to a second clamping plate; a limiting arm connected to the second rotating shaft; and the piston rod of the second cylinder extending out and abutting against the limiting arm; and the air pressure in the second cylinder being greater than the air pressure in the first cylinder.

[0006] The mobile drive assembly includes a first motor, the output end of which is connected to a drive screw. The drive screw is screwed to a mobile frame, and a guide assembly is provided corresponding to the mobile frame.

[0007] The lifting drive assembly includes a third cylinder, the cylinder body of which is mounted on the movable frame, and the piston rod of the third cylinder is connected to the lifting seat.

[0008] The transmission arm assembly includes a first transmission arm, one end of which is connected to the piston rod of the first cylinder, the other end of which is hinged to one end of a second transmission arm, the other end of which is hinged to one end of a third transmission arm, and the other end of which is connected to a first rotating shaft.

[0009] The clamping and conveying mechanism of the bag packaging machine described above uses first and second cylinders. The piston rod of the first cylinder extends and retracts normally, and through the transmission arm assembly and gear set, it drives the first and second clamping plates to open and close at a large angle to clamp the packaging bags on the turntable. When the packaging bags are subsequently sent to the vacuum heat sealing mechanism, the piston rod of the second cylinder can be extended to prevent the first and second clamping plates from opening further when the limit arm abuts against the piston rod of the second cylinder. This achieves a small-angle opening and closing of the clamping plates, thereby preventing the clamping plates from colliding with the components in the small-sized vacuum heat sealing mechanism when releasing the packaging bags, ensuring the normal operation of the equipment. Attached Figure Description

[0010] The present invention includes the following figures:

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 for Figure 1 A magnified view of the area pointed to by A in the middle. Detailed Implementation

[0013] As shown in the figure, the present invention discloses a movable frame 5, which is connected to a movable drive assembly. A lifting seat 6 is movably mounted on the movable frame 5 and is connected to the lifting drive assembly. A first cylinder 18 and a second cylinder 7 are mounted on the lifting seat 6. The output end of the first cylinder 18 drives the first rotating shaft 14 to rotate through a transmission arm assembly. A first gear 13 and a first clamping plate 12 are connected to the first rotating shaft 14. The first gear 13 meshes with a second gear 9. The second gear 9 is connected to a second rotating shaft 10 and a second clamping plate 11. A limiting arm 8 is connected to the second rotating shaft 10. After the piston rod of the second cylinder 7 extends, it can abut against the limiting arm 8. The air pressure in the second cylinder 7 is greater than the air pressure in the first cylinder 18.

[0014] Furthermore, the moving drive assembly includes a first motor 1, the output end of which is connected to a drive screw 2. The drive screw 2 is screwed to a moving frame 5. A guide assembly is provided corresponding to the moving frame 5. The guide assembly is a guide post 3 passing through the moving frame 5, or it can be a slide block or slide rail structure. By controlling the first motor 1 to drive the drive screw 2 to rotate, the moving frame 5 can be moved under the guidance of the guide post 3.

[0015] Furthermore, the lifting drive assembly includes a third cylinder 4, the cylinder body of which is mounted on the movable frame 5, and the piston rod of the third cylinder 4 is connected to the lifting seat 6. By controlling the third cylinder 4, the lifting seat 6 can be raised or lowered.

[0016] Furthermore, the transmission arm assembly includes a first transmission arm 17, one end of which is connected to the piston rod of the first cylinder 18, the other end of which is hinged to one end of a second transmission arm 16, the other end of which is hinged to one end of a third transmission arm 15, and the other end of which is connected to a first rotating shaft 14. By controlling the extension and retraction of the piston rod of the first cylinder 18, and through the transmission arm assembly, the first rotating shaft 14 can be driven to rotate clockwise or counterclockwise.

[0017] The working principle of this utility model is as follows: When the clamping and transferring mechanism is in the bag-holding state, the piston rods of the first cylinder 18 and the second cylinder 7 are both in the retracted state. At this time, the first and second clamping plates are in a large-angle open state, waiting for the turntable to drive the bag opening of the already filled packaging bag to be sent between the first and second clamping plates. Then, the piston rod of the first cylinder 18 extends and drives the first rotating shaft 14 to rotate through the transmission arm assembly. Through the gear set transmission, the second rotating shaft 10 is rotated, thereby driving the first clamping plate 12 and the second clamping plate 11 to move closer to each other and clamp the bag opening. Then, the moving drive assembly and the lifting drive assembly move to send the clamped packaging bag into the vacuum heat sealing mechanism. At this time, the piston rod of the second cylinder 7 also... The first cylinder 18 has already extended. Then, the piston rod of the first cylinder 18 retracts inward, causing the first and second clamping plates to loosen the packaging bag. When the limiting arm 8 abuts against the piston rod of the second cylinder 7, the air pressure inside the second cylinder 7 is greater than that inside the first cylinder 18. This restricts the piston rod of the first cylinder 18 from retracting further through the limiting arm, gear set, and transmission arm set. This allows the first and second clamping plates to open only at a small angle, preventing them from opening too wide and colliding with the inside of the vacuum heat sealing assembly. Afterward, the moving drive assembly and the lifting drive assembly move the clamping plates back to the bag-equalizing position. At this time, the piston rod of the second cylinder 7 retracts, and the piston rod of the first cylinder 18 can continue to retract, causing the first and second clamping plates to open at a large angle.

[0018] This structure of the present invention can switch between large and small angle opening and closing of the clamping plate according to the usage requirements, ensuring that the clamping and transfer operation can be carried out smoothly and will not collide with the internal components of the equipment.

Claims

1. A clamping and conveying mechanism for a bag packaging machine, characterized in that: The device includes a movable frame (5), which is connected to a movable drive assembly. A lifting seat (6) is movably mounted on the movable frame (5), which is connected to the lifting drive assembly. A first cylinder (18) and a second cylinder (7) are mounted on the lifting seat (6). The output end of the first cylinder (18) drives the first rotating shaft (14) to rotate through the transmission arm assembly. A first gear (13) and a first clamping plate (12) are connected to the first rotating shaft (14). The first gear (13) meshes with the second gear (9). The second gear (9) is connected to the second rotating shaft (10). The second rotating shaft (10) is connected to the second clamping plate (11). A limit arm (8) is connected to the second rotating shaft (10). After the piston rod of the second cylinder (7) extends, it can abut against the limit arm (8). The air pressure in the second cylinder (7) is greater than the air pressure in the first cylinder (18).

2. The clamping and conveying mechanism of the bag packaging machine according to claim 1, characterized in that: The mobile drive assembly includes a first motor (1), the output end of which is connected to a drive screw (2), the drive screw (2) is screwed to a mobile frame (5), and a guide assembly is provided on the mobile frame (5).

3. The clamping and conveying mechanism of the bag packaging machine according to claim 1, characterized in that: The lifting drive assembly includes a third cylinder (4), the cylinder body of which is mounted on the movable frame (5), and the piston rod of the third cylinder (4) is connected to the lifting seat (6).

4. The clamping and conveying mechanism of the bag packaging machine according to claim 1, characterized in that: The transmission arm assembly includes a first transmission arm (17), one end of which is connected to the piston rod of the first cylinder (18), the other end of which is hinged to one end of the second transmission arm (16), the other end of which is hinged to one end of the third transmission arm (15), and the other end of which is connected to the first rotating shaft (14).

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