Opening tearing device for packaging machine

Abstract

The utility model discloses a tearing device for a packaging machine, and belongs to the technical field of packaging machines. A driving mechanism is mounted between the outer wall of the rack and a roll shaft of the conveying belt; a tearing mechanism is mounted at the top of the rack; an opening and closing mechanism is mounted on the outer wall of the rack and is connected with the driving mechanism and the tearing mechanism; a chute is mounted on the end surface of the rack; continuous packaging materials subjected to heat sealing are placed on the conveying belt, the conveying belt is driven by the driving mechanism to rotate intermittently, so that heat sealing openings are moved to the bottom of the opening tearing mechanism one by one and stopped, the driving mechanism triggers the opening and closing mechanism in a linkage mode, the opening tearing mechanism is lifted up when the conveying belt moves, and movement switching of the packaging materials is facilitated; after the conveying belt stops, the opening and closing mechanism enables the opening tearing mechanism to move downwards to cut off and form an easy-to-tear opening, automatic opening tearing is achieved through mechanical transmission control, control is easy and convenient, and the cost and the failure rate are low.

Description

Technical Field

[0001] This application relates to the technical field of packaging machines, and more specifically, to a tearing device for a packaging machine. Background Art

[0002] For prefabricated sauces, such as sauces and seasoning packets in foods like instant noodles, packaging machines are usually used to wrap the seasoning packets and seal the packaging bags through hot pressing. After preliminary packaging, the seasoning packets are continuously connected, and a tearing device is needed to cut the heat-sealed connection position so that the seasoning packets are independent, and the cut forms a serrated easy-to-tear opening.

[0003] Current tearing devices all sense the heat-sealed position through sensors and then drive a cutter to cut through a cylinder or other means to form an easy-to-tear opening. This requires many sensors, corresponding central control PLCs, and programs, with complex control and high costs, and precision instruments such as sensors are prone to failure.

[0004] In view of this, we propose a tearing device for a packaging machine. Utility Model Content

[0005] The purpose of this application is to provide a tearing device for a packaging machine, which solves the technical problems in the above background art and achieves the technical effect of a tearing device for a packaging machine.

[0006] The technical solution of this application provides a tearing device for a packaging machine, including a frame. A conveyor belt is installed between the frames. A driving mechanism is installed between the outer wall of the frame and the roller shaft of the conveyor belt. A tearing mechanism is installed on the top of the frame. An opening and closing mechanism is installed on the outer wall of the frame. The opening and closing mechanism is connected to the driving mechanism and the tearing mechanism. A chute is installed on the end face of the frame, and the top of the chute is movably attached to the outer wall of the conveyor belt.

[0007] Optionally, the driving mechanism includes a fixed seat. The fixed seat is fixedly installed on the outer wall of the frame. A motor is fixedly installed on the fixed seat. The output shaft of the motor is fixedly sleeved with a driving wheel. One end face of a roller shaft of the conveyor belt penetrates through the frame and is fixedly sleeved with a driven wheel. A plurality of stop grooves are formed on the circumferential outer wall of the driven wheel. A push groove is formed on the driven wheel between adjacent two stop grooves. A rotating groove is formed on the circumferential outer wall of the driving wheel. One end of a connecting rod is fixedly connected to the end face of the driving wheel at the rotating groove. The other end of the connecting rod is fixedly installed with a push rod. The push rod is movably clamped in the push groove. The stop groove is an arc-shaped structure adapted to the circumferential outer wall of the driving wheel. The diameter of the push rod is equal to the inner cavity width of the push groove.

[0008] Optionally, the tearing mechanism includes a guiding seat. Guiding seats are fixedly installed on both sides of the top of the frame. A sliding plate is slidably clamped between the guiding seats. A cutting knife is fixedly installed at the bottom of the sliding plate. Permanent magnets are fixedly installed at the top and bottom of both ends of the sliding plate. First electromagnets and second electromagnets are respectively fixedly installed at the top and bottom of the inner wall of the guiding seat. The cutting knife is of a serrated structure. The energized magnetic properties of the first electromagnet and the second electromagnet are opposite to the magnetic properties of the permanent magnets. The first electromagnet and the second electromagnet are both electrically connected to the opening and closing mechanism.

[0009] Optionally, the opening and closing mechanism includes a fixed cylinder. The fixed cylinder is fixedly installed on the outer wall of the frame at the bottom of the driving wheel. A first fixed contact and a second fixed contact are fixedly installed on the inner wall of the fixed cylinder. A sliding rod slidably penetrates through the top of the fixed cylinder. A pressing plate is fixedly installed at the top of the sliding rod. The pressing plate slidably fits on the outer wall of the frame. A spring is sleeved on the sliding rod between the pressing plate and the fixed cylinder. The bottom of the sliding rod penetrates to the bottom of the first fixed contact and is fixedly installed with a first movable contact. A second movable contact is fixedly sleeved on the sliding rod at the top of the second fixed contact. The first fixed contact and the first movable contact are electrically connected to the second electromagnet and the power supply through a wire. The second fixed contact and the second movable contact are electrically connected to the first electromagnet and the power supply through a wire.

[0010] One or more technical solutions provided in the technical solution of the present application have at least the following technical effects or advantages:

[0011] 1. In the present application, when the motor drives the driving wheel to rotate continuously, when the rotating groove approaches the driven wheel, the push rod slides into the push groove to push the driven wheel to rotate. At this time, the driven wheel can rotate along the rotating groove, and the conveyor belt drives the package to move so that the seal moves to the bottom of the tearing mechanism. When the push rod moves out of the push groove, the rotating groove moves away from the driven wheel. At this time, the circumferential outer wall of the driving wheel is clamped in the stopping groove, so that the driven wheel stops, and the conveyor belt stops, so that the seal position stays at the bottom of the tearing mechanism, achieving the purpose of automatic conveying and positioning.

[0012] 2. In the present application, when the push rod pushes the driven wheel, the elastic force of the spring causes the sliding rod to move upward, and the first movable contact contacts the first fixed contact, so that the second electromagnet is energized. When the push rod disengages from the push groove and the conveyor belt stops, the push rod gradually moves downward and contacts the pressing plate. The pressing plate is gradually pressed down, so that the sliding rod moves downward, causing the first movable contact to disengage from the first fixed contact and the second movable contact to disengage from the second fixed contact. Thus, the first electromagnet is energized and the second electromagnet is de-energized, and the cutting knife quickly moves downward to cut. After the push rod disengages from the pressing plate, the spring pushes the sliding rod upward, causing the first electromagnet to be de-energized and the second electromagnet to be energized, so that the cutting knife moves upward, achieving the purpose of automatic control, pure mechanical linkage control, avoiding problems such as mis-sensing and faults of sensors, and reducing the cost of the central control device and programs. Description of the Drawings

[0013] Figure 1 This is a schematic diagram of the overall structure of a tearing device for a packaging machine disclosed in an embodiment of the present application;

[0014] Figure 2 The embodiment disclosed in this application Figure 1 The enlarged structural diagram at A in the middle;

[0015] Figure 3 The embodiment disclosed in this application Figure 2 The enlarged structural diagram at C in the middle;

[0016] Figure 4 The embodiment disclosed in this application Figure 1 The enlarged structural diagram at B in the middle;

[0017] Explanation of the numbers in the figure: 1. Frame; 2. Conveyor belt; 3. Driving mechanism; 4. Tearing mechanism; 5. Opening and closing mechanism; 6. Chute; 7. Fixed seat; 8. Motor; 9. Driving wheel; 10. Driven wheel; 11. Stop groove; 12. Push groove; 13. Rotating groove; 14. Connecting rod; 15. Push rod; 16. Fixed cylinder; 17. Sliding rod; 18. Pressing plate; 19. Spring; 20. First fixed contact; 21. First movable contact; 22. Second fixed contact; 23. Second movable contact; 24. Guide seat; 25. Slide plate; 26. Cutter; 27. Permanent magnet block; 28. First electromagnet; 29. Second electromagnet. DETAILED DESCRIPTION

[0018] The present application is further described in detail below in conjunction with the accompanying drawings.

[0019] Reference Figure 1 The embodiment of the present application provides a tearing device for a packaging machine, comprising a frame 1, a conveyor belt 2 is installed between the frames 1, a driving mechanism 3 is installed between the outer wall of the frame 1 and the roller of the conveyor belt 2, a tearing mechanism 4 is installed on the top of the frame 1, an opening and closing mechanism 5 is installed on the outer wall of the frame 1, the opening and closing mechanism 5 connects the driving mechanism 3 and the tearing mechanism 4, a chute 6 is installed on the end face of the frame 1, and the top of the chute 6 is movably fitted with the outer wall of the conveyor belt 2, the continuous packages after heat sealing are placed on the conveyor belt 2, and the frontmost heat seal is located at the bottom of the tearing mechanism 4, the conveyor belt 2 is driven by the driving mechanism 3 to rotate intermittently, so that the heat seals are moved to the bottom of the tearing mechanism 4 one by one and stop, and the driving mechanism 3 is linked to trigger the opening and closing mechanism 5, so that the tearing mechanism 4 is lifted up when the conveyor belt 2 moves, which is convenient for the movement and switching of the packages, and after the conveyor belt 2 stops, the opening and closing mechanism 5 causes the tearing mechanism 4 to move down to cut off and form an easy-to-tear opening, and automatic tearing is achieved through mechanical transmission control, which is simple to control and has low cost and failure rate.

[0020] Reference Figure 1 andFigure 2 The driving mechanism 3 includes a fixed seat 7. The outer wall of the frame 1 is fixedly installed with the fixed seat 7. A motor 8 is fixedly installed on the fixed seat 7. The output shaft of the motor 8 is fixedly sleeved with a driving wheel 9. One end face of a roller shaft of the conveyor belt 2 penetrates through the frame 1 and is fixedly sleeved with a driven wheel 10. A plurality of stopping grooves 11 are formed on the circumferential outer wall of the driven wheel 10. A pushing groove 12 is formed on the driven wheel 10 between two adjacent stopping grooves 11. A rotating groove 13 is formed on the circumferential outer wall of the driving wheel 9. One end of a connecting rod 14 is fixedly connected to the end face of the driving wheel 9 at the rotating groove 13. The other end of the connecting rod 14 is fixedly installed with a pushing rod 15. The pushing rod 15 is movably clamped in the pushing groove 12. The stopping groove 11 is an arc-shaped structure adapted to the circumferential outer wall of the driving wheel 9. The diameter of the pushing rod 15 is equal to the inner cavity width of the pushing groove 12. The motor 8 drives the driving wheel 9 to rotate continuously. When the rotating groove 13 approaches the driven wheel 10, the pushing rod 15 slides into the pushing groove 12 to push the driven wheel 10 to rotate. At this time, the driven wheel 10 can rotate along the rotating groove 13. Then the conveyor belt 2 drives the package to move so that the seal moves to the bottom of the tearing mechanism 4. When the pushing rod 15 moves out of the pushing groove 12, the rotating groove 13 moves away from the driven wheel 10. At this time, the circumferential outer wall of the driving wheel 9 is clamped in the stopping groove 11, so that the driven wheel 10 stops, and the conveyor belt 2 stops, so that the seal position stays at the bottom of the tearing mechanism 4, achieving the purpose of automatic conveying and positioning.

[0021] Refer to Figure 1 and Figure 4 The tearing mechanism 4 includes a guiding seat 24. The guiding seats 24 are fixedly installed on both sides of the top of the frame 1. A sliding plate 25 is slidably clamped between the guiding seats 24. A cutting knife 26 is fixedly installed at the bottom of the sliding plate 25. Permanent magnets 27 are fixedly installed at the top and bottom of both ends of the sliding plate 25. First electromagnets 28 and second electromagnets 29 are respectively fixedly installed on the inner wall top and bottom of the guiding seat 24. The cutting knife 26 is of a serrated structure. The electromagnetic properties of the first electromagnets 28 and the second electromagnets 29 are opposite to the magnetic properties of the permanent magnets 27. The first electromagnets 28 and the second electromagnets 29 are both electrically connected to the opening and closing mechanism 5. When the conveyor belt 2 moves, the first electromagnets 28 are powered off and the second electromagnets 29 are powered on. Then the magnetic repulsive force pushes the sliding plate 25 to move upward, and the cutting knife 26 moves away from the conveyor belt 2, facilitating the switching of the package. When the conveyor belt 2 stops, the seal is located at the bottom of the cutting knife 26. At this time, the second electromagnets 29 are powered off and the first electromagnets 28 are powered on. Then the sliding plate 25 quickly moves downward under the repulsive force, so that the cutting knife 26 cuts off the seal, forming a serrated easy-to-tear opening.

[0022] Refer to Figures 1 to 3, the opening and closing mechanism 5 includes a fixed cylinder 16, which is fixedly installed on the outer wall of the frame 1 at the bottom of the driving wheel 9. The inner wall of the fixed cylinder 16 is fixedly installed with a first fixed contact 20 and a second fixed contact 22. A slide rod 17 penetrates through the top of the fixed cylinder 16 in a sliding manner. The top of the slide rod 17 is fixedly installed with a pressing plate 18. The pressing plate 18 is in sliding contact with the outer wall of the frame 1. A spring 19 is sleeved on the slide rod 17 between the pressing plate 18 and the fixed cylinder 16. The bottom of the slide rod 17 penetrates to the bottom of the first fixed contact 20 and is fixedly installed with a first movable contact 21. A second movable contact 23 is fixedly sleeved on the slide rod 17 at the top of the second fixed contact 22. The first fixed contact 20 and the first movable contact 21 are electrically connected to the second electromagnet 29 and the power supply through a wire. The second fixed contact 22 and the second movable contact 23 are electrically connected to the first electromagnet 28 and the power supply through a wire. When the push rod 15 pushes the driven wheel 10, the elastic force of the spring 19 causes the slide rod 17 to move upward, and the first movable contact 21 contacts the first fixed contact 20, so that the second electromagnet 29 is energized. When the push rod 15 disengages from the push groove 12 and the conveyor belt 2 stops, the push rod 15 gradually moves downward and contacts the pressing plate 18. The pressing plate 18 is gradually pressed down, then the slide rod 17 moves downward, so that the first movable contact 21 disengages from the first fixed contact 20, and the second movable contact 23 disengages from the second fixed contact 22, so that the first electromagnet 28 is energized and the second electromagnet 29 is de-energized, and the cutter 26 quickly moves downward to cut. After the push rod 15 disengages from the pressing plate 18, the spring 19 pushes the slide rod 17 upward, so that the first electromagnet 28 is de-energized and the second electromagnet 29 is energized, and the cutter 26 is lifted, achieving the purpose of automatic control.

[0023] Working principle: The motor 8 drives the driving wheel 9 to rotate continuously. When the rotating groove 13 approaches the driven wheel 10, the push rod 15 slides into the push groove 12 to push the driven wheel 10 to rotate. At this time, the driven wheel 10 can rotate along the rotating groove 13, and then the conveyor belt 2 drives the package to move so that the sealing position moves to the bottom of the tearing mechanism 4. When the push rod 15 moves out of the push groove 12, the rotating groove 13 moves away from the driven wheel 10. At this time, the circumferential outer wall of the driving wheel 9 is clamped in the stop groove 11, so that the driven wheel 10 stops, and the conveyor belt 2 stops, so that the sealing position stays at the bottom of the tearing mechanism 4, achieving the purpose of automatic conveying and positioning. When the push rod 15 pushes the driven wheel 10, the elastic force of the spring 19 causes the slide rod 17 to move upward, and the first movable contact 21 contacts the first fixed contact 20, so that the second electromagnet 29 is energized. When the push rod 15 disengages from the push groove 12 and the conveyor belt 2 stops, the push rod 15 gradually moves downward and contacts the pressing plate 18, and the pressing plate 18 is gradually pressed down, then the slide rod 17 moves downward, so that the first movable contact 21 disengages from the first fixed contact 20, and the second movable contact 23 disengages from the second fixed contact 22, so that the first electromagnet 28 is energized and the second electromagnet 29 is de-energized, and the cutter 26 quickly moves downward to cut. After the push rod 15 disengages from the pressing plate 18, the spring 19 pushes the slide rod 17 upward, so that the first electromagnet 28 is de-energized and the second electromagnet 29 is energized, and the cutter 26 moves upward, achieving the purpose of automatic control. It is a pure mechanical linkage control, avoiding mis-sensing and fault problems of sensors, etc., and reducing the cost of the central control device and program.

[0024] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A tearing device for a packaging machine, comprising a frame (1), characterized in that: A conveyor belt (2) is installed between the frames (1). A driving mechanism (3) is installed between the outer wall of the frame (1) and the roller shaft of the conveyor belt (2). A tearing mechanism (4) is installed at the top of the frame (1). An opening and closing mechanism (5) is installed on the outer wall of the frame (1). The opening and closing mechanism (5) is connected to the driving mechanism (3) and the tearing mechanism (4). A chute (6) is installed at the end face of the frame (1), and the top of the chute (6) is movably attached to the outer wall of the conveyor belt (2).

2. The tear opening device for a packaging machine according to claim 1, characterized in that: The driving mechanism (3) includes a fixed seat (7). The fixed seat (7) is fixedly installed on the outer wall of the frame (1). A motor (8) is fixedly installed on the fixed seat (7). The output shaft of the motor (8) is fixedly sleeved with a driving wheel (9). One end face of a roller shaft of the conveyor belt (2) penetrates through the frame (1) and is fixedly sleeved with a driven wheel (10). A plurality of stopping grooves (11) are formed on the circumferential outer wall of the driven wheel (10). A pushing groove (12) is formed on the driven wheel (10) between two adjacent stopping grooves (11). A rotating groove (13) is formed on the circumferential outer wall of the driving wheel (9). One end of a connecting rod (14) is fixedly connected to the end face of the driving wheel (9) at the rotating groove (13). The other end of the connecting rod (14) is fixedly installed with a push rod (15). The push rod (15) is movably clamped in the pushing groove (12).

3. The tearing device for a packaging machine according to claim 2, characterized in that: The stopping groove (11) is an arc-shaped structure adapted to the circumferential outer wall of the driving wheel (9). The diameter of the push rod (15) is equal to the inner cavity width of the pushing groove (12).

4. The tearing device for a packaging machine according to claim 2, characterized in that: The tearing mechanism (4) includes a guiding seat (24). The guiding seats (24) are fixedly installed on both sides of the top of the frame (1). A sliding plate (25) is slidably clamped between the guiding seats (24). A cutting knife (26) is fixedly installed at the bottom of the sliding plate (25). Permanent magnets (27) are fixedly installed at the top and bottom of both ends of the sliding plate (25). The first electromagnet (28) and the second electromagnet (29) are fixedly installed at the top and bottom of the inner wall of the guiding seat (24) respectively.

5. A tearing device for a packaging machine according to claim 4, characterized in that: The cutting knife (26) is of a serrated structure. The energized magnetism of the first electromagnet (28) and the second electromagnet (29) is opposite to the magnetism of the permanent magnet (27). The first electromagnet (28) and the second electromagnet (29) are both electrically connected to the opening and closing mechanism (5).

6. The tearing device for a packaging machine according to claim 5, characterized in that: The opening and closing mechanism (5) includes a fixed cylinder (16), the fixed cylinder (16) is fixedly installed on the outer wall of the frame (1) at the bottom of the driving wheel (9), a first fixed contact (20) and a second fixed contact (22) are fixedly installed on the inner wall of the fixed cylinder (16), a slide rod (17) slidably penetrates through the top of the fixed cylinder (16), a pressing plate (18) is fixedly installed at the top of the slide rod (17), the pressing plate (18) slidably fits the outer wall of the frame (1), a spring (19) is sleeved on the slide rod (17) between the pressing plate (18) and the fixed cylinder (16), the bottom of the slide rod (17) penetrates to the bottom of the first fixed contact (20) and a first movable contact (21) is fixedly installed, a second movable contact (23) is fixedly sleeved on the slide rod (17) at the top of the second fixed contact (22), the first fixed contact (20) and the first movable contact (21) are electrically connected to the second electromagnet (29) and the power supply through a wire, and the second fixed contact (22) and the second movable contact (23) are electrically connected to the first electromagnet (28) and the power supply through a wire.

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