A bag opening device

Abstract

This invention relates to a bag-opening device, comprising a support frame with two sets of support arms symmetrically arranged on the support frame, and a bag-opening section between the support arms; the bag-opening device also includes two sets of bag openers, with the two sets of bag-opening components symmetrically arranged at positions corresponding to the bag-opening sections on the support arms, and each bag opener including a support component and an adsorption component; wherein the support component includes an arc-shaped support frame, the support frame being floatingly connected to the support arm via a first telescopic mechanism; the adsorption component includes two sets of swing arms, the swing arms being symmetrically arranged on both sides of the support frame along its length, a push seat being provided at the middle of the support frame along its length, the push seat being floatingly connected to the telescopic arm via a second telescopic mechanism, a first rotating seat being connected to the push seat, a sliding seat being rotatably connected to the outer side of the support frame along its length, the swing arm being fixedly connected to the first rotating seat, and the other end of the swing arm being slidably connected to the sliding seat; the adsorption component also includes several suction cups, the suction cups being fixed to the swing arms.

Description

Technical Field

[0001] This invention relates to a bag-opening device, belonging to the field of packaging equipment. Background Technology

[0002] Existing bag-opening equipment uses a suction cup and a cylinder-driven reciprocating mechanism for reciprocating movement. The suction cup moves along a straight path, while the unfolded bag has an arc shape. The straight reciprocating suction cup arrangement can easily lead to different traction forces on the bag in different width directions, which can easily cause damage to the bag. If an arc-shaped suction cup arrangement is used, an additional bag unfolding mechanism, such as an unfoldable insert plate, is required to assist in unfolding the bag. The insertion process can easily cause damage to the ends of the bag, and the additional insertion and unfolding steps increase the processing time. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the technical problems of easy damage and time-consuming insertion of the direct reciprocating suction cup in the prior art, and to provide a bag opening device.

[0004] The technical solution adopted by this invention to solve its technical problem is: A bag-opening device includes a support frame with two sets of support arms symmetrically arranged on the support frame, and a bag-opening section between the support arms. The bag-opening device also includes two sets of bag openers, which are symmetrically arranged on the support arms at positions corresponding to the bag-opening section. Each bag opener includes a support component and an adsorption component. The support component includes an arc-shaped support frame, which is floatingly connected to the support arm via a first telescopic mechanism. The adsorption component includes two sets of swing arms, which are elastic in the length direction and are symmetrically arranged on both sides of the support frame in the length direction. A push seat is provided in the middle of the support frame in the length direction, and the push seat is floatingly connected to the telescopic arm via a second telescopic mechanism. A first rotating seat is connected to the push seat, and a sliding seat is rotatably connected to the outer side of the support frame in the length direction. One end of the swing arm is fixedly connected to the first rotating seat, and the other end of the swing arm is slidably connected to the sliding seat. The adsorption component also includes several suction cups, which are fixed to the swing arms.

[0005] As a further improvement of the present invention, the bag opener also includes a synchronization component, which includes a winding device fixed to the end of the support arm. The winding device includes two sets of winding wheels symmetrically arranged relative to the axis of symmetry in the length direction of the support frame. The two sets of winding wheels are fixed to a synchronization shaft. A synchronization rope is provided on the winding wheels, and the end of the synchronization rope is fixedly connected to the middle position of the swing arm. The winding mechanism ensures that the swing angles of the two swing arms are synchronized, preventing the problem of asynchronous bag opening angles caused by slight differences in the elasticity of the two swing arms.

[0006] As a further improvement of the present invention, the winding device includes a rotating frame, a synchronous shaft rotatably connected to the rotating frame, a winding motor is provided inside the rotating frame, and the winding motor is drivenly connected to the synchronous shaft. The winding motor can cause the swing arm to bend slightly by winding the synchronous rope, thereby achieving a slight unfolding of the packaging bag in advance. This prevents the second telescopic mechanism from having too much driving force, which would cause the packaging bag to be damaged due to excessive unfolding force under atmospheric pressure.

[0007] As a further improvement of the present invention, the push seat includes a support plate, on which a first rotating sleeve is vertically fixed, and the middle part of the first rotating sleeve is rotatably connected to the first rotating seat through a bearing; The support plate structure reduces interference when the swing arm swings, while ensuring good rotational support effect.

[0008] As a further improvement of the present invention, a clamping seat is integrally provided inside the first rotating seat, and a clamping groove is provided inside the clamping seat. A fixing bolt is connected to the clamping seat, and the swing arm is clamped and fixed to the clamping groove by the fixing bolt. Compared to integral welding or other fixing methods for the swing arm, the independent clamping and fixing structure can ensure the integrity of the swing arm, reduce stress concentration, and also make it easy to replace the swing arm with different elastic coefficients according to different process requirements.

[0009] As a further improvement of the present invention, the edge of the support piece is integrally provided with a bent support rib perpendicular to the support piece, and a swing opening is provided at the position of the bent support rib corresponding to the first rotating sleeve; a plurality of reinforcing support ribs are arranged in a ring array between the outer wall of the first rotating sleeve and the support piece. The bent support ribs ensure the rigidity of the support plate and reduce the possibility of the support plate bending during the swing arm swing. At the same time, the setting of the reinforcing support ribs reduces the possibility of the first rotating sleeve tearing relative to the support plate and also ensures the structural rigidity of the first rotating sleeve.

[0010] As a further improvement of the present invention, a second rotating sleeve is fixed at the end of the support arm, and a second rotating seat is rotatably connected to the middle of the second rotating sleeve through a bearing. A sliding seat is integrally provided on the rotating seat, and a sliding groove is provided inside the sliding seat. The end of the swing arm is slidably connected to the sliding groove. The second rotating sleeve and the independent second rotating seat ensure the integrity of the support arm, reduce the possibility of stress concentration, and ensure the stability of the second rotating seat during rotation.

[0011] As a further improvement of the present invention, a limiting block is fixed at the end of the swing arm; The limit block prevents the swing arm from coming out of the sliding groove, ensuring the stability of the mechanism's operation.

[0012] As a further improvement of the present invention, a compensating bending part that is concave inward toward the bag opening section is provided in the middle of the swing arm, and the adsorption component is provided on the swing arm at the bending compensation part position. The compensating bend allows the suction cup body to be embedded in the swing arm, thereby reducing the extension of the suction cup. At the same time, it can ensure that the suction cup does not interfere with the outside when the swing arm is retracted, and increase the distance between the ends of the suction cups, thus ensuring the opening diameter of the packaging bag.

[0013] The beneficial effects of this invention are: This invention incorporates an additional flexible swing arm that works in conjunction with the curvature of the packaging bag during unfolding to drive the suction cup's swing mechanism. This allows for direct bag opening and unfolding using an arc-shaped support frame. The swing arm is parallel to the axis of the telescopic mechanism of the support frame, eliminating the need for additional workstations and processes. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 A magnified view of a section at point A in the middle; Figure 3 yes Figure 1 A magnified view of a section at point B in the middle; Figure 4 yes Figure 1 A magnified view of a section at point C.

[0016] In the diagram: 1. Adapter frame; 2. Support arm; 3. Connecting plate; 4. Bag opening section; 5. First telescopic mechanism; 6. Second telescopic mechanism; 7. Winder; 8. Support frame; 9. Limiting plate; 10. Swing arm; 11. Compensating bending part; 12. Suction cup; 13. Support plate; 14. Bending support rib; 15. Synchronous rope; 16. Connecting block; 17. Synchronous shaft; 18. Winding wheel; 19. Winding motor; 20. Reduction gear set; 21. Guide sleeve; 22. First rotating sleeve; 23. First rotating seat; 24. Clamping seat; 25. Second rotating sleeve; 26. Second rotating seat; 27. Sliding seat; 28. Reinforcing support rib; 29. ​​Limiting block. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0018] like Figure 1As shown, the present invention is a bag opening device attached to a canning equipment production line. The bag opening device is connected to the frame via an adapter frame 1, and the entire bag opening device is moved by the reciprocating movement of the frame, so as to facilitate the docking of the unfolded packaging bag with the canning equipment to achieve canning.

[0019] like Figure 1 The bag opening equipment is mainly connected by two sets of support arms 2 fixed on the adapter frame 1. Each set of support arms 2 is equipped with a connecting plate 3, and the bag opener is connected to the connecting plate 3. The bag openers on the two sets of support arms 2 are symmetrically arranged. A bag opening section 4 is set between the two sets of bag openers. The bag opening section 4 corresponds to the filling section. The bag opener completes the filling by unfolding the packaging bag.

[0020] like Figure 1 The bag opener includes an arc-shaped support arm 2, and a first telescopic mechanism 5 with a cylinder structure is fixed on the connecting plate 3. The arc-shaped middle part of the support arm 2 is fixed to the telescopic end of the first telescopic mechanism 5. An adsorption component is provided on the support arm 2. The adsorption component moves synchronously with the movement of the support arm 2, while the first telescopic mechanism 5 can further pull and unfold the packaging bag, so that the packaging bag is in the maximum open state.

[0021] like Figure 1 , Figure 3 and Figure 4The adsorption components are symmetrically arranged on the support arm 2. The adsorption components include two sets of swing arms 10. The swing arms 10 are elastic in the length direction and are symmetrically arranged on both sides of the support frame 8 in the length direction. A push seat is provided in the middle of the support frame 8 in the length direction. A limiting plate 9 for limiting the movement path of the push seat is provided in the middle of the support frame 8. The push seat is floatingly connected to the telescopic arm through the second telescopic mechanism 6 of the cylinder structure. A rotating seat is connected to the push seat. A sliding seat 27 is rotatably connected to the outer side of the support frame 8 in the length direction. One end of the swing arm 10 is fixedly connected to the rotating seat, and the other end of the swing arm 10 is slidably connected to the sliding seat 27. The adsorption components also include several suction cups 12, which are fixed to the swing arms 10. A compensation that is concave inward to the opening section 4 is provided in the middle of the swing arm 10. The bending section 11 has an adsorption component mounted on the swing arm 10 at the bending compensation section. During operation, the first telescopic mechanism 5 and the second telescopic mechanism 6 move toward the center of the bag opening section 4. At the same time, the extension of the second telescopic mechanism 6 is greater than that of the first telescopic mechanism 5, causing the swing arm 10 to swing. During the swing, the end of the swing arm 10 slides outward relative to the sliding seat 27, making the included angle between the two sets of swing arms 10 close to 180°. At this time, the suction cups 12 of the two sets of bag openers are arranged parallel to each other and adapt to the closed packaging bag, so that the suction cups 12 contact the packaging bag. Then, by retracting the second telescopic mechanism 6, the included angle between the two sets of swing arms 10 becomes smaller and arranged in an arc shape. At the same time, the packaging bag is made to unfold in an arc shape by the suction cups 12. After the arc shape unfolds, the bag can be opened by retracting the first telescopic mechanism 5 and the filling action can be performed.

[0022] like Figure 1 and Figure 2The bag opener also includes a synchronization component, which includes a winder 7 fixed to the end of the support arm 2. The winder 7 includes two sets of winding wheels 18 symmetrically arranged along a longitudinal axis relative to the support frame 8. The two sets of winding wheels 18 are fixed to a synchronization shaft 17. A synchronization rope 15 is provided on the winding wheels 18. A connecting block 16 is fixed through the middle of the swing arm 10. The synchronization rope 15 is fixed to the swing arm 10 through the connecting block 16, and the end of the synchronization rope 15 is fixedly connected to the middle position of the swing arm 10. The winder 7 includes a rotating frame, and the synchronization shaft 17 is rotatably connected to the rotating frame. Arc-shaped... The guide sleeve 21 has a winding motor 19 installed inside the rotating frame. The winding motor 19 is connected to the synchronous shaft 17 through a reduction gear set 20. The winding motor 19 can control the bending of the swing arm 10 slightly by winding, so as to realize the partial unfolding of the packaging bag and prevent the second telescopic mechanism 6 with large output torque from directly pulling the packaging bag and causing it to break. At the same time, the synchronous shaft 17 and the winding motor 19 can ensure that the two sets of swing arms 10 are in the same degree of bending and swing angle, so as to ensure the uniform unfolding of the packaging bag and make the overall roundness of the packaging bag high. In addition, the unfolding roundness can also be finely adjusted by the winding motor 19.

[0023] like Figure 2 The push seat includes a support plate 13, on which a first rotating sleeve 22 is vertically fixed. The middle part of the first rotating sleeve 22 is rotatably connected to a first rotating seat 23 via a bearing. A clamping seat 24 is integrally provided inside the first rotating seat 23. A clamping groove is provided inside the clamping seat 24. A fixing bolt is connected to the clamping seat 24. The swing arm 10 is clamped and fixed into the clamping groove by the fixing bolt.

[0024] like Figure 2 The edge of the support plate 13 is integrally provided with a bent support rib 14 perpendicular to the support plate 13, and a swing opening is provided at the position of the bent support rib 14 corresponding to the first rotating sleeve 22; a number of reinforcing support ribs 28 are arranged in a ring array between the outer wall of the first rotating sleeve 22 and the support plate 13.

[0025] like Figure 3 The second rotating sleeve 25 is fixed to the end of the support arm 2. The second rotating sleeve 25 is fixed to the end of the support arm 2 by a reinforcing support rib 28. The middle part of the second rotating sleeve 25 is rotatably connected to the second rotating seat 26 by a bearing. A sliding seat 27 is integrally provided on the rotating seat. A sliding groove is provided in the sliding seat 27. The end of the swing arm 10 is slidably connected to the sliding groove.

[0026] like Figure 3 A limiting block 29 is fixed at the end of the swing arm 10; the limiting block 29 can prevent the swing arm 10 from coming out of the sliding groove, thus ensuring the stability of the mechanism operation.

[0027] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A bag-opening device, comprising a support frame, on which two sets of support arms (2) are symmetrically arranged, and a bag-opening interval (4) is provided between the support arms (2); the bag-opening device further comprises two sets of bag openers, the two sets of bag opener components being symmetrically arranged on the support arms (2) at positions corresponding to the bag-opening interval (4), characterized in that: The bag opener includes a support assembly and an adsorption assembly; The support assembly includes an arc-shaped support frame (8), which is floatingly connected to the support arm (2) via a first telescopic mechanism (5); the adsorption assembly includes two sets of swing arms (10), which are elastic in the length direction and are symmetrically arranged on both sides of the support frame (8) in the length direction. A push seat is provided in the middle of the support frame (8) in the length direction. The push seat is floatingly connected to the telescopic arm via a second telescopic mechanism (6). A first rotating seat (23) is connected to the push seat. A sliding seat (27) is rotatably connected to the outside of the support frame (8) in the length direction. One end of the swing arm (10) is fixedly connected to the first rotating seat (23), and the other end of the swing arm (10) is slidably connected to the sliding seat (27); the adsorption assembly also includes several suction cups (12), which are fixed to the swing arm (10).

2. The bag-opening device as described in claim 1, characterized in that: The bag opener also includes a synchronization component, which includes a winder (7) fixed to the end of the support arm (2). The winder (7) includes two sets of winding wheels (18) arranged symmetrically with respect to the length axis of the support frame (8). The two sets of winding wheels (18) are fixed to a synchronization shaft (17). A synchronization rope (15) is provided on the winding wheel (18). The end of the synchronization rope (15) is fixedly connected to the middle position of the swing arm (10).

3. The bag-opening device as described in claim 1, characterized in that: The winding device (7) includes a rotating frame, a synchronous shaft (17) is rotatably connected to the rotating frame, and a winding motor (19) is provided inside the rotating frame. The winding motor (19) is connected to the synchronous shaft (17) by transmission.

4. The bag-opening device as described in claim 1, characterized in that: The push seat includes a support plate (13), on which a first rotating sleeve (22) is vertically fixed. The middle part of the first rotating sleeve (22) is rotatably connected to the first rotating seat (23) through a bearing.

5. The bag-opening device as described in claim 4, characterized in that: A clamping seat (24) is integrally provided inside the first rotating seat (23). A clamping groove is provided inside the clamping seat (24). A fixing bolt is connected to the clamping seat (24). The swing arm (10) is clamped and fixed to the clamping groove by the fixing bolt.

6. The bag-opening device as described in claim 4, characterized in that: The edge of the support plate (13) is integrally provided with a bent support rib (14) perpendicular to the support plate (13), and a swing opening is provided at the position of the bent support rib (14) corresponding to the first rotating sleeve (22); a number of reinforcing support ribs (28) are arranged in a ring array between the outer wall of the first rotating sleeve (22) and the support plate (13).

7. The bag-opening device as described in claim 1, characterized in that: A second rotating sleeve (25) is fixed at the end of the support arm (2). A second rotating seat (26) is rotatably connected to the middle of the second rotating sleeve (25) via a bearing. A sliding seat (27) is integrally provided on the rotating seat. A sliding groove is provided inside the sliding seat (27). The end of the swing arm (10) is slidably connected to the sliding groove.

8. The bag-opening device as described in claim 7, characterized in that: A limiting block (29) is fixed at the end of the swing arm (10).

9. The bag-opening device as described in claim 1, characterized in that: A compensating bending part (11) that is recessed inward toward the opening section (4) is provided in the middle of the swing arm (10), and the adsorption component is provided on the swing arm (10) at the bending compensation part.

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