A carousel-type packaging machine

Abstract

The utility model relates to a turntable type packaging machine capable of realizing stable opening of bag mouth. The turntable type packaging machine comprises a rack, a turntable and a plurality of bag clamping units, the plurality of bag clamping units are installed on the turntable along the circumference and are equally divided, the turntable is installed on a main shaft, and the turntable type packaging machine is characterized in that: the turntable type packaging machine further comprises a bag supporting mechanism, the bag supporting mechanism comprises two upper and lower bag supporting plates, a bag supporting seat, a connecting seat, a bag supporting power source, a telescopic power source and a rotary power source, the two upper and lower bag supporting plates are rotatably installed on the bag supporting seat, the bag supporting power source can drive the two upper and lower bag supporting plates to rotate relative to each other, the bag supporting seat is movably installed on the connecting seat, the telescopic power source can drive the bag supporting seat to move forward and backward, a rotary seat is rotatably installed on the main shaft, the connecting seat is connected to the rotary seat, and the rotary power source can drive the rotary seat to rotate around the main shaft. The turntable type packaging machine is provided with the bag supporting mechanism, can keep the bag mouth stable after being opened by suction, and ensures stable feeding work in the subsequent sequence.

Description

Technical Field

[0001] This utility model relates to a packaging machine, specifically a bag-feeding packaging machine (also known as a rotary packaging machine). Background Technology

[0002] A pre-filled bag packaging machine is a machine that packages items using flat bags or M-shaped bags. It includes a clamping device, a bag-loading device, and a feeding device. The bag-loading device feeds the bag onto the clamping device, which clamps the bag and opens its opening, allowing the feeding device to add material into the bag. In existing clamping devices, the bag stands upright with its opening facing upwards, and material is added from above. However, some packaging is not suitable for top-loading, such as when multiple small packages need to be added to a single bag. Top-loading can cause these small packages to scatter due to collisions, resulting in some falling out. The best method is to push the material horizontally into the bag. To achieve this, the applicant applied for a utility model patent entitled "A Flip-Up Packaging Machine Clamping Device" (Publication No. CN221341366U). This device, through improvements to the clamping structure, enables the bag to flip from a vertical to a horizontal position, allowing material to be smoothly and horizontally loaded into the bag. However, after flipping the bag to a horizontal position, how to stably and reliably open the bag opening and keep it open remains a technical challenge that has not yet been properly resolved. Currently, the most common method for opening the bag opening relies on a pneumatic suction device. This involves two suction nozzles positioned at the top and bottom of the bag opening, which respectively suction the bag walls on both sides of the opening and move towards each other to form an opening. While this method can achieve initial separation of the bag opening under certain conditions, it has significant drawbacks in practical applications: for packaging bags with smooth, soft surfaces or slight wrinkles, the suction force of the nozzles is often insufficient, easily leading to slippage or localized air leakage after suction, preventing the bag opening from opening fully; after the bag opening is suctioned open, due to the bag's own elasticity or residual stress, the bag walls easily spring back and close, requiring the nozzles to continuously apply suction force to maintain the opening, which not only increases energy consumption but also limits the work rhythm; furthermore, the pneumatic suction device needs to move with the bag to the feeding station, and during this movement, the bag opening can easily detach from the nozzles, causing the bag opening to close. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, this utility model innovatively provides a rotary packaging machine that can achieve stable opening of the bag mouth.

[0004] This rotary packaging machine includes a frame, a turntable, and several bag clamping units. These bag clamping units are evenly distributed around the turntable, which is mounted on a main shaft. The machine is characterized by further including a bag-supporting mechanism. This mechanism comprises upper and lower bag-supporting plates, a bag-supporting seat, a connecting seat, a bag-supporting power source, a telescopic power source, and a rotational power source. Both upper and lower bag-supporting plates are rotatably mounted on the bag-supporting seat, and there is a horizontal feeding space between them. The bag-supporting power source drives the upper and lower bag-supporting plates to rotate relative to each other. The bag-supporting seat is movably mounted on the connecting seat, and the telescopic power source drives the bag-supporting seat to move back and forth. A rotating seat is rotatably mounted on the main shaft, and the connecting seat is connected to the rotating seat. The rotational power source drives the rotating seat to rotate around the main shaft.

[0005] The bag support plate is connected to one end of the crossbar, and the other end of the crossbar is connected to the swing seat. The swing seat is hinged to the bag support seat, and the bag support power source drives the upper and lower swing seats to rotate relative to each other.

[0006] The power source for the bag-supporting mechanism is a bag-supporting cylinder, which is hinged to a swing seat, and the piston rod of the bag-supporting cylinder is hinged to another swing seat.

[0007] The connecting seat is provided with a horizontal guide rail, and the bag support seat is slidably mounted on the horizontal guide rail by a slider.

[0008] The telescopic power source is a telescopic cylinder, which is connected to the connecting seat, and the piston rod of the telescopic cylinder is connected to the support bag seat.

[0009] A rotatable drive shaft is mounted on the frame, and the rotational power source can drive the drive shaft to rotate. The drive shaft is connected to the rotating base through a transmission structure.

[0010] The transmission structure includes a transmission cam, a transmission arm, a pull rod, a lower connecting arm, a transmission rod, an upper connecting arm, and an upper pull rod. The transmission cam is connected to a transmission shaft and has a cam groove. One end of the transmission arm is rotatably mounted, and a guide wheel is connected to the middle of the transmission arm. The guide wheel is located in the cam groove of the transmission cam. The other end of the transmission arm is hinged to the pull rod. The pull rod is hinged to one end of the lower connecting arm. The other end of the lower connecting arm is connected to the lower end of the transmission rod. The transmission rod is rotatably mounted in a rod holder, which is mounted on a frame. The upper end of the transmission rod is connected to the upper connecting arm. The upper connecting arm is hinged to one end of the upper pull rod, and the other end of the upper pull rod is hinged to a rotating seat.

[0011] According to the present invention, a rotary packaging machine is provided, which, by setting a bag-supporting mechanism, can keep the bag mouth in a stable open state after it is sucked open, thereby ensuring the stable progress of subsequent feeding work. Attached Figure Description

[0012] Figure 1 The three-dimensional representation of this utility model Figure 1 ; Figure 2 The three-dimensional representation of this utility model Figure 2 ; Figure 3 This is a partial schematic diagram of the present invention. Detailed Implementation

[0013] like Figure 1 As shown, this rotary packaging machine includes a frame, a turntable, and several bag clamping units 1. The bag clamping units 1 are evenly distributed around the circumference of the turntable, which is mounted on a main shaft. Each bag clamping unit 1 is used to clamp a bag A. As the main shaft drives the turntable 1 to rotate, the bag clamping unit 1 carries the bag A to various workstations to complete the corresponding work. See patent publication number CN221341366U.

[0014] To ensure the bag opening is stably opened, such as Figure 1 As shown, the rotary packaging machine also includes a bag-supporting mechanism 2; as Figure 3 As shown, the bag-supporting mechanism 2 includes upper and lower bag-supporting plates 20, a bag-supporting seat 24, a connecting seat 28, a bag-supporting power source 23, a telescopic power source 27, and a rotational power source. Both the upper and lower bag-supporting plates 20 can be rotatably mounted on the bag-supporting seat 24, as shown... Figure 2 As shown, there is a horizontal feeding space 200 between the upper and lower support plates 20. The support power source 23 can drive the upper and lower support plates 20 to rotate relative to each other (relative rotation means that the two support plates 20 can move closer to each other or move away from each other). The support seat 24 is movably mounted on the connecting seat 28. The telescopic power source 27 can drive the support seat 24 to move back and forth. A rotating seat 29 is rotatably mounted on the main shaft. The connecting seat 28 is connected to the rotating seat 29. The rotation power source can drive the rotating seat 29 to rotate around the main shaft. That is, the rotation axis of the rotating seat 29 is coaxial with the rotation axis of the turntable.

[0015] The bag-holding mechanism 2 operates on the following principle: When the upper and lower suction nozzles of the pneumatic suction device open the bag opening of bag A, the telescopic power source 27 drives the bag-holding seat 24 to move inward (at this time, the upper and lower bag-holding plates 20 are in a closed state), allowing the upper and lower bag-holding plates 20 to enter bag A. Then, the bag-holding power source 23 drives the upper and lower bag-holding plates 20 to move away from each other, thus opening the bag opening. Since the bag opening is supported by the bag-holding plates 20, the bag opening will not close under any circumstances. As the turntable rotates, the bag clamp... Unit 1 rotates together with the bag, and the bag-supporting mechanism 2 also moves along with it (driven by a rotary power source, the pneumatic adsorption device does not move). When bag A arrives at the feeding station, the material can be pushed into the bag through the space 200 between the upper and lower bag-supporting plates 20. Then, the telescopic power source 27 drives the bag-supporting seat 24 to move outward, allowing the two bag-supporting plates 20 to come out of the bag. Then, the bag-supporting power source 23 drives the upper and lower bag-supporting plates 20 to come together. After that, the rotary power source drives the bag-supporting mechanism 2 to rotate and reset, continuing to support the next bag.

[0016] To create a horizontal feeding space 200 between the upper and lower support plates 20, such as Figure 3 As shown, the bag support plate 20 is connected to one end of the crossbar 21, while the other end of the crossbar 21 is connected to the swing seat 22. The swing seat 22 is hinged to the bag support base 24, and the bag support power source 23 drives the upper and lower swing seats 22 to rotate relative to each other. Since the bag support plate 20 is connected to one end of the crossbar 21, the outer side of the bag support plate 20 is not blocked by the bag support base 24, and the material can enter the bag A through this space 200. This structure also facilitates the replacement of the bag support plate 20. Simply detach the crossbar 21 from the bag support plate 20 and replace it with a bag support plate 20 of different sizes to accommodate bags of different sizes.

[0017] The bag-supporting power source 23 can be an existing power source drive mechanism such as a cam transmission mechanism, a hydraulic cylinder, or an electric motor. Alternatively, a bag-supporting cylinder can be used. When a bag-supporting cylinder is used, it is hinged to one swing seat 22, and the piston rod of the bag-supporting cylinder is hinged to another swing seat 22. When the bag-supporting cylinder is driven, the two swing seats 22 rotate relative to each other, thus causing the two bag-supporting plates 20 to rotate relative to each other.

[0018] To ensure the smooth movement of the support bag 24, such as... Figure 3 As shown, the connecting seat 28 is provided with a horizontal guide rail 25, and the support bag seat 24 is slidably mounted on the horizontal guide rail 25 via a slider 26.

[0019] like Figure 3As shown, the telescopic power source 27 can be an existing power source drive mechanism such as a cam transmission mechanism, a hydraulic cylinder, or a motor. Alternatively, a telescopic cylinder can be used. When a telescopic cylinder is used, it is connected to the connecting seat 28, and the piston rod of the telescopic cylinder is connected to the bag support seat 24. Driven by the telescopic cylinder, the bag support seat 24 can move back and forth (i.e., horizontally) on the connecting seat 28.

[0020] The rotational power source can be an independent power source (including existing power source drive mechanisms such as motors, which are also within the scope of this application), independently driving the rotating seat 29 to rotate around the main shaft. However, this would be more expensive and have poorer synchronization. To solve this problem, this utility model provides a transmission structure 3: such as... Figure 1 As shown, a rotatable drive shaft 4 is mounted on the frame (this drive shaft 4 can simultaneously drive the actions of other mechanisms; since it is driven by a single drive shaft 4, synchronization can be guaranteed, and costs can be reduced). A rotary power source drives the drive shaft 4 to rotate (the rotary power source is not shown). A drive cam 31 is connected to the drive shaft 4, and the drive cam 31 has a cam groove. A drive arm 30 with one rotatable end is mounted on the frame. A guide wheel is connected to the middle of the drive arm 30, and the guide wheel is located in the cam groove of the drive cam 31. The other end of the drive arm 30 is hinged to a pull rod 32. The pull rod 32 is hinged to one end of a lower connecting arm 33. The other end of the lower connecting arm 33 is connected to the lower end of a drive rod 34. The drive rod 34 is rotatably mounted in a rod seat 35. The rod seat 35 is mounted on the frame. The upper end of the drive rod 34 is connected to an upper connecting arm 36. The upper connecting arm 36 is hinged to one end of an upper pull rod 37. The other end of the upper pull rod 37 is hinged to a rotating seat 29. During operation, the rotary power source drives the transmission shaft 4 to rotate, which in turn drives the transmission cam 31 to rotate. The cam groove of the transmission cam 31 allows the transmission arm 30 to swing (the guide wheel on the transmission arm 30 moves within the cam groove). The transmission arm 30 drives the transmission rod 34 to rotate via the pull rod 32, and the transmission rod 34 then drives the upper pull rod 37 to pull via the upper connecting arm 36. Finally, the upper pull rod 37 pulls the rotating seat 29 to rotate back and forth, thus enabling the bag-supporting mechanism 2 to rotate back and forth within a certain arc. Of course, the transmission shaft 4 can also drive the rotating seat 29 to rotate back and forth via other existing transmission mechanisms, all of which fall within the protection scope of this utility model.

Claims

1. A rotary packaging machine, comprising a frame, a rotary table, and a plurality of bag clamping units (1), wherein the plurality of bag clamping units (1) are equally distributed along the circumference on the rotary table, and the rotary table is mounted on a main shaft, characterized in that: It also includes a bag-supporting mechanism (2), which includes two upper and lower bag-supporting plates (20), a bag-supporting seat (24), a connecting seat (28), a bag-supporting power source (23), a telescopic power source (27), and a rotational power source. The upper and lower bag-supporting plates (20) can be rotatably mounted on the bag-supporting seat (24), and there is a horizontal feeding space (200) between the upper and lower bag-supporting plates (20). The bag-supporting power source (23) can drive the upper and lower bag-supporting plates (20) to rotate relative to each other. The bag-supporting seat (24) can be moved back and forth on the connecting seat (28). The telescopic power source (27) can drive the bag-supporting seat (24) to move back and forth. A rotating seat (29) is rotatably mounted on the main shaft. The connecting seat (28) is connected to the rotating seat (29). The rotational power source can drive the rotating seat (29) to rotate around the main shaft.

2. The rotary packaging machine according to claim 1, characterized in that: The bag support plate (20) is connected to one end of the crossbar (21), and the other end of the crossbar (21) is connected to the swing seat (22). The swing seat (22) is hinged to the bag support seat (24). The bag support power source (23) drives the upper and lower swing seats (22) to rotate relative to each other.

3. A rotary packaging machine according to claim 2, characterized in that: The bag-supporting power source (23) is a bag-supporting cylinder, which is hinged to a swing seat (22), and the piston rod of the bag-supporting cylinder is hinged to another swing seat (22).

4. A rotary packaging machine according to claim 1, characterized in that: The connecting seat (28) is provided with a horizontal guide rail (25), and the support bag seat (24) is slidably mounted on the horizontal guide rail (25) via a slider (26).

5. A rotary packaging machine according to claim 4, characterized in that: The telescopic power source (27) is a telescopic cylinder, which is connected to the connecting seat (28), and the piston rod of the telescopic cylinder is connected to the support bag seat (24).

6. A rotary packaging machine according to claim 1, characterized in that: The frame is equipped with a rotatable drive shaft (4), and the rotational power source can drive the drive shaft (4) to rotate. The drive shaft (4) is connected to the rotating seat (29) through the transmission mechanism (3).

7. A rotary packaging machine according to claim 6, characterized in that: The transmission mechanism (3) includes a transmission cam (31), a transmission arm (30), a pull rod (32), a lower connecting arm (33), a transmission rod (34), an upper connecting arm (36), and an upper pull rod (37); the transmission cam (31) is connected to the transmission shaft (4), the transmission cam (31) has a cam groove, one end of the transmission arm (30) is rotatably mounted, a guide wheel is connected to the middle of the transmission arm (30), the guide wheel is located in the cam groove of the transmission cam (31), and the transmission arm (30) The other end is hinged to the pull rod (32), the pull rod (32) is hinged to one end of the lower connecting arm (33), the other end of the lower connecting arm (33) is connected to the lower end of the transmission rod (34), the transmission rod (34) is rotatably mounted in the rod seat (35), the rod seat (35) is mounted on the frame, the upper end of the transmission rod (34) is connected to the upper connecting arm (36), the upper connecting arm (36) is hinged to one end of the upper pull rod (37), and the other end of the upper pull rod (37) is hinged to the rotating seat (29).

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