Rotating disc type packaging machine

Abstract

The utility model relates to a rotating disc type packaging machine capable of remarkably improving packaging efficiency. The rotating disc type packaging machine comprises a machine frame, a rotating disc and a heat sealing mechanism, the heat sealing mechanism comprises a heat sealing base and two heat sealing heads, the two heat sealing heads are installed on the heat sealing base, a transmission shaft is arranged in the center of the rotating disc in a penetrating mode and is in transmission connection with a power source, and the power source is connected with the rotating disc. The device is characterized in that a heat-sealing seat of the heat-sealing mechanism is in transmission connection with a transmission shaft, and the transmission shaft can rotate to drive the heat-sealing mechanism to swing back and forth. The heat sealing mechanism of the rotating disc type packaging machine rotates along with the rotating disc during heat sealing, the rotating time of the rotating disc is utilized, and therefore the packaging efficiency is remarkably improved.

Description

Technical Field

[0001] This utility model relates to a packaging machine, specifically a rotary packaging machine. Background Technology

[0002] A rotary packaging machine is used to package foods such as pickled vegetables, preserved mustard greens, and kimchi. Its core structure includes a rotary table and bag-clamping units distributed around its circumference (see CN113800049B and CN103241410B). Arranged sequentially around the outer circumference of the rotary table are the bag-loading station, bag-opening station, bag-supporting station, material-feeding station, heat-sealing station, and bag-unloading station. In the traditional workflow, the bag-clamping device carries the packaging bag and rotates intermittently with the rotary table, pausing at each station to complete its corresponding task. The heat-sealing station is equipped with a heat-sealing mechanism, which currently uses a fixed installation. The heat-sealing mechanism only seals the bag on the rotary table after it stops, and only after heat-sealing is complete does the rotary table rotate again to allow the bag to move to the next station. However, this heat-sealing method requires the rotary table to stop and wait for the heat-sealing to finish, resulting in a long waiting time and severely limiting the packaging speed. 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 significantly improve packaging efficiency.

[0004] This rotary packaging machine includes a frame, a turntable, and a heat sealing mechanism. The heat sealing mechanism includes a heat sealing seat and two heat sealing heads, which are mounted on the heat sealing seat. A drive shaft passes through the center of the turntable and is connected to a power source. The machine is characterized in that the heat sealing seat of the heat sealing mechanism is connected to the drive shaft, and the rotation of the drive shaft can drive the heat sealing mechanism to swing back and forth.

[0005] A bag-supporting mechanism is connected to the drive shaft. The bag-supporting mechanism includes a bag-supporting seat and two first and second bag-supporting plates that can open the bag opening. The first and second bag-supporting plates are both mounted on the bag-supporting seat, which is connected to the drive shaft.

[0006] A first bag-supporting arm is hinged to the bag-supporting base. The first bag-supporting arm has a first connecting arm and a first transmission arm forming an angle. The first bag-supporting plate is connected to the first connecting arm. A second bag-supporting arm is hinged to the bag-supporting base. The second bag-supporting arm has a second connecting arm and a second transmission arm forming an angle. The second bag-supporting plate is connected to the second connecting arm. The first transmission arm and the second transmission arm are hinged together.

[0007] A bag-supporting transmission seat is hinged to the bag-supporting base, and a bag-supporting pull rod is hinged to the bag-supporting transmission seat. The first bag-supporting arm has a first actuating arm that forms an angle with the first transmission arm. The bag-supporting pull rod is hinged to the first actuating arm. An actuating block is connected to the frame. A force-receiving wheel is provided on the bag-supporting transmission seat. The rotation of the bag-supporting base can cause the actuating block to act on the force-receiving wheel.

[0008] A crossbeam is mounted on the frame, and the heat sealing seat of the heat sealing mechanism is rotatably mounted on the crossbeam. The rotation axis of the heat sealing seat is coaxial with the drive shaft. A vertically extending lifting guide rail is connected to the drive shaft, and a slide is connected to the heat sealing seat. The slide slides on the lifting guide rail. The power source can drive the drive shaft to move up and down and rotate back and forth around the axis.

[0009] The power source is connected to the drive shaft via a transmission assembly, which includes a lifting cam, a swing cam, a drive shaft connecting seat, a lifting swing arm, and a swing swing arm. The lower end of the drive shaft is connected to the drive shaft connecting seat, which is hinged to one end of the lifting swing arm. The other end of the lifting swing arm is rotatably mounted. A lifting roller is connected to the lifting swing arm, and the lifting roller is located in the lifting cam groove of the lifting cam. The drive shaft is connected to a swing rod, which is connected to one end of a pull rod via a spherical bearing. The other end of the pull rod is hinged to one end of the swing swing arm, and the other end of the swing swing arm is rotatably mounted. A swing roller is connected to the swing swing arm, and the swing roller is located in the swing cam groove of the swing cam. The power source can drive the lifting cam and the swing cam to rotate.

[0010] The heat-sealing seat is provided with parallel upper and lower guide rails. An upper slider is provided on the upper guide rail, and a first heat-sealing head is connected to the upper slider. A lower slider is provided on the lower guide rail, and a second heat-sealing head is connected to the lower slider. A transmission arm that can rotate around the center is hinged to the heat-sealing seat. One end of the transmission arm is hinged to one end of an upper pull rod, and the other end of the upper pull rod is hinged to the upper slider. The other end of the transmission arm is hinged to one end of a lower pull rod, and the other end of the lower pull rod is hinged to the lower slider. A heat-sealing power source is installed on the heat-sealing seat, which can drive the upper and lower sliders to move.

[0011] The heat-sealing seat is equipped with a nitrogen filling mechanism, which includes a nitrogen filling pipe and a nitrogen pipe power source that drives the nitrogen filling pipe to move up and down. The lower end of the nitrogen filling pipe is flat.

[0012] The nitrogen filling mechanism includes a three-way valve, the first port of which is connected to the nitrogen filling pipe, the second port of which is connected to the nitrogen source, and the third port of which is connected to the negative pressure source.

[0013] A bag-opening mechanism is connected to the drive shaft. The bag-opening mechanism includes a bag-opening seat and two suction nozzles, a first suction nozzle and a second suction nozzle, which can suck open the bag opening. The first suction nozzle and the second suction nozzle are both installed on the bag-opening seat, which is connected to the drive shaft.

[0014] According to the rotary packaging machine provided by this utility model, the heat sealing mechanism rotates together with the turntable during heat sealing, making use of the turntable's rotation time, thereby significantly improving packaging efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 Schematic diagram of the heat sealing mechanism Figure 1 ;

[0017] Figure 3 Schematic diagram of the heat sealing mechanism Figure 2 ;

[0018] Figure 4 This is a schematic diagram of the bag-supporting mechanism;

[0019] Figure 5 This is a schematic diagram of the transmission principle of the drive shaft;

[0020] Figure 6 for Figure 5 A magnified view of a section at point A in the middle;

[0021] Figure 7 This is a schematic diagram showing the connection between the three-way valve and the nitrogen charging pipe. Detailed Implementation

[0022] like Figure 1 As shown, this rotary packaging machine includes a frame (not shown), a turntable 1, and a heat-sealing mechanism 6. Multiple bag-clamping units 2 (used to clamp bags, existing technology) are evenly distributed along the circumference of the turntable 1. The heat-sealing mechanism 6 is located above the bag-clamping units 2. Driven by a rotational power source, the turntable 1 rotates, and the bag-clamping units 2 clamp the bags and move them to the bottom of the heat-sealing mechanism 6, where the heat-sealing mechanism 6 begins to heat-seal the bag opening. Figure 2 As shown, the heat-sealing mechanism 6 includes a heat-sealing seat 60 and two heat-sealing heads 61. The two heat-sealing heads 61 are mounted on the heat-sealing seat 60, and the relative movement of the two heat-sealing heads 61 can heat-seal the bag opening; as shown... Figure 1 As shown, a drive shaft 3 is inserted through the center of the turntable 1 (the two are not connected, but the drive shaft 3 can rotate relative to the turntable 1). The drive shaft 3 is connected to the power source, and the heat sealing seat 60 of the heat sealing mechanism 6 is connected to the drive shaft 3. The rotation of the drive shaft 3 can drive the heat sealing mechanism 6 to swing back and forth.

[0023] During operation, turntable 1 rotates intermittently, and the bag clamping unit 2 on turntable 1 sequentially moves to the bag loading station, bag opening station, bag opening station (the bag opening station and the bag opening station can also be the same station), material feeding station, heat sealing station, and bag unloading station. The bag loading is completed at the bag loading station, the bag opening is completed at the bag opening station, the bag opening is completed at the bag opening station (if the bag opening station and the bag opening station are the same station, the bag is opened and then immediately opened), the material feeding is completed at the material feeding station, the bag sealing is completed at the heat sealing station, and the bag unloading is completed at the bag unloading station, thus completing all the packaging work. When the bag clamping unit 2 on turntable 1 arrives at the heat-sealing station, the heat-sealing mechanism 6 begins to heat-seal the bag opening. At this time, turntable 1 does not need to wait for the heat-sealing to complete before rotating; instead, it can rotate immediately. Driven by the transmission shaft 3, the heat-sealing mechanism 6 also rotates together. In other words, the heat-sealing mechanism 6 rotates along with turntable 1, continuously heat-sealing the bag during this rotation time. This utilizes the rotation time of turntable 1 for heat sealing, eliminating the need to specifically allocate time for heat sealing and greatly improving packaging efficiency. After the heat-sealing mechanism 6 completes the heat sealing, the transmission shaft 3 rotates, causing the heat-sealing mechanism 6 to immediately swing back, awaiting the next heat sealing. It is worth mentioning that the power source driving the transmission shaft 3 and the rotational power source driving the turntable 1 can be the same power source. This same power source can drive the transmission shaft 3 and turntable 1 to rotate via a cam or other transmission structure. Of course, it can also be driven by two independent power sources.

[0024] As mentioned above, the bag clamping unit 2 on turntable 1 needs to move to the bag opening station to open the bag, facilitating subsequent material feeding. This bag opening is performed by the bag opening mechanism 4. Since the bag opening mechanism 4 needs to open and hold the bag open before moving it to the material feeding station, it also needs to oscillate back and forth. Figure 1 As shown, a bag-supporting mechanism 4 is connected to the drive shaft 3, such as... Figure 4As shown, the bag-supporting mechanism 4 includes a bag-supporting seat 40 and two first bag-supporting plates 41 and second bag-supporting plates 42 that can open the bag opening. Both the first bag-supporting plates 41 and the second bag-supporting plates 42 are mounted on the bag-supporting seat 40, which is connected to the drive shaft 3. With this structure, the rotation of one drive shaft 3 can simultaneously drive the bag-supporting mechanism 4 and the heat-sealing mechanism 6 to rotate together. The rotation of the bag-supporting mechanism 4 ensures that the bag on one of the bag-clamping units 2 remains open as it moves from the bag-supporting station to the feeding station, while the rotation of the heat-sealing mechanism 6 ensures that the bag on the other bag-clamping unit 2 remains heat-sealed as it moves from the heat-sealing station to the unloading station. Since all the bag clamping units 2 on a turntable 1 rotate with the same amplitude and frequency, the rotation amplitude and frequency of the bag supporting mechanism 4 and the heat sealing mechanism 6 must also be adjusted to be the same. Since one power source and one drive shaft 3 can drive the bag supporting mechanism 4 and the heat sealing mechanism 6 to move synchronously, as long as the rotation amplitude and frequency of the drive shaft 3 are well controlled, it can be ensured that the rotation of the bag supporting mechanism 4 and the heat sealing mechanism 6 matches the rotation of the bag clamping unit 2, which significantly reduces the difficulty of controlling the rotation of the bag supporting mechanism 4 and the heat sealing mechanism 6 and ensures the consistency of the rotation of the bag supporting mechanism 4 and the heat sealing mechanism 6. At the same time, since only one power source and one drive shaft 3 are used, the complexity of the equipment and the manufacturing cost can be greatly reduced.

[0025] In order to drive the first support plate 41 and the second support plate 42 to move relative to each other, such as Figure 4 As shown, a first bag support arm 44 is hinged to the bag support base 40. The first bag support arm 44 has a first connecting arm 441 and a first transmission arm 442 forming an angle. A first bag support plate 41 is connected to the first connecting arm 441. A second bag support arm 43 is hinged to the bag support base 40. The second bag support arm 43 has a second connecting arm 431 and a second transmission arm 432 forming an angle. A second bag support plate 42 is connected to the second connecting arm 431. The first transmission arm 442 and the second transmission arm 432 are hinged together. During operation, driven by power, the first bag-supporting arm 44 or the second bag-supporting arm 43 rotates, allowing the first bag-supporting plate 41 and the second bag-supporting plate 42 to move away from or towards each other. The bag opening is opened at the bag-opening station by the bag-opening mechanism (the bag-opening mechanism is existing technology, including two suction nozzles on the left and right sides of the bag, which suck the bag open from the left and right sides). When the first bag-supporting plate 41 and the second bag-supporting plate 42 move towards each other, they can enter the bag. When the first bag-supporting plate 41 and the second bag-supporting plate 42 move away from each other, they can open the bag opening.

[0026] To drive the rotation of the first bag support arm 44 or the second bag support arm 43, such as Figure 4As shown, a bag-supporting transmission seat 46 is hinged to the bag-supporting seat 40, and a bag-supporting pull rod 45 is hinged to the bag-supporting transmission seat 46. The first bag-supporting arm 44 has a first actuating arm 443 that forms an angle with the first transmission arm 442. The bag-supporting pull rod 45 is hinged to the first actuating arm 443. An actuating block (not shown, the actuating block is fixedly set) is connected to the frame. The bag-supporting transmission seat 46 is provided with a force-receiving wheel 47. The rotation of the bag-supporting seat 40 can cause the actuating block to act on the force-receiving wheel 47. When the drive shaft 3 rotates, causing the bag to move to the opening position, the bag support seat 40 rotates together with the bag support transmission seat 46. This causes the force wheel 47 on the bag support transmission seat 46 to rotate as well. The force wheel 47 acts on the action block (or the action block acts on the force wheel 47), causing the bag support transmission seat 46 to rotate further relative to the bag support seat 40. This causes the bag support transmission seat 46 to pull the bag support rod 45, which in turn pulls the first bag support arm 44. This causes the first bag support plate 41 and the second bag support plate 42 to come closer together, allowing them to enter the bag. When the drive shaft 3 rotates, causing the bag to begin turning to the feeding position, the action block gradually moves away from the force wheel 47, and the force wheel 47 gradually loses its force. Meanwhile, the first bag support plate 41 and the second bag support plate 42 gradually open under their own weight, thus opening the bag opening. It is worth mentioning that a separate power source for the bag-supporting mechanism can be set up to drive the bag-supporting transmission seat 46. By adopting the structure of the action block and the force-receiving wheel 47, the force of the rotation of the transmission shaft 3 can be used to make the bag-supporting mechanism 4 move, thereby saving a power source and reducing manufacturing costs.

[0027] Because the bag-supporting mechanism 4 needs to move up and down so that the first bag-supporting plate 41 and the second bag-supporting plate 42 can be inserted into the bag from above, the power source not only needs to drive the transmission shaft 3 to rotate back and forth around its axis, but also needs to be able to drive the transmission shaft 3 to move up and down. However, the heat-sealing mechanism 6 does not need to move up and down because when the bag rotates, the bag opening can directly enter between the two heat-sealing heads 61 of the heat-sealing mechanism 6, and the transmission shaft 3 synchronously drives the bag-supporting mechanism 4 and the heat-sealing mechanism 6 to rotate. To understand the problem, such as Figure 1 and Figure 2 As shown, a crossbeam 5 (the frame is not shown; the crossbeam 5 is fixedly mounted on the frame) is installed on the frame. The heat sealing seat 60 of the heat sealing mechanism 6 is rotatably mounted on the crossbeam 5 via a rotating shaft 50. The rotation axis of the heat sealing seat 60 is coaxial with the drive shaft 3 (that is, the rotating shaft 50 and the drive shaft 3 are coaxial). Figure 1As shown, a vertically extending lifting guide rail 7 is connected to the drive shaft 3, while a slide 8 is connected to the heat-sealing seat 60. The slide 8 slides on the lifting guide rail 7 (the slide 8 and the lifting guide rail 7 are in a sliding relationship; the slide 8 can also be called the lifting guide rail 7, and the lifting guide rail 7 can also be called the slide 8). With this structure, when the drive shaft 3 moves up and down, driving the bag-supporting mechanism 4 to move up and down, the lifting guide rail 7 moves up and down on the slide 8, without affecting the heat-sealing mechanism 6 in the longitudinal direction. When the drive shaft 3 rotates, it drives the bag-supporting mechanism 4 to rotate, and simultaneously, through the connection between the slide 8 and the lifting guide rail 7, it drives the heat-sealing seat 60 to rotate around the rotating shaft 50, thus enabling the heat-sealing mechanism 6 to rotate. This structure allows a single drive shaft 3 to both drive the heat-sealing mechanism 6 and the bag-supporting mechanism 4 to rotate synchronously, and also to drive the bag-supporting mechanism 4 to move up and down without affecting the heat-sealing mechanism 6.

[0028] It is worth mentioning that an independent power source can also be set to drive the bag support mechanism 4 to move up and down relative to the transmission shaft 3. In this way, the transmission shaft 3 does not need to move up and down, and the slide 8 and lifting guide rail 7 do not need to be set between the heat sealing mechanism 6 and the transmission shaft 3.

[0029] When the drive shaft 3 has the function of moving up and down, in order to enable the drive shaft 3 to rotate back and forth around its axis, it is also necessary to enable the drive shaft 3 to move up and down, such as... Figure 5 and Figure 6As shown, the power source is connected to the drive shaft 3 via a transmission assembly, which includes a lifting cam 31, a swing cam 30, a drive shaft connecting seat 38, a lifting swing arm 33, and a swing arm 32. The lower end of the drive shaft 3 is connected to the drive shaft connecting seat 38, which is hinged to one end of the lifting swing arm 33 via a hinge shaft 37. The other end of the lifting swing arm 33 is rotatably mounted on the frame. A lifting roller 36 is connected to the lifting swing arm 33, which is located in the lifting cam groove 310 of the lifting cam 31. When the lifting cam 31 rotates, it can drive the lifting swing arm 33 to swing via the lifting roller 36, thereby driving the drive shaft 3 to move up and down. In addition, the drive shaft 3 is connected to a swing rod 35, which is connected to one end of a pull rod 34 via a joint bearing 39 (the pull rod 34 is connected to the joint bearing 39). The connecting rod 39 is connected to the spherical bearing 39, which in turn is connected to the connecting rod 390, which is connected to the swing arm 35. The other end of the pull rod 34 is hinged to one end of the swing arm 32, and the other end of the swing arm 32 is rotatably mounted on the frame. A swing roller (not shown) is connected to the swing arm 32, which is located in the swing cam groove 300 of the swing cam 30. When the swing cam 30 rotates, it can drive the swing arm 32 to swing through the swing roller. The swing arm 32 then pulls the swing arm 35 and the drive shaft 3 to rotate together through the pull rod 34. With this structure, the lifting cam 31 and the swing cam 30 can be mounted on the same output shaft. Only one power source is needed to drive the output shaft to rotate, and the lifting cam 31 and the swing cam 30 can rotate synchronously, thereby driving the drive shaft 3 to move up and down and rotate around the axis. Since it is a single power source that drives two cams, the action of the drive shaft 3 is more consistent and the operation is more stable and reliable.

[0030] In order to drive the two heat seal heads 61 to move, such as Figure 2 As shown, the heat-sealing seat 60 is provided with parallel upper guide rail 63 and lower guide rail 64. An upper slider 65 is provided on the upper guide rail 63, and a first heat-sealing head 61 is connected to the upper slider 65. A lower slider 66 is provided on the lower guide rail 64, and a second heat-sealing head 61 is connected to the lower slider 66. Figure 3 As shown, a transmission arm 67, which can rotate around a center, is hinged to the heat-sealing base 60. One end of the transmission arm 67 is hinged to one end of the upper pull rod 68, and the other end of the upper pull rod 68 is hinged to the upper slider 65. The other end of the transmission arm 67 is hinged to one end of the lower pull rod 69, and the other end of the lower pull rod 69 is hinged to the lower slider 66. A heat-sealing power source 62 is installed on the heat-sealing base 60, which can drive the upper slider 65 and the lower slider 66 to move. Driven by the heat-sealing power source 62, the upper slider 65 and the lower slider 66 can move in opposite directions, so that the two heat-sealing heads 61 can move away from each other, waiting for the bag to enter. The two heat-sealing heads 61 can then move closer together to seal the bag opening.

[0031] The bag clamping unit 2 includes two clamps, one on the left and one on the right, which can clamp the two edges of the bag.

[0032] To improve the packaging's preservation effect, a nitrogen filling mechanism 9 is provided on the heat-sealing seat 60, such as... Figure 3 As shown, the nitrogen filling mechanism 9 includes a nitrogen filling pipe 90 and a nitrogen pipe power source 91 that drives the nitrogen filling pipe 90 to move up and down. The lower end of the nitrogen filling pipe 90 is flat. When the bag arrives at the heat sealing station, the nitrogen pipe power source 91 drives the nitrogen filling pipe 90 to descend and insert into the bag. The two heat sealing heads 61 move closer to each other. Because the lower end of the nitrogen filling pipe 90 is flat, the two heat sealing heads 61 clamp the lower end of the nitrogen filling pipe 90, and at the same time, they can clamp the bag opening to prevent nitrogen from leaking out. Then, the nitrogen filling pipe 90 fills the bag with nitrogen. After the bag is full of nitrogen (nitrogen replaces air, effectively reducing the oxygen content of the packaging bag, reducing the oxidation rate of food and the rate of bacterial growth, and ensuring the freshness and safety of food), the nitrogen filling pipe 90 retracts, and the two heat sealing heads 61 of the heat sealing mechanism 6 continue to clamp, completing the heat sealing of the bag opening. Of course, the nitrogen filling and heat sealing work are carried out during the rotation of the turntable 1.

[0033] In order to quickly fill with nitrogen, such as Figure 7 As shown, the nitrogen filling mechanism 9 includes a three-way valve F. The first port F1 of the three-way valve F is connected to the nitrogen filling pipe 90, the second port F2 of the three-way valve F is connected to the nitrogen source, and the third port F3 of the three-way valve F is connected to a negative pressure source (the negative pressure source includes a vacuum pump, vacuum generator, or other equipment that can generate negative pressure). During operation, the air inside the bag can be first removed by the negative pressure source, and then nitrogen can be refilled into the bag by the nitrogen source. This can significantly increase the nitrogen filling speed and increase the nitrogen concentration, thereby improving the preservation effect.

[0034] Finally, it's worth mentioning that a bag-opening mechanism (not shown, representing existing technology) is connected to the drive shaft 3. This mechanism includes a bag-opening seat and two suction nozzles, a first and a second, that can open the bag opening. Both the first and second suction nozzles are mounted on the bag-opening seat, which is connected to the drive shaft 3. This means the drive shaft 3 can synchronously drive the bag-opening mechanism and the heat-sealing mechanism 6 to rotate together. The bag-opening mechanism can replace the bag-supporting mechanism in sucking open both sides of the bag, allowing the bag to open and continue until it reaches the feeding station. However, using suction nozzles to open the bag cannot guarantee that it will be fully opened, which may affect subsequent feeding.

Claims

1. A rotary packaging machine, comprising a frame, a rotary table (1), and a heat sealing mechanism (6), wherein the heat sealing mechanism (6) includes a heat sealing seat (60) and two heat sealing heads (61), the two heat sealing heads (61) being mounted on the heat sealing seat (60), and a drive shaft (3) passing through the center of the rotary table (1), the drive shaft (3) being connected to a power source for transmission, characterized in that: The heat sealing seat (60) of the heat sealing mechanism (6) is connected to the transmission shaft (3) for transmission. The rotation of the transmission shaft (3) can drive the heat sealing mechanism (6) to swing back and forth.

2. The rotary packaging machine according to claim 1, characterized in that: The transmission shaft (3) is connected to a bag-supporting mechanism (4). The bag-supporting mechanism (4) includes a bag-supporting seat (40) and two first bag-supporting plates (41) and second bag-supporting plates (42) that can open the bag opening. The first bag-supporting plate (41) and the second bag-supporting plate (42) are both installed on the bag-supporting seat (40), and the bag-supporting seat (40) is connected to the transmission shaft (3).

3. A rotary packaging machine according to claim 2, characterized in that: The first support arm (44) is hinged to the support base (40). The first support arm (44) has a first connecting arm (441) and a first transmission arm (442) forming an angle. The first support plate (41) is connected to the first connecting arm (441). The second support arm (43) is hinged to the support base (40). The second support arm (43) has a second connecting arm (431) and a second transmission arm (432) forming an angle. The second support plate (42) is connected to the second connecting arm (431). The first transmission arm (442) and the second transmission arm (432) are hinged together.

4. A rotary packaging machine according to claim 3, characterized in that: A bag support transmission seat (46) is hinged to the bag support seat (40), and a bag support pull rod (45) is hinged to the bag support transmission seat (46). The first bag support arm (44) has a first actuating arm (443) that forms an angle with the first transmission arm (442). The bag support pull rod (45) is hinged to the first actuating arm (443). An action block is connected to the frame. A force-receiving wheel (47) is provided on the bag support transmission seat (46). The rotation of the bag support seat (40) can cause the action block to act on the force-receiving wheel (47).

5. A rotary packaging machine according to claim 1, 2, 3 or 4, characterized in that: A crossbeam (5) is installed on the frame. The heat sealing seat (60) of the heat sealing mechanism (6) is rotatably installed on the crossbeam (5). The rotation axis of the heat sealing seat (60) is coaxial with the transmission shaft (3). A vertically extending lifting guide rail (7) is connected to the transmission shaft (3). A slide (8) is connected to the heat sealing seat (60). The slide (8) is slidably mounted on the lifting guide rail (7). The power source can drive the transmission shaft (3) to move up and down and rotate back and forth around the axis.

6. A rotary packaging machine according to claim 5, characterized in that: The power source is connected to the transmission shaft (3) via a transmission assembly. The transmission assembly includes a lifting cam (31), a swing cam (30), a transmission shaft connecting seat (38), a lifting swing arm (33), and a swing swing arm (32). The lower end of the transmission shaft (3) is connected to the transmission shaft connecting seat (38), which is hinged to one end of the lifting swing arm (33). The other end of the lifting swing arm (33) is rotatably mounted. A lifting roller (36) is connected to the lifting swing arm (33). The lifting roller (36) is located at the lifting... The cam (31) is located in the lifting cam groove (310); the drive shaft (3) is connected to the rocker arm (35), the rocker arm (35) is connected to one end of the pull rod (34) through the joint bearing (39), the other end of the pull rod (34) is hinged to one end of the swing arm (32), the other end of the swing arm (32) is rotatably mounted, the swing arm (32) is connected to a swing roller, the swing roller is located in the swing cam groove (300) of the swing cam (30); the power source can drive the lifting cam (31) and the swing cam (30) to rotate.

7. A rotary packaging machine according to claim 1, characterized in that: The heat sealing seat (60) is provided with parallel upper guide rail (63) and lower guide rail (64). An upper slider (65) is provided on the upper guide rail (63), and a first heat sealing head (61) is connected to the upper slider (65). A lower slider (66) is provided on the lower guide rail (64), and a second heat sealing head (61) is connected to the lower slider (66). A transmission arm (67) that can rotate around a center is hinged to the heat sealing seat (60). One end of the transmission arm (67) is hinged to one end of the upper pull rod (68), the other end of the upper pull rod (68) is hinged to the upper slider (65), the other end of the transmission arm (67) is hinged to one end of the lower pull rod (69), the other end of the lower pull rod (69) is hinged to the lower slider (66), and a heat sealing power source (62) is installed on the heat sealing seat (60). The heat sealing power source (62) can drive the upper slider (65) and the lower slider (66) to move.

8. A rotary packaging machine according to claim 1, characterized in that: The heat-sealing seat (60) is provided with a nitrogen filling mechanism (9), which includes a nitrogen filling pipe (90) and a nitrogen pipe power source (91) for driving the nitrogen filling pipe (90) to move up and down. The lower end of the nitrogen filling pipe (90) is flat.

9. A rotary packaging machine according to claim 8, characterized in that: The nitrogen filling mechanism (9) includes a three-way valve (F), the first port (F1) of the three-way valve (F) is connected to the nitrogen filling pipe (90), the second port (F2) of the three-way valve (F) is connected to the nitrogen source, and the third port (F3) of the three-way valve (F) is connected to the negative pressure source.

10. A rotary packaging machine according to claim 1, characterized in that: A bag opening mechanism is connected to the drive shaft (3). The bag opening mechanism includes a bag opening seat and two suction nozzles, a first suction nozzle and a second suction nozzle, which can suck open the bag opening. The first suction nozzle and the second suction nozzle are both installed on the bag opening seat, and the bag opening seat is connected to the drive shaft (3).

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