Rotating disc type bag feeding packaging machine

Abstract

The invention relates to a rotating disc type bag feeding packaging machine capable of remarkably improving packaging efficiency. The rotating disc type bag feeding packaging machine comprises a machine frame, a rotating disc and a heat sealing mechanism, a plurality of bag clamping units are installed on the edge of the rotating disc along the circumference at equal intervals, the heat sealing mechanism is located above the bag clamping units, the heat sealing mechanism comprises a heat sealing base and a heat sealing head, the heat sealing head is installed on the heat sealing base, and a transmission shaft penetrates through the center of the rotating disc. The transmission shaft is in transmission connection with the power source, and is characterized in that the heat sealing seat of the heat sealing mechanism is in transmission connection with the transmission shaft, and the transmission shaft can rotate to drive the heat sealing mechanism to swing back and forth; a bag opening mechanism is connected to the transmission shaft and comprises a bag opening seat, a first bag opening plate and a second bag opening plate, the first bag opening plate and the second bag opening plate can open a bag opening, the first bag opening plate and the second bag opening plate are both installed on the bag opening seat, and the bag opening seat is connected to the transmission shaft. The heat sealing mechanism of the rotating disc type bag feeding 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] The present invention relates to a packaging machine, in particular to a rotary disc bag-feeding packaging machine. Background Art

[0002] A turntable-type bag-feeding packaging machine is used to package foods such as pickles, mustard greens, and kimchi. Its core structure comprises a turntable with bag-clamping units distributed around its circumference (see CN113800049B and CN103241410B). Sequentially arranged around the turntable's periphery are the bag-loading, bag-opening, bag-supporting, material-adding, heat-sealing, and bag-unloading stations. In the traditional process, the bag-clamping unit carries the packaging bags as the turntable rotates intermittently, pausing at each station to complete the corresponding work. The heat-sealing station is equipped with a heat-sealing mechanism. Existing heat-sealing mechanisms are fixed in place, sealing the bags on the turntable only after the turntable stops. Once heat-sealing is complete, the turntable rotates to allow the bags to pass to the next station. However, this heat-sealing method requires the turntable to stop and wait for the heat-sealing to complete, resulting in a long waiting time and severely restricting the packaging rate. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the present invention innovatively provides a turntable bag-feeding packaging machine that can significantly improve packaging efficiency.

[0004] This turntable bag-feeding packaging machine includes a frame, a turntable and a heat-sealing mechanism, a plurality of bag-clamping units are installed at equal intervals along the circumference of the edge of the turntable, the heat-sealing mechanism is located above the bag-clamping unit, the heat-sealing mechanism includes a heat-sealing seat and a heat-sealing head, the heat-sealing head is installed on the heat-sealing seat, a transmission shaft is passed through the center of the turntable, the transmission shaft is connected to the power source, and is characterized in that: the heat-sealing seat of the heat-sealing mechanism is connected to the transmission shaft, and the rotation of the transmission shaft can drive the heat-sealing mechanism to swing back and forth; a bag-supporting mechanism is connected to the transmission shaft, the bag-supporting mechanism includes a bag-supporting seat and two first bag-supporting plates and a second bag-supporting plate that can support the bag opening, the first bag-supporting plate and the second bag-supporting plate are both installed on the bag-supporting seat, and the bag-supporting seat is connected to the transmission shaft.

[0005] The bag supporting seat is hingedly connected to a first bag supporting arm, the first bag supporting arm has a first connecting arm and a first transmission arm forming an angle, and the first bag supporting plate is connected to the first connecting arm; the bag supporting seat is hingedly connected to a second bag supporting arm, 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, and the first transmission arm and the second transmission arm are hinged together.

[0006] The bag holding seat is hinged with a bag holding transmission seat, and the bag holding rod is hinged with the bag holding transmission seat. The first bag holding arm has a first toggle arm that forms an angle with the first transmission arm. The bag holding rod is hinged to the first toggle arm. An action block is connected to the frame, and a force wheel is provided on the bag holding transmission seat. The bag holding seat can rotate to cause the action block to act on the force wheel.

[0007] A crossbeam is installed on the frame, and the heat sealing seat of the heat sealing mechanism is rotatably installed on the crossbeam. The rotation axis of the heat sealing seat is coaxial with the transmission shaft. The transmission shaft is connected with a lifting guide rail extending up and down. The heat sealing seat is connected with a slide, and the slide is slidably arranged on the lifting guide rail; the power source can drive the transmission shaft to move up and down and rotate back and forth around the axis.

[0008] The power source is connected to the transmission shaft through a transmission assembly, and the transmission assembly includes a lifting cam, a swing cam, a transmission shaft connecting seat, a lifting swing arm and a swing swing arm. The lower end of the transmission shaft is connected to the transmission shaft connecting seat, and the transmission shaft connecting seat is hinged to one end of the lifting swing arm, and the other end of the lifting swing arm is rotatably installed. The lifting swing arm is connected with a lifting roller, and the lifting roller is located in the lifting cam groove of the lifting cam. The transmission shaft is connected to the rocker arm, and the rocker arm is connected to one end of the pull rod through a joint 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 installed. The swing swing arm is connected with a swing roller, 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.

[0009] The heat sealing seat is provided with a parallel upper guide rail and a lower guide rail, the upper guide rail is provided with an upper slider, the first heat sealing head is connected to the upper slider, the lower guide rail is provided with a lower slider, the second heat sealing head is connected to the lower slider, the heat sealing seat is hinged with a transmission arm that can rotate around the center, one end of the transmission arm is hinged to one end of the upper pull rod, 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 the lower pull rod, the other end of the lower pull rod is hinged to the lower slider, and a heat sealing power source is installed on the heat sealing seat, and the heat sealing power source can drive the upper slider and the lower slider to move.

[0010] The heat sealing seat is provided with a nitrogen filling mechanism, which includes a nitrogen filling pipe and a nitrogen pipe power source for driving the nitrogen filling pipe to move up and down, and the lower end of the nitrogen filling pipe is flat.

[0011] The nitrogen filling mechanism includes a three-way valve, a first interface of the three-way valve is connected to the nitrogen filling pipe, a second interface of the three-way valve is connected to the nitrogen source, and a third interface of the three-way valve is connected to the negative pressure source.

[0012] The bag clamping unit includes two left and right clamping hands.

[0013] According to the turntable bag-feeding packaging machine provided by the present invention, the heat sealing mechanism rotates along with the turntable during heat sealing, thereby utilizing the rotation time of the turntable and significantly improving the packaging efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 Schematic diagram of the heat sealing mechanism Figure 1 ; Figure 3 Schematic diagram of the heat sealing mechanism Figure 2 ; Figure 4 Schematic diagram of the structure of the bag-supporting mechanism; Figure 5 This is the transmission principle diagram of the transmission shaft; Figure 6 for Figure 5 A partial enlarged view of point A in the middle; Figure 7 Schematic diagram of the connection between the three-way valve and the nitrogen filling pipe. DETAILED DESCRIPTION

[0015] like Figure 1 As shown, this turntable-type bag-feeding packaging machine includes a frame (the frame is not shown), a turntable 1, and a heat-sealing mechanism 6. A plurality of bag-clamping units 2 (the bag-clamping units 2 are used to clamp the bags, which is a prior art) are installed at the edge of the turntable 1 at equal intervals along the circumference. The heat-sealing mechanism 6 is located above the bag-clamping units 2. When the turntable 1 rotates under the drive of a rotary power source, the bag-clamping units 2 clamp the bags and come to the bottom of the heat-sealing mechanism 6, which then 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 installed on the heat sealing seat 60. The two heat sealing heads 61 can heat seal the bag opening by moving relative to each other; Figure 1 As shown, a transmission shaft 3 is provided at the center of the turntable 1 (the two are not connected, and the transmission shaft 3 can rotate relative to the turntable 1). The transmission shaft 3 is connected to the power source, and the heat sealing seat 60 of the heat sealing mechanism 6 is connected to the transmission shaft 3. The rotation of the transmission shaft 3 can drive the heat sealing mechanism 6 to swing back and forth.

[0016] During operation, the turntable 1 rotates intermittently, and the bag clamping unit 2 on the turntable 1 goes to the bag loading station, bag opening station, bag holding station (the bag opening station and bag holding station can also be the same station), feeding station, heat sealing station and bag unloading station in turn; bag loading is completed at the bag loading station, bag opening is completed at the bag opening station, bag holding is completed at the bag holding station (when the bag opening station and bag holding station are the same station, the bag is held immediately after opening), feeding is completed at the feeding station, sealing is completed at the heat sealing station, and bag unloading is completed at the bag unloading station, thus completing all the packaging work. When the bag clamping unit 2 on the turntable 1 arrives at the heat sealing station, the heat sealing mechanism 6 begins to heat seal the bag opening. At this time, the turntable 1 does not need to wait for the heat sealing to be completed before rotating. Instead, the turntable 1 can rotate immediately, and the heat sealing mechanism 6 also rotates together with the drive shaft 3. That is to say, the heat sealing mechanism 6 rotates together with the turntable 1. During the period when the heat sealing mechanism 6 rotates together with the turntable 1, the bag is heat sealed. In this way, the time when the turntable 1 rotates is utilized for heat sealing, and there is no need to set aside heat sealing time, thereby greatly improving the packaging efficiency. When the heat sealing mechanism 6 completes the heat sealing, the drive shaft 3 rotates to drive the heat sealing mechanism 6 to swing back immediately, waiting for the next heat sealing. It is worth mentioning here that the power source for driving the drive shaft 3 to rotate and the rotary power source for driving the turntable 1 to rotate can be the same power source. The same power source drives the drive shaft 3 and the turntable 1 to rotate through a cam or other transmission structure. Of course, it can be driven by two independent power sources.

[0017] As mentioned above, the bag clamping unit 2 on the turntable 1 needs to go to the bag-stretching station, where it completes the bag-stretching process to facilitate subsequent feeding. The bag-stretching process is completed by the bag-stretching mechanism 4. Since the bag-stretching mechanism 4 needs to stretch the bag and hold it there, and then follow the bag to the feeding station, the bag-stretching mechanism 4 also needs to swing back and forth. Figure 1 As shown, the transmission shaft 3 is connected to a bag-supporting mechanism 4. Figure 4As shown, the bag-opening mechanism 4 includes a bag-opening seat 40 and two first and second bag-opening plates 41, 42, which can hold the bag opening open. Both the first and second bag-opening plates 41, 42 are mounted on the bag-opening seat 40, which is connected to the transmission shaft 3. With this structure, rotation of the transmission shaft 3 simultaneously drives the bag-opening mechanism 4 and the heat-sealing mechanism 6 to rotate. Rotation of the bag-opening mechanism 4 allows the bag on one of the bag-clamping units 2 to remain open during its transition from the bag-opening station to the feeding station, while rotation of the heat-sealing mechanism 6 allows the bag on the other bag-clamping unit 2 to remain heat-sealed during its transition from the heat-sealing station to the bag-unloading station. Since the rotation amplitude and frequency of all the bag clamping units 2 on a turntable 1 are consistent, the rotation amplitude and frequency of the bag holding mechanism 4 and the heat sealing mechanism 6 must also be adjusted to be consistent. Since one power source and one transmission shaft 3 can drive the bag holding mechanism 4 and the heat sealing mechanism 6 to move synchronously, as long as the rotation amplitude and frequency of the transmission shaft 3 are well controlled, it can be ensured that the rotation of the bag holding mechanism 4 and the heat sealing mechanism 6 is consistent with the rotation of the bag clamping unit 2, which significantly reduces the difficulty of controlling the rotation of the bag holding mechanism 4 and the heat sealing mechanism 6 and ensures the consistency of the rotation of the bag holding mechanism 4 and the heat sealing mechanism 6. At the same time, since only one power source and one transmission shaft 3 are used, the complexity and manufacturing cost of the equipment can be greatly reduced.

[0018] In order to drive the first bag supporting plate 41 and the second bag supporting plate 42 to move relative to each other, as shown in FIG. Figure 4 As shown, a first bag supporting arm 44 is hingedly connected to the bag supporting seat 40, and the first bag supporting arm 44 has a first connecting arm 441 and a first transmission arm 442 that form an angle, and the first bag supporting plate 41 is connected to the first connecting arm 441; a second bag supporting arm 43 is hingedly connected to the bag supporting seat 40, and the second bag supporting arm 43 has a second connecting arm 431 and a second transmission arm 432 that form an angle, the second bag supporting plate 42 is connected to the second connecting arm 431, and the first transmission arm 442 and the second transmission arm 432 are hinged together. During operation, under power drive, the first bag-supporting arm 44 or the second bag-supporting arm 43 rotates, and the first bag-supporting plate 41 and the second bag-supporting plate 42 can move away from each other or move closer to each other; the bag opening is opened by the bag-opening mechanism at the bag-opening station (the bag-opening mechanism is the existing technology, including two left and right suction nozzles, and the two suction nozzles suck the bag open from the left and right sides of the bag). When the first bag-supporting plate 41 and the second bag-supporting plate 42 move closer to each other, the bag can be entered; when the first bag-supporting plate 41 and the second bag-supporting plate 42 move away from each other, the bag opening can be opened.

[0019] In order to drive the first bag holding arm 44 or the second bag holding arm 43 to rotate, Figure 4As shown, a bag supporting transmission seat 46 is hinged on the bag supporting seat 40, a bag supporting rod 45 is hinged on the bag supporting transmission seat 46, the first bag supporting arm 44 has a first toggle arm 443 that forms an angle with the first transmission arm 442, the bag supporting rod 45 is hinged to the first toggle arm 443, and an action block (not shown, the action block is fixed) is connected to the frame, and a force-bearing wheel 47 is provided on the bag supporting transmission seat 46. The rotation of the bag supporting seat 40 can cause the action block to act on the force-bearing wheel 47. When the transmission shaft 3 rotates and the bag is transferred to the bag opening station, the bag supporting seat 40 rotates with the bag supporting transmission seat 46, so that the force wheel 47 on the bag supporting transmission seat 46 also rotates, and the force wheel 47 acts on the action block (it can also be said that the action block acts on the force wheel 47), causing the bag supporting transmission seat 46 to further rotate relative to the bag supporting seat 40, so that the bag supporting transmission seat 46 pulls the bag supporting rod 45, and the bag supporting rod 45 pulls the first bag supporting arm 44, so that the first bag supporting plate 41 and the second bag supporting plate 42 move closer to each other, so that they can enter the bag; when the transmission shaft 3 rotates and the bag starts to turn to the feeding station, the action block gradually moves away from the force wheel 47, the force wheel 47 is gradually unloaded, and the first bag supporting plate 41 and the second bag supporting plate 42 gradually open under their own weight, thereby opening the bag mouth. It is worth mentioning here that an independent bag-holding power source can be set up to drive the bag-holding transmission seat 46, and the structure of the action block and the force-bearing wheel 47 can be used to utilize the force of the rotation of the transmission shaft 3 to activate the bag-holding mechanism 4, thereby saving a power source and reducing manufacturing costs.

[0020] Since the bag-holding mechanism 4 needs to move up and down so that the first and second bag-holding plates 41 and 42 can be inserted into the bag from above, the power source must not only drive the transmission shaft 3 to rotate back and forth around the axis, but also 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 drives the bag-holding mechanism 4 and the heat-sealing mechanism 6 to rotate synchronously. To solve the problem, as Figure 1 and Figure 2 As shown, a crossbeam 5 is mounted on the frame (the frame is not shown, the crossbeam 5 is fixedly mounted on the frame), and a 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 transmission shaft 3 (that is, the rotating shaft 50 is coaxial with the transmission shaft 3). Figure 1As shown, the transmission shaft 3 is connected to a vertically extending lifting guide rail 7, while the heat-sealing seat 60 is connected to a slide 8, which slides on the lifting guide rail 7 (the slide 8 and the lifting guide rail 7 are in a sliding relationship with each other; the slide 8 can also be referred to as the lifting guide rail 7, and the lifting guide rail 7 can also be referred to as the slide 8). With this structure, when the transmission shaft 3 moves up and down, driving the bag-holding mechanism 4 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 transmission shaft 3 rotates, the transmission shaft 3 drives the bag-holding mechanism 4 to rotate, and at the same time, the connection between the slide 8 and the lifting guide rail 7 drives the heat-sealing seat 60 to rotate about the rotating axis 50, thereby enabling the heat-sealing mechanism 6 to rotate. With this structure, a single transmission shaft 3 can both drive the heat-sealing mechanism 6 and the bag-holding mechanism 4 to rotate synchronously, and can also drive the bag-holding mechanism 4 to move up and down without driving the heat-sealing mechanism 6 up and down.

[0021] It is worth mentioning here that an independent power source can also be set to drive the bag-holding mechanism 4 to move up and down relative to the transmission shaft 3, so that the transmission shaft 3 does not need to move up and down, and there is no need to set a slide 8 and a lifting guide rail 7 between the heat sealing mechanism 6 and the transmission shaft 3.

[0022] In the case where the transmission shaft 3 has the function of moving up and down, in order to be able to drive the transmission shaft 3 to rotate back and forth around the axis, it is also necessary to be able to drive the transmission shaft 3 to move up and down, such as Figure 5 and Figure 6As shown, the power source is connected to the transmission shaft 3 through a transmission assembly, which 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, and the transmission shaft connecting seat 38 is hinged to one end of the lifting swing arm 33 through 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, and the lifting roller 36 is located in the lifting cam groove 310 of the lifting cam 31. When the lifting cam 31 rotates, the lifting swing arm 33 can be driven to swing through the lifting roller 36, and the lifting swing arm 33 can drive the transmission shaft 3 to move up and down; in addition, the transmission shaft 3 is connected to the rocker arm 35, and the rocker arm 35 is connected to one end of the pull rod 34 through a joint bearing 39 (the pull rod 34 is connected to the joint shaft The pull rod 34 is connected to a bearing 39, which is connected to a connecting rod 390, which is connected to a rocker arm 35. The other end of the pull rod 34 is hingedly connected to one end of a swing arm 32, the other end of which is rotatably mounted on the frame. A swing roller (not shown) is connected to the swing arm 32, which is located in a swing cam groove 300 of the swing cam 30. When the swing cam 30 rotates, the swing roller drives the swing arm 32 to swing, which in turn pulls the rocker arm 35 and the transmission shaft 3 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. With only a single power source to drive the output shaft, the lifting cam 31 and the swing cam 30 rotate synchronously, thereby driving the transmission shaft 3 to both move up and down and rotate about its axis. Because a single power source transmits power to both cams, the transmission shaft 3 achieves greater consistency in movement and more stable and reliable operation.

[0023] In order to drive the two heat sealing heads 61 to move, Figure 2 As shown, a parallel upper guide rail 63 and a lower guide rail 64 are provided on the heat sealing seat 60, an upper slider 65 is provided on the upper guide rail 63, the 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 the second heat sealing head 61 is connected to the lower slider 66, as shown in FIG. Figure 3 As shown, a transmission arm 67 that can rotate around the center is hinged on the heat sealing seat 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 seat 60. The heat sealing power source 62 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 to wait for the bag to enter. The two heat sealing heads 61 can move closer to each other to seal the bag opening. The bag clamping unit 2 includes two left and right clamping hands (which are prior art), and the two clamping hands can clamp the two edges of the bag.

[0024] In order to improve the packaging and preservation effect, a nitrogen filling mechanism 9 is provided on the heat sealing seat 60. 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 up and down. The lower end of the nitrogen filling pipe 90 is flat. When the bag reaches the heat sealing station, the nitrogen pipe power source 91 drives the nitrogen filling pipe 90 downward and inserts it into the bag. The two heat sealing heads 61 move closer to each other. Due to the flat lower end of the nitrogen filling pipe 90, the two heat sealing heads 61 clamp the lower end of the nitrogen filling pipe 90 and simultaneously clamp the bag opening to prevent nitrogen from leaking out. The nitrogen filling pipe 90 then fills the bag with nitrogen. Once the bag is filled with nitrogen (nitrogen replaces air, effectively reducing the oxygen content of the packaging bag, slowing the oxidation rate of the food and the growth of bacteria, ensuring the freshness and safety of the 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 operations are both carried out while the turntable 1 rotates.

[0025] Finally, it is worth mentioning that in order to quickly fill nitrogen, such as Figure 7 As shown, the nitrogen filling mechanism 9 includes a three-way valve F. A first port F1 of the three-way valve F is connected to the nitrogen filling pipe 90, a second port F2 of the three-way valve F is connected to a nitrogen source, and a third port F3 of the three-way valve F is connected to a negative pressure source (a negative pressure source includes a vacuum pump, vacuum generator, or other device capable of generating negative pressure). During operation, the negative pressure source first evacuates the air from the bag, and then nitrogen is refilled into the bag through the nitrogen source. This significantly increases the nitrogen filling speed and nitrogen concentration, thereby enhancing the freshness preservation effect.

Claims

1. A turntable-type bag-feeding packaging machine, comprising a frame, a turntable (1) and a heat-sealing mechanism (6), wherein a plurality of bag-clamping units (2) are equally spaced along the circumference of the edge of the turntable (1), the heat-sealing mechanism (6) is located above the bag-clamping units (2), the heat-sealing mechanism (6) comprises a heat-sealing seat (60) and a heat-sealing head (61), the heat-sealing head (61) being mounted on the heat-sealing seat (60), a transmission shaft (3) passing through the center of the turntable (1), the transmission shaft (3) being in transmission connection with a power source, and characterized in that: The heat sealing seat (60) of the heat sealing mechanism (6) is in transmission connection with the transmission shaft (3), and the rotation of the transmission shaft (3) can drive the heat sealing mechanism (6) to swing back and forth; the transmission shaft (3) is connected to a bag-supporting mechanism (4), and the bag-supporting mechanism (4) comprises a bag-supporting seat (40) and two first bag-supporting plates (41) and second bag-supporting plates (42) capable of supporting the bag opening; the first bag-supporting plates (41) and the second bag-supporting plates (42) are both mounted on the bag-supporting seat (40), and the bag-supporting seat (40) is connected to the transmission shaft (3).

2. The rotary bag-feeding packaging machine according to claim 1, characterized in that: The bag support seat (40) is hingedly connected to a first bag support arm (44), the first bag support arm (44) having a first connecting arm (441) and a first transmission arm (442) forming an angle, and the first bag support plate (41) is connected to the first connecting arm (441); the bag support seat (40) is hingedly connected to a second bag support arm (43), the second bag support arm (43) having a second connecting arm (431) and a second transmission arm (432) forming an angle, the second bag support plate (42) is connected to the second connecting arm (431), and the first transmission arm (442) and the second transmission arm (432) are hingedly connected together.

3. A rotary bag-feeding packaging machine according to claim 2, characterized in that: The bag-supporting seat (40) is hinged with a bag-supporting transmission seat (46), and the bag-supporting pull rod (45) is hinged with the bag-supporting transmission seat (46). The first bag-supporting arm (44) is provided with a first toggle arm (443) forming an angle with the first transmission arm (442). The bag-supporting pull rod (45) is hinged with the first toggle arm (443). An action block is connected to the frame, and a force-bearing wheel (47) is provided on the bag-supporting transmission seat (46). The bag-supporting seat (40) rotates to enable the action block to act on the force-bearing wheel (47).

4. A rotary disc bag-feeding packaging machine according to claim 1, 2 or 3, characterized in that: A crossbeam (5) is mounted on the frame, and a heat-sealing seat (60) of the heat-sealing mechanism (6) is rotatably mounted on the crossbeam (5). The rotation axis of the heat-sealing seat (60) is coaxial with the transmission shaft (3). The transmission shaft (3) is connected to a lifting guide rail (7) extending up and down. The heat-sealing seat (60) is connected to a slide (8), and 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.

5. The rotary bag-feeding packaging machine according to claim 4, characterized in that: The power source is connected to the transmission shaft (3) through a transmission assembly, and 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), and the transmission shaft connecting seat (38) is hinged to one end of the lifting swing arm (33). The other end of the lifting swing arm (33) can be rotatably installed. The lifting swing arm (33) is connected to a lifting roller (36), and the lifting roller (36) is located at the lifting position. The cam (31) is in the lifting cam groove (310); the transmission shaft (3) is connected to the rocking rod (35), the rocking rod (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, and 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.

6. The rotary bag-feeding packaging machine according to claim 1, characterized in that: The heat sealing seat (60) is provided with an upper guide rail (63) and a lower guide rail (64) which are parallel to each other. The upper guide rail (63) is provided with an upper slider (65). The first heat sealing head (61) is connected to the upper slider (65). The lower guide rail (64) is provided with a lower slider (66). The second heat sealing head (61) is connected to the lower slider (66). The heat sealing seat (60) is hinged with a transmission arm (67) which can rotate around the center. The transmission arm ( 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), and the heat sealing power source (62) can drive the upper slider (65) and the lower slider (66) to move.

7. The rotary bag-feeding packaging machine according to claim 1, characterized in that: A nitrogen filling mechanism (9) is provided on the heat sealing seat (60), and the nitrogen filling mechanism (9) comprises 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.

8. The rotary disc bag-feeding packaging machine according to claim 7, characterized in that: The nitrogen filling mechanism (9) comprises a three-way valve (F), a first interface (F1) of the three-way valve (F) being connected to a nitrogen filling pipe (90), a second interface (F2) of the three-way valve (F) being connected to a nitrogen source, and a third interface (F3) of the three-way valve (F) being connected to a negative pressure source.

9. The rotary bag-feeding packaging machine according to claim 1, characterized in that: The bag clamping unit (2) comprises two left and right clamping hands.

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