Food packaging bag pressing device

Abstract

The present invention provides a food packaging bag pressing device, which belongs to the field of food packaging technology, and includes a bottom plate, a driving component, an air supply component, a semicircular plate and an inner support component. A holding seat is fixedly provided on the upper part of the bottom plate, and the holding seat is used to provide support for the packaging bag. The semicircular plates are provided in two groups, and the two groups of semicircular plates are respectively arranged on opposite sides of the holding seat. An arc plate is fixedly provided on the upper part of the two groups of semicircular plates. The driving component is installed on the upper part of the bottom plate, and is used to drive the two groups of semicircular plates to move toward each other, so that the two groups of semicircular plates are clamped to the outside of the holding seat and closed into a cylindrical structure. The inner support component is arranged above the holding seat. Compared with the prior art, the embodiment of the present invention can perform contactless pressing and exhausting of excess air inside the packaging bag, thereby effectively preventing the phenomenon that the food inside the packaging bag is damaged during the exhaust process of the packaging bag, and improving the protection of the packaging bag during exhaust.

Description

Technical Field

[0001] The invention belongs to the technical field of food packaging, in particular to a food packaging bag pressing device. Background Art

[0002] After food processing is completed, it usually needs to be packaged. The packaging operation is completed by putting the processed food into a packaging bag and then sealing the packaging bag.

[0003] At present, when food is put into packaging bags, outside air often enters the packaging bags together with the food, causing the packaging bags to be swollen after being sealed. The swollen packaging bags are easily subjected to external pressure and then ruptured. Therefore, it is necessary to discharge the excess air inside the packaging bags after the food is bagged and before the bags are sealed. In the prior art, the operation of discharging the excess air inside the packaging bags is mostly performed by squeezing the packaging bags with the help of squeezing components such as pressure plates. When the squeezing components squeeze the packaging bags, the food in the packaging bags is easily subjected to greater pressure and then broken, thereby causing food damage. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a food packaging bag pressing device.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A food packaging bag pressing device comprises a bottom plate, a driving assembly, an air supply assembly, a semicircular plate and an inner support assembly.

[0007] A holding seat is fixedly provided on the upper portion of the bottom plate, and the holding seat is used to provide support for the packaging bag.

[0008] The semicircular plates are provided in two groups, and the two groups of semicircular plates are respectively arranged on opposite sides of the containing seat, and arc plates are fixedly arranged on the upper parts of the two groups of semicircular plates.

[0009] The driving assembly is installed on the upper part of the bottom plate, and is used to drive the two groups of semicircular plates to move toward each other, so that the two groups of semicircular plates are clamped to the outside of the containing seat and closed into a cylindrical structure.

[0010] The inner support assembly is arranged above the containing seat. After the two groups of the semicircular plates are closed into a cylindrical structure, the inner support assembly is used to provide support to the packaging bag from the inner side of the bag opening, so that the bag opening of the packaging bag is in close contact with the two groups of the arc-shaped plates.

[0011] The air supply assembly is arranged outside the two groups of semicircular plates. After the two groups of semicircular plates are closed into a cylindrical structure, the air supply assembly is used to pressurize air into the cylindrical structure.

[0012] As a further improvement of the present invention: two groups of first bracket plates are fixedly arranged on the upper part of the bottom plate, and the two groups of first bracket plates are relatively distributed.

[0013] The driving assembly includes a motor, a driving plate and a rotating shaft.

[0014] The rotating shaft is rotatably arranged between the two groups of the bracket plates, the motor is fixedly arranged on the side wall of one group of the first bracket plates, and is used to drive the rotating shaft to rotate, the rotating shaft is provided with two groups of thread segments on the outside, and the two groups of thread segments rotate in opposite directions, and the driving plates are provided with two groups, one end of the two groups of driving plates is sleeved on the outside of the rotating shaft and respectively threadably cooperates with the two groups of thread segments,

[0015] The air supply assembly includes an air storage cylinder and a piston rod.

[0016] The air cylinders and the piston rods are each provided with two groups, one end of the two groups of air cylinders are respectively fixedly connected to the outer walls of the two groups of semicircular plates, and the other ends are respectively sleeved on the outside of the two groups of piston rods, and the ends of the two groups of piston rods away from the corresponding air cylinders are respectively connected to a group of driving plates, and the two groups of semicircular plates are provided with through holes connected to the piston cylinders.

[0017] As a further improvement of the present invention: one end of the two groups of gas storage cylinders away from the corresponding semicircular plate is also connected to the driving plate through a first elastic member, and the first elastic member is used to provide elastic support for the gas storage cylinders.

[0018] As a further improvement of the present invention: two groups of second bracket plates are fixedly arranged on the upper part of the base plate, the two groups of second bracket plates are relatively distributed, a guide rod is fixedly arranged between the two groups of second bracket plates, and one end of the two groups of drive plates away from the rotating shaft is movably sleeved on the outside of the guide rod.

[0019] As a further improvement of the present invention: an L-shaped support plate is fixedly provided on the upper edge of the bottom plate.

[0020] The inner support assembly includes a cylinder, a support rod, a second elastic member, a piston block, an inner support disk and an annular airbag.

[0021] The upper end of the support rod is fixedly connected to the L-shaped support plate, and the lower end is fixedly connected to the piston block. The column tube is movably sleeved on the piston block and the outside of the support rod. One end of the second elastic member is connected to the inner top wall of the column tube, and the other end is connected to the piston block, so as to provide elastic support for the column tube.

[0022] The inner wall of the cylinder is fixedly provided with an annular stopper at a position above the piston block, the upper surface of the inner support plate is provided with a concave hole at a position inside the cylinder, the inner support plate is fixedly provided at the bottom of the cylinder, and the annular airbag is provided outside the inner support plate.

[0023] An air injection channel is provided inside the inner support disk and is radially distributed along the inner support disk. One end of the air injection channel is connected to the concave hole, and the other end is connected to the inner cavity of the annular airbag. A flexible air pipe is also provided outside the air storage cylinder, and one end of the flexible air pipe away from the air storage cylinder is connected to the inner cavity of the column.

[0024] As a further improvement of the present invention: an exhaust hole is provided on the inner support disk, the exhaust hole vertically penetrates the inner support disk, and the exhaust hole and the gas injection channel are staggered with each other.

[0025] As a further improvement of the present invention: the first elastic member and the second elastic member are springs or metal springs.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] In the embodiment of the present invention, initially, the two groups of semicircular plates are in a state of being away from each other. When it is necessary to perform exhaust treatment on the packaging bag containing food, the packaging bag containing food can be placed on the upper part of the holding seat, and then the driving component is used to drive the two groups of semicircular plates to move toward each other. When the two groups of semicircular plates move toward each other, they are clamped to the outside of the holding seat and closed into a cylindrical structure. At this time, the two groups of arc plates are attached to each other and form an annular structure, and the bag opening of the packaging bag extends from the inside of the annular structure. Then, the inner support component provides support for the packaging bag from the inner side of the bag opening of the packaging bag, so that the packaging bag is tightly attached to the two groups of arc plates. At this point, the two groups of arc plates are attached to each other and form an annular structure. The interior of the cylindrical structure formed by the two groups of semicircular plates is in a relatively sealed environment. Finally, the air supply component is used to pressurize air into the cylindrical structure formed by the two groups of semicircular plates, thereby increasing the internal pressure of the cylindrical structure. The packaging bag located in the cylindrical structure is affected by the increased pressure and shrinks to discharge the excess air inside the packaging bag. Compared with the existing technology, the excess air inside the packaging bag can be pressed and discharged without contact, thereby effectively preventing the food inside the packaging bag from being damaged during the venting process of the packaging bag and improving the protection of the packaging bag during venting. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a food packaging bag pressing device from the right side perspective;

[0029] Figure 2 It is a structural schematic diagram of a food packaging bag pressing device from the left side perspective;

[0030] Figure 3 for Figure 2 A magnified schematic diagram of the middle A area;

[0031] Figure 4 for Figure 2 A magnified schematic diagram of the middle B area;

[0032] In the figure: 10-bottom plate, 101-bracket plate, 102-L-shaped support plate, 103-guide rod, 104-holding seat, 105-second bracket plate, 20-driving assembly, 201-motor, 202-driving plate, 203-threaded section, 204-rotating shaft, 30-air supply assembly, 301-air storage cylinder, 302-piston rod, 303-first elastic member, 304-flexible air pipe, 40-semicircular plate, 401-through hole, 402-arc plate, 50-inner support assembly, 501-column, 502-annular stopper, 503-support rod, 504-second elastic member, 505-piston block, 506-inner support disk, 5061-exhaust hole, 5062-gas injection channel, 5063-concave hole, 507-annular air bag. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] See also Figure 1 as well as Figure 2The present embodiment provides a food packaging bag pressing device, including a bottom plate 10, a driving assembly 20, an air supply assembly 30, a semicircular plate 40 and an inner support assembly 50. A holding seat 104 is fixedly arranged on the upper part of the bottom plate 10. The holding seat 104 is used to provide support for the packaging bag. The semicircular plates 40 are provided with two groups. The two groups of semicircular plates 40 are respectively arranged on opposite sides of the holding seat 104. The upper parts of the two groups of semicircular plates 40 are fixedly provided with arc plates 402. The driving assembly 20 is installed on the upper part of the bottom plate 10 to drive the two groups of semicircular plates 40 The two groups of semicircular plates 40 move toward each other so that they are clamped to the outside of the receiving seat 104 and closed into a cylindrical structure. The inner support component 50 is arranged above the receiving seat 104. After the two groups of semicircular plates 40 are closed into a cylindrical structure, the inner support component 50 is used to provide support to the packaging bag from the inner side of the bag opening of the packaging bag so that the bag opening of the packaging bag is tightly attached to the two groups of arc-shaped plates 402. The air supply component 30 is arranged on the outside of the two groups of semicircular plates 40. After the two groups of semicircular plates 40 are closed into a cylindrical structure, the air supply component 30 is used to pressurize air into the inside of the cylindrical structure.

[0036] Initially, the two groups of semicircular plates 40 are in a state of being away from each other. When the packaging bag containing food needs to be vented, the packaging bag containing food can be placed on the upper part of the receiving seat 104, and then the driving assembly 20 is used to drive the two groups of semicircular plates 40 to move toward each other. When the two groups of semicircular plates 40 move toward each other, they are clamped to the outside of the receiving seat 104 and closed into a cylindrical structure. At this time, the two groups of arc plates 402 are attached to each other and form a ring structure, and the bag mouth of the packaging bag extends from the inside of the ring structure. Then the inner support assembly 50 provides support for the packaging bag from the inner side of the bag mouth of the packaging bag, so that the packaging bag is tightly attached to the two groups of arc plates 402. At this point, the interior of the cylindrical structure formed by the two groups of semicircular plates 40 is in a relatively sealed environment. Finally, the air supply assembly 30 is used to pressurize air into the interior of the cylindrical structure formed by the two groups of semicircular plates 40, thereby increasing the internal pressure of the cylindrical structure. The packaging bag located in the cylindrical structure is affected by the increased pressure and then shrinks to discharge excess air inside the packaging bag.

[0037] See also Figure 1In one embodiment, two groups of first bracket plates 101 are fixedly arranged on the upper part of the bottom plate 10, and the two groups of first bracket plates 101 are relatively distributed. The driving assembly 20 includes a motor 201, a driving plate 202 and a rotating shaft 204. The rotating shaft 204 is rotatably arranged between the two groups of the bracket plates 101. The motor 201 is fixedly arranged on the side wall of one group of the first bracket plates 101, and is used to drive the rotating shaft 204 to rotate. Two groups of thread segments 203 are arranged on the outside of the rotating shaft 204, and the two groups of thread segments 203 rotate in opposite directions. The driving plate 202 is provided with two groups, and the two groups of driving plates 202 One end is sleeved on the outside of the rotating shaft 204 and is respectively threadedly matched with the two groups of threaded sections 203. The air supply assembly 30 includes an air cylinder 301 and a piston rod 302. The air cylinder 301 and the piston rod 302 are each provided with two groups. One end of the two groups of air cylinders 301 are respectively fixedly connected to the outer walls of the two groups of semicircular plates 40, and the other end is respectively sleeved on the outside of the two groups of piston rods 302. The ends of the two groups of piston rods 302 away from the corresponding air cylinders 301 are respectively connected to a group of driving plates 202. The two groups of semicircular plates 40 are provided with through holes 401 connected to the piston cylinder 301.

[0038] After placing the packaging bag containing food on the upper part of the receiving seat 104, the motor 201 drives the rotating shaft 204 to rotate. When the rotating shaft 204 rotates, the two sets of threaded segments 203 cooperate with the threads of the two sets of driving plates 202, thereby driving the two sets of driving plates 202 to move toward each other. When the two sets of driving plates 202 move toward each other, they can drive the two sets of semicircular plates 40 to move toward each other through the piston rod 302 and the air storage cylinder 301 respectively. When the two sets of semicircular plates 40 are clamped on the outside of the receiving seat 104 and closed into a cylindrical structure, the inner support assembly 50 provides support for the packaging bag from the inside of the bag opening. The packaging bag is tightly attached to the two groups of arc plates 402, so that the cylindrical structure formed by the two groups of semicircular plates 40 is in a relatively sealed environment. As the two groups of driving plates 202 continue to move toward each other, the two groups of piston rods 302 can move toward the inside of the two groups of air storage cylinders 301 respectively, and then the air inside the two groups of air storage cylinders 301 is pressed into the inside of the cylindrical structure formed by the two groups of semicircular plates 40 through the through holes 401, thereby increasing the pressure inside the cylindrical structure. The packaging bag located inside the cylindrical structure is affected by the increased pressure and shrinks, thereby causing the excess air inside to be discharged.

[0039] See also Figure 2In one embodiment, one end of the two groups of air cylinders 301 away from the corresponding semicircular plate 40 is also connected to the driving plate 202 through a first elastic member 303. The first elastic member 303 is used to provide elastic support for the air cylinders 301, so that when the rotating shaft 204 rotates and drives the two groups of driving plates 202 to move toward each other, the first elastic member 303 can push the two groups of semicircular plates 404 to move toward each other through the corresponding air cylinders 301, thereby ensuring that the piston rod 302 and the air cylinder 301 are in an extended state, so that after the two groups of semicircular plates 40 are closed into a cylindrical structure, the piston rod 302 can move smoothly into the air cylinder 301, and then smoothly pressurize air into the cylindrical structure.

[0040] See also Figure 1 In one embodiment, two groups of second bracket plates 105 are fixedly provided on the upper part of the base plate 10, and the two groups of second bracket plates 105 are relatively distributed. A guide rod 103 is fixedly provided between the two groups of second bracket plates 105, and one end of the two groups of driving plates 202 away from the rotating shaft 204 is movably sleeved on the outside of the guide rod 103.

[0041] The guide rod 103 guides the driving plate 202 so that the two sets of driving plates 202 can be smoothly and steadily driven to move toward each other when the rotating shaft 204 rotates, so that the two sets of semicircular plates 40 can be accurately clamped outside the receiving seat 104 and closed into a cylindrical structure.

[0042] See also Figure 2 , Figure 3 as well as Figure 4In one embodiment, an L-shaped support plate 102 is fixedly provided on the upper edge of the bottom plate 10, and the inner support assembly 50 includes a column 501, a support rod 503, a second elastic member 504, a piston block 505, an inner support plate 506 and an annular airbag 507. The upper end of the support rod 503 is fixedly connected to the L-shaped support plate 102, and the lower end is fixedly connected to the piston block 505. The column 501 is movably sleeved on the outside of the piston block 505 and the support rod 503. One end of the second elastic member 504 is connected to the inner top wall of the column 501, and the other end is connected to the piston block 505, so as to provide elastic support for the column 501. The inner wall of the column 501 is located at the piston block 505. An annular stopper 502 is fixedly provided at the upper position, a recessed hole 5063 is provided on the upper surface of the inner support disk 506 located at the inner side of the column 501, the inner support disk 506 is fixedly provided at the bottom of the column 501, the annular airbag 507 is provided on the outer side of the inner support disk 506, an air injection channel 5062 is provided inside the inner support disk 506, the air injection channel 5062 is radially distributed along the inner support disk 506, one end of the air injection channel 5062 is connected with the recessed hole 5063, and the other end is connected with the inner cavity of the annular airbag 507, a flexible air pipe 304 is further provided on the outside of the air storage cylinder 301, and the end of the flexible air pipe 304 away from the air storage cylinder 301 is connected with the inner cavity of the column 501.

[0043] Initially, the inner support plate 506 and the annular airbag 507 are located above the packaging bag through the elastic support of the second elastic member 504 on the cylinder 501. When the two groups of semicircular plates 40 are clamped on the outside of the receiving seat 104 and closed into a cylindrical structure, as the two groups of driving plates 202 continue to move toward each other, the two groups of piston rods 302 move toward the inside of the two groups of air storage cylinders 301. At this time, a part of the air inside the air storage cylinders 301 can be pressed through the flexible air pipe 304 to the position below the piston block 505 inside the cylinder 501, thereby pushing the cylinder 501, the inner support plate 506 and the annular airbag 507 to move downward as a whole. When the annular stopper 502 on the inner wall of the cylinder 501 acts on the upper end of the piston block 505, the cylinder 501, the inner support plate 506 and the annular airbag 507 stop moving downward. At this time, the inner support plate 506 and the annular airbag 507 extend into the packaging bag from the bag opening. Inside, as the air continues to enter the column 501, the air can enter the annular airbag 507 through the recessed hole 5063 and the air injection channel 5062 in turn, thereby driving the annular airbag 507 to expand. When the annular airbag 507 expands, the bag mouth of the packaging bag is tightened to the inner wall of the two groups of arc-shaped plates 402, so that the cylindrical structure formed by the two groups of semicircular plates 40 is in a relatively sealed state. After the annular airbag 507 tightens the bag mouth of the packaging bag, as the piston rod 302 continues to move toward the inside of the air storage cylinder 301, the piston rod 302 can press the remaining air inside the air storage cylinder 301 through the through hole 402 to the inside of the cylindrical structure formed by the two groups of semicircular plates 40, thereby driving the internal pressure of the cylindrical structure formed by the two groups of semicircular plates 40 to increase, and the packaging bag located between the two groups of semicircular plates 404 is affected by the increase in pressure and then shrinks, thereby prompting the excess air inside it to be discharged.

[0044] See also Figure 4 In one embodiment, a vent hole 5061 is formed on the inner support disk 506 , and the vent hole 5061 vertically penetrates the inner support disk 506 . The vent hole 5061 and the gas injection channel 5062 are offset from each other.

[0045] When the pressure inside the cylindrical structure formed by the two groups of semicircular plates 40 increases due to the injection of air, the packaging bag located between the two groups of semicircular plates 404 shrinks due to the increase in pressure. During the shrinkage of the packaging bag, the excess air inside the packaging bag can be discharged to the outside through the exhaust holes 5061 on the inner support plate 506.

[0046] In one embodiment, the first elastic member 303 and the second elastic member 504 may be springs or metal springs, which are not limited herein.

[0047] In the embodiment of the present invention, initially, the two groups of semicircular plates 40 are in a state of being away from each other. When the packaging bag containing food needs to be vented, the packaging bag containing food can be placed on the upper part of the holding seat 104, and then the driving assembly 20 is used to drive the two groups of semicircular plates 40 to move toward each other. When the two groups of semicircular plates 40 move toward each other, they are clamped to the outside of the holding seat 104 and closed into a cylindrical structure. At this time, the two groups of arc plates 402 are attached to each other and form an annular structure, and the bag mouth of the packaging bag extends from the inside of the annular structure. Then, the inner support assembly 50 provides support for the packaging bag from the inner side of the bag mouth of the packaging bag, so that the packaging bag and the two groups of arc plates 402 are in a state of being away from each other. 02 are tightly fitted, so that the interior of the cylindrical structure formed by the two groups of semicircular plates 40 is in a relatively sealed environment, and finally the air supply component 30 is used to pressurize air into the cylindrical structure formed by the two groups of semicircular plates 40, so that the internal pressure of the cylindrical structure is increased, and the packaging bag located in the cylindrical structure is affected by the increased pressure and shrinks to discharge the excess air inside the packaging bag. Compared with the existing technology, the excess air inside the packaging bag can be pressed and discharged without contact, thereby effectively preventing the food inside the packaging bag from being damaged during the venting process of the packaging bag, and improving the protection of the packaging bag during venting.

[0048] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A food packaging bag pressing device, characterized in that: It includes a base plate, a driving assembly, an air supply assembly, a semicircular plate and an inner support assembly. A holding seat is fixedly provided on the upper portion of the bottom plate, and the holding seat is used to provide support for the packaging bag. The semicircular plates are provided in two groups, and the two groups of semicircular plates are respectively arranged on opposite sides of the containing seat, and arc plates are fixedly arranged on the upper parts of the two groups of semicircular plates. The driving assembly is installed on the upper part of the bottom plate, and is used to drive the two groups of semicircular plates to move toward each other, so that the two groups of semicircular plates are clamped to the outside of the containing seat and closed into a cylindrical structure. The inner support assembly is arranged above the containing seat. After the two groups of the semicircular plates are closed into a cylindrical structure, the inner support assembly is used to provide support to the packaging bag from the inner side of the bag opening, so that the bag opening of the packaging bag is in close contact with the two groups of the arc-shaped plates. The air supply assembly is arranged outside the two groups of semicircular plates. After the two groups of semicircular plates are closed into a cylindrical structure, the air supply assembly is used to pressurize air into the cylindrical structure. Two groups of first bracket plates are fixedly arranged on the upper part of the bottom plate, and the two groups of first bracket plates are relatively distributed. The driving assembly includes a motor, a driving plate and a rotating shaft. The rotating shaft is rotatably arranged between the two groups of the bracket plates, the motor is fixedly arranged on the side wall of one group of the first bracket plates, and is used to drive the rotating shaft to rotate, the rotating shaft is provided with two groups of thread segments on the outside, and the two groups of thread segments rotate in opposite directions, and the driving plates are provided with two groups, one end of the two groups of driving plates is sleeved on the outside of the rotating shaft and respectively threadably cooperates with the two groups of thread segments, The air supply assembly includes an air storage cylinder and a piston rod. The gas cylinders and the piston rods are provided with two groups, one end of the two groups of gas cylinders is fixedly connected to the outer wall of the two groups of semicircular plates, and the other end is sleeved on the outside of the two groups of piston rods, and the ends of the two groups of piston rods away from the corresponding gas cylinders are connected to one group of driving plates, and the two groups of semicircular plates are provided with through holes connected to the gas cylinders. An L-shaped support plate is fixedly arranged on the upper edge of the bottom plate. The inner support assembly includes a cylinder, a support rod, a second elastic member, a piston block, an inner support disk and an annular airbag. The upper end of the support rod is fixedly connected to the L-shaped support plate, and the lower end is fixedly connected to the piston block. The column tube is movably sleeved on the piston block and the outside of the support rod. One end of the second elastic member is connected to the inner top wall of the column tube, and the other end is connected to the piston block, so as to provide elastic support for the column tube. The inner wall of the cylinder is fixedly provided with an annular stopper at a position above the piston block, the upper surface of the inner support plate is provided with a concave hole at a position inside the cylinder, the inner support plate is fixedly provided at the bottom of the cylinder, and the annular airbag is provided outside the inner support plate. An air injection channel is provided inside the inner support disk and is radially distributed along the inner support disk. One end of the air injection channel is connected to the concave hole, and the other end is connected to the inner cavity of the annular airbag. A flexible air pipe is also provided outside the air storage cylinder, and one end of the flexible air pipe away from the air storage cylinder is connected to the inner cavity of the column.

2. A food packaging bag pressing device according to claim 1, characterized in that: One end of the two groups of gas storage cylinders away from the corresponding semicircular plate is also connected to the driving plate through a first elastic member, and the first elastic member is used to provide elastic support for the gas storage cylinders.

3. A food packaging bag pressing device according to claim 1, characterized in that: Two groups of second bracket plates are fixedly arranged on the upper part of the bottom plate, the two groups of second bracket plates are relatively distributed, a guide rod is fixedly arranged between the two groups of second bracket plates, and one end of the two groups of driving plates away from the rotating shaft is movably sleeved on the outside of the guide rod.

4. A food packaging bag pressing device according to claim 1, characterized in that: An exhaust hole is provided on the inner support plate, and the exhaust hole vertically penetrates the inner support plate. The exhaust hole and the gas injection channel are staggered with each other.

5. A food packaging bag pressing device according to claim 2, characterized in that: The first elastic member and the second elastic member are springs or metal springs.

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