Bag opening device

Abstract

The utility model provides a bag opening device which comprises a supporting plate, a first bag opening mechanism, a second bag opening mechanism and a linkage mechanism, the first bag opening mechanism comprises a first bag opening plate, a first suction cup, a first bag opening air cylinder, a first bag opening base, a first clamping jaw, a first rotating shaft, a first clamping piece and a first jacking column, and the first bag opening plate is rotationally connected to the supporting plate; the first suction cup is arranged on the first bag opening plate, the first bag opening air cylinder is arranged on the first bag opening plate and connected with the first bag opening base, the first clamping jaw is rotationally connected to the first bag opening base through a first rotating shaft and provided with a first abutting end and a first clamping end, and the first clamping piece is arranged on the first bag opening plate. The first jacking column is arranged on the first bag opening plate and located on the lower side of the first abutting end, the first jacking column is used for driving the first clamping end to be close to the first clamping piece, and the second bag opening mechanism is arranged on one side of the first bag opening mechanism. The bag opening device is higher in bag opening efficiency and better in bag opening effect.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging machines, in particular to a bag opening device. Background Art

[0002] Finished products in the food, medicine and other industries are mostly packaged in packaging bags. With the continuous changes in market demand, more and more packaging bags are zippered packaging bags with zippers, and the difficulty of filling finished products has also increased. In the existing automatic packaging machines, the zipper of the bag needs to be opened first before the subsequent further actions such as bag opening, filling and sealing can be completed.

[0003] When a general packaging machine opens a zipper bag, since the zipper at the upper seal of the zipper bag is usually in a closed state after the zipper bag is manufactured, it is necessary to pull open the two sides of the zipper bag so that the upper opening of the zipper bag is opened for loading. However, since the two sides of the zipper bag have a certain suction force after being closed, a certain pulling force is required to open it. The general packaging machine uses the suction cups on both sides to adsorb on both sides of the zipper bag and then open the zipper bag. Although it has good working efficiency, the adsorption effect of the suction cup will deteriorate in a relatively dry environment and after a long period of adsorption, and it is difficult to fully adsorb the surface of the bag, resulting in poor adsorption effect, affecting the overall bag opening efficiency and bag opening effect. Utility Model Content

[0004] The utility model aims to provide a bag opening device, aiming to solve the problems of low bag opening efficiency and poor bag opening effect when the existing packaging machine opens the zipper bag.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A bag opening device is provided, comprising:

[0007] Support plate;

[0008] a first bag opening mechanism, the first bag opening mechanism comprising a first bag opening plate, a first suction cup, a first bag opening cylinder, a first bag opening seat, a first clamping claw, a first rotating shaft, a first clamping piece and a first push column, the first bag opening plate is rotatably connected to the support plate, the first suction cup is arranged on the first bag opening plate, the first bag opening cylinder is arranged on the first bag opening plate, the first bag opening cylinder is connected to the first bag opening seat, the first clamping claw is rotatably connected to the first bag opening seat via the first rotating shaft, the first clamping claw has a first abutting end and a first clamping end, the first clamping piece is arranged on the first bag opening plate, the first push column is arranged on the first bag opening plate and is located at the lower side of the first abutting end, and the first push column is used to drive the first clamping end to approach the first clamping claw;

[0009] a second bag opening mechanism, wherein the second bag opening mechanism is arranged at one side of the first bag opening mechanism, the second bag opening mechanism comprises a second bag opening plate, a second suction cup, a second bag opening cylinder, a second bag opening seat, a second clamping jaw, a second rotating shaft, a second clamping piece and a second top column, the second bag opening plate is rotatably connected to the supporting plate, the second suction cup is arranged on the second bag opening plate, the second bag opening cylinder is arranged on the second bag opening plate, the second bag opening cylinder is connected to the second bag opening seat, the second clamping jaw is rotatably connected to the second bag opening seat via the second rotating shaft, the second clamping jaw has a second abutting end and a second clamping end, the second clamping piece is arranged on the second bag opening plate, the second top column is arranged on the second bag opening plate and is located at the lower side of the second abutting end, and the second top column is used to drive the second clamping end to approach the second clamping piece;

[0010] A linkage mechanism, the linkage mechanism includes a linkage linear drive unit and two linkage gears, the two linkage gears are meshed with each other, one of the linkage gears is connected to the first bag opening plate, and the other linkage gear is connected to the second bag opening plate, the linkage linear drive unit is arranged on the support plate, and the linkage linear drive unit is connected to the first bag opening plate to drive the first bag opening plate to rotate around the axis of one of the linkage gears.

[0011] Optionally, the first bag opening mechanism further includes a first spring, one end of the first spring is connected to the first clamping claw, the other end of the first spring is connected to the first bag opening seat, and the first spring is used to drive the first clamping end away from the first clamping member.

[0012] Optionally, the second bag opening mechanism further includes a second spring, one end of the second spring is connected to the second clamping claw, the other end of the second spring is connected to the second bag opening seat, and the second spring is used to drive the second clamping end away from the second clamping member.

[0013] Optionally, the first bag opening mechanism further includes a first guide column, the first guide column is vertically arranged on the first bag opening plate, and the first bag opening seat is slidably connected to the first guide column.

[0014] Optionally, the second bag opening mechanism further includes a second guide column, the second guide column is vertically arranged on the second bag opening plate, and the second bag opening seat is slidably connected to the second guide column.

[0015] Optionally, the first bag opening mechanism further includes a first pad and a first clamping pad, the first pad is connected to the first bag opening plate, and the first clamping pad is arranged on the first pad.

[0016] Optionally, the second bag opening mechanism further includes a second pad and a second clamping pad, the second pad is connected to the second bag opening plate, and the second clamping pad is arranged on the second pad.

[0017] Optionally, both the first clamping end and the second clamping end are wedge-shaped structures.

[0018] Optionally, the linkage mechanism further includes two linkage rotating shafts, the first bag opening plate is connected to one of the linkage gears via one of the linkage rotating shafts, and the second bag opening plate is connected to the other linkage gear via the other linkage rotating shaft.

[0019] Optionally, the linkage mechanism also includes a bag opening linkage shaft, and the linkage linear drive unit includes a first linkage cylinder and a second linkage cylinder, the fixed end of the first linkage cylinder is connected to the fixed end of the second linkage cylinder, the movable end of the first linkage cylinder is rotatably connected to one end of the bag opening linkage shaft through a fisheye bearing, the other end of the bag opening linkage shaft is connected to the first bag opening plate, and the movable end of the second linkage cylinder is rotatably connected to the support plate through a fisheye bearing.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. In the bag opening device provided by the utility model, a linkage mechanism is used to drive the first bag opening mechanism and the second bag opening mechanism to move closer to or away from each other, thereby realizing the bag opening operation, with higher bag opening efficiency and better bag opening effect.

[0022] 2. In the bag opening device provided by the utility model, when opening the bag, the linked linear drive unit drives the first bag opening plate to rotate. When the first bag opening plate rotates, the engagement between the two linked gears can drive the second bag opening plate to rotate in the opposite direction, that is, the first suction cup and the second suction cup can be driven to approach each other to clamp the packaging bag, and the first suction cup and the second suction cup can be driven away from each other to open the bag opening of the packaging bag. The first suction cup and the second suction cup mainly play the most basic role of adsorbing the bag opening, thereby ensuring the most basic bag opening effect.

[0023] 3. In the bag opening device provided by the utility model, in order to improve the bag opening effect, the utility model adopts the first clamping claw and the second clamping claw to enhance the clamping force on the bag opening. Specifically, the first bag opening cylinder is used to drive the first bag opening seat to drive the first clamping claw to move downward. When the first clamping claw moves down to the first push column, the first push column can relatively push the first abutting end to move upward. According to the lever principle, the first clamping end will approach the first clamping piece, thereby clamping the bag opening of the packaging bag between the first clamping end and the first clamping piece. Similarly, the second clamping end and the second clamping piece can clamp the other side of the bag opening of the packaging bag. Then, the linkage mechanism is used to drive the first bag opening plate and the second bag opening plate to move away from each other, so that the bag opening of the packaging bag can be opened. Compared with the existing bag opening that only relies on suction cup adsorption, the utility model can clamp the bag opening more stably, improve the bag opening effect, ensure that each packaging bag can be successfully opened, and have a better bag opening effect. It avoids re-opening of the bag after bag opening failure, and can effectively improve the work efficiency of the entire bag opening process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 It is a structural schematic diagram of the bag opening device of the utility model;

[0026] Figure 2 It is a structural schematic diagram of the bag opening device of the utility model from another angle;

[0027] Figure 3 It is a front view of the first bag opening mechanism, the second bag opening mechanism and the linkage mechanism of the bag opening device of the utility model;

[0028] Figure 4 It is a structural schematic diagram of the first bag opening mechanism and the linkage mechanism of the bag opening device of the utility model.

[0029] In the figure: 1, support plate; 2, first bag opening mechanism; 21, first bag opening plate; 22, first suction cup; 23, first bag opening cylinder; 24, first bag opening seat; 25, first clamping claw; 251, first abutting end; 252, first clamping end; 26, first rotating shaft; 27, first clamping member; 28, first top column; 29, first spring; 210, first guide column; 211, first pad; 212, first clamping pad; 3, second bag opening mechanism; 31, second bag opening plate; 32, second suction cup; 33, second opening Bag cylinder; 34, second bag opening seat; 35, second clamping claw; 351, second abutting end; 352, second clamping end; 36, second rotating shaft; 37, second clamping member; 38, second top column; 39, second spring; 310, second guide column; 311, second pad; 312, second clamping pad; 4, linkage mechanism; 41, linkage linear drive unit; 411, first linkage cylinder; 412, second linkage cylinder; 42, linkage gear; 43, linkage rotating shaft; 44, bag opening linkage shaft; 5, steering mechanism. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0033] Combine the following Figures 1 to 4 The utility model is described in detail.

[0034] like Figures 1 to 4 As shown, the utility model provides a bag opening device, comprising a support plate 1, a first bag opening mechanism 2, a second bag opening mechanism 3 and a linkage mechanism 4.

[0035] For the convenience of explanation, in this embodiment, each direction is as follows Figure 1 shown.

[0036] Specifically, the first bag opening mechanism 2 includes a first bag opening plate 21, a first suction cup 22, a first bag opening cylinder 23, a first bag opening seat 24, a first clamping claw 25, a first rotating shaft 26, a first clamping member 27 and a first top column 28. The first bag opening plate 21 is rotatably connected to the support plate 1. The first suction cup 22 is provided on the first bag opening plate 21 and is located on the left side of the first bag opening plate 21. The first bag opening cylinder 23 is provided on the first bag opening plate 21. The first bag opening cylinder 23 is connected to the first bag opening seat 24 and can drive the first bag opening seat 24 to move up and down. The first clamping claw 25 is connected to the first rotating shaft 26. The first clamping member 27 and the first top column 28 are provided on the first bag opening plate 21. The shaft 26 is rotatably connected to the first bag opening seat 24, the first clamping jaw 25 has a first abutting end 251 and a first clamping end 252, the first clamping jaw 25 is bent, the first abutting end 251 is located on the right side of the first rotating shaft 26, the first clamping end 252 is located at the lower left of the first rotating shaft 26, the first clamping member 27 is provided on the first bag opening plate 21 and is located on the right side of the first clamping end 252, the first top column 28 is provided on the first bag opening plate 21 and is located on the lower side of the first abutting end 251, and the first top column 28 is used to drive the first clamping end 252 close to the first clamping member 27.

[0037] Further, the second bag opening mechanism 3 is arranged on the left side of the first bag opening mechanism 2, and the second bag opening mechanism 3 includes a second bag opening plate 31, a second suction cup 32, a second bag opening cylinder 33, a second bag opening seat 34, a second clamping claw 35, a second rotating shaft 36, a second clamping member 37 and a second top column 38. The second bag opening plate 31 is rotatably connected to the support plate 1, the second suction cup 32 is arranged on the second bag opening plate 31 and is located on the right side of the second bag opening plate 31, the second bag opening cylinder 33 is arranged on the second bag opening plate 31, and the second bag opening cylinder 33 is connected to the second bag opening seat 34 and can drive the second bag opening seat 34 to move up and down. The second clamping jaw 35 is rotatably connected to the second bag opening seat 34 through the second rotating shaft 36. The second clamping jaw 35 has a second abutting end 351 and a second clamping end 352. The second clamping jaw 35 is bent. The second abutting end 351 is located on the left side of the second rotating shaft 36, and the second clamping end 352 is located at the lower right side of the second rotating shaft 36. The second clamping member 37 is provided on the second bag opening plate 31 and is located on the left side of the second clamping end 352. The second top column 38 is provided on the second bag opening plate 31 and is located on the lower side of the second abutting end 351. The second top column 38 is used to drive the second clamping end 352 close to the second clamping member 37.

[0038] Furthermore, the linkage mechanism 4 includes a linkage linear drive unit 41 and two linkage gears 42, the two linkage gears 42 are meshed with each other, one of the linkage gears 42 is connected to the first bag opening plate 21, and the other linkage gear 42 is connected to the second bag opening plate 31, the linkage linear drive unit 41 is arranged on the support plate 1, and the linkage linear drive unit 41 is connected to the first bag opening plate 21 to drive the first bag opening plate 21 to rotate around the axis of one of the linkage gears 42.

[0039] In the utility model, the linkage mechanism 4 is used to drive the first bag opening mechanism 2 and the second bag opening mechanism 3 to move closer to or away from each other, thereby realizing the bag opening operation, with higher bag opening efficiency and better bag opening effect.

[0040] When opening the bag, the linkage linear drive unit 41 drives the first bag opening plate 21 to rotate. When the first bag opening plate 21 rotates, the engagement between the two linkage gears 42 can drive the second bag opening plate 31 to rotate in the opposite direction, that is, the first suction cup 22 and the second suction cup 32 can be driven to approach each other to clamp the packaging bag, and the first suction cup 22 and the second suction cup 32 can be driven away from each other to open the bag opening of the packaging bag. The first suction cup 22 and the second suction cup 32 mainly play the most basic role of adsorbing the bag opening, thereby ensuring the most basic bag opening effect.

[0041] In order to improve the bag opening effect, the utility model adopts the first clamping jaw 25 and the second clamping jaw 35 to strengthen the clamping force on the bag opening. Specifically, the first bag opening cylinder 23 is used to drive the first bag opening seat 24 to drive the first clamping jaw 25 to move downward. When the first clamping jaw 25 moves downward to the first top column 28, the first top column 28 can relatively push the first abutting end 251 to move upward, that is, the entire first clamping jaw 25 will rotate counterclockwise. According to the lever principle, the first clamping end 252 will move rightward to the first clamping piece 27, so that the bag opening of the packaging bag is clamped between the first clamping end 252 and the first clamping piece 27. Similarly, The second clamping end 352 and the second clamping member 37 can clamp the left side of the bag opening of the packaging bag, and then the linkage mechanism 4 is used to drive the first bag opening plate 21 and the second bag opening plate 31 to move away from each other, that is, the first bag opening plate 21 rotates counterclockwise and the second bag opening plate 31 rotates clockwise, so as to open the bag opening of the packaging bag. Compared with the existing bag opening method that only relies on suction cup adsorption, the utility model can clamp the bag opening more stably, improve the bag opening effect, ensure that each packaging bag can be successfully opened, and have a better bag opening effect, avoiding bag opening failure and re-opening, which can effectively improve the work efficiency of the entire bag opening process.

[0042] In some embodiments, the first bag opening mechanism 2 also includes a first spring 29, one end of the first spring 29 is connected to the first clamping jaw 25, and the other end of the first spring 29 is connected to the first bag opening seat 24. The first spring 29 is used to drive the first clamping end 252 away from the first clamping member 27. Specifically, after opening a packaging bag, the bag opening device needs to open another packaging bag. By setting the first spring 29, the first clamping end 252 can maintain a trend away from the first clamping member 27. The first bag opening cylinder 23 drives the first bag opening seat 24 to move upward, and the first abutment end 251 will leave the first top column 28. At this time, the first clamping jaw 25 will rotate clockwise under the action of the first spring 29, and the first clamping end 252 will move away from the first clamping member 27, thereby releasing the packaging bag, and then clamping the next packaging bag. The first clamping jaw 25 is reset by adopting the first spring 29, which has a simple structure and low cost.

[0043] In some embodiments, the second bag opening mechanism 3 also includes a second spring 39, one end of the second spring 39 is connected to the second clamping jaw 35, and the other end of the second spring 39 is connected to the second bag opening seat 34. The second spring 39 is used to drive the second clamping end 352 away from the second clamping member 37. Specifically, after opening a packaging bag, the bag opening device needs to open another packaging bag. By setting the second spring 39, the second clamping end 352 can maintain a tendency to move away from the second clamping member 37. The second bag opening cylinder 33 drives the second bag opening seat 34 to move upward, and the second abutting end 351 will leave the second top column 38. At this time, the second clamping jaw 35 will rotate counterclockwise under the action of the second spring 39, and the second clamping end 352 will move away from the second clamping member 37, thereby releasing the packaging bag, and then clamping the next packaging bag. The second clamping jaw 35 is reset by adopting the second spring 39, which has a simple structure and low cost.

[0044] In some embodiments, the first clamping member 27 and the second clamping member 37 are both made of silicone, which can prevent damage to the packaging bag and have a certain degree of deformation ability, so that they can better fit the packaging bag and have a better clamping effect.

[0045] In some embodiments, the first bag opening mechanism 2 also includes a first guide column 210, which is vertically arranged on the first bag opening plate 21, and the first bag opening seat 24 is slidably connected to the first guide column 210. By setting the first guide column 210, the movement of the first bag opening seat 24 can be made smoother, and the first clamp 25 can be more accurately inserted into the bag opening of the packaging bag.

[0046] In some embodiments, the second bag opening mechanism 3 also includes a second guide column 310, which is vertically arranged on the second bag opening plate 31, and the second bag opening seat 34 is slidably connected to the second guide column 310. By setting the second guide column 310, the movement of the second bag opening seat 34 can be made smoother, and the second clamp 35 can be more accurately inserted into the bag opening of the packaging bag.

[0047] In some embodiments, the first bag opening mechanism 2 also includes a first pad 211 and a first clamp 212. The first pad 211 is connected to the first bag opening plate 21, and the first clamp 212 is arranged on the first pad 211. By setting the first pad 211 and the first clamp 212, the packaging bag can be clamped more smoothly, and the first suction cup 22 can more conveniently absorb the packaging bag. The first clamp 25 can also be inserted into the bag mouth of the packaging bag more accurately.

[0048] In some embodiments, the second bag opening mechanism 3 also includes a second pad 311 and a second clamp 312. The second pad 311 is connected to the second bag opening plate 31, and the second clamp 312 is arranged on the second pad 311. By setting the second pad 311 and the second clamp 312, the packaging bag can be clamped more smoothly, and the second suction cup 32 can more conveniently absorb the packaging bag. The second clamp 35 can also be inserted into the bag mouth of the packaging bag more accurately.

[0049] In some embodiments, the first clamping end 252 and the second clamping end 352 are both wedge-shaped structures, which can be inserted into the bag opening of the packaging bag more quickly.

[0050] In some embodiments, the linkage mechanism 4 also includes two linkage shafts 43, the first bag opening plate 21 is connected to one of the linkage gears 42 through one of the linkage shafts 43, and the second bag opening plate 31 is connected to the other linkage gear 42 through the other linkage shaft 43. Specifically, when the first bag opening plate 21 rotates counterclockwise, one of the linkage shafts 43 drives one of the linkage gears 42 to rotate counterclockwise, and the counterclockwise rotation of one of the linkage gears 42 will drive the other linkage gear 42 to rotate clockwise, and then drive the other linkage shaft 43 to rotate clockwise, thereby driving the second bag opening plate 31 to rotate clockwise, and the first bag opening plate 21 and the second bag opening plate 31 will form an open posture, thereby pulling open the bag mouth of the packaging bag. Such a linkage mechanism 4 is used to open the bag mouth of the packaging bag, which has a simple structure, low cost and high work efficiency.

[0051] In some embodiments, the linkage mechanism 4 also includes a bag opening linkage shaft 44, and the linkage linear drive unit 41 includes a first linkage cylinder 411 and a second linkage cylinder 412. The fixed end of the first linkage cylinder 411 is connected to the fixed end of the second linkage cylinder 412, and the movable end of the first linkage cylinder 411 is rotatably connected to one end of the bag opening linkage shaft 44 through a fisheye bearing, and the other end of the bag opening linkage shaft 44 is connected to the first bag opening plate 21, and the movable end of the second linkage cylinder 412 is rotatably connected to the support plate 1 through a fisheye bearing.

[0052] Specifically, when the bag opening of the packaging bag is opened, the first clamping pad 212 and the second clamping pad 312 clamp the bag opening of the packaging bag, the first suction cup 22 and the second suction cup 32 adsorb the bag opening of the packaging bag, and then the first linkage cylinder 411 is started first, the first linkage cylinder 411 can drive the first bag opening plate 21 and the second bag opening plate 31 to rotate, so that a small gap can be formed at the bag opening of the packaging bag, and then the first bag opening cylinder 23 and the second bag opening cylinder 33 respectively drive the first clamping jaw 25 and the second clamping jaw 35 to move down and insert into the gap and open the bag. Clamp the bag opening of the packaging bag, and then start the second linkage cylinder 412. The second linkage cylinder 412 can drive the first bag opening plate 21 and the second bag opening plate 31 to continue to rotate, so that the bag opening of the packaging bag can be completely opened. The bag opening of the packaging bag is opened in a two-stage manner to ensure that the first clamping jaw 25 and the second clamping jaw 35 can enter the gap in the bag opening of the packaging bag, thereby ensuring that the first clamping jaw 25 and the second clamping jaw 35 can respectively clamp the two sides of the bag opening of the packaging bag, thereby achieving a better bag opening effect, a higher bag opening success rate, and a higher bag opening efficiency.

[0053] In some embodiments, the bag opening device also includes a steering mechanism 5, which is connected to the support plate 1 to drive the support plate 1 to switch between a horizontal state and a vertical state, so that the horizontally placed packaging bag can be adjusted to a vertical state, facilitating subsequent loading work and further improving work efficiency.

[0054] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A bag opening device, characterized in that: include: Support plate (1); A first bag opening mechanism (2), the first bag opening mechanism (2) comprising a first bag opening plate (21), a first suction cup (22), a first bag opening cylinder (23), a first bag opening seat (24), a first clamping claw (25), a first rotating shaft (26), a first clamping member (27) and a first top column (28), the first bag opening plate (21) being rotatably connected to the support plate (1), the first suction cup (22) being arranged on the first bag opening plate (21), the first bag opening cylinder (23) being arranged on the first bag opening plate (21), and the first bag opening cylinder (23) and the first top column (28) being connected to each other. The first bag opening plate (21) is connected to a bag opening seat (24), the first clamping claw (25) is rotatably connected to the first bag opening seat (24) through the first rotating shaft (26), the first clamping claw (25) has a first abutting end (251) and a first clamping end (252), the first clamping piece (27) is arranged on the first bag opening plate (21), the first top column (28) is arranged on the first bag opening plate (21) and is located at the lower side of the first abutting end (251), and the first top column (28) is used to drive the first clamping end (252) to approach the first clamping piece (27); A second bag opening mechanism (3), the second bag opening mechanism (3) is arranged on one side of the first bag opening mechanism (2), the second bag opening mechanism (3) comprises a second bag opening plate (31), a second suction cup (32), a second bag opening cylinder (33), a second bag opening seat (34), a second clamping claw (35), a second rotating shaft (36), a second clamping member (37) and a second top column (38), the second bag opening plate (31) is rotatably connected to the support plate (1), the second suction cup (32) is arranged on the second bag opening plate (31), the second bag opening cylinder (33) is arranged on the second bag opening plate (31), the The second bag opening cylinder (33) is connected to the second bag opening seat (34); the second clamping claw (35) is rotatably connected to the second bag opening seat (34) via the second rotating shaft (36); the second clamping claw (35) has a second abutting end (351) and a second clamping end (352); the second clamping member (37) is provided on the second bag opening plate (31); the second top column (38) is provided on the second bag opening plate (31) and is located at the lower side of the second abutting end (351); the second top column (38) is used to drive the second clamping end (352) to approach the second clamping member (37); A linkage mechanism (4), the linkage mechanism (4) comprising a linkage linear drive unit (41) and two linkage gears (42), the two linkage gears (42) meshing with each other, one of the linkage gears (42) being connected to the first bag opening plate (21), and the other linkage gear (42) being connected to the second bag opening plate (31), the linkage linear drive unit (41) being arranged on the support plate (1), the linkage linear drive unit (41) being connected to the first bag opening plate (21) so as to drive the first bag opening plate (21) to rotate around the axis of one of the linkage gears (42).

2. The bag opening device according to claim 1, characterized in that: The first bag opening mechanism (2) further comprises a first spring (29), one end of the first spring (29) being connected to the first clamping claw (25), and the other end of the first spring (29) being connected to the first bag opening seat (24), and the first spring (29) being used for driving the first clamping end (252) away from the first clamping member (27).

3. The bag opening device according to claim 1, characterized in that: The second bag opening mechanism (3) also includes a second spring (39), one end of the second spring (39) is connected to the second clamping claw (35), and the other end of the second spring (39) is connected to the second bag opening seat (34), and the second spring (39) is used to drive the second clamping end (352) away from the second clamping member (37).

4. The bag opening device according to claim 1, characterized in that: The first bag opening mechanism (2) further comprises a first guide column (210), wherein the first guide column (210) is vertically arranged on the first bag opening plate (21), and the first bag opening seat (24) is slidably connected to the first guide column (210).

5. The bag opening device according to claim 1, characterized in that: The second bag opening mechanism (3) further comprises a second guide column (310), wherein the second guide column (310) is vertically arranged on the second bag opening plate (31), and the second bag opening seat (34) is slidably connected to the second guide column (310).

6. The bag opening device according to claim 1, characterized in that: The first bag opening mechanism (2) further comprises a first pad (211) and a first clamping pad (212); the first pad (211) is connected to the first bag opening plate (21); and the first clamping pad (212) is arranged on the first pad (211).

7. The bag opening device according to claim 1, characterized in that: The second bag opening mechanism (3) further comprises a second pad (311) and a second clamping pad (312); the second pad (311) is connected to the second bag opening plate (31); and the second clamping pad (312) is arranged on the second pad (311).

8. The bag opening device according to claim 1, characterized in that: The first clamping end (252) and the second clamping end (352) are both wedge-shaped structures.

9. The bag opening device according to claim 1, characterized in that: The linkage mechanism (4) further comprises two linkage rotating shafts (43), the first bag opening plate (21) being connected to one of the linkage gears (42) via one of the linkage rotating shafts (43), and the second bag opening plate (31) being connected to the other linkage gear (42) via the other linkage rotating shaft (43).

10. The bag opening device according to claim 1, characterized in that: The linkage mechanism (4) further comprises a bag opening linkage shaft (44); the linkage linear drive unit (41) comprises a first linkage cylinder (411) and a second linkage cylinder (412); the fixed end of the first linkage cylinder (411) is connected to the fixed end of the second linkage cylinder (412); the movable end of the first linkage cylinder (411) is rotatably connected to one end of the bag opening linkage shaft (44) via a fisheye bearing; the other end of the bag opening linkage shaft (44) is connected to the first bag opening plate (21); and the movable end of the second linkage cylinder (412) is rotatably connected to the support plate (1) via a fisheye bearing.

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