Packaging bag sealing device and packaging machine

Abstract

The present invention relates to the technical field of packaging machine equipment, and specifically to a packaging bag sealing device and a packaging machine, wherein the packaging bag sealing device comprises a sealing assembly, a connecting assembly, a first driving assembly and a second driving assembly; the sealing assembly comprises a first movable jaw and a second movable jaw; the first driving assembly comprises a driving member and a first connecting plate, and the driving member abuts against the first connecting plate; the first connecting plate is rotatably connected to one end of the connecting assembly, and the other end of the connecting assembly is rotatably connected to the sealing assembly; the driving member can drive the first movable jaw and the second movable jaw to perform a closing movement; the second driving assembly comprises an adjusting rod and a second elastic member; the second elastic member is connected to the first connecting plate, and the second elastic member drives the first movable jaw and the second movable jaw to perform an opening or closing movement; the present invention effectively realizes bidirectional heating and bidirectional clamping of a sealing film by arranging a first movable jaw and a second movable jaw that can be heated, in cooperation with the first driving assembly and the second driving assembly, and has a simple structure and ensures a longitudinal sealing effect.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging machine equipment, and in particular to a packaging bag sealing device and a packaging machine. Background Art

[0002] At present, the longitudinal sealing used on most automatic packaging equipment is one-way hot-melt pressing and single-action clamping. However, the disadvantage of the hot-melt pressing method is that the heating body also transfers heat to the bag-making forming tube during the pressing process. The film is pressed against the forming tube by the heating body to seal. In particular, the contact area of ​​the forming tube of small strip bags is small, which is not suitable for sealing multi-row strip bags. Moreover, the adjustment of the single-action clamping is very difficult, and the sealing effect is not ideal due to the single-action unidirectional heating, which leads to poor packaging appearance and affects the market sales of the product.

[0003] Based on the shortcomings of the prior art, it is urgent to study a packaging bag sealing device and a packaging machine to solve the above problems. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a packaging bag sealing device and a packaging machine. The present invention effectively realizes bidirectional heating and bidirectional clamping of the sealing film by arranging the first movable clamp and the second movable clamp that can be heated, and cooperates with the first driving assembly and the second driving assembly. The device has a simple structure, simple operation, easy maintenance, and ensures a longitudinal sealing effect.

[0005] The present invention discloses a packaging bag sealing device, comprising a sealing component, a connecting component, a first driving component and a second driving component;

[0006] The sealing assembly is used to clamp and seal the packaging bag, and the sealing assembly includes a first movable clamp and a second movable clamp;

[0007] The first driving assembly comprises a driving member and a first connecting plate, the driving member abuts against the first connecting plate; the first connecting plate is rotatably connected to one end of the connecting assembly, and the other end of the connecting assembly is rotatably connected to the sealing assembly; the driving member can drive the first connecting plate to move, so that the connecting assembly drives the first movable jaw and the second movable jaw to perform a closing movement;

[0008] The second driving assembly includes an adjusting rod and a second elastic member; the second elastic member is connected to the first connecting plate, the adjusting rod is used to stretch the second elastic member, and the second elastic member can drive the first connecting plate to move, so that the connecting assembly drives the first movable clamp and the second movable clamp to open or close.

[0009] Further, the second driving assembly further includes a second connecting plate, a first connecting rod and a third connecting plate;

[0010] The adjusting rod is connected to one side of the second connecting plate, the other side of the second connecting plate is connected to one end of the first connecting rod, the other end of the first connecting rod is connected to the third connecting plate, and the third connecting plate and the first connecting plate are connected via the second elastic member.

[0011] Furthermore, a first heater is disposed in the second movable jaw, and a second heater is disposed in the first movable jaw.

[0012] Further, the connecting assembly includes a second connecting rod and a third connecting rod;

[0013] One end of the second connecting rod is connected to the first connecting plate, and the other end of the second connecting rod is connected to the second movable pliers; one end of the third connecting rod is connected to the first connecting plate, and the other end of the third connecting rod is connected to the first movable pliers.

[0014] Further, the connection assembly includes a first joint, a second joint, a third joint and a fourth joint;

[0015] One end of the first joint is rotatably connected to the first connecting plate, and the other end of the first joint is connected to the second connecting rod; one end of the second joint is connected to the second connecting rod, and the other end of the second joint is rotatably connected to the second movable clamp;

[0016] One end of the third joint is rotatably connected to the first connecting plate, and the other end of the third joint is connected to the third connecting rod; one end of the fourth joint is connected to the third connecting rod, and the other end of the fourth joint is rotatably connected to the first movable pliers.

[0017] Furthermore, it also includes a frame assembly, the frame assembly includes a first fixing plate, a second fixing plate, a third fixing plate and a fourth fixing plate;

[0018] The first fixing plate, the second fixing plate, the third fixing plate and the fourth fixing plate are connected to form a square frame, and the third fixing plate and the fourth fixing plate are arranged opposite to each other;

[0019] The third fixing plate is provided with a first opening, and one end of the first connecting plate can move in the first opening;

[0020] The fourth fixing plate is provided with a second opening, and the other end of the first connecting plate can move in the second opening; wherein the positions of the first opening and the second opening correspond one to one.

[0021] Furthermore, the first driving assembly further comprises a first elastic member, one end of the first elastic member abuts against the first connecting plate, and the other end of the first elastic member abuts against the first fixing plate;

[0022] The second connecting rod is arranged on one side of the frame assembly, the third connecting rod is arranged on the other side of the frame assembly, and the first elastic member, the first connecting plate, the second connecting plate and the third connecting plate are all arranged in the frame assembly.

[0023] Furthermore, it also includes a fixed bracket, a bracket connecting piece, a first rotating bracket and a second rotating bracket; the bracket connecting piece is connected to the fixed bracket, and the first rotating bracket and the second rotating bracket are both connected to the bracket connecting piece;

[0024] One end of the first rotating bracket is connected to the second connecting rod through a first rotating shaft, and the other end of the first rotating bracket is connected to the bracket connecting piece; the second rotating bracket is connected to the third connecting rod through a second rotating shaft, and the other end of the second rotating bracket is connected to the bracket connecting piece.

[0025] Furthermore, the driving member is a cylinder, and the driving member is arranged on the bracket connecting member.

[0026] Another aspect of the present invention protects a packaging machine, including a frame, a film supply device and the packaging bag sealing device as described above, wherein the film supply device and the packaging bag sealing device are both arranged on the frame, and the film supply device is connected to the packaging bag sealing device.

[0027] Implementing the embodiments of the present invention has the following beneficial effects:

[0028] 1. The present invention provides the first movable jaw and the second movable jaw that can be heated, and cooperates with the first driving assembly and the second driving assembly to effectively realize bidirectional heating and bidirectional clamping of the sealing film. It has a simple structure, simple operation, easy maintenance, and ensures a longitudinal sealing effect.

[0029] 2. The present invention adjusts the second driving component and the heater so that the sealing pressure can be finely adjusted and matched with fine temperature control to meet the bagging requirements of films of different thicknesses. It is suitable for bag-making films of different thicknesses and various vertical and multi-row packaging machines. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments or prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0031] Figure 1 It is an isometric view of the packaging bag sealing device according to this embodiment;

[0032] Figure 2 It is a top view of the packaging bag sealing device described in this embodiment.

[0033] Among them, the reference numerals in the figure correspond to:

[0034] 1-sealing assembly; 2-connecting assembly; 3-first driving assembly; 4-second driving assembly; 5-frame assembly; 6-fixed bracket; 7-bracket connecting piece; 8-first rotating bracket; 9-second rotating bracket; 11-first movable clamp; 12-second movable clamp; 21-second connecting rod; 22-third connecting rod; 23-first joint; 24-second joint; 25-third joint; 26-fourth joint; 31-driving piece; 32-first connecting plate; 33-first elastic piece; 41-adjusting rod; 42-second connecting plate; 43-first connecting rod; 44-third connecting plate; 45-second elastic piece; 46-screw; 47-scale display piece; 51-first fixed plate; 52-second fixed plate; 53-third fixed plate; 54-fourth fixed plate; 55-second opening. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0037] The prior art has the following disadvantages: the longitudinal sealing used on the existing automatic packaging equipment is a single-action clamp, which is very difficult to adjust. During adjustment, since one end of the longitudinal sealing device is fixed and the other end is movable, it is easy to interfere with the packaging machine during adjustment, and it is easy to damage the film to be sealed on the packaging equipment; and since the single-action clamp is generally heated in one direction, the sealing effect is not very ideal.

[0038] In view of the defects of the prior art, the present invention provides the first movable clamp and the second movable clamp that can be heated, and cooperates with the first drive assembly and the second drive assembly to effectively realize the bidirectional heating and bidirectional clamping of the sealing film. The structure is simple, the operation is simple, the maintenance is easy, and the longitudinal sealing effect is guaranteed; and by adjusting the second drive assembly and the heater, the sealing pressure can be finely adjusted in combination with fine temperature control to meet the bagging of films of different thicknesses, and is suitable for bag-making films of different thicknesses and various vertical and multi-row packaging machines.

[0039] Example 1

[0040] See attached Figure 1-2 , this embodiment provides a packaging bag sealing device, including a sealing component 1, a connecting component 2, a first driving component 3 and a second driving component 4;

[0041] The sealing assembly 1 is used to clamp and seal the packaging bag, and the sealing assembly 1 includes a first movable clamp 11 and a second movable clamp 12;

[0042] The first driving assembly 3 includes a driving member 31 and a first connecting plate 32, wherein the driving member 31 abuts against the first connecting plate 32; the first connecting plate 32 is rotatably connected to one end of the connecting assembly 2, and the other end of the connecting assembly 2 is rotatably connected to the sealing assembly 1; the driving member 31 can drive the first connecting plate 32 to move, so that the connecting assembly 2 drives the first movable jaw 11 and the second movable jaw 12 to perform a closing movement;

[0043] The second driving component 4 includes an adjusting rod 41 and a second elastic member 45; the second elastic member 45 is connected to the first connecting plate 32, and the adjusting rod 41 is used to stretch the second elastic member 45. The second elastic member 45 can drive the first connecting plate 32 to move, so that the connecting component 2 drives the first movable clamp 11 and the second movable clamp 12 to open or close.

[0044] It should be noted that the packaging bag sealing device of this embodiment effectively realizes bidirectional heating and bidirectional clamping of the sealing film by providing the first movable jaw and the second movable jaw that can be heated, and cooperating with the first driving assembly and the second driving assembly. It has a simple structure, simple operation, easy maintenance, and ensures a longitudinal sealing effect.

[0045] Preferably, the second driving assembly 4 further includes a second connecting plate 42, a first connecting rod 43 and a third connecting plate 44;

[0046] The adjusting rod 41 is connected to one side of the second connecting plate 42, the other side of the second connecting plate 42 is connected to one end of the first connecting rod 43, the other end of the first connecting rod 43 is connected to the third connecting plate 44, and the third connecting plate 44 and the first connecting plate 32 are connected via the second elastic member 45; by adjusting the second driving assembly and the heater, the sealing pressure can be finely adjusted and coordinated with fine temperature control to meet the bagging of films of different thicknesses, and is suitable for bag-making films of different thicknesses and various vertical and multi-row packaging machines.

[0047] Specifically, the rotation of the adjusting rod 41 can drive the second connecting plate 42 to move toward the driving member 31, and the second connecting plate 42 drives the third connecting plate 44 to move toward the driving member 31 through the first connecting rod 43; at this time, the second elastic member 45 is stretched, so the second elastic member 45 drives the first connecting plate 32 to move toward the driving member 31.

[0048] Preferably, a first heater is disposed in the second movable jaw 12 , and a second heater is disposed in the first movable jaw 11 .

[0049] Specifically, the connecting assembly 2 can drive the first movable jaw 11 and the second movable jaw 12 to open or close, and the first movable jaw 11 and the second movable jaw 12 are both provided with heaters to ensure the sealing effect and efficiency of the packaging film.

[0050] Specifically, the first movable jaw 11 includes a first heating surface, and the second movable jaw 12 includes a second heating surface. When the first movable jaw 11 and the second movable jaw 12 are driven by the connecting component 2 to perform a closing movement, the first heating surface and the second heating surface are abutted against each other; when the first movable jaw 11 and the second movable jaw 12 change from closed to open, the first heating surface and the second heating surface are separated.

[0051] Specifically, the first movable jaw 11 and the second movable jaw 12 are both provided with a temperature sensor for detecting temperature.

[0052] Preferably, the connecting assembly 2 comprises a second connecting rod 21 and a third connecting rod 22;

[0053] One end of the second connecting rod 21 is connected to the first connecting plate 32 , and the other end of the second connecting rod 21 is connected to the second movable clamp 12 ; one end of the third connecting rod 22 is connected to the first connecting plate 32 , and the other end of the third connecting rod 22 is connected to the first movable clamp 11 .

[0054] Specifically, the second connecting rod 21 can pull the second movable pliers 12 to rotate, and the third connecting rod 22 can pull the first movable pliers 11 to rotate.

[0055] Preferably, the connection assembly 2 includes a first joint 23, a second joint 24, a third joint 25 and a fourth joint 26;

[0056] One end of the first joint 23 is rotatably connected to the first connecting plate 32, and the other end of the first joint 23 is connected to the second connecting rod 21; one end of the second joint 24 is connected to the second connecting rod 21, and the other end of the second joint 24 is rotatably connected to the second movable clamp 12;

[0057] One end of the third joint 25 is rotatably connected to the first connecting plate 32 , and the other end of the third joint 25 is connected to the third connecting rod 22 ; one end of the fourth joint 26 is connected to the third connecting rod 22 , and the other end of the fourth joint 26 is rotatably connected to the first movable clamp 11 .

[0058] Specifically, the second movable clamp 12 is fixed on the first rotating bracket 8 , and the second joint 24 is rotatably connected to the first rotating bracket 8 ; the first movable clamp 11 is fixed on the second rotating bracket 9 , and the fourth joint 26 is rotatably connected to the second rotating bracket 9 .

[0059] Preferably, it further comprises a frame assembly 5, wherein the frame assembly 5 comprises a first fixing plate 51, a second fixing plate 52, a third fixing plate 53 and a fourth fixing plate 54;

[0060] The first fixing plate 51, the second fixing plate 52, the third fixing plate 53 and the fourth fixing plate 54 are connected to form a square frame, and the third fixing plate 53 and the fourth fixing plate 54 are arranged opposite to each other;

[0061] The third fixing plate 53 is provided with a first opening, and one end of the first connecting plate 32 can move in the first opening;

[0062] The fourth fixing plate 54 is provided with a second opening 55 , and the other end of the first connecting plate 32 can move in the second opening 55 ; wherein the positions of the first opening and the second opening 55 correspond one to one.

[0063] Specifically, the first fixing plate 51 and the second fixing plate 52 are arranged opposite to each other, and a third opening is provided on the first fixing plate 51, and the driving member 31 passes through the third opening to abut against the first connecting plate 32; a fourth opening is provided on the second fixing plate 52, and the adjusting rod 41 passes through the fourth opening to be connected with the second connecting plate 42; wherein the positions of the third opening and the fourth opening correspond one to one.

[0064] Preferably, the first driving assembly 3 further includes a first elastic member 33, one end of the first elastic member 33 abuts against the first connecting plate 32, and the other end of the first elastic member 33 abuts against the first fixing plate 51;

[0065] The second connecting rod 21 is arranged on one side of the frame assembly 5, the third connecting rod 22 is arranged on the other side of the frame assembly 5, and the first elastic member 33, the first connecting plate 32, the second connecting plate 42 and the third connecting plate 44 are all arranged in the frame assembly 5.

[0066] Specifically, two ends of the first connecting plate 32 connected to the connecting assembly 2 extend out from the first opening and the second opening 55 respectively, and the first connecting plate 32 moves along the length direction of the first opening or the second opening 55 driven by the connecting assembly 2 .

[0067] Specifically, the first elastic member 33 is a compression spring, and the second elastic member 45 is a tension spring.

[0068] Preferably, it further comprises a fixed bracket 6, a bracket connector 7, a first rotating bracket 8 and a second rotating bracket 9; the bracket connector 7 is connected to the fixed bracket 6, and the first rotating bracket 8 and the second rotating bracket 9 are both connected to the bracket connector 7;

[0069] One end of the first rotating bracket 8 is connected to the second connecting rod 21 through a first rotating shaft, and the other end of the first rotating bracket 8 is connected to the bracket connecting piece 7; the second rotating bracket 9 is connected to the third connecting rod 22 through a second rotating shaft, and the other end of the second rotating bracket 9 is connected to the bracket connecting piece 7.

[0070] Specifically, the bracket connecting member 7 is provided with a third rotating shaft and a fourth rotating shaft, the first rotating bracket 8 is rotatably connected to the bracket connecting member 7 via the third rotating shaft, and the second rotating bracket 9 is rotatably connected to the bracket connecting member 7 via the fourth rotating shaft; that is, the first movable clamp 11 can rotate around the fourth rotating shaft, and the second movable clamp 12 can rotate around the third rotating shaft.

[0071] Preferably, the driving member 31 is a cylinder, and the driving member 31 is arranged on the bracket connecting member 7 .

[0072] Specifically, the piston rod of the cylinder abuts against the first connecting plate 32 .

[0073] Specifically, the second drive assembly 4 also includes a lead screw 46 and a scale display 47; one end of the lead screw 46 is connected to the adjusting rod 41, and the other end of the lead screw 46 is connected to the second connecting plate 42; the scale display 47 is connected to the adjusting rod 41, and the scale display 47 is used to display the adjusted length of the adjusting rod 41.

[0074] The working process of the packaging bag sealing device is as follows: when the first movable jaw 11 and the second movable jaw 12 need to be opened, the piston rod of the cylinder is controlled to extend, and the first connecting plate 32 is pushed to move along the axis direction of the piston rod; the first connecting plate 32 pulls the first movable jaw 11 and the second movable jaw 12 to open through the second connecting rod 21 and the third connecting rod 22;

[0075] When the first movable pliers 11 and the second movable pliers 12 need to move from an open state to a closed state, the adjusting rod 41 is adjusted so that the adjusting rod 41 pushes the second connecting plate 42 to move toward the side of the driving member 31; the second connecting plate 42 drives the third connecting plate 44 to move toward the side of the driving member 31 through the first connecting rod 43; at this time, the second elastic member 45 is stretched, so the second elastic member 45 drives the first connecting plate 32 to move toward the side of the driving member 31; the second connecting rod 21 and the third connecting rod 22 push the first movable pliers 11 and the second movable pliers 12 to close.

[0076] On the other hand, the present invention protects a packaging machine, including a frame, a film supply device and the packaging bag sealing device as described above, wherein the film supply device and the packaging bag sealing device are both arranged on the frame, and the film supply device is connected to the packaging bag sealing device; when the packaging bag sealing device is installed, it is not easy to interfere with the packaging machine, so it is not easy to damage the film to be sealed.

[0077] Specifically, the packaging machine further includes a controller, which is electrically connected to a temperature sensor, and the controller can adjust the temperature of the heater on the first movable jaw 11 and / or the second movable jaw 12 according to the temperature detected by the temperature sensor.

[0078] Example 2

[0079] The main difference between this embodiment and embodiment 1 is that: in embodiment 1, a first drive component 3 and a second drive component 4 are provided to drive the first movable jaw 11 and the second movable jaw 12 to open or close; while this embodiment only includes the first drive component 3, and the first drive component 3 is used to drive the first movable jaw 11 and the second movable jaw 12 to open or close; other technical features of this embodiment are the same as those of embodiment 1 and will not be described here.

[0080] See attached Figure 1-2 , this embodiment provides a packaging bag sealing device, including a sealing component 1, a connecting component 2 and a first driving component 3;

[0081] The sealing assembly 1 is used to clamp and seal the packaging bag, and the sealing assembly 1 includes a first movable clamp 11 and a second movable clamp 12;

[0082] The first driving component 3 includes a driving member 31 and a first connecting plate 32, and the driving member 31 is abutted against the first connecting plate 32; the first connecting plate 32 is rotatably connected to one end of the connecting component 2, and the other end of the connecting component 2 is rotatably connected to the sealing component 1; the driving member 31 can drive the first connecting plate 32 to move back and forth, so that the connecting component 2 drives the first movable clamp 11 and the second movable clamp 12 to open or close.

[0083] Specifically, the piston rod of the cylinder is connected to the first connecting plate 32 , so that the cylinder can drive the first connecting plate 32 to move back and forth along the axis direction of the piston rod, thereby realizing the opening or closing movement of the first movable pliers 11 and the second movable pliers 12 .

[0084] Although the present invention has been described through preferred embodiments, the present invention is not limited to the embodiments described herein but includes various changes and modifications that may be made without departing from the scope of the present invention.

[0085] In this document, the directional words such as front, back, top, and bottom are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in this application.

[0086] In the absence of conflict, the above embodiments and features in the embodiments can be combined with each other.

[0087] The above disclosure is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A packaging bag sealing device, It is characterized in that It comprises a sealing component (1), a connecting component (2), a first driving component (3), a second driving component (4) and a frame component (5); The sealing assembly (1) is used for clamping and sealing a packaging bag, and the sealing assembly (1) comprises a first movable clamp (11) and a second movable clamp (12); The first driving component (3) comprises a driving member (31) and a first connecting plate (32), wherein the driving member (31) is in abutment with the first connecting plate (32); the first connecting plate (32) is rotatably connected to one end of the connecting component (2), and the other end of the connecting component (2) is rotatably connected to the sealing component (1); the driving member (31) is capable of driving the first connecting plate (32) to move, so that the connecting component (2) drives the first movable jaw (11) and the second movable jaw (12) to perform a closing movement; The second driving assembly (4) comprises an adjusting rod (41) and a second elastic member (45); the second elastic member (45) is connected to the first connecting plate (32); the adjusting rod (41) is used to stretch the second elastic member (45); the second elastic member (45) can drive the first connecting plate (32) to move, so that the connecting assembly (2) drives the first movable jaw (11) and the second movable jaw (12) to open or close; The connecting assembly (2) comprises a second connecting rod (21), a third connecting rod (22), a first joint (23), a second joint (24), a third joint (25) and a fourth joint (26); One end of the second connecting rod (21) is connected to the first connecting plate (32), and the other end of the second connecting rod (21) is connected to the second movable jaw (12); one end of the third connecting rod (22) is connected to the first connecting plate (32), and the other end of the third connecting rod (22) is connected to the first movable jaw (11); One end of the first joint (23) is rotatably connected to the first connecting plate (32), and the other end of the first joint (23) is connected to the second connecting rod (21); one end of the second joint (24) is connected to the second connecting rod (21), and the other end of the second joint (24) is rotatably connected to the second movable clamp (12); One end of the third joint (25) is rotatably connected to the first connecting plate (32), and the other end of the third joint (25) is connected to the third connecting rod (22); one end of the fourth joint (26) is connected to the third connecting rod (22), and the other end of the fourth joint (26) is rotatably connected to the first movable clamp (11); The frame assembly (5) comprises a first fixing plate (51), a second fixing plate (52), a third fixing plate (53) and a fourth fixing plate (54); The first fixing plate (51), the second fixing plate (52), the third fixing plate (53) and the fourth fixing plate (54) are connected to form a square frame, and the third fixing plate (53) and the fourth fixing plate (54) are arranged opposite to each other; The third fixing plate (53) is provided with a first opening, and one end of the first connecting plate (32) is capable of moving in the first opening; The fourth fixing plate (54) is provided with a second opening (55), and the other end of the first connecting plate (32) is capable of moving in the second opening (55); wherein the positions of the first opening and the second opening (55) correspond one to one.

2. A packaging bag sealing device according to claim 1, It is characterized in that The second driving assembly (4) further comprises a second connecting plate (42), a first connecting rod (43) and a third connecting plate (44); The adjusting rod (41) is connected to one side of the second connecting plate (42), the other side of the second connecting plate (42) is connected to one end of the first connecting rod (43), the other end of the first connecting rod (43) is connected to the third connecting plate (44), and the third connecting plate (44) and the first connecting plate (32) are connected via the second elastic member (45).

3. A packaging bag sealing device according to claim 2, It is characterized in that The second movable jaw (12) is provided with a first heater, and the first movable jaw (11) is provided with a second heater.

4. A packaging bag sealing device according to claim 3, It is characterized in that The first driving assembly (3) further comprises a first elastic member (33), one end of the first elastic member (33) abuts against the first connecting plate (32), and the other end of the first elastic member (33) abuts against the first fixing plate (51); The second connecting rod (21) is arranged on one side of the frame assembly (5), the third connecting rod (22) is arranged on the other side of the frame assembly (5), and the first elastic member (33), the first connecting plate (32), the second connecting plate (42) and the third connecting plate (44) are all arranged in the frame assembly (5).

5. A packaging bag sealing device according to claim 4, It is characterized in that It also comprises a fixed bracket (6), a bracket connecting member (7), a first rotating bracket (8) and a second rotating bracket (9); the bracket connecting member (7) is connected to the fixed bracket (6), and the first rotating bracket (8) and the second rotating bracket (9) are both connected to the bracket connecting member (7); One end of the first rotating bracket (8) is connected to the second connecting rod (21) via a first rotating shaft, and the other end of the first rotating bracket (8) is connected to the bracket connecting member (7); the second rotating bracket (9) is connected to the third connecting rod (22) via a second rotating shaft, and the other end of the second rotating bracket (9) is connected to the bracket connecting member (7).

6. A packaging bag sealing device according to claim 5, It is characterized in that The driving member (31) is a cylinder, and the driving member (31) is arranged on the bracket connecting member (7).

7. A packaging machine, It is characterized in that It comprises a frame, a film supply device and the packaging bag sealing device according to any one of claims 1 to 6, wherein the film supply device and the packaging bag sealing device are both arranged on the frame, and the film supply device is connected to the packaging bag sealing device.

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