Sealing device and packaging equipment

Abstract

A sealing device and packaging equipment, used for sealing a packaging film, comprises a bracket, a sealing mechanism, a first connecting rod mechanism and a driving motor. The sealing mechanism comprises a first sealing device and a second sealing device respectively located on both sides of the packaging film, the first sealing device and the second sealing device are connected in a sliding manner along a first direction, and the first direction is arranged crosswise with the extension direction of the packaging film. The first connecting rod mechanism is arranged at one side of the packaging film, and a connecting rod transmission structure is formed by a first rotating member, a first connecting rod and a second connecting rod, and is connected to the first sealing device. The driving motor is arranged on the bracket and is connected to the first rotating member in a transmission manner, and drives the first rotating member to rotate, so that the first sealing device and the second sealing device are close to and separated. Thus, the moving trajectory of the first sealing device of the first connecting rod mechanism can make the moving trajectory of the first sealing device after clamping the packaging film with the second sealing device smoother, thereby increasing the time for clamping and sealing the packaging film and improving the sealing effect.

Description

Technical Field

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

[0002] In the field of horizontal pillow packaging machines, currently, most of the cylindrical packaging films are sealed by rotary sealing devices. Specifically, the packaging film moves at a constant speed in the horizontal direction, and the upper sealer of the rotary sealing device is arranged above the packaging film, and the lower sealer is arranged below the packaging film. The rotary sealing device drives the upper sealer and the lower sealer to perform circular movement. When the upper sealer rotates to the bottom and the lower sealer rotates to the top, the upper sealer and the lower sealer clamp and seal the packaging film.

[0003] Since the running tracks of the upper sealer and the lower sealer are circular, only when the upper sealer rotates to the bottom and the lower sealer rotates to the top, the processing surfaces of the upper sealer and the lower sealer will be aligned, and the packaging film will be clamped and sealed. The time for the upper sealer and the lower sealer to clamp and seal the packaging film is very short. When encountering a packaging film that is difficult to seal, poor sealing is likely to occur.

[0004] Therefore, there is an urgent need for a sealing device and packaging equipment that can increase the time for the upper sealer and the lower sealer to clamp and seal the packaging film and improve the sealing effect. Summary of the invention

[0005] In view of this, the main purpose of the present invention is to provide a sealing device and packaging equipment, which can increase the time for clamping and sealing the packaging film and improve the sealing effect.

[0006] The first aspect of the present application provides a sealing device for sealing a packaging film, comprising: a bracket; a sealing mechanism, the sealing mechanism having a first sealer and a second sealer, the first sealer being located at one side of the packaging film, the second sealer being located at the other side of the packaging film, the first sealer and the second sealer being slidably connected along a first direction, the first direction being arranged crosswise with an extension direction of the packaging film; a first connecting rod mechanism, the first connecting rod mechanism being arranged at one side of the packaging film, the first connecting rod mechanism having a first rotating member, a first connecting rod and a second connecting rod, the first rotating member being arranged on the bracket The first connecting rod is hinged to the bracket, and two ends of the first connecting rod are respectively hinged to the first rotating member and the first sealing device, and two ends of the second connecting rod are respectively hinged to the bracket and the middle position of the first connecting rod, and the distance between the hinge position of the first connecting rod and the second connecting rod and the packaging film in the first direction is smaller than the distance between the hinge position of the first connecting rod and the first rotating member and the packaging film in the first direction when the first rotating member rotates; a driving motor is arranged on the bracket and is transmission-connected to the first rotating member to drive the first rotating member to rotate, so that the first sealing device and the second sealing device are approached and separated.

[0007] As described above, by making the first sealer and the second sealer slidably connected along the first direction, the orientation of the first sealer and the second sealer can be kept unchanged. The first rotating member, the first connecting rod, and the second connecting rod form a first connecting rod mechanism, and the second rotating member, the third connecting rod, and the fourth connecting rod form a second connecting rod mechanism. When the driving motor drives the first rotating member and the second rotating member to rotate, the first connecting rod and the hinged end of the first rotating member can be driven to perform circular motion. Since the distance between the hinged position of the first connecting rod and the second connecting rod and the packaging film in the first direction is smaller than the distance between the hinged position of the first connecting rod and the first rotating member and the packaging film in the first direction when the first rotating member rotates. Therefore, as the first rotating member rotates, when the distance between the hinged end of the first link and the first rotating member and the packaging film in the first direction is greater than the distance between the hinged position of the first link and the second link and the packaging film in the first direction, the distance between the hinged position of the first link and the first sealer and the packaging film in the first direction is smaller than the distance between the hinged position of the first link and the second link and the packaging film in the first direction, so that the first sealer can approach the packaging film and clamp and seal the packaging film together with the second sealer.

[0008] In addition, since the hinged position of the first connecting rod and the first rotating member performs circular motion, the second connecting rod will be driven to rotate on the bracket, thereby changing the movement trajectory of the hinged position of the first connecting rod and the first sealer, so that the movement trajectory of the first sealer after clamping the packaging film with the second sealer is smoother, thereby increasing the time for the first sealer and the second sealer to clamp and seal the packaging film, and improving the sealing effect.

[0009] As a possible implementation of the first aspect, it also includes a second link mechanism, which is arranged on the other side of the packaging film. The second link mechanism has a second rotating member, a third link and a fourth link, which are symmetrically arranged with the first rotating member, the first link and the second link of the first link mechanism respectively, and one end of the third link is hinged to the second sealer.

[0010] As described above, by arranging the second connection mechanism symmetrically with the first connection mechanism, the first sealer and the second sealer can move synchronously, so that the first sealer and the second sealer can clamp and seal the packaging film more stably, thereby improving the sealing effect.

[0011] As a possible implementation of the first aspect, the sealing mechanism further comprises: a first crossbeam, the first sealer is arranged on the first crossbeam, and one end of the first connecting rod is hinged to the first crossbeam; a second crossbeam, the second sealer is arranged on the second crossbeam, and one end of the third connecting rod is hinged to the second crossbeam; and a slide rail, which is slidably connected to the first crossbeam and the second crossbeam.

[0012] As described above, a specific structure for sliding connection between the first sealer and the second sealer is provided, the first beam and the second beam are slidably connected via a slide rail, and the first sealer and the second sealer are slidably connected by installing the first beam and the second beam respectively.

[0013] As a possible implementation of the first aspect, a first adjustment hole is provided on the first crossbeam, and the first adjustment hole is a through hole extending along the first direction. The sealing mechanism further comprises: an adjusting nut, the adjusting nut is located at an end of the first adjustment hole away from the first sealer; and an adjusting rod, the adjusting rod is threadedly connected to the adjusting nut, and the adjusting rod passes through the first adjustment hole and is hinged to the first sealer.

[0014] Therefore, by adjusting the distance between the first sealer and the first beam, the positions where the first sealer and the second sealer start and end clamping the packaging film can be adjusted, and then the time for the first sealer and the second sealer to clamp and seal the packaging film can be adjusted, thereby improving the sealing effect.

[0015] As a possible implementation manner of the first aspect, a bushing is provided in the first adjustment hole, and the adjustment rod passes through the bushing and is slidably connected to the bushing.

[0016] As described above, by arranging a bushing in the first adjusting hole, the adjusting rod and the bushing are slidably connected, thereby reducing the friction between the adjusting rod and the first adjusting hole and avoiding damage to parts due to wear.

[0017] As a possible implementation of the first aspect, a second adjustment hole is further provided on the first crossbeam, and the second adjustment hole is a through hole extending along the first direction. The sealing mechanism also has: an adjusting screw, which is threadedly connected to the second adjusting hole; and a spring, one end of the spring abuts against the first sealer, and the other end extends into the second adjustment hole and abuts against the adjusting screw.

[0018] From the above, the first sealer can be pushed away from the first crossbeam by the spring, and when the first sealer and the second sealer clamp and seal the packaging film, sufficient clamping force can be maintained between the first sealer and the second sealer, thereby improving the sealing effect. By adjusting the position of the adjusting screw in the second adjusting hole, the elastic force applied by the spring to the first sealer can be adjusted, thereby adjusting the clamping force between the first sealer and the second sealer.

[0019] As a possible implementation of the first aspect, the first adjustment hole, the adjustment rod, the adjustment nut, the second adjustment hole, the adjustment screw and the spring are arranged in pairs and are respectively arranged at positions close to both ends of the first beam.

[0020] As described above, by arranging the first adjustment hole, the adjustment rod, the adjustment nut, the second adjustment hole, the adjustment screw and the spring at both ends of the first beam, the connection between the first sealer and the first beam can be made more stable, and the stability of the first sealer when moving relative to the first beam can be improved.

[0021] As a possible implementation manner of the first aspect, the first direction is a vertical direction, and the first direction is perpendicular to an extension direction of the packaging film.

[0022] As described above, by making the first direction perpendicular to the extending direction of the packaging film, the first sealer and the second sealer can clamp and seal the packaging film more stably, thereby improving the sealing effect.

[0023] As a possible implementation manner of the first aspect, when the hinged position between the first connecting rod and the first rotating member rotates to the position farthest from the packaging film, the second connecting rod is within a range of ±5° in the vertical direction.

[0024] From the above, when the hinged position of the first connecting rod and the first rotating member rotates to the position farthest from the packaging film, the movement of the first sealer in the first direction changes from approaching the second sealer to moving away from the second sealer. By making the second connecting rod within the vertical direction ±5° at this time, the second connecting rod is approximately vertical, so that when the hinged position of the second connecting rod and the first connecting rod rotates, the movement in the first direction changes from moving away from the second sealer to moving closer to the second sealer. In this way, the movement trajectory of the first sealer can be made smoother, thereby increasing the time for the first sealer and the second sealer to clamp and seal the packaging film, and improving the sealing effect.

[0025] A second aspect of the present application provides a packaging device, comprising any implementation form of the sealing device in the first aspect of the present application.

[0026] As described above, by making the moving track of the first sealer after clamping the packaging film with the second sealer more gentle, the time for the first sealer and the second sealer to clamp and seal the packaging film can be increased, thereby improving the sealing effect.

[0027] These and other aspects of the invention will become apparent from the following description of the embodiment(s). BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The following further illustrates the various features of the present invention and the relationship between the various features with reference to the accompanying drawings. The accompanying drawings are all exemplary, some features are not shown in actual proportion, and some drawings may omit the conventional features in the field involved in the present application and are not necessary for the present application, or additionally show the features that are not necessary for the present application. The combination of the various features shown in the accompanying drawings is not intended to limit the present application. In addition, throughout this specification, the same figure numerals refer to the same content. The specific description of the drawings is as follows:

[0029] Figure 1 It is a schematic diagram of the sealing process of the rotary sealing device;

[0030] Figure 2 for Figure 1 Schematic diagram of the motion trajectory of the upper and lower sealers;

[0031] Figure 3 This is one of the three-dimensional structural schematic diagrams of the sealing device in the embodiment of the present application;

[0032] Figure 4 This is the second schematic diagram of the three-dimensional structure of the sealing device in the embodiment of the present application;

[0033] Figure 5 for Figure 3 A schematic diagram of the side projection structure of the middle sealing device;

[0034] Figure 6 for Figure 3 A schematic diagram of a process in which the first sealer and the second sealer seal the packaging film;

[0035] Figure 7 for Figure 3 Schematic diagram of the motion trajectory of the first sealer and the second sealer;

[0036] Figure 8 for Figure 3 Schematic diagram of the cross-section structure of the first crossbeam.

[0037] Description of Reference Numerals

[0038] 10 Sealing device; 100 bracket; 200 sealing mechanism; 210 first crossbeam; 211 first adjustment hole; 212 second adjustment hole; 213 bushing; 220 second crossbeam; 230 slide rail; 240 first sealer; 250 second sealer; 260 adjustment rod; 261 operating part; 270 adjustment nut; 280 adjustment screw; 290 spring; 300 first connecting rod mechanism; 310 first rotating member; 320 first connecting rod; 330 second connecting rod; 400 second connecting rod mechanism; 410 second rotating member; 420 third connecting rod; 430 fourth connecting rod; 500 driving motor; 20 rotary sealing device; 21 upper sealer; 22 lower sealer; 30 packaging film. DETAILED DESCRIPTION

[0039] The words "first, second, third, etc." and similar terms in the specification and claims are only used to distinguish similar objects and do not represent a specific ordering of the objects. It is understandable that the specific order or sequence can be interchanged where permitted so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0040] The term "comprising" as used in the description and claims should not be interpreted as being limited to what is listed thereafter; it does not exclude other elements. It should therefore be interpreted as specifying the presence of the features, integers or components mentioned, but does not exclude the presence or addition of one or more other features, integers or components and groups thereof. Thus, the expression "a device comprising means A and B" should not be limited to a device consisting of components A and B only.

[0041] References to "one embodiment" or "an embodiment" in this specification mean that a particular feature, structure, or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present invention. Therefore, the phrases "in one embodiment" or "in an embodiment" appearing in various places in this specification do not necessarily refer to the same embodiment, but may refer to the same embodiment. In addition, in one or more embodiments, the particular features, structures, or characteristics can be combined in any appropriate manner, as would be apparent to one of ordinary skill in the art from this disclosure.

[0042] In the prior art, a rotary sealing device 20 is usually used to seal the cylindrical packaging film 30 . Figure 1 Schematic diagram of the sealing process of the rotary sealing device 20. Figure 2 for Figure 1 Schematic diagram of the motion trajectory of the upper sealer 21 and the lower sealer 22. Figure 1 , Figure 2 As shown, the rotary sealing device 20 includes an upper sealer 21 and a lower sealer 22, wherein the upper sealer 21 is arranged above the packaging film 30, and the lower sealer 22 is arranged below the packaging film 30. The packaging film 30 is transported from left to right, the upper sealer 21 makes a circular motion in the counterclockwise direction, and the lower sealer 22 makes a circular motion in the clockwise direction, so that the upper sealer 21 and the lower sealer 22 rotate to a position close to one side of the packaging film 30 and move from left to right, and keep the same speed and direction as the packaging film 30. When the upper sealer 21 rotates to the lowest position and the lower sealer 22 rotates to the highest position, the processing surface of the upper sealer 21 fits with the processing surface of the lower sealer 22, clamps the packaging film 30 in the middle, and performs sealing and cutting operations on the packaging film 30.

[0043] Since the upper sealer 21 and the lower sealer 22 of the rotary sealing device 20 perform circular motions as the packaging film 30 is conveyed, only when the upper sealer 21 rotates to the lowest position and the lower sealer 22 rotates to the highest position can the upper sealer 21 and the lower sealer 22 complete the clamping and sealing of the packaging film 30. Therefore, the time for the upper sealer 21 and the lower sealer 22 to seal the packaging film 30 is very short, and when the packaging film 30 is not easy to seal, poor sealing is likely to occur.

[0044] The specific structure of the sealing device 10 in the embodiment of the present application is described in detail below in conjunction with the drawings.

[0045] Figure 3 This is one of the three-dimensional structural schematic diagrams of the sealing device 10 in the embodiment of the present application; Figure 4 This is the second schematic diagram of the three-dimensional structure of the sealing device 10 in the embodiment of the present application; Figure 5 for Figure 3 The side projection structure diagram of the sealing device 10 is shown in FIG. Figure 3 , Figure 4 , Figure 5 As shown, the sealing device 10 in the present application includes a bracket 100, a sealing mechanism 200, a first connecting rod mechanism 300, a second connecting rod mechanism 400 and a driving motor 500. The driving motor 500, the first connecting rod mechanism 300 and the second connecting rod 330 are arranged on the bracket 100, the driving motor 500 provides power for the first connecting rod mechanism 300 and the second connecting rod mechanism 400, the first connecting rod mechanism 300 and the second connecting rod mechanism 400 are connected to the sealing mechanism 200, and the sealing mechanism 200 is driven to seal the packaging film 30.

[0046] like Figure 3 , Figure 5 As shown, the first link mechanism 300 is arranged above the packaging film 30, and the first link mechanism 300 includes a first rotating member 310, a first connecting rod 320 and a second connecting rod 330. Among them, the first rotating member 310 is arranged on the bracket 100 and is hinged to the bracket 100, so that the first rotating member 310 can rotate on the bracket 100. One end of the first connecting rod 320 is hinged to the first rotating member 310, and the other end is hinged to the first crossbeam 210 described below of the sealing mechanism 200. The hinge position of the first connecting rod 320 and the first rotating member 310 is located at the eccentric position of the first rotating member 310, so that when the first rotating member 310 rotates, it can drive the hinge position of the first connecting rod 320 and the first rotating member 310 to make a circular motion. One end of the second connecting rod 330 is hinged to the bracket 100, and the other end is hinged to the middle position of the first connecting rod 320.

[0047] like Figure 3 , Figure 5 As shown, the second link mechanism 400 is arranged below the packaging film 30, and the second link mechanism 400 includes a second rotating member 410, a third link 420 and a fourth link 430. The second rotating member 410, the third link 420 and the fourth link 430 of the second link mechanism 400 are symmetrically arranged with the first rotating member 310, the first link 320 and the second link 330 of the first link mechanism 300, respectively, and the connection relationship between the second rotating member 410, the third link 420 and the fourth link 430 is not repeated here. The other end of the third link 420 is hinged to the second beam 220, so that the second beam 220 can be driven to move.

[0048] like Figure 4 As shown, the drive motor 500 is disposed on the bracket 100, and is located on both sides of the bracket 100 with the first link mechanism 300 and the second link mechanism 400, respectively, so as to avoid affecting the movement of the first link mechanism 300 and the second link mechanism 400. The drive shaft of the drive motor 500 is connected by, for example, Figure 4The synchronous toothed belt shown in the figure is connected to the second rotating member 410 by belt transmission, or can be connected to the second rotating member 410 by gear transmission, which is not limited. The second rotating member 410 is connected to the first rotating member 310 by gear transmission. Thus, the driving motor 500 can synchronously drive the first rotating member 310 and the second rotating member 410 to rotate.

[0049] like Figure 3 , Figure 4 , Figure 5 As shown, the sealing mechanism 200 includes a first beam 210, a second beam 220, a slide rail 230, a first sealer 240 and a second sealer 250. The first sealer 240 is arranged on the first beam 210, located below the first beam 210, and the other end of the first connecting rod 320 is hinged to the first beam 210. The second sealer 250 is arranged on the second beam 220, located above the second beam 220, and the other end of the third connecting rod 420 is hinged to the second beam 220. The slide rail 230 is fixed on the second beam 220, and the first beam 210 is slidably connected to the slide rail 230, so that the first beam 210 and the second beam 220 are slidably connected. The slide rail 230 is arranged along the vertical direction (i.e., the first direction) and is perpendicular to the extension direction of the packaging film 30, so that the processing surfaces of the first sealer 240 and the second sealer 250 are always facing the packaging film 30, so as to improve the stability when clamping and sealing the packaging film 30 and improve the sealing effect of the packaging film 30.

[0050] In some embodiments, the first crossbeam 210 and the second crossbeam 220 can be omitted, so that the other end of the first connecting rod 320 is directly hinged to the first sealer 240, and the other end of the third connecting rod 420 is directly hinged to the second sealer 250. Alternatively, the other ends of the first connecting rod 320 and the third connecting rod 420 can also be hinged to the first sealer 240 and the second sealer 250 respectively through other devices, which is not limited.

[0051] Figure 6 for Figure 3 A schematic diagram of the process of the first sealer 240 and the second sealer 250 sealing the packaging film 30; Figure 7 for Figure 3 Schematic diagram of the motion trajectory of the first sealer 240 and the second sealer 250. Figure 3-Figure 7As shown, when the driving motor 500 drives the first rotating member 310 and the second rotating member 410 to rotate, the first connecting rod 320 can be driven to perform circular motion at one end hinged with the first rotating member 310. Since the first connecting rod mechanism 300 and the second connecting rod mechanism 400 are symmetrically arranged, the motion trajectories of the first connecting rod mechanism 300 and the second connecting rod mechanism 400 remain symmetrical. Below, taking the first connecting rod mechanism 300 as an example, the motion of the first connecting rod mechanism 300 and the second connecting rod mechanism 400 is described.

[0052] The hinge position of the first rotating member 310 and the bracket 100 is set as point A, the hinge position of the first rotating member 310 and the first connecting rod 320 is set as point B, the hinge position of the first connecting rod 320 and the second connecting rod 330 is set as point C, the hinge position of the second connecting rod 330 and the bracket 100 is set as point D, and the hinge position of the first connecting rod 320 and the first crossbeam 210 is set as point E. The first rotating member 310 rotates clockwise with point A as the center, so that point B performs a circular motion with point A as the center. When point B rotates upward from the lowest point in the clockwise direction, the first connecting rod 320 can be driven to rotate with point C as the center, so that point E moves downward, that is, the first sealer 240 gradually approaches the packaging film 30. When point B rotates to the highest point, point E is at the lowest position, that is, the first sealer 240 is at the lowest position. When point B rotates clockwise from the highest point downward, the first connecting rod 320 can be driven to rotate around point C, so that point E moves upward, that is, the first sealer 240 gradually moves away from the packaging film 30. When point B rotates clockwise from the leftmost side to the rightmost side, point E moves from left to right, that is, the first sealer 240 moves along the extension direction of the packaging film 30. Point B rotates clockwise around point A, so that point E moves along the extension direction of the packaging film 30. Figure 7 The first sealer 240 moves along the triangular trajectory shown in the figure, so that the first sealer 240 and the second sealer 250 clamp and seal the packaging film 30 at a position where the curvature is small and the trajectory is approximately a straight line, that is, Figure 7 The packaging film 30 is sealed in the area between XY shown in FIG. Thus, the time for the first sealer 240 and the second sealer 250 to clamp and seal the packaging film 30 can be increased, thereby improving the sealing effect.

[0053] like Figure 5As shown, when point B reaches the highest point, the second connecting rod 330 is in an approximately vertical state, specifically, the second connecting rod 330 is within the range of ±5° in the vertical direction. Preferably, the second connecting rod 330 is in a vertical state, so that point C is in the highest position. Thus, when point B is about to reach the highest point in the clockwise direction, while driving point E to move downward, the second connecting rod 330 can also be driven to rotate clockwise, from an inclined state to a vertical state, so that point C rises, thereby reducing the degree of decline of point E, thereby making the trajectory of point E more gentle. When point B rotates downward from the highest point in the clockwise direction, while driving point E to move upward, the second connecting rod 330 can also be driven to rotate clockwise, from a vertical state to an inclined state, thereby reducing the degree of rise of point E, thereby making the trajectory of point E more gentle. Thus, the time for the first sealer 240 and the second sealer 250 to clamp and seal the packaging film 30 can be increased, thereby improving the sealing effect.

[0054] Figure 8 for Figure 3 Schematic diagram of the cutaway structure of the first crossbeam. Figure 8 As shown, the first crossbeam 210 is provided with a first adjustment hole 211, which is a through hole extending in the vertical direction. The sealing mechanism 200 also has an adjustment nut 270 and an adjustment rod 260, and the adjustment nut is located at one end of the first adjustment hole 211 away from the first sealer 240. The adjustment rod 260 is threadedly connected with the adjustment nut 270, and the adjustment rod 260 passes through the first adjustment hole 211 and is hinged to the first sealer 240. Therefore, by adjusting the distance between the first sealer 240 and the first crossbeam 210, the position of the first sealer 240 and the second sealer 250 starting and ending to clamp the packaging film 30 can be adjusted, and then the time for the first sealer 240 and the second sealer 250 to clamp and seal the packaging film 30 can be adjusted, thereby improving the sealing effect.

[0055] like Figure 8 As shown, a bushing 213 is provided in the first adjustment hole 211, and the bushing 213 may be, for example, an oil-free bushing, and the adjustment rod 260 passes through the bushing 213 and is slidably connected with the bushing 213. Therefore, by providing the bushing 213 in the first adjustment hole 211, the adjustment rod 260 is slidably connected with the bushing 213, thereby reducing the friction between the adjustment rod 260 and the first adjustment hole 211, and avoiding damage to parts due to wear.

[0056] like Figure 8As shown, the first crossbeam 210 is also provided with a second adjustment hole 212, and the second adjustment hole 212 is a through hole extending vertically. The sealing mechanism 200 also has an adjustment screw 280 and a spring 290, and the adjustment screw 280 is threadedly connected with the second adjustment hole 212. One end of the spring 290 abuts against the first sealer 240, and the other end extends into the second adjustment hole 212 and abuts against the adjustment screw 280. Thus, the first sealer 240 can be pushed away from the first crossbeam 210 by the spring 290, and when the first sealer 240 and the second sealer 250 clamp and seal the packaging film, sufficient clamping force can be maintained between the first sealer 240 and the second sealer 250, thereby improving the sealing effect. By adjusting the position of the adjustment screw 280 in the second adjustment hole 212, the elastic force applied by the spring 290 to the first sealer 240 can be adjusted, thereby adjusting the clamping force between the first sealer 240 and the second sealer 250.

[0057] like Figure 8 As shown, the first adjustment hole 211, the adjustment rod 260, the adjustment nut 270, the second adjustment hole 212, the adjustment screw 280 and the spring 290 are arranged in pairs and are respectively arranged at positions close to both ends of the first crossbeam 210. Therefore, by arranging the first adjustment hole 211, the adjustment rod 260, the adjustment nut 270, the second adjustment hole 212, the adjustment screw 280 and the spring 290 at both ends of the first crossbeam 210, the connection between the first sealer 240 and the first crossbeam 210 can be made more stable, and the stability of the first sealer 240 when moving relative to the first crossbeam 210 can also be improved.

[0058] like Figure 3 , Figure 4 , Figure 8 As shown, the upper end of the adjusting rod 260 is exposed from the upper surface of the first cross beam 210, and a circular operating portion 261 is formed at the upper end of the adjusting rod 260 to facilitate the staff to operate the adjusting rod 260 up and down by rotating the operating portion 261, thereby adjusting the position of the adjusting nut 270 on the adjusting rod 260, so that the sealing time can be conveniently adjusted.

[0059] In some embodiments, the second link 330 and the fourth link 430 can be as follows: Figure 5 The illustrated position is between the first link 320 and the third link 420 , and may also be located outside the first link 320 and the third link 420 , which is not limited thereto.

[0060] In some embodiments, the second linkage mechanism 400 can also be replaced by other structures. When the first linkage 320 structure drives the first sealer 240 to move downward and the second sealer 250 to clamp and seal the packaging film 30, the first sealer 240 can drive the second sealer 250 to move along the extension direction of the packaging film 30, thereby completing the sealing of the packaging film 30.

[0061] The present application also provides a packaging device, which includes a sealing device 10 for sealing an opening of a packaging film 30 .

[0062] Note that the above are only preferred embodiments of the present application and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present application is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may also include more other equivalent embodiments without departing from the concept of the present invention, all of which belong to the protection scope of the present invention.

Claims

1. A sealing device, characterized in that: Used to seal packaging films, including: Bracket; A sealing mechanism, wherein the sealing mechanism comprises a first sealer and a second sealer, wherein the first sealer is located at one side of the packaging film, and the second sealer is located at the other side of the packaging film, and the first sealer and the second sealer are slidably connected along a first direction, and the first direction is arranged to intersect with the extension direction of the packaging film; A first link mechanism, the first link mechanism is arranged at a side position of the packaging film, the first link mechanism comprises a first rotating member, a first link and a second link, the first rotating member is arranged on the bracket and hinged to the bracket, two ends of the first link are respectively hinged to the first rotating member and the first sealer, two ends of the second link are respectively hinged to the bracket and the middle position of the first link, the distance between the hinge position of the first link and the second link and the packaging film in the first direction is smaller than the distance between the hinge position of the first link and the first rotating member and the packaging film in the first direction when the first rotating member rotates; the first direction is a vertical direction, and the first direction is perpendicular to the extension direction of the packaging film; when the hinge position of the first link and the first rotating member rotates to the position farthest from the packaging film, the second link is within the range of ±5° in the vertical direction; A driving motor, which is arranged on the bracket and is in driving connection with the first rotating member, driving the first rotating member to rotate, so that the first sealing device and the second sealing device are brought close to and separated from each other; A second link mechanism is arranged at the other side of the packaging film, and the second link mechanism has a second rotating member, a third link and a fourth link, which are symmetrically arranged with the first rotating member, the first link and the second link of the first link mechanism respectively, and one end of the third link is hinged to the second sealer.

2. The sealing device according to claim 1, characterized in that: The sealing mechanism also has: a first crossbeam, the first sealer being arranged on the first crossbeam, and one end of the first connecting rod being hinged to the first crossbeam; a second crossbeam, the second sealer is arranged on the second crossbeam, and one end of the third connecting rod is hinged to the second crossbeam; A slide rail is slidably connected to the first crossbeam and the second crossbeam.

3. The sealing device according to claim 2, characterized in that: The first crossbeam is provided with a first adjustment hole, the first adjustment hole is a through hole extending along the first direction, and the sealing mechanism further comprises: an adjusting nut, wherein the adjusting nut is located at a position of the first adjusting hole away from one end of the first sealer; An adjusting rod is threadedly connected to the adjusting nut, and the adjusting rod passes through the first adjusting hole and is hinged to the first sealer.

4. The sealing device according to claim 3, characterized in that: A bushing is arranged in the first adjustment hole, and the adjustment rod passes through the bushing and is slidably connected with the bushing.

5. The sealing device according to claim 4, characterized in that: The first crossbeam is also provided with a second adjustment hole, the second adjustment hole is a through hole extending along the first direction, and the sealing mechanism further comprises: an adjusting screw, the adjusting screw being threadedly connected to the second adjusting hole; A spring, one end of which is in contact with the first sealer, and the other end of which extends into the second adjustment hole and in contact with the adjustment screw.

6. The sealing device according to claim 5, characterized in that: The first adjustment hole, the adjustment rod, the adjustment nut, the second adjustment hole, the adjustment screw and the spring are arranged in pairs and are respectively arranged at positions close to both ends of the first crossbeam.

7. A packaging device, characterized in that: The invention comprises the sealing device according to any one of claims 1 to 6.

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