Packaging bag opening device

Abstract

The invention provides a packaging bag opening device. The packaging bag opening device comprises a support; the bottom bag opening assembly is arranged at the bottom of the support and used for opening the bottom of the packaging bag; the top bag opening assembly is arranged at the top end of the support and used for opening the top of the packaging bag; and the first driving assembly is arranged on the support, and the first driving assembly drives the top bag opening assembly to do reciprocating motion so as to change the distance of the top bag opening assembly, so that the packaging bag is opened. Through the arrangement of the top bag opening assembly and the bottom bag opening assembly, the top and the bottom of a packaging bag are adsorbed, the packaging bag is opened, the top bag opening assembly is driven by the first driving assembly to move in a reciprocating mode, the bottom bag opening assembly is matched with the top bag opening assembly to open the packaging bag, the packaging bag is opened in cooperation with an external packaging bag conveying assembly, and meanwhile the packaging bag is opened. The top bag opening assembly and the bottom bag opening assembly open one packaging bag each time, and it is avoided that too many packaging bags enter the packaging bag, and the bag opening efficiency is reduced.

Description

Technical Field

[0001] This application relates to a bag opening structure, and particularly to a device for opening packaging bags. Background Art

[0002] In the field of automated packaging production, the automatic bag opening process of packaging bags is a key link affecting the overall production efficiency. In the existing technology, the bag opening operation is generally carried out by means of a multi-suction cup array or a manipulator clamping. However, the following technical bottlenecks exist in actual applications: First, the traditional bag opening device lacks an effective bag mouth separation control mechanism, and multiple packaging bags are prone to stacking interference during the conveying process, resulting in a reduction in the bag opening success rate; Second, conventional equipment mostly adopts a bag opening actuator in a single direction, and it is difficult to effectively overcome the electrostatic adsorption effect of the packaging bag during the adsorption process. Especially for ultra-thin composite film packaging bags, misoperations such as synchronous opening of double bags often occur; Third, the timing coordination accuracy between the existing bag opening mechanism and the conveying device is insufficient. When the packaging bag is in a non-ideal pose, it is extremely easy to cause equipment jams or even mechanical failures.

[0003] In high-speed continuous production lines, traditional bag opening equipment generally has the problem of "multiple bags occurring simultaneously". Due to the lack of an effective single bag isolation control mechanism, multiple packaging bags often enter the bag opening station at the same time, which not only causes abnormal fluctuations in the load of the vacuum adsorption system, but also leads to misalignment in the subsequent filling process. Although some improvement schemes attempt to identify the bag body by adding an optoelectronic sensor array, this passive detection method has a lag in response and greatly increases the equipment complexity and maintenance cost. Summary of the Invention

[0004] Embodiments of this application provide a device for opening packaging bags to solve the problems existing in the related technology. The technical solutions are as follows:

[0005] Embodiments of this application provide a device for opening packaging bags, including:

[0006] A bracket;

[0007] A bottom bag opening assembly, which is arranged at the bottom of the bracket and is used for opening the bottom of the packaging bag;

[0008] A top bag opening assembly, which is arranged at the top of the bracket and is used for opening the top of the packaging bag;

[0009] A first driving assembly, which is arranged on the bracket. The first driving assembly drives the top bag opening assembly to reciprocate, so as to change the distance of the top bag opening assembly to open the packaging bag.

[0010] In one embodiment,

[0011] The top bag opening assembly includes:

[0012] A slide rail is provided on a bracket;

[0013] Two first adsorption components are provided. The first adsorption components are relatively arranged on the slide rail, and a first driving component drives the two first adsorption components to reciprocate in opposite directions to change the distance between the two first adsorption components.

[0014] In one embodiment,

[0015] The first adsorption component includes:

[0016] A slider is provided on the slide rail;

[0017] A clamping block is provided on the slider. When the first driving component drives the slider to move, the two clamping blocks reciprocate in opposite directions to change the distance between the two clamping blocks;

[0018] A fixing rod is provided on the slider;

[0019] At least two mounting blocks are adjustably provided on the fixing rod;

[0020] A first suction cup is provided on the mounting block, and the first suction cup adsorbs the packaging bag.

[0021] In one embodiment,

[0022] The first driving component includes:

[0023] A driving motor is mounted on the bracket;

[0024] A turntable is provided at the output end of the driving motor;

[0025] A first connecting rod has one end provided on the turntable, and the end of the first connecting rod away from the turntable is provided on one of the clamping blocks;

[0026] A second connecting rod has one end provided on the turntable, and the end of the second connecting rod away from the turntable is provided on the clamping block far from the first connecting rod. When the turntable rotates, the first connecting rod and the second connecting rod drive the two clamping blocks to reciprocate to change the distance between the two clamping blocks.

[0027] In one embodiment,

[0028] The connection points of the first connecting rod and the second connecting rod with the turntable are located on both sides of the turntable;

[0029] The connection points of the first connecting rod and the second connecting rod with the turntable are on the diameter of the turntable.

[0030] In one embodiment,

[0031] The bottom bag-opening assembly includes:

[0032] An adjustment assembly, which is arranged on the bracket;

[0033] Two second adsorption assemblies, both of which are arranged on the adjustment assembly, and the adjustment assembly adjusts the second adsorption assemblies according to the size of the packaging bag;

[0034] Two second driving assemblies, both of which are arranged on the adjustment assembly, and the second driving assembly controls the opening and closing of the corresponding second adsorption assembly.

[0035] In one embodiment,

[0036] The adjustment assembly includes:

[0037] A fixed block, which is arranged on the bracket and has two mounting grooves on it;

[0038] Two mounting rods, which are adjustably arranged on the fixed block and are adjustably arranged in the corresponding mounting grooves;

[0039] Two mounting seats, which are adjustably arranged on the corresponding mounting rods, and the two second adsorption assemblies and the second driving assemblies are respectively arranged on the corresponding mounting seats.

[0040] In one embodiment,

[0041] The second adsorption assembly includes:

[0042] A first clamping plate, which is arranged on the mounting seat, and the second driving assembly drives the first clamping plate to rotate relative to the mounting seat;

[0043] A second clamping plate, which is arranged on the mounting seat, and when the first clamping plate rotates, the second clamping plate rotates in the opposite direction following the first clamping plate;

[0044] Two second suction cups, which are respectively arranged on the first clamping plate and the second clamping plate.

[0045] In one embodiment,

[0046] The second adsorption assembly further includes:

[0047] Two gears, which are respectively arranged on the first clamping plate and the second clamping plate, and the two gears are meshed. When the driving assembly drives the first clamping plate to rotate, under the action of the gears, the second clamping plate rotates in the opposite direction following the first clamping plate.

[0048] In one embodiment,

[0049] The second driving assembly includes:

[0050] A cylinder is arranged on a mounting base, and the cylinder drives a first clamping plate to rotate relative to the mounting base.

[0051] The advantages or beneficial effects in the above technical solutions at least include:

[0052] Through the settings of the top bag-opening assembly and the bottom bag-opening assembly, the top and bottom of the packaging bag are adsorbed, and the packaging bag is opened. The top bag-opening assembly is driven by a first driving assembly to reciprocate, and the bottom bag-opening assembly cooperates with the top bag-opening assembly to open the packaging bag. In cooperation with an external packaging bag conveying assembly, the bag-opening of the packaging bag is completed. At the same time, the top bag-opening assembly and the bottom bag-opening assembly open one packaging bag each time, avoiding too many packaging bags from entering and reducing the bag-opening efficiency.

[0053] The above summary is only for the purpose of the specification and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present application will be readily apparent by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In the drawings, unless otherwise specified, the same reference numerals throughout the several views represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0055] Figure 1 It is a schematic structural diagram of the present invention;

[0056] Figure 2 It is a schematic structural diagram of another angle of the present invention;

[0057] Figure 3 For Figure 1 It is a schematic structural diagram of the top bag-opening assembly and the first driving assembly in

[0058] Figure 4 For Figure 1 It is a schematic structural diagram of the bottom bag-opening assembly in

[0059] Figure 5 For Figure 1 It is a schematic structural diagram of the adjusting assembly in

[0060] Figure 6 For Figure 1 It is a schematic structural diagram of the gear in the second adsorption assembly in

[0061] 100, bracket;

[0062] 200. Bottom bag-opening assembly; 210. Adjusting assembly; 211. Fixed block; 212. Mounting rod; 213. Mounting seat; 214. Mounting groove; 220. Second adsorption assembly; 221. First clamping plate; 222. Second clamping plate; 223. Second suction cup; 224. Gear; 230. Second driving assembly; 231. Cylinder

[0063] 300. Top bag-opening assembly; 310. Slide rail; 320. First adsorption assembly; 321. Slide block; 322. Clamping block; 323. Fixed rod; 324. Mounting block; 325. First suction cup

[0064] 400. First driving assembly; 410. Driving motor; 420. Turntable; 430. First connecting rod; 440. Second connecting rod Detailed implementation manners

[0065] In the following text, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are regarded as exemplary rather than restrictive in nature.

[0066] Figures 1-6 Shows a structural diagram of a bag-opening device for a packaging bag according to an embodiment of the present application. As Figures 1-6 shown, the bag-opening device may include:

[0067] Bracket 100;

[0068] Bottom bag-opening assembly 200, which is arranged at the bottom of bracket 100 and is used for opening the bottom of the packaging bag;

[0069] Top bag-opening assembly 300, which is arranged at the top of bracket 100 and is used for opening the top of the packaging bag;

[0070] First driving assembly 400, which is arranged on bracket 100. The first driving assembly 400 drives the top bag-opening assembly 300 to reciprocate, so as to change the distance of the top bag-opening assembly 300, so as to open the packaging bag.

[0071] In this embodiment, during use, the packaging bag is conveyed to the bracket 100 through an external production line. It passes between the top bag-opening assembly 300 and the bottom bag-opening assembly 200. The first driving assembly 400 drives the top bag-opening assembly 300 to open. The bottom bag-opening assembly 200 cooperates with the top bag-opening assembly 300 to adsorb the packaging bag, and through the reciprocating movement of the top bag-opening assembly 300 and the bottom bag-opening assembly 200, the bottom bag-opening assembly 200 and the top bag-opening assembly 300 are opened and closed, and in cooperation with the external packaging bag conveying assembly, the bag-opening of the packaging bag is completed.

[0072] The top bag-opening assembly 300 and the bottom bag-opening assembly 200 can be adjusted according to the actual size of the packaging bag.

[0073] Specifically, when multiple bags enter the bottom bag-opening assembly 200 and the top bag-opening assembly 300 simultaneously, the top bag-opening assembly 200 and the bottom bag-opening assembly 300 can separate the multiple packaging bags to prevent multiple packaging bags from entering simultaneously and affecting the bag-opening efficiency.

[0074] Through the settings of the top bag-opening assembly 300 and the bottom bag-opening assembly 200, the top and bottom of the packaging bag are adsorbed and the packaging bag is opened. The first driving assembly 400 drives the top bag-opening assembly 300 to reciprocate, and the bottom bag-opening assembly 200 cooperates with the top bag-opening assembly 300 to open the packaging bag. In cooperation with the external packaging bag conveying assembly, the bag-opening of the packaging bag is completed. At the same time, the top bag-opening assembly 300 and the bottom bag-opening assembly 200 open one packaging bag each time to prevent too many packaging bags from entering and reducing the bag-opening efficiency.

[0075] As Figures 1-3 shown, in one implementation,

[0076] The top bag-opening assembly 300 includes:

[0077] A slide rail 310, and the slide rail 310 is arranged on the bracket 100;

[0078] Two first adsorption assemblies 320, the first adsorption assemblies 320 are relatively arranged on the slide rail 310, and the first driving assembly 400 drives the two first adsorption assemblies 320 to reciprocate in opposite directions to change the distance between the two first adsorption assemblies 320.

[0079] In this embodiment, there are two first adsorption assemblies 320. The two first adsorption assemblies 320 are driven by the first driving assembly 400 to reciprocate along the slide rail 310 to change the distance between the two first adsorption assemblies 320, so as to realize the adsorption of the packaging bag by the first adsorption assemblies 320 and open the packaging bag.

[0080] As Figures 1-3 shown, in one implementation,

[0081] The first adsorption assembly 320 includes:

[0082] A slider 321, which is arranged on the slide rail 310;

[0083] A clamping block 322, which is arranged on the slider 321. When the first driving assembly 400 drives the slider 321 to move, the two clamping blocks 322 move reciprocally in opposite directions to change the distance between the two clamping blocks 322;

[0084] A fixing rod 323, which is arranged on the slider 321;

[0085] At least two mounting blocks 324, and at least two mounting blocks 324 are adjustably arranged on the fixing rod 323;

[0086] A first suction cup 325, which is arranged on the mounting block 324, and the first suction cup 325 adsorbs the packaging bag.

[0087] In this embodiment, the two sliders 321 are both arranged on the slide rail 310, the clamping blocks 322 are arranged on the sliders 321, and the first driving assembly 400 drives the two clamping blocks 322 to move in opposite directions, thereby changing the distance between the two clamping blocks 322. Under the action of the fixing rod 323 and the mounting block 324, the first suction cup 325 is driven to move reciprocally in opposite directions, thereby changing the distance between the corresponding first suction cups 325 to complete the opening and closing of the packaging bag;

[0088] Specifically, the mounting block 324 is arranged on the fixing rod 323, at least two mounting blocks 324 are arranged on each fixing rod 323, and the distance between the mounting blocks 324 on the fixing rod 323 can be adjusted according to the actual width of the packaging bag;

[0089] At least two mounting blocks 324 are arranged on each fixing rod 323, and one suction cup is arranged on each mounting block 324, so that the adsorption points of the four first suction cups 325 form a quadrilateral, thereby ensuring the stability of the opening of the packaging bag;

[0090] Furthermore, the first suction cup 325 is adjustably arranged on the mounting block 324, so that the distance between the first suction cups 325 can be adjusted according to the thickness of the packaging bag;

[0091] Specifically, the clamping block 322 is provided with a gap for clamping the fixing rod 323. When the fixing rod 323 is arranged on the gap of the clamping block 322, the gap on the clamping block 322 is clamped by bolts and nuts, so that the fixing rod 323 is fixed on the clamping block 322. The installation of the mounting block 324 and the first suction cup 325 is the same as that of the clamping block 322 and the fixing rod 323, that is, by opening a gap on the mounting block 324 and clamping it with bolts and nuts to complete the installation. At the same time, it is convenient to adjust the distance between the mounting blocks 324 on the same fixing rod 323 to adapt to packaging bags of different widths.

[0092] As Figures 1-3 shown, in one embodiment,

[0093] The first driving assembly 400 includes:

[0094] A driving motor 410, which is installed on the bracket 100;

[0095] A turntable 420, which is arranged on the output end of the driving motor 410;

[0096] A first connecting rod 430, one end of which is arranged on the turntable 420, and the other end of the first connecting rod 430 away from the turntable 420 is arranged on one of the clamping blocks 322;

[0097] A second connecting rod 440, one end of which is arranged on the turntable 420, and the other end of the second connecting rod 440 away from the turntable 420 is arranged on the clamping block 322 far from the first connecting rod 430. When the turntable 420 rotates, the first connecting rod 430 and the second connecting rod 440 drive the two clamping blocks 322 to move reciprocally to change the distance between the two clamping blocks 322.

[0098] In this embodiment, the first connecting rod 430 and the second connecting rod 440 are respectively rotatably arranged on the turntable 420 and the two clamping blocks 322, and bearings are provided at the connection points. The length of the first connecting rod 430 is greater than that of the second connecting rod 440. When the driving motor 410 drives the turntable 420 to rotate, the turntable 420 pushes the first connecting rod 430 and at the same time pulls the second connecting rod 440, so that the two clamping blocks 322 move in opposite directions, driving the two first suction cups 325 to open, increasing the distance between the two first suction cups 325, thereby completing the opening of the packaging bag;

[0099] When the turntable 420 rotates in the reverse direction, the turntable 420 pulls the first connecting rod 430 and at the same time pushes the second connecting rod 440, so that the two clamping blocks 322 move towards each other, driving the two first suction cups 325 to close, reducing the distance between the two first suction cups 325, thereby adsorbing the next packaging bag, and then repeating the above process to open the next packaging bag.

[0100] Specifically,

[0101] The connection points of the first connecting rod 430 and the second connecting rod 440 with the turntable 420 are located on both sides of the turntable 420. The connection points of the first connecting rod 430 and the second connecting rod 440 with the turntable 420 are located on both sides of the turntable 420, so as to ensure that the first connecting rod 430 and the second connecting rod 440 are not on the same screen, and to avoid interference between the first connecting rod 430 and the second connecting rod 440 when the turntable 420 rotates;

[0102] The connection points of the first connecting rod 430 and the second connecting rod 440 with the turntable 420 are at both ends of the diameter of the turntable 420, so as to ensure that when the turntable 420 rotates, two opposite forces (thrust and pulling force) are given to the first connecting rod 430 and the second connecting rod 440, and further ensure that the two clamping blocks 322 move in opposite directions (towards each other or in different directions).

[0103] Such as Figures 1-2 and Figures 4-6 shown, in one embodiment,

[0104] The bottom bag opening assembly 200 includes:

[0105] An adjusting assembly 210, which is arranged on the bracket 100;

[0106] Two second adsorption assemblies 220, both of which are arranged on the adjusting assembly 210, and the adjusting assembly 210 adjusts the second adsorption assemblies 220 according to the size of the packaging bag;

[0107] Two second driving assemblies 230, both of which are arranged on the adjusting assembly 210, and the second driving assembly 230 controls the opening and closing of the corresponding second adsorption assembly 220.

[0108] In this embodiment, the two second adsorption assemblies 220 are arranged on the adjusting assembly 210. Through the arrangement of the adjusting assembly 210, the second adsorption assemblies 220 can be adjusted according to the length and width of the packaging bag to adapt to different sizes of packaging bags. The second driving assembly 230 drives the opening and closing of the second adsorption assemblies 220 to realize opening the packaging bag from the bottom and cooperate with the first suction cup 325 to completely open the packaging bag.

[0109] Such as Figures 1-2 and Figures 4-5 shown, in one embodiment,

[0110] The adjusting assembly 210 includes:

[0111] A fixed block 211, which is arranged on the bracket 100, and the fixed block 211 has two mounting grooves 214;

[0112] Two mounting rods 212, the two mounting rods 212 are adjustably arranged on the fixed block 211, and the two mounting rods 212 are adjustably arranged in the corresponding mounting grooves 214;

[0113] Two mounting seats 213, the two mounting seats 213 are adjustably arranged on the corresponding mounting rods 212, and two second adsorption components 220 and a second driving component 230 are respectively arranged on the corresponding mounting seats 213.

[0114] In this embodiment, the two second adsorption components 220 are respectively arranged on the two mounting seats 213, the two mounting seats 213 are arranged on the corresponding mounting rods 212, and by adjusting the height of the mounting seat 213 relative to the mounting rod 212, the height of the second adsorption component 220 relative to the first suction cup 325 can be adjusted to adapt to packages of different lengths;

[0115] The mounting rod 212 is arranged in the mounting groove 214, and by sliding the mounting rod 212 in the mounting groove 214, the distance between the two second adsorption components 220 can be changed, so as to adjust packages of different widths;

[0116] Specifically, the fixing method of the mounting seat 213 and the mounting rod 212 is the same as the mounting method of the clamping block 322 and the fixing rod 323, and both are clamped by nuts and bolts, which is convenient for adjusting the height and distance of the second adsorption component 220, so as to quickly adjust according to different models of packages.

[0117] Such as Figures 1-2 、 Figure 4 and Figure 6 shown, in an implementation manner,

[0118] The second adsorption component 220 includes:

[0119] A first clamping plate 221, the first clamping plate 221 is arranged on the mounting seat 213, and the second driving component 230 drives the first clamping plate 221 to rotate relative to the mounting seat 213;

[0120] A second clamping plate 222, the second clamping plate 222 is arranged on the mounting seat 213, and when the first clamping plate 221 rotates, the second clamping plate 222 rotates in the opposite direction following the first clamping plate 221;

[0121] Two second suction cups 223, the two second suction cups 223 are respectively arranged on the first clamping plate 221 and the second clamping plate 222.

[0122] In this embodiment, the second driving component 230 drives the first clamping plate 221 to rotate relative to the mounting base 213. When the first clamping plate 221 rotates, the second clamping plate 222 also rotates relative to the mounting base 213 along with the first clamping plate 221, so that one end of the first clamping plate 221 and the second clamping plate 222 with the second suction cup 223 moves in an arc, so that the second suction cup 223 completes the adsorption and opening of the packaging bag. After the opening is completed, the first clamping plate 221 is driven in the reverse direction, so that the second suction cup 223 adsorbs the next packaging bag, and the above actions are repeated to complete the opening of the packaging bag.

[0123] Specifically,

[0124] The second adsorption component 220 further includes:

[0125] Two gears 224 are respectively arranged on the first clamping plate 221 and the second clamping plate 222, and the two gears 224 are meshed. When the driving component drives the first clamping plate 221 to rotate, under the action of the gears 224, the second clamping plate 222 rotates in the opposite direction following the first clamping plate 221.

[0126] In this embodiment, through the arrangement of the gears 224, the first clamping plate 221 drives the second clamping plate 222 to rotate. At the same time, under the action of the gears 224, the first clamping plate 221 and the second clamping plate 222 rotate in opposite directions (one rotates clockwise and the other rotates counterclockwise) to realize the opening and closing of the first clamping plate 221 and the second clamping plate 222, so as to cooperate with the second suction cup 223 to complete the opening of the packaging bag.

[0127] As Figures 1-2 and Figure 4 shown, in one implementation,

[0128] The second driving component 230 includes:

[0129] A cylinder 231 is arranged on the mounting base 213, and the cylinder 231 drives the first clamping plate 221 to rotate relative to the mounting base 213.

[0130] In this embodiment, the cylinder 231 is rotatably arranged on the mounting base 213, and the output end of the cylinder 231 is rotatably connected to one end of the first clamping plate 221 away from the second suction cup 223. By driving the output end of the cylinder 231 to extend and retract, the first clamping plate 221 is realized to rotate with the connection point between the first clamping plate 221 and the mounting base 213 as the center of the circle.

[0131] For the functions of the modules in each device in the embodiments of the present invention, reference can be made to the corresponding descriptions in the above methods, which will not be elaborated here.

[0132] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0133] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0134] As described above, the above are only the specific implementation manners of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of various changes or substitutions, and these should all be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A bag opening device for packaging bags, characterized in that, Comprising: Bracket; Bottom bag-opening assembly, which is arranged at the bottom of the bracket and is used for opening the bottom of the packaging bag; Top bag-opening assembly, which is arranged at the top of the bracket and is used for opening the top of the packaging bag; First driving assembly, which is arranged on the bracket, and the first driving assembly drives the top bag-opening assembly to reciprocate, so as to change the distance of the top bag-opening assembly, so as to open the packaging bag.

2. The packaging bag opening device according to claim 1, wherein The top bag-opening assembly includes: Slide rail, which is arranged on the bracket; Two first adsorption assemblies, which are relatively arranged on the slide rail, and the first driving assembly drives the two first adsorption assemblies to reciprocate in opposite directions, so as to change the distance between the two first adsorption assemblies.

3. The packaging bag opening device according to claim 2, wherein The first adsorption assembly includes: Slider, which is arranged on the slide rail; Clamping block, which is arranged on the slider. When the first driving assembly drives the slider to move, the two clamping blocks reciprocate in opposite directions, so as to change the distance between the two clamping blocks; Fixed rod, which is arranged on the slider; At least two mounting blocks, and at least two of the mounting blocks are adjustably arranged on the fixed rod; First suction cup, which is arranged on the mounting block, and the first suction cup adsorbs the packaging bag.

4. The packaging bag opening device according to claim 3, wherein The first driving assembly includes: Driving motor, which is installed on the bracket; Turntable, which is arranged on the output end of the driving motor; First connecting rod, one end of which is arranged on the turntable, and the end of the first connecting rod far away from the turntable is arranged on one of the clamping blocks; Second connecting rod, one end of which is arranged on the turntable, and the end of the second connecting rod far away from the turntable is arranged on the clamping block far away from the first connecting rod. When the turntable rotates, the first connecting rod and the second connecting rod drive the two clamping blocks to reciprocate, so as to change the distance between the two clamping blocks.

5. The packaging bag opening device according to claim 4, wherein The connection points of the first connecting rod and the second connecting rod with the turntable are located on both sides of the turntable; The connection points of the first connecting rod and the second connecting rod with the turntable are on the diameter of the turntable.

6. The packaging bag opening device according to claim 4, wherein The bottom bag-opening assembly includes: Adjusting assembly, which is arranged on the bracket; Two second adsorption assemblies, and both of the two second adsorption assemblies are arranged on the adjusting assembly, and the adjusting assembly adjusts the second adsorption assemblies according to the size of the packaging bag; Two second driving components, both of the two second driving components are arranged on the adjusting component, and the second driving component controls the opening and closing of the corresponding second adsorption component.

7. The bag opening device for packaging bags according to claim 6, wherein The adjusting component includes: A fixed block, the fixed block is arranged on the bracket, and the fixed block has two mounting grooves; Two mounting rods, the two mounting rods are adjustably arranged on the fixed block, and the two mounting rods are adjustably arranged in the corresponding mounting grooves; Two mounting seats, the two mounting seats are adjustably arranged on the corresponding mounting rods, and the two second adsorption components and the second driving component are respectively arranged on the corresponding mounting seats.

8. The bag opening device for packaging bags according to claim 7, wherein The second adsorption component includes: A first clamping plate, the first clamping plate is arranged on the mounting seat, and the second driving component drives the first clamping plate to rotate relative to the mounting seat; A second clamping plate, the second clamping plate is arranged on the mounting seat, and when the first clamping plate rotates, the second clamping plate rotates in the opposite direction following the first clamping plate; Two second suction cups, the two second suction cups are respectively arranged on the first clamping plate and the second clamping plate.

9. The bag opening device for packaging bags according to claim 8, wherein The second adsorption component further includes: Two gears, the two gears are respectively arranged on the first clamping plate and the second clamping plate, the two gears are meshed, and when the driving component drives the first clamping plate to rotate, under the action of the gears, the second clamping plate rotates in the opposite direction following the first clamping plate.

10. The bag opening device for packaging bags according to claim 9, wherein The second driving component includes: A cylinder, the cylinder is arranged on the mounting seat, and the cylinder drives the first clamping plate to rotate relative to the mounting seat.

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