Bag opening device

Abstract

The utility model discloses a bag opening device, which relates to the technical field of packaging and comprises an oblique opening guide cylinder. The connecting end of the tongue piece is hinged to the bevel guide cylinder; the first driving assembly is used for driving the bevel end of the bevel guide cylinder and the tongue piece to extend into a bag opening of the packaging bag or to be pulled out of the bag opening of the packaging bag; and the second driving assembly is used for driving the tongue piece to swing so that the tongue piece and the bevel end of the bevel guide barrel can open the bag opening of the packaging bag, and the end, away from the bevel end, of the bevel guide barrel is used for communicating with the output end of the feeding device so that the multiple products conveyed by the feeding device can penetrate through the bevel guide barrel to enter the packaging bag. According to the bag opening device, the oblique-opening material guiding barrel not only plays a role in guiding materials, but also plays a role in opening the bag opening of the packaging bag, the step that the material guiding barrel stretches into the bag opening of the packaging bag is omitted, the time for completing the bagging procedure of the packaging machine is shortened, and then the packaging efficiency of the packaging machine is improved.

Description

Technical Field

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

[0002] The packaging machine is an automated device for feeding multiple products into a packaging bag and tying the packaging bag, and is mainly used for packaging multiple products. The packaging machine includes an oblique guide barrel, a feeding device and a multi-grasp opening device, and the output end of the feeding device is connected to the oblique guide barrel. When multiple products need to be fed into the packaging bag, the multiple grabs in the multi-grasp opening device will first approach the packaging bag and extend into the bag opening of the packaging bag, and then the multiple grabs will move away from each other, so that the multiple grabs will open the bag opening of the packaging bag. Then the feeding device drives the oblique guide barrel to approach the multi-grasp opening device, so that the oblique guide barrel extends into the gap between the multiple grabs and also extends into the bag opening of the packaging bag. Finally, the feeding device starts feeding, so that multiple products pass through the oblique guide barrel and enter the packaging bag to complete the bagging process of the packaging machine. After the bagging process is completed, the packaging machine will tie the bag to complete the packaging of multiple products. This bagging method requires that the oblique material guide cylinder be driven into the bag opening of the bag after the bag opening of the bag is stretched open, which increases the time for the packaging machine to complete the bagging process, and is not conducive to improving the packaging efficiency of the packaging machine. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a bag opening support device, which is conducive to improving the packaging efficiency of the packaging machine.

[0004] The bag opening device according to the embodiment of the utility model comprises:

[0005] An oblique material guide barrel, wherein the oblique end of the oblique material guide barrel is used to extend into the bag opening of the packaging bag;

[0006] A tongue, the connection end of which is hinged to the oblique material guide barrel, and the tongue can be close to the oblique end of the oblique material guide barrel, so that the free end of the tongue and the oblique end of the oblique material guide barrel form a pointed end;

[0007] A first driving assembly, the first driving assembly is used to drive the oblique end of the oblique material guide cylinder and the tongue to extend into the bag opening of the packaging bag or to be drawn out from the bag opening of the packaging bag;

[0008] The second driving component is used to drive the tongue to swing so that the tongue can move away from the oblique end of the oblique material guide barrel, and the tongue and the oblique end of the oblique material guide barrel can open the bag opening of the packaging bag. The end of the oblique material guide barrel away from the oblique end is used to be connected with the output end of the feeding device, so that multiple products conveyed by the feeding device can pass through the oblique material guide barrel and enter the packaging bag.

[0009] At least the following beneficial effects are achieved:

[0010] When the packaging machine performs the bagging process, the second drive component first drives the tongue piece to swing in the direction close to the oblique end of the oblique guide barrel, so that the tongue piece and the oblique end of the oblique guide barrel form a tip. Then the first drive component drives the oblique guide barrel and the tongue piece to approach the packaging bag sent by the handling device in the packaging machine, so that the tongue piece and the oblique end of the oblique guide barrel can extend into the bag opening of the packaging bag. Then the second drive component drives the tongue piece to swing in the direction away from the oblique end of the oblique guide barrel, so that the tongue piece begins to abut against the inner wall of the bag opening of the packaging bag. As the tongue piece continues to swing, the bag opening of the packaging bag is gradually opened, so that the tongue piece and the oblique end of the oblique guide barrel open the bag opening of the packaging bag. After the bag opening of the packaging bag is opened, the feeding device starts to convey multiple products. Since the output end of the feeding device is connected to the end of the oblique guide barrel away from the oblique end, the multiple products conveyed by the feeding device can pass through the oblique guide barrel into the packaging bag to complete the bagging process of the packaging machine. After the bagging process of the packaging machine is completed, the second driving component drives the tongue piece to approach the oblique end of the oblique material guide barrel, and the first driving component drives the tongue piece and the oblique material guide barrel away from the packaging bag, so that the tongue piece and the oblique end of the oblique material guide barrel are pulled out of the packaging bag for the next bagging process. The oblique material guide barrel in the bag opening device not only plays the role of guiding materials, but also plays the role of opening the bag mouth of the packaging bag, so that after the bag mouth of the packaging bag is opened, the feeding device can directly feed multiple products into the packaging bag through the oblique material guide barrel, eliminating the step of driving the material guide barrel to extend into the bag mouth of the packaging bag after the bag mouth of the packaging bag is opened, shortening the time for the packaging machine to complete the bagging process, thereby helping to improve the packaging efficiency of the packaging machine.

[0011] According to the bag opening supporting device of the embodiment of the utility model, the first driving assembly includes a first linear driving member, the output end of the first linear driving member is connected to the beveled material guiding cylinder, and the first linear driving member is used to drive the beveled material guiding cylinder to move along the direction of the axis of the beveled material guiding cylinder so that the beveled end of the beveled material guiding cylinder and the tongue piece are extended into the bag opening of the packaging bag or pulled out from the bag opening of the packaging bag.

[0012] According to the bag opening device of the embodiment of the utility model, the second driving assembly includes a second linear driving member, a connecting rod and a mounting seat, the oblique material guide cylinder is connected to the mounting seat, the connecting end of the tongue piece is hinged to the mounting seat, the second linear driving member is hinged to the mounting seat, one end of the second linear driving member is hinged to one end of the connecting rod, and the other end of the connecting rod is connected to the connecting end of the tongue piece, and the second linear driving member is used to drive one end of the connecting rod to swing in a direction close to or away from the oblique end of the oblique material guide cylinder, so that the tongue piece is close to or away from the oblique end of the oblique material guide cylinder.

[0013] According to the bag opening supporting device of the embodiment of the utility model, it also includes a pressing block and a third driving assembly. The gap between the pressing block and the oblique material guiding cylinder is used for allowing the bag opening of the packaging bag to extend into. The third driving assembly is used to drive the oblique material guiding cylinder to approach or move away from the pressing block, so that the pressing block and the outer wall of the oblique end of the oblique material guiding cylinder can clamp the bag opening of the packaging bag.

[0014] According to the bag opening supporting device of the embodiment of the utility model, an arc-shaped groove is opened on the side of the pressing block facing the oblique material guiding barrel, and the outer wall of the oblique end of the oblique material guiding barrel can extend into the arc-shaped groove, so that the outer wall of the oblique end of the oblique material guiding barrel and the inner wall of the arc-shaped groove can clamp the bag opening of the packaging bag.

[0015] According to the bag opening device of the embodiment of the utility model, the third driving assembly includes a third linear driving member, the output end of the third linear driving member is connected to the oblique material guide cylinder, and the third linear driving member is used to drive the oblique material guide cylinder to move in a direction perpendicular to the axis of the oblique material guide cylinder so as to make the oblique material guide cylinder approach or move away from the pressing block.

[0016] According to the bag-holding device of the embodiment of the utility model, it also includes a plurality of mounting petals, and the plurality of mounting petals are all arranged at the end of the oblique material guide barrel away from the oblique end, and the area formed by the plurality of mounting petals is connected to the oblique material guide barrel, and the area formed by the plurality of mounting petals is used for inserting the output end of the feeding device.

[0017] According to the bag opening support device of the embodiment of the utility model, the plurality of mounting petals are distributed in a circular array along the axis of the oblique-mouth material guiding cylinder.

[0018] According to the bag opening support device of the embodiment of the utility model, a plurality of the installation petals are provided with guide petals at one end away from the oblique material guiding cylinder, and the plurality of the guide petals gradually expand in a direction away from the oblique material guiding cylinder.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 This is a schematic diagram of the structure of the bag opening device according to an embodiment of the utility model;

[0022] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0023] Figure 3 for Figure 1 A partial enlarged view of point B in the middle;

[0024] Figure 4 This is a schematic structural diagram of another state of the bag opening device of an embodiment of the utility model;

[0025] Figure 5 for Figure 4 A partial enlarged view of point C in the middle;

[0026] Reference numerals:

[0027] Oblique guide barrel 100; mounting flap 110; guide flap 120; tongue 130;

[0028] A first driving assembly 200;

[0029] Second driving assembly 300; second linear driving member 310; connecting rod 320; mounting seat 330;

[0030] A third driving assembly 400;

[0031] Bracket 500 ; pressing block 510 ; arc-shaped groove 511 . DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0035] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0036] refer to Figure 1 , Figure 4 and Figure 5 The bag opening device of the utility model embodiment includes:

[0037] An oblique material guide barrel 100, wherein the oblique end of the oblique material guide barrel 100 is used to extend into the bag opening of the packaging bag;

[0038] A tongue 130, the connection end of the tongue 130 is hinged to the oblique material guide barrel 100, and the tongue 130 can be close to the oblique end of the oblique material guide barrel 100, so that the free end of the tongue 130 and the oblique end of the oblique material guide barrel 100 form a tip;

[0039] A first driving assembly 200, which is used to drive the oblique end of the oblique material guide barrel 100 and the tongue 130 to extend into the bag opening of the packaging bag or to be drawn out from the bag opening of the packaging bag;

[0040] The second driving assembly 300 is used to drive the tongue 130 to swing so that the tongue 130 can move away from the oblique end of the oblique material guiding barrel 100, and the tongue 130 and the oblique end of the oblique material guiding barrel 100 can open the bag mouth of the packaging bag. The end of the oblique material guiding barrel 100 away from the oblique end is used to be connected to the output end of the feeding device, so that multiple products conveyed by the feeding device can pass through the oblique material guiding barrel 100 and enter the packaging bag.

[0041] It is understandable that when the packaging machine performs the bagging process, the second drive assembly 300 first drives the tongue 130 to swing in the direction close to the oblique end of the oblique material guide barrel 100, so that the tongue 130 and the oblique end of the oblique material guide barrel 100 form a tip. Then the first drive assembly 200 drives the oblique material guide barrel 100 and the tongue 130 to approach the packaging bag sent by the handling device in the packaging machine, so that the tongue 130 and the oblique end of the oblique material guide barrel 100 can extend into the bag opening of the packaging bag. Then the second drive assembly 300 drives the tongue 130 to swing in the direction away from the oblique end of the oblique material guide barrel 100, so that the tongue 130 begins to abut against the inner wall of the bag opening of the packaging bag. As the tongue 130 continues to swing, the bag opening of the packaging bag is gradually opened, so that the tongue 130 and the oblique end of the oblique material guide barrel 100 open the bag opening of the packaging bag. After the bag opening of the packaging bag is opened, the feeding device starts to convey multiple products. Since the output end of the feeding device is connected to the end of the oblique material guide cylinder 100 away from the oblique end, the multiple products conveyed by the feeding device can pass through the oblique material guide cylinder 100 into the packaging bag to complete the bagging process of the packaging machine. After the bagging process of the packaging machine is completed, the second driving component 300 drives the tongue piece 130 to approach the oblique end of the oblique material guide cylinder 100, and the first driving component 200 drives the tongue piece 130 and the oblique material guide cylinder 100 away from the packaging bag, so that the tongue piece 130 and the oblique end of the oblique material guide cylinder 100 are drawn out of the packaging bag for the next bagging process. The oblique material guiding cylinder 100 in the bag opening supporting device not only plays the role of guiding materials, but also plays the role of supporting the bag opening, so that after the bag opening of the packaging bag is supported, the feeding device can directly feed multiple products into the packaging bag through the oblique material guiding cylinder 100, eliminating the step of driving the material guiding cylinder to extend into the bag opening of the packaging bag after the bag opening of the packaging bag is supported, thereby shortening the time for the packaging machine to complete the bagging process, and thus helping to improve the packaging efficiency of the packaging machine.

[0042] refer to Figure 2 and Figure 5 In the present invention, the oblique material guide pipe is a material guide pipe with an oblique opening, the cross-sectional area of ​​the oblique end of the oblique material guide pipe gradually decreases in the direction away from the other end of the oblique material guide pipe, and the diameter of the oblique material guide pipe is larger than the diameter of the product.

[0043] refer to Figure 1 and Figure 4The first driving assembly 200 includes a first linear driving member, the output end of which is connected to the oblique material guide barrel 100, and the first linear driving member is used to drive the oblique material guide barrel 100 to move along the axial direction of the oblique material guide barrel 100, so that the oblique end of the oblique material guide barrel 100 and the tongue 130 extend into the bag opening of the packaging bag or are pulled out from the bag opening of the packaging bag. It can be understood that after the tongue 130 approaches the oblique end of the oblique material guide barrel 100, the free end of the tongue 130 and the oblique end of the oblique material guide barrel 100 form a tip. When the bagging process is performed, the first linear driving member drives the oblique material guide barrel 100 to move along the direction of its own axis and approach the packaging bag. Under the action of the formed tip, the free end of the tongue 130 and the oblique end of the oblique material guide barrel 100 can easily enter the bag opening of the packaging bag that has not yet been opened.

[0044] refer to Figure 1 and Figure 4 The second drive assembly 300 includes a second linear drive member 310, a connecting rod 320 and a mounting seat 330. The oblique guide cylinder 100 is connected to the mounting seat 330. The connecting end of the tongue piece 130 is hinged to the mounting seat 330. The second linear drive member 310 is hinged to the mounting seat 330. The output end of the second linear drive member 310 is hinged to one end of the connecting rod 320. The other end of the connecting rod 320 is connected to the connecting end of the tongue piece 130. The second linear drive member 310 is used to drive one end of the connecting rod 320 to swing toward or away from the oblique end of the oblique guide cylinder 100, so as to make the tongue piece 130 approach or away from the oblique end of the oblique guide cylinder 100. It can be understood that the connecting end of the tongue piece 130 is hinged to the mounting seat 330, and the oblique guide cylinder 100 is connected to the mounting seat 330, that is, the connecting end of the tongue piece 130 is hinged to the oblique guide cylinder through the mounting seat 330. The output end of the second linear drive member 310 is hinged to one end of the connecting rod 320, and the other end of the connecting rod 320 is connected to the connecting end of the tongue piece 130, so that one end of the connecting rod 320 can swing relative to the hinge between the tongue piece 130 and the mounting seat 330. When it is necessary to make the tongue piece 130 close to the oblique end of the oblique material guiding barrel 100, the second linear driving member 310 drives one end of the connecting rod 320 to swing towards the direction close to the oblique end of the oblique material guiding barrel 100, and under the drive of the connecting rod 320, the tongue piece 130 approaches the oblique end of the oblique material guiding barrel 100; when it is necessary to make the tongue piece 130 away from the oblique end of the oblique material guiding barrel 100 and open the bag opening of the packaging bag, the second linear driving member 310 drives one end of the connecting rod 320 to swing towards the direction away from the oblique end of the oblique material guiding barrel 100, and under the drive of the connecting rod 320, the tongue piece 130 away from the oblique end of the oblique material guiding barrel 100 and open the bag opening of the packaging bag.

[0045] refer to Figure 1The bag opening device further includes a pressing block 510 and a third driving assembly 400. The gap between the pressing block 510 and the oblique material guide cylinder 100 is used for the bag opening of the packaging bag to extend therein. The third driving assembly 400 is used to drive the oblique material guide cylinder 100 to approach or move away from the pressing block 510, so that the pressing block 510 and the outer wall of the oblique material guide cylinder 100 can clamp the bag opening of the packaging bag. It can be understood that when the packaging machine performs the bagging process, the second driving assembly 300 first drives the tongue piece 130 to swing toward the oblique end of the oblique material guide cylinder 100, so that the tongue piece 130 and the oblique end of the oblique material guide cylinder 100 form a tip. Then the handling device in the packaging machine drives the packaging bag to approach the oblique material guide cylinder 100, the tongue piece 130 and the pressing block 510, so that the bag opening of the packaging bag is above the pressing block 510. Then the first driving assembly 200 drives the oblique material guide barrel 100 and the tongue 130 to approach the packaging bag, so that the tongue 130 and the oblique end of the oblique material guide barrel 100 can extend into the bag opening of the packaging bag. At this time, the bag opening of the packaging bag is arranged in the gap between the pressing block 510 and the oblique material guide barrel 100.

[0046] Then, the second driving assembly 300 drives the tongue piece 130 to swing away from the oblique end of the oblique material guide barrel 100, so that the tongue piece 130 and the oblique end of the oblique material guide barrel 100 open the bag opening of the packaging bag. At the same time, the third driving assembly 400 drives the oblique material guide barrel 100 to approach the pressing block 510, so that the outer wall of the oblique end of the oblique material guide barrel 100 and the pressing block 510 clamp the bag opening of the packaging bag. Finally, the feeding device starts to convey multiple products to complete the bagging process of the packaging machine. After the bagging process of the packaging machine is completed, the second driving assembly 300 drives the tongue 130 to approach the oblique end of the oblique material guide barrel 100, and the third driving assembly 400 drives the oblique material guide barrel 100 away from the pressing block 510, so that the outer wall of the pressing block 510 and the oblique end of the oblique material guide barrel 100 loosens the bag opening of the packaging bag, and the first driving assembly 200 drives the tongue 130 and the oblique material guide barrel 100 away from the packaging bag, so that the tongue 130 and the oblique end of the oblique material guide barrel 100 are withdrawn from the packaging bag for the next bagging process. In the process of the feeding device conveying multiple products into the packaging bag, the pressing block 510 and the oblique material guide barrel 100 can clamp the bag opening of the packaging bag, effectively preventing the bag opening of the packaging bag from shaking during the bagging process, and improving the bagging stability of multiple products.

[0047] As an embodiment of the utility model, the third driving assembly 400 includes a third linear driving member, the output end of the third linear driving member is connected to the beveled material guide barrel 100, and the third linear driving member is used to drive the beveled material guide barrel 100 to move in a direction perpendicular to the axis of the beveled material guide barrel 100 so as to make the beveled material guide barrel 100 approach or move away from the pressing block 510.

[0048] refer to Figure 1 and Figure 2The side of the pressing block 510 facing the oblique material guide barrel 100 is provided with an arc groove 511, and the outer wall of the oblique end of the oblique material guide barrel 100 can extend into the arc groove 511, so that the outer wall of the oblique end of the oblique material guide barrel 100 and the inner wall of the arc groove 511 can clamp the bag opening of the packaging bag. It can be understood that the outer wall of the oblique end of the oblique material guide barrel 100 can extend into the arc groove 511, that is, the outer wall of the oblique end of the oblique material guide barrel 100 and the inner wall of the arc groove 511 can clamp the bag opening of the packaging bag. The pressing block 510 abuts against the bag opening of the packaging bag through the inner wall of the arc groove 511, which increases the contact area between the pressing block 510 and the bag opening of the packaging bag, and improves the stability of the pressing block 510 and the oblique material guide barrel 100 clamping the bag opening of the packaging bag.

[0049] refer to Figure 1 and Figure 3 The bag opening device also includes a plurality of mounting petals 110, which are all arranged at one end of the oblique material guide barrel 100 away from the oblique end. The area formed by the plurality of mounting petals 110 is connected to the oblique material guide barrel 100, and the area formed by the plurality of mounting petals 110 is used for the output end of the feeding device to be inserted. It can be understood that the output end of the feeding device can be inserted into the area formed by the plurality of mounting petals 110. When the feeding device is started, the plurality of products conveyed by the feeding device can first enter the area formed by the plurality of mounting petals 110, and then enter the oblique material guide barrel 100. On the other hand, after the output end of the feeding device is inserted into the area formed by the plurality of mounting petals 110, the plurality of mounting petals 110 can move relative to the output end of the feeding device. As an embodiment of the utility model, the plurality of mounting petals 110 are distributed in a circular array along the axis of the oblique material guide barrel 100.

[0050] refer to Figure 3 The ends of the plurality of mounting petals 110 away from the oblique material guide cylinder 100 are all provided with guide petals 120, and the plurality of guide petals 120 gradually expand in the direction away from the oblique material guide cylinder 100. It can be understood that the plurality of guide petals 120 guide the output end of the feeding device so that the output end of the feeding device can be smoothly inserted into the area surrounded by the plurality of mounting petals 110.

[0051] In the utility model, the bag opening device further includes a bracket 500, the bracket 500 is used to be connected to the body of the packaging machine, and the pressure block 510 is connected to the bracket 500. The first linear drive member, the second linear drive member 310 and the third linear drive member are respectively the first cylinder, the second cylinder and the third cylinder. The cylinder body of the first cylinder is connected to the bracket 500, the piston rod of the first cylinder is connected to the cylinder body of the third cylinder, the piston rod of the third cylinder is connected to the mounting seat 330, the oblique guide cylinder 100 is connected to the mounting seat 330, and the tongue 130 is hinged to the mounting seat 330. The cylinder body of the second cylinder is hinged to the mounting seat 330, and the piston rod of the second cylinder is hinged to one end of the connecting rod 320.

[0052] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] Of course, the present invention is not limited to the above-mentioned embodiments, and technicians familiar with the field may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A bag opening device, characterized in that: include: An oblique material guide barrel, wherein the oblique end of the oblique material guide barrel is used to extend into the bag opening of the packaging bag; A tongue, the connection end of which is hinged to the oblique material guide barrel, and the tongue can be close to the oblique end of the oblique material guide barrel, so that the free end of the tongue and the oblique end of the oblique material guide barrel form a pointed end; A first driving assembly, the first driving assembly is used to drive the oblique end of the oblique material guide cylinder and the tongue to extend into the bag opening of the packaging bag or to be drawn out from the bag opening of the packaging bag; The second driving component is used to drive the tongue to swing so that the tongue can move away from the oblique end of the oblique material guide barrel, and the tongue and the oblique end of the oblique material guide barrel can open the bag opening of the packaging bag. The end of the oblique material guide barrel away from the oblique end is used to be connected with the output end of the feeding device, so that multiple products conveyed by the feeding device can pass through the oblique material guide barrel and enter the packaging bag.

2. The bag opening device according to claim 1, characterized in that: The first driving assembly includes a first linear driving member, the output end of which is connected to the beveled material guide barrel, and the first linear driving member is used to drive the beveled material guide barrel to move along the direction of the axis of the beveled material guide barrel so that the beveled end of the beveled material guide barrel and the tongue piece extend into the bag opening of the packaging bag or are pulled out from the bag opening of the packaging bag.

3. The bag opening device according to claim 1, characterized in that: The second driving assembly includes a second linear driving member, a connecting rod and a mounting seat, the beveled material guide cylinder is connected to the mounting seat, the connecting end of the tongue piece is hinged to the mounting seat, the second linear driving member is hinged to the mounting seat, one end of the second linear driving member is hinged to one end of the connecting rod, and the other end of the connecting rod is connected to the connecting end of the tongue piece, and the second linear driving member is used to drive one end of the connecting rod to swing in a direction close to or away from the beveled end of the beveled material guide cylinder, so that the tongue piece is close to or away from the beveled end of the beveled material guide cylinder.

4. The bag opening device according to claim 1, characterized in that: It also includes a pressing block and a third driving assembly. The gap between the pressing block and the oblique material guide barrel is used for the bag mouth of the packaging bag to extend into. The third driving assembly is used to drive the oblique material guide barrel to approach or move away from the pressing block, so that the pressing block and the outer wall of the oblique end of the oblique material guide barrel can clamp the bag mouth of the packaging bag.

5. The bag opening device according to claim 4, characterized in that: An arc groove is formed on the side of the pressing block facing the oblique material guide barrel, and the outer wall of the oblique end of the oblique material guide barrel can extend into the arc groove, so that the outer wall of the oblique end of the oblique material guide barrel and the inner wall of the arc groove can clamp the bag opening of the packaging bag.

6. The bag opening device according to claim 4, characterized in that: The third driving assembly includes a third linear driving member, the output end of which is connected to the oblique material guide cylinder, and the third linear driving member is used to drive the oblique material guide cylinder to move in a direction perpendicular to the axis of the oblique material guide cylinder so that the oblique material guide cylinder is close to or away from the pressing block.

7. The bag opening device according to claim 1, characterized in that: It also includes a plurality of mounting petals, which are all arranged at one end of the oblique material guide barrel away from the oblique end, the area formed by the plurality of mounting petals is connected to the oblique material guide barrel, and the area formed by the plurality of mounting petals is used for inserting the output end of the feeding device.

8. The bag opening device according to claim 7, characterized in that: The plurality of mounting petals are distributed in an array along the circumference of the axis of the oblique-mouth material guide barrel.

9. The bag opening device according to claim 7, characterized in that: A plurality of the installation flaps are each provided with a guide flap at one end away from the oblique material guiding cylinder, and the guide flaps gradually expand in a direction away from the oblique material guiding cylinder.

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