Self-sealing packaging bag opening mechanism
By designing the clamping and opening mechanism of the self-sealed packaging bag, the automatic bag opening of the packaging bag is realized, solving the problems of low efficiency and safety hazards of manual bag opening, improving work efficiency and saving labor costs.
Patent Information
- Application Number
- CN202421376009.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-17
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-06-17
AI Technical Summary
Self-sealed packaging bags need to be opened manually before filling, resulting in low work efficiency and safety risks.
A self-sealing packaging bag bag opening mechanism is designed, including a clamping mechanism and a propelling mechanism. The clamping mechanism clamps or releases the packaging bag through the relative movement of the first clamp and the second clamp. The propelling mechanism is inserted downwardly through the first clamp and the second clamp and prys open the self-sealing mouth of the packaging bag upward.
Automatic bag opening of packaging bags is realized, which improves work efficiency, saves labor costs, and reduces safety hazards caused by human operation.
Smart Images
Figure CN222793954U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of filling, in particular to a bag opening mechanism for a self-sealing packaging bag. Background Art
[0002] With the improvement of living standards, product packaging has become more and more diversified. Packaging bags are also a common way of packaging. Packaging bags with self-sealing mouths are popular among people because of their advantage of being able to be sealed at any time. With the advancement of technology, the work of filling products into packaging bags has gradually progressed from manual filling to intelligent equipment filling. However, the self-sealing mouth of the self-sealing packaging bag is sealed before filling, and it is necessary to manually open the self-sealing mouth of the packaging bag and put it on the filling work line, which leads to slow work efficiency and some safety problems due to human negligence. Therefore, the development of an efficient bag opening mechanism for a self-sealing packaging bag filling machine is a technical problem that we need to solve. Utility Model Content
[0003] Based on this, it is necessary to provide a self-sealing packaging bag opening mechanism to address the problem that the self-sealing mouth of the self-sealing packaging bag in the prior art is in a sealed state before filling, and the self-sealing mouth of the packaging bag needs to be opened manually and placed on the filling work line, which leads to slow work efficiency.
[0004] Therefore, the present application provides a self-sealing packaging bag opening mechanism, which is used to open the self-sealing mouth of the packaging bag before filling. The bag opening mechanism includes a clamping mechanism 100 and a stretching mechanism 200. The clamping mechanism 100 includes a first clamping plate 110 and a second clamping plate 120 that are relatively arranged. The first clamping plate 110 and the second clamping plate 120 can be driven by an external force to approach each other to clamp the packaging bag, or move away from each other to loosen the packaging bag. The stretching mechanism 200 is arranged above the clamping mechanism 100. The stretching mechanism 200 includes a first support claw 210 and a second support claw 220 that are relatively arranged. The first support claw 210 and the second support claw 220 can be driven by an external force to move downward at the same time to penetrate into the packaging bag, and move upward away from the packaging bag.
[0005] In some embodiments, the clamping mechanism 100 also includes a first rack 130 for supporting the first clamp plate 110 and the second clamp plate 120, the first rack 130 can slide through the fixed plate 300, and the first rack 130 has a first end 131 and a second end 132 located on both sides of the fixed plate 300, the first clamp plate 110 is fixedly mounted on the first end 131, a first support plate 310 is provided above the second end 132, and a rotatable gear 140 is provided below the first support plate 310, and the first rack 130 is transmission connected to the gear 140.
[0006] In some embodiments, a first driving device 150 for driving the gear 140 to rotate is disposed above the first support plate 310 , and the first driving device 150 is drivingly connected to the gear 140 , wherein the first driving device 150 is a rotary cylinder.
[0007] In some embodiments, the second clamp plate 120 can be slidably mounted on the first rack 130 at a position close to the first end 131, and a second rack 160 is fixedly connected to the side of the second clamp plate 120 facing away from the first clamp plate 110, and the second rack 160 can slide through the fixed plate 300, and the second rack 160 has a third end 161 and a fourth end 162 located on both sides of the fixed plate 300, and the third end 161 is fixedly connected to the second clamp plate 120, and the second rack 160 is transmission connected to the gear 140.
[0008] In some embodiments, a claw mounting plate 250 is provided above the first clamping plate 110 and the second clamping plate 120, and a support frame 320 is installed on the side of the fixed plate 300 facing the first end 131 of the first rack 130, and the claw mounting plate 250 is slidably installed on the support frame 320, and a second driving device 260 for driving the claw mounting plate 250 to move up and down is also installed on the support frame 320, wherein the second driving device 260 is a telescopic cylinder.
[0009] In some embodiments, the first sliding plate 230 and the second sliding plate 240 can be slidably mounted on the claw mounting plate 250, the first sliding plate 230 is fixedly connected to the first clamping plate 110, the second sliding plate 240 is fixedly connected to the second clamping plate 120, the first claw 210 is mounted on the first sliding plate 230, and the second claw 220 is mounted on the second sliding plate 240.
[0010] In some embodiments, the first sliding plate 230 and the second sliding plate 240 are both L-shaped sliding plates, a third driving device 231 is provided at the top of the first sliding plate 230, and a fourth driving device 241 is provided at the top of the second sliding plate 240. The middle part of the first claw 210 and the free end of the L-shaped bottom of the first sliding plate 230 are rotatably connected to the first hinge point 211, and the top of the first claw 210 is rotatably connected to the third driving device 231, and the third driving device 231 is used to drive the first claw 210 to rotate around the first hinge point 211, the middle part of the second claw 220 and the free end of the L-shaped bottom of the second sliding plate 240 are rotatably connected to the second hinge point 221, and the top of the second claw 220 is rotatably connected to the fourth driving device 241, and the fourth driving device 241 is used to drive the second claw 220 to rotate around the second hinge point 221, and the third driving device 231 and the fourth driving device 241 are both telescopic cylinders.
[0011] In some embodiments, the first claw 210 and the second claw 220 are both curved, and the bottoms of the first claw 210 and the second claw 220 are both sharp knife-shaped.
[0012] In some embodiments, two flexible suction cups 270 are installed on the opposite surfaces of the first clamping plate 110 and the second clamping plate 120, the first claw 210 is located between the two suction cups 270 on the first clamping plate 110, and the bottom of the second claw 220 is located between the two suction cups 270 on the second clamping plate 120.
[0013] The utility model provides a bag opening mechanism for a self-sealing packaging bag, which has the following technical effects: the bag opening mechanism for a self-sealing packaging bag filling machine in the utility model has a high degree of automation, saves labor costs, and greatly improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0015] Figure 1 It is an installation schematic diagram of the utility model.
[0016] Figure 2 It is a schematic diagram of the overall structure of the utility model.
[0017] Figure 3 It is a side view of the clamping mechanism structure of the utility model.
[0018] Figure 4 It is a schematic diagram of the gear position structure of the utility model.
[0019] Figure 5 It is a schematic diagram of the structure of the propping mechanism of the utility model.
[0020] Figure 6 It is a schematic diagram of the position structure of the support claw mounting plate of the utility model.
[0021] Figure 7 It is a schematic diagram of the state before the supporting claws of the utility model are inserted into the packaging bag.
[0022] Figure 8 It is a schematic diagram of the state in which the supporting claws of the utility model pry open the self-sealing opening of the packaging bag.
[0023] Fig. 9 It is a schematic diagram of the state when the packaging bag of the utility model is opened and sealed.
[0024] Explanation of the accompanying drawings: clamping mechanism 100, opening mechanism 200, first clamping plate 110, second clamping plate 120, first support claw 210, second support claw 220, first rack 130, first end 131, second end 132, first support plate 310, gear 140, first drive device 150, second rack 160, third end 161, fourth end 162, support claw mounting plate 250, support frame 320, second drive device 260, first sliding plate 230, second sliding plate 240, third drive device 231, fourth drive device 241, first hinge point 211, second hinge point 221, suction cup 270. DETAILED DESCRIPTION
[0025] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.
[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "liquid level", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0028] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0029] In the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher liquid level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower liquid level than the second feature.
[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "liquid horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.
[0031] An embodiment of the utility model provides a self-sealing packaging bag opening mechanism, which is used for opening the locked self-sealing mouth of the packaging bag before a filling machine fills the product into the packaging bag with the self-sealing mouth. The whole bag opening process has a high degree of automation, thereby achieving the purpose of saving manpower and improving work efficiency.
[0032] See also Figure 1 , Figure 1 The figure shows an overall structural installation diagram of a bag opening mechanism in an embodiment of the present application, including a clamping mechanism 100 for clamping a packaging bag and an opening mechanism 200 for opening a bag mouth. Both the clamping mechanism 100 and the opening mechanism 200 are fixedly mounted on a fixed plate 300. The fixed plate 300 can be mounted on a filling machine frame or on a frame separately arranged on the ground. A first support plate 310 for mounting the clamping mechanism 100 is provided on one side of the fixed plate 300, and a support frame 320 for mounting the opening mechanism 200 is provided on the other side.
[0033] See also Figure 2 and Figure 5 The clamping mechanism 100 includes a first clamping plate 110 and a second clamping plate 120 that are arranged opposite to each other. The first clamping plate 110 and the second clamping plate 120 can be driven by an external force to move closer to each other to clamp the packaging bag, or move away from each other to loosen the packaging bag. The opening mechanism 200 includes a first support claw 210 and a second support claw 220 that are arranged opposite to each other. The first support claw 210 and the second support claw 220 can be driven by an external force to move downward at the same time to penetrate into the packaging bag, and move upward at the same time to move away from the packaging bag.
[0034] See also Figure 4 The clamping mechanism 100 also includes a first rack 130 for carrying the first clamping plate 110 and the second clamping plate 120. The first rack 130 can slide through the fixed plate 300, and the first rack 130 has a first end 131 and a second end 132 located on both sides of the fixed plate 300. The first clamping plate 110 is fixedly installed on the first end 131, and a first support plate 310 is provided above the second end 132. A rotatable gear 140 is provided below the first support plate 310, and the first rack 130 is transmission-connected to the gear 140.
[0035] See also Figures 2 to 3 The second clamping plate 120 can be slidably installed on the first rack 130 at a position close to the first end 131. The second rack 160 is fixedly connected to the side of the second clamping plate 120 facing away from the first clamping plate 110. The second rack 160 can slide through the fixed plate 300. The second rack 160 has a third end 161 and a fourth end 162 located on both sides of the fixed plate 300. The third end 161 is fixedly connected to the second clamping plate 120. The second rack 160 is transmission connected to the gear 140.
[0036] A first driving device 150 for driving the gear 140 to rotate is disposed above the first supporting plate 310 , and the first driving device 150 is in transmission connection with the gear 140 .
[0037] When the packaging bag is placed between the first clamping plate 110 and the second clamping plate 120, when the gear 140 rotates counterclockwise around the Y axis, the gear 140 drives the first rack 130 to move along the X axis to the negative direction of the X axis, and the first rack 130 pulls the first clamping plate 110 close to the fixed plate 300. At the same time, the gear 140 drives the second rack 160 to move along the X axis to the positive direction of the X axis, and the second rack 160 pushes the second clamping plate 120 away from the fixed plate 300. At this time, the first clamping plate 110 and the second clamping plate 120 approach each other until the packaging bag is clamped to stabilize the packaging bag and move to the bottom of the opening mechanism 200. The stretching mechanism 200 performs the bag opening work; when the self-sealing mouth of the packaging bag is opened, the gear 140 rotates clockwise around the Y-axis, and the gear 140 drives the first rack 130 to move along the X-axis to the positive direction of the X-axis, and the first rack 130 drives the first clamping plate 110 away from the fixed plate 300. At the same time, the gear 140 drives the second rack 160 to move along the X-axis to the negative direction of the X-axis, and the second rack 160 drives the second clamping plate 120 close to the fixed plate 300. At this time, the first clamping plate 110 and the second clamping plate 120 gradually move away from each other to provide space for the stretching mechanism 200 to open the self-sealing mouth of the packaging bag.
[0038] See also Figures 4 to 5 , a claw mounting plate 250 is provided above the first clamping plate 110 and the second clamping plate 120, a support frame 320 is installed on the side of the fixing plate 300 facing the first end portion 131 of the first rack 130, and the claw mounting plate 250 can be slidably installed on the support frame 320 up and down. Specifically, the claw mounting plate 250 can be slidably installed on the support frame 320 by cooperating with the slide groove and the slide bar, and a second driving device 260 for driving the claw mounting plate 250 to move up and down is also installed on the support frame 320. The second driving device 260 drives the claw mounting plate 250 to move up and down, drives the first sliding plate 230 and the second sliding plate 240 to move up and down, and then drives the first claw 210 and the second claw 220 to move up and down, the first claw 210 and the second claw 220 move downward so that the knife-shaped bottom inserts the self-sealing mouth of the packaging bag and extends into the packaging bag, the first claw 210 and the second claw 220 move downward and come out of the packaging bag so that the packaging bag can be moved horizontally to the next process.
[0039] The first sliding plate 230 and the second sliding plate 240 can be slidably mounted on the claw mounting plate 250. Specifically, the first sliding plate 230 and the second sliding plate 240 can be slidably mounted on the claw mounting plate 250 by means of a sliding groove and a sliding bar. The first sliding plate 230 is fixedly connected to the first clamping plate 110, and the second sliding plate 240 is fixedly connected to the second clamping plate 120. The first claw 210 is mounted on the first sliding plate 230, and the second claw 220 is mounted on the second sliding plate 240. When the first clamping plate 110 and the second clamping plate 120 are close to or away from each other, the first claw 210 and the second claw 220 are driven to close or open.
[0040] See also Figure 5 , the first sliding plate 230 and the second sliding plate 240 are both L-shaped sliding plates, a third driving device 231 is provided at the top of the first sliding plate 230, and a fourth driving device 241 is provided at the top of the second sliding plate 240. The middle part of the first claw 210 and the free end of the L-shaped bottom of the first sliding plate 230 are rotatably connected to the first hinge point 211, and the top of the first claw 210 is rotatably connected to the third driving device 231, and the third driving device 231 is used to drive the first claw 210 to rotate around the first hinge point 211, the middle part of the second claw 220 and the free end of the L-shaped bottom of the second sliding plate 240 are rotatably connected to the second hinge point 221, and the top of the second claw 220 is rotatably connected to the fourth driving device 241, and the fourth driving device 241 is used to drive the second claw 220 to rotate around the second hinge point 221.
[0041] In some embodiments, the first claw 210 and the second claw 220 are both curved, and the bottoms of the first claw 210 and the second claw 220 are both sharp knife-shaped. When the first claw 210 and the second claw 220 extend into the self-sealing opening of the packaging bag, the third driving device 231 drives the first claw 210 to rotate around the first hinge point 211, and the fourth driving device 241 drives the second claw 220 to rotate around the second hinge point 221, so that the bottoms of the first claw 210 and the second claw 220 are changed from the Y-shaped state of being together to the X-shaped state of being separated, as shown in the figure. At this time, the first claw 210 and the second claw 220 expand the opening of the self-sealing opening of the packaging bag, the first clamp 110 and the second clamp 120 are separated and moved away from each other, and then the suction cups 270 on the first clamp 110 and the second clamp 120 suck the two sides of the packaging bag to open the sealing of the packaging bag.
[0042] In order to make the first clamping plate 110 and the second clamping plate 120 clamp the packaging bag more firmly and prevent the packaging bag from falling off under the push of the first claw 210 and the second claw 220 when the first claw 210 and the second claw 220 move downward to pry open the self-sealing mouth of the packaging bag, two flexible suction cups 270 are installed on the opposite surfaces of the first clamping plate 110 and the second clamping plate 120. Figure 2As shown in , the packaging bag is tightly clamped by the oppositely arranged suction cups 270 , the first claw 210 is located between the two suction cups 270 on the first clamping plate 110 , and the bottom of the second claw 220 is located between the two suction cups 270 on the second clamping plate 120 .
[0043] It should be noted that the first driving device 150 may be a rotary cylinder or a rotary motor, and the second driving device 260 , the third driving device 231 , and the fourth driving device 241 may be an electric telescopic rod or a telescopic cylinder.
[0044] A self-sealing packaging bag opening mechanism provided in the present application also includes a control unit, in which a control strategy is arranged. The control unit sends control instructions to the first drive device 150, the second drive device 260, the third drive device 231 and the fourth drive device 241 according to the control strategy, and the first drive device 150, the second drive device 260, the third drive device 231 and the fourth drive device 241 perform work according to the received control instructions.
[0045] During operation, the bottom of the first claw 210 and the second claw 220 are located above the suction cup 270, and the first driving device 150 is controlled to drive the first clamping plate 110 and the second clamping plate 120 to move closer to each other, so that the packaging bag is placed between the first clamping plate 110 and the second clamping plate 120, and the first clamping plate 110 and the second clamping plate 120 clamp the packaging bag so that it does not fall off. At this time, the first claw 210 and the second claw 220 are also closed under the drive of the first clamping plate 110 and the second clamping plate 120, and after closing, the bottom of the first claw 210 and the second claw 220 are as follows: Figure 7 The Y-shaped packaging bag shown in the figure is provided with a second driving device 260, which drives the first claw 210 and the second claw 220 to move downward, so that the sharp knife-shaped bottom inserts the self-sealing opening of the packaging bag and extends into the packaging bag, and the third driving device 231 is controlled to drive the first claw 210 to rotate around the first hinge point 211, and the fourth driving device 241 is controlled to drive the second claw 220 to rotate around the second hinge point 221, as shown in the figure. Figure 8 As shown, the bottoms of the first claw 210 and the second claw 220 are changed from the Y-shaped state to the separated X-shaped state, and the self-sealing opening of the packaging bag is enlarged. At this time, the claws and the corresponding clamps clamp the corresponding layers of the packaging bag, and the first driving device 150 is controlled to drive the first clamp 110 and the second clamp 120 to move away from each other, and at the same time drive the first claw 210 and the second claw 220 to move away from each other. The two sides of the packaging bag are separated under the clamping force of the claws and the clamps and the suction of the suction cup 270, as shown in FIG. Fig. 9 As shown, the seal of the packaging bag is gradually opened to the maximum, the first driving device 150, the second driving device 260, the third driving device 231 and the fourth driving device 241 are controlled to reset, and the packaging bag is then transported to the next process through the conveying device.
[0046] The utility model provides a self-sealing packaging bag opening mechanism, which has the following technical effects: the overall automation degree is high, the labor cost is saved, and the work efficiency is greatly improved.
[0047] The above description is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.
Claims
1. A self-sealing packaging bag opening mechanism, used to open the self-sealing packaging bag before filling, characterized in that: The bag opening mechanism comprises a clamping mechanism (100) and an opening mechanism (200), wherein the clamping mechanism (100) comprises a first clamping plate (110) and a second clamping plate (120) which are arranged opposite to each other, and the first clamping plate (110) and the second clamping plate (120) can move closer to each other to clamp the packaging bag or move away from each other to loosen the packaging bag under the driving of an external force, and the opening mechanism (200) is arranged above the clamping mechanism (100), and the opening mechanism (200) comprises a first supporting claw (210) and a second supporting claw (220) which are arranged opposite to each other, and the first supporting claw (210) and the second supporting claw (220) can simultaneously move downward to penetrate into the packaging bag and simultaneously move upward to move away from the packaging bag under the driving of an external force.
2. A self-sealing packaging bag opening mechanism according to claim 1, characterized in that: The clamping mechanism (100) further comprises a first rack (130) for carrying the first clamping plate (110) and the second clamping plate (120); the first rack (130) can slide through the fixed plate (300), and the first rack (130) has a first end (131) and a second end (132) located on both sides of the fixed plate (300); the first clamping plate (110) is fixedly mounted on the first end (131); a first support plate (310) is provided above the second end (132); a rotatable gear (140) is provided below the first support plate (310); and the first rack (130) is transmission-connected to the gear (140).
3. A self-sealing packaging bag opening mechanism according to claim 2, characterized in that: A first driving device (150) for driving the gear (140) to rotate is provided above the first supporting plate (310); the first driving device (150) is transmission-connected to the gear (140); the first driving device (150) is a rotating cylinder.
4. The self-sealing packaging bag opening mechanism according to claim 2, characterized in that: The second clamping plate (120) can be slidably mounted on a position of the first rack (130) near the first end (131); a second rack (160) is fixedly connected to the side of the second clamping plate (120) facing away from the first clamping plate (110); the second rack (160) can be slidably passed through the fixed plate (300); the second rack (160) has a third end (161) and a fourth end (162) located on both sides of the fixed plate (300); the third end (161) is fixedly connected to the second clamping plate (120); and the second rack (160) is transmission-connected to the gear (140).
5. The self-sealing packaging bag opening mechanism according to claim 2, characterized in that: A claw mounting plate (250) is provided above the first clamping plate (110) and the second clamping plate (120); a support frame (320) is installed on one side of the fixing plate (300) facing the first end portion (131) of the first rack (130); the claw mounting plate (250) is slidably mounted on the support frame (320) up and down; a second driving device (260) for driving the claw mounting plate (250) to move up and down is also installed on the support frame (320); the second driving device (260) is a telescopic cylinder.
6. A self-sealing packaging bag opening mechanism according to claim 5, characterized in that: A first sliding plate (230) and a second sliding plate (240) are slidably mounted on the claw mounting plate (250); the first sliding plate (230) is fixedly connected to the first clamping plate (110); the second sliding plate (240) is fixedly connected to the second clamping plate (120); the first claw (210) is mounted on the first sliding plate (230); and the second claw (220) is mounted on the second sliding plate (240).
7. A self-sealing packaging bag opening mechanism according to claim 6, characterized in that: The first sliding plate (230) and the second sliding plate (240) are both L-shaped sliding plates, a third driving device (231) is disposed at the top end of the first sliding plate (230), a fourth driving device (241) is disposed at the top end of the second sliding plate (240), a middle portion of the first claw (210) and a free end of the L-shaped bottom of the first sliding plate (230) are rotatably connected to a first hinge point (211), and a top end of the first claw (210) is rotatably connected to the third driving device (231), and the third driving device (231) The first support claw (210) is used to drive the first support claw (210) to rotate around the first hinge point (211), the middle part of the second support claw (220) and the free end of the L-shaped bottom of the second sliding plate (240) are rotatably connected to the second hinge point (221), and the top end of the second support claw (220) is rotatably connected to the fourth drive device (241), and the fourth drive device (241) is used to drive the second support claw (220) to rotate around the second hinge point (221), and the third drive device (231) and the fourth drive device (241) are both telescopic cylinders.
8. The self-sealing packaging bag opening mechanism according to claim 1, characterized in that: The first claw (210) and the second claw (220) are both curved, and the bottoms of the first claw (210) and the second claw (220) are both sharp knife-shaped.
9. The self-sealing packaging bag opening mechanism according to claim 1, characterized in that: Two flexible suction cups (270) are installed on the opposite surfaces of the first clamping plate (110) and the second clamping plate (120), the first claw (210) is located between the two suction cups (270) on the first clamping plate (110), and the bottom of the second claw (220) is located between the two suction cups (270) on the second clamping plate (120).