Packaging bag opening device

Abstract

A bag opening device relates to the field of material unsealing, comprising: a workbench, a through hole is provided in the center, four vertically movable baffles are provided along the circumferential direction around the through hole, used to limit the position of the bag; a transfer mechanism comprises a support frame arranged above the workbench and coaxial with the through hole, the support frame is in a cross shape, and a push plate is provided below the support frame, which moves along its track and moves vertically, and when the push plate is located at the center of the support frame, it rotates around its own axis to push the bag; the bag opening mechanism comprises a plurality of bearing plates rotatably installed on the workbench in a circular array, the side of the bearing plate is in a U shape, used to carry the bag, a limiting plate with an isosceles triangle cross section is provided on the side of the bearing plate away from the center of the workbench, a through groove with two ends passing through is provided on the top angle side of the limiting plate along its length direction, and a cutting knife moving along its length direction is provided in the through groove, used to cut the bag. The device can quickly transfer the bag and perform bag opening operations in batches, thereby improving efficiency and reducing labor intensity.

Description

Technical Field

[0001] The invention relates to the technical field of material unsealing, and in particular to a packaging bag opening device. Background Art

[0002] In the food processing industry, granular foods such as salt, flour, and sugar are the most commonly used raw materials. When using them, they usually need to be put into a mixing device to mix them with other foods. However, due to the huge usage volume of the factory, in order to facilitate storage, large-sized packaging bags are usually used to package the food raw materials, such as packaging bags of more than 25 kilograms, and the packaging bags are placed on the pallet in a stacked manner of two horizontally and three vertically. However, this also makes the pouring process very inconvenient, requiring workers to first remove the packaging bags from the pallet, and then remove the sealing line on the packaging bags. The food is then poured into a screening device, and then the screened raw materials are transferred to a mixing device. When pouring, due to its heavy weight, at least two people are required to lift the packaging bag and pour the food raw materials into the screening device. In the process of lifting and pouring, the food raw materials in the packaging bag may spill, resulting in waste of food raw materials, and the labor intensity of the workers is very high. In order to avoid spilling, granular foods such as flour and sugar are transferred to the screening equipment in multiple times with a spoon. Although the labor intensity is relatively low, the efficiency is too low, which is not conducive to the rapid progress of production. Summary of the invention

[0003] In view of the deficiencies of the above-mentioned related prior arts, the present application provides a packaging bag opening device, which can quickly transfer packaging bags and perform bag opening operations in batches, thereby improving efficiency, reducing labor intensity, and having strong practicality.

[0004] In order to achieve the above object, the present invention adopts the following technologies:

[0005] A packaging bag opening device comprises a workbench, a transfer mechanism and a bag opening mechanism.

[0006] A through hole is provided in the center of the workbench which passes through the workbench from top to bottom, and four baffles which are arranged to move in the vertical direction are arranged along the circumferential direction on the circumferential side of the through hole to limit the circumferential side of the packaging bag; the transfer mechanism includes a support frame which is arranged above the workbench and coaxial with the through hole, and the support frame is in a cross shape, and a push plate which moves along its trajectory and moves in the vertical direction is provided below it. When the push plate is located at the center of the support frame, it rotates around its own axis to push the packaging bag; the bag opening mechanism includes a plurality of supporting plates which are rotatably installed on the workbench in a circular array, and the side surface of the supporting plate is U-shaped for carrying the packaging bag, and a limiting plate with an isosceles triangle cross section is provided on the side of the supporting plate away from the center of the workbench, and a through groove with two ends passing through it is provided on the top angle side of the limiting plate along its length direction, and a cutting knife which is arranged to move along its length direction is provided in the through groove for cutting the packaging bag.

[0007] Furthermore, the support frame is provided with a cross-shaped slide groove which runs through the upper and lower parts, a support block is slidably fitted in the slide groove, a connecting rod which is arranged to move up and down is passed through the support block, and a key groove is used between the connecting rod and the support block, the push plate is connected to the lower end of the connecting rod, cross bars are provided on both sides of the support block, and at least one cross bar is passed through the connecting frame, the connecting frame is rotatably installed on the support frame, the support block is connected to the moving end of the first horizontal linear mechanism, and the first horizontal linear mechanism is installed on the connecting frame.

[0008] Furthermore, the upper end of the connecting rod abuts against a pressure plate, the pressure plate is connected to the moving end of the vertical lifting mechanism, the vertical lifting mechanism is installed on the connecting frame, a retaining ring is provided on the connecting rod, and a first spring is sleeved thereon, the two ends of the first spring respectively abut against the support block and the retaining ring, and are always in a compressed state.

[0009] Furthermore, a support ring is provided on the outside of the support frame, the connecting frame is rotatably mounted on the support ring, a gear ring is provided on the outside of the support ring, the gear ring is meshed with the driving gear, the driving gear is mounted on the transmission shaft, the transmission shaft is rotatably mounted on the connecting frame, and one end is connected to the output end of the power equipment, and the power equipment is mounted on the connecting frame.

[0010] Furthermore, a clamping plate is provided on the top of the supporting plate, and grooves are provided at both ends of the supporting plate. The two ends of the clamping plate fit in the grooves and are sleeved on the guide rod. The guide rod is installed on the base plate, and the base plate is installed on the side of the supporting plate. A first retaining ring is provided at the end of the guide rod, and a second spring is sleeved on the guide rod. The two ends of the second spring respectively abut against the clamping plate and the first retaining ring, and are always in a compressed state.

[0011] Furthermore, the workbench is provided with a plurality of recesses along the circumferential direction, and side panels are provided on both sides of the recesses. A connecting shaft is rotatably installed in the side panel, and one end of the connecting shaft is connected to the end of the supporting plate. When the supporting plate is in a vertical state, the supporting plate is located in the recess, and the side away from the center of the workbench is located below the workbench.

[0012] Top frames are arranged on both sides of the concave part, and convex rods are arranged on both ends of the clamping plate. When in use, the convex rods are in contact with the top of the top frame.

[0013] Furthermore, the cutting knife is detachably mounted on a moving rod, a portion of which is located at the bottom of a carrying plate and is sleeved on a sliding rod, which is mounted on the bottom of the carrying plate. A plurality of second horizontal linear mechanisms are provided along a circumferential direction on the bottom surface of the workbench, and the second horizontal linear mechanisms are arranged along a length direction of the carrying plate, and a moving block is provided at a moving end thereof, and a slot is provided on a side of the moving block away from the center of the workbench. When in use, at least a portion of the moving rod is located in the slot.

[0014] Furthermore, a convex plate is provided on the side of the baffle, the convex plate is sleeved on the vertical rod, the vertical rod is installed at the bottom of the workbench, a second retaining ring is provided at the lower end of the vertical rod, and a third spring is sleeved on the vertical rod. The two ends of the third spring respectively abut against the convex plate and the second retaining ring, and are always in a compressed state.

[0015] Furthermore, a push rod is provided on the top surface of the baffle, and the upper end of the push rod passes through the workbench. When in use, the bottom of the bearing plate abuts against the end of the push rod.

[0016] The beneficial effects of the present invention are as follows: through the push plate moving along the cross track in the transfer mechanism, the packaging bags carrying food raw materials on the tray can be quickly pushed onto the supporting plate in batches, thereby avoiding the excessive labor intensity caused by manual transfer; the packaging bags are supported by the supporting plate and cut by the cutting knife, so that the food raw materials in the packaging bags can be quickly poured out, thereby improving the transfer efficiency of the food raw materials; and the upper end of the packaging bag is clamped by the clamping plate to prevent it from slipping during the process of pouring the food raw materials; the setting of the baffle can prevent the packaging bag below from slipping due to friction during the process of pushing the packaging bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present invention.

[0018] Figure 1 It is a three-dimensional schematic diagram of the overall structure of an embodiment of the present application.

[0019] Figure 2 It is a three-dimensional schematic diagram of the transfer mechanism of an embodiment of the present application.

[0020] Figure 3 for Figure 2 An enlarged schematic diagram of point A.

[0021] Figure 4 It is a three-dimensional schematic diagram of the bag opening mechanism of an embodiment of the present application.

[0022] Figure 5 for Figure 4 An enlarged schematic diagram of point B.

[0023] Figure 6 This is a bottom view schematic diagram of the bag opening mechanism of an embodiment of the present application installed on a workbench.

[0024] Figure 7 for Figure 6 Enlarged schematic diagram of point C.

[0025] Figure 8 It is a three-dimensional schematic diagram of a carrying plate according to an embodiment of the present application.

[0026] Description of reference numerals: 100—working table, 200—transfer mechanism, 300—bag opening mechanism, 101—through hole, 102—blocking plate, 103—recess, 104—side plate, 105—top frame, 106—convex plate, 107—vertical rod, 108—second retaining ring, 109—third spring, 110—top rod, 201—support frame, 202—push plate, 203—slide groove, 204—support block, 205—connecting rod, 206—cross bar, 207—connecting frame, 208—pressing plate, 2 ...9—support frame, 201—pushing plate, 202—pushing plate, 203—sliding groove, 204—support block, 205—connecting rod, 206—cross bar, 208—pressing plate, 209— 9—retaining ring, 210—first spring, 211—supporting ring, 212—gear ring, 213—driving gear, 214—transmission shaft, 301—carrying plate, 302—limiting plate, 303—through groove, 304—cutting knife, 305—clamping plate, 306—groove, 307—guide rod, 308—bottom plate, 309—first retaining ring, 310—second spring, 311—connecting shaft, 312—convex rod, 313—moving rod, 314—sliding rod, 315—moving block, 316—slot. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the implementation modes of the present invention are described in detail below with reference to the accompanying drawings. However, the embodiments described in the present invention are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] like Figure 1 to Figure 8 As shown, an embodiment of the present application provides a packaging bag opening device, including: a workbench 100, a transfer mechanism 200, and a bag opening mechanism 300.

[0029] A through hole 101 is provided in the center of the workbench 100, which runs through from top to bottom. The through hole 101 can be set to a rectangular shape so as to pass through the packaging bags carried by the tray. Four baffles 102 are provided along the circumferential direction around the through hole 101, which are movable in the vertical direction, and are used to limit the sides of the packaging bags to prevent the packaging bags from slipping. The transfer mechanism 200 includes a support frame 201 which is arranged above the workbench 100 and is coaxial with the through hole 101. The support frame 201 is in a cross shape, and a push plate 202 which moves along its track and moves in the vertical direction is provided below the support frame 201. When the push plate 202 is in the When the support frame 201 is at the center, it rotates around its own axis to push the packaging bag; the bag opening mechanism 300 includes a plurality of supporting plates 301 rotatably installed on the workbench 100 in a circular array, the side of the supporting plate 301 is U-shaped, and is used to carry the packaging bag, and a limiting plate 302 with an isosceles triangle cross-section is provided on the side of the supporting plate 301 away from the center of the workbench 100, and a through groove 303 with two ends passing through it is provided on the top angle side of the limiting plate 302 along its length direction, and a cutting knife 304 is provided in the through groove 303 that is movably arranged along its length direction for cutting the packaging bag.

[0030] Specifically, Figure 1-Figure 2As shown, the support frame 201 is provided with a slide groove 203 which runs through from top to bottom and is in a cross shape, a support block 204 is slidably matched in the slide groove 203, a connecting rod 205 which is arranged to move up and down is passed through the support block 204, and a key groove is adopted between the connecting rod 205 and the support block 204, so that while ensuring that the connecting rod 205 and the support block 204 can slide toward each other, the support block 204 can also drive the connecting rod 205 to rotate synchronously, the push plate 202 is connected to the lower end of the connecting rod 205, and cross bars 206 are provided on both sides of the support block 204, and when the support block 204 is in the When the support block 204 is at the center of the slide slot 203, the two cross bars 206 are both inserted into the connecting frame 207. During the movement of the support block 204, at least one cross bar 206 is inserted into the connecting frame 207. The connecting frame 207 is rotatably mounted on the support frame 201. The support block 204 is connected to the moving end of the first horizontal linear mechanism. The first horizontal linear mechanism is mounted on the connecting frame 207. Since the packaging bags on the tray are arranged in a horizontal two and vertical three manner, and the upper and lower layers of packaging bags are staggered, the two horizontally placed packaging bags and the three vertically placed packaging bags are arranged in a staggered manner. The gap between the bags is not located at the center of the pallet, so when the packaging bags on the pallet need to be transferred, the support block 204 is located at the center of the slide slot 203, and the support block 204 is driven to move along one of the straight lines of the slide slot 203 by the first horizontal linear mechanism, and the push plate 202 is driven to move synchronously. When the push plate 202 is located at the gap between two horizontally placed packaging bags and three vertically placed packaging bags, a downward force is applied to the connecting rod 205, so that the lower end of the push plate 202 is lower than the top surface of the packaging bag. At this time, the support block 204 continues to move. The support block 204 can be moved to push part of the packaging bags into the carrier plate 301, and then the support block 204 moves back to the end of the slide slot 203, so as to push the other part of the packaging bags into another carrier plate 301. Then, the support block 204 is moved to the center of the slide slot 203, and the connecting frame 207 is rotated 90 degrees. Driven by the cross bar 206, the support block 204 is synchronously rotated 90 degrees, and the push plate 202 is moved upward, and then the tray is moved upward or the device is moved downward as a whole, and then the previous operation is repeated to realize the transfer of the next layer of packaging bags.

[0031] Specifically, Figure 2-Figure 3As shown, the upper end of the connecting rod 205 abuts against the pressure plate 208, and the pressure plate 208 is connected to the moving end of the vertical lifting mechanism. The vertical lifting mechanism is installed on the connecting frame 207. A retaining ring 209 is provided on the connecting rod 205, and a first spring 210 is sleeved thereon. The two ends of the first spring 210 abut against the support block 204 and the retaining ring 209 respectively, and are always in a compressed state. Under the action of the first spring 210, the connecting rod 205 always has a tendency to move upward. When it is necessary to move the push plate 202 downward, the pressure plate 208 is driven downward by the vertical lifting mechanism, thereby forcing the connecting rod 205 to move downward, and the first spring 210 is further compressed, thereby making the push plate 202 located in the gap between the two horizontally placed packaging bags and the three vertically placed packaging bags. After the transfer of the packaging bags is completed, the vertical lifting mechanism drives the pressure plate 208 to rise, and the connecting rod 205 will move upward under the action of the first spring 210.

[0032] Specifically, Figure 2-Figure 3 As shown, a support ring 211 is provided on the outer side of the support frame 201, and the connecting frame 207 is rotatably mounted on the support ring 211. A gear ring 212 is provided on the outer side of the support ring 211, and the gear ring 212 is meshed with a driving gear 213. The driving gear 213 is mounted on a transmission shaft 214, and the transmission shaft 214 is rotatably mounted on the connecting frame 207, and one end is connected to the output end of the power device. The power device is mounted on the connecting frame 207, and the driving gear 213 can be driven to rotate by driving the transmission shaft 214 to drive the driving gear 213 to rotate. Under the meshing transmission of the driving gear 213 and the gear ring 212, since the gear ring 212 is stationary, the connecting frame 207 will be forced to start rotating around the central axis of the gear ring 212, thereby driving the support block 204 to rotate.

[0033] Specifically, Figure 4 , Figure 8As shown, a clamping plate 305 is provided on the top of the bearing plate 301, and grooves 306 are provided at both ends of the bearing plate 301. The two ends of the clamping plate 305 fit in the grooves 306 and are sleeved on the guide rod 307. The guide rod 307 is installed on the bottom plate 308, and the bottom plate 308 is installed on the side of the bearing plate 301. A first retaining ring 309 is provided at the end of the guide rod 307. A second spring 310 is sleeved on the guide rod 307. The two ends of the second spring 310 are respectively abutted against the clamping plate 305 and the first retaining ring 309, and are always in a compressed state. Under the action of the second spring 310, the clamping plate 305 is always It has a tendency to move toward the bottom of the supporting plate 301. When the packaging bag carrying food ingredients is pushed onto the supporting plate 301, the upper end of the packaging bag can be clamped by the clamping plate 305 to prevent the packaging bag from slipping. Before the packaging bag is transferred to the supporting plate 301, a force away from the supporting plate 301 is applied to the clamping plate 305 to ensure that the packaging bag can be located between the clamping plate 305 and the supporting plate 301. In addition, a plurality of horizontal plates can be arranged between the clamping plate 305 and the limiting plate 302 to limit the side of the packaging bag to further prevent it from slipping.

[0034] Specifically, Figure 4 , Figure 8 As shown, the workbench 100 is provided with a plurality of recesses 103 along the circumferential direction, and side plates 104 are provided on both sides of the recesses 103. A connecting shaft 311 is rotatably installed in the side plate 104, and one end of the connecting shaft 311 is connected to the end of the supporting plate 301. By driving the connecting shaft 311 to rotate, the supporting plate 301 can be driven to rotate. When the supporting plate 301 is in a vertical state, the supporting plate 301 is located in the recess 103, and the side away from the center of the workbench 100 is located below the workbench 100. After the packaging bag is pushed to the supporting plate 301, the supporting plate 301 can start to rotate, so that it changes from a horizontal state to a vertical state, and then the packaging bag is cut by the cutting knife 304, and the food raw materials in the packaging bag will fall from the through slot 303 and enter the screening equipment.

[0035] Specifically, Figure 4-Figure 5 As shown, top frames 105 are provided on both sides of the recess 103, and protruding rods 312 are provided at both ends of the clamping plate 305. When the supporting plate 301 is in a horizontal state, the protruding rods 312 contact the top of the top frame 105, and the clamping plate 305 moves upward, forcing the second spring 310 to be further compressed, thereby ensuring that the packaging bag can be pushed between the supporting plate 301 and the clamping plate 305.

[0036] Specifically, Figure 4-Figure 7As shown, the cutting knife 304 is detachably mounted on the moving rod 313, such as bolted, for easy replacement. A portion of the moving rod 313 is located at the bottom of the carrying plate 301, so that the moving rod 313 is matched with the bottom of the carrying plate 301 as much as possible to avoid interference between the carrying plate 301 and the screening equipment during rotation. The moving rod 313 is sleeved on the sliding rod 314, and the sliding rod 314 is installed at the bottom of the carrying plate 301. A plurality of second horizontal linear mechanisms are provided along the circumferential direction of the bottom surface of the workbench 100. The second horizontal linear mechanisms are arranged along the length direction of the carrying plate 301, and a moving block 315 is provided at its moving end. A slot 316 is provided on the side of the moving block 315 away from the center of the workbench 100. When the carrying plate 301 is in a vertical state, at least a portion of the moving rod 313 is located in the slot 316. At this time, the moving block 315 is driven to move by the second horizontal linear mechanism, which will drive the moving rod 313 to move synchronously, and the cutting knife 304 moves along the length direction of the through slot 303, thereby cutting the packaging bag.

[0037] Specifically, Figure 6-Figure 7 As shown, a convex plate 106 is provided on the side of the baffle 102, and the convex plate 106 is sleeved on the vertical rod 107. The vertical rod 107 is installed at the bottom of the workbench 100. A second retaining ring 108 is provided at the lower end of the vertical rod 107, and a third spring 109 is sleeved on the vertical rod 107. The two ends of the third spring 109 are respectively abutted against the convex plate 106 and the second retaining ring 108, and are always in a compressed state. Under the action of the third spring 109, the baffle 102 has a tendency to move upward. When it is necessary to push the packaging bag, the two parallel baffles 102 are moved downward to ensure that the packaging bag can be smoothly pushed onto the carrying plate 301, and the upper ends of the other two baffles 102 are higher than the top surface of the workbench 100, providing a limit during the transfer of the packaging bag, and the lower end of the baffle 102 is always spaced from the bottom surface of the workbench 100, thereby providing a limit for the next layer of packaging bags to prevent the next layer of packaging bags from slipping under the action of friction.

[0038] Specifically, Figure 5 , Figure 7 As shown, a push rod 110 is provided on the top surface of the baffle 102, and the upper end of the push rod 110 passes through the workbench 100. When the supporting plate 301 changes from a vertical state to a horizontal state, the bottom of the supporting plate 301 abuts against the end of the push rod 110, thereby applying a downward force to the push rod 110, thereby forcing the baffle 102 to move downward, thereby facilitating the pushing operation of the packaging bag.

[0039] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A packaging bag opening device, characterized in that: include: A workbench (100) is provided with a through hole (101) penetrating vertically in the center, and four baffles (102) are provided along the circumferential direction around the through hole (101) and are arranged to move along the vertical direction, so as to limit the position of the packaging bag around the sides; The transfer mechanism (200) comprises a support frame (201) disposed above the workbench (100) and coaxial with the through hole (101); the support frame (201) is in a cross shape, and a push plate (202) is disposed below the support frame and moves along its track and in a vertical direction; when the push plate (202) is located at the center of the support frame (201), it rotates around its own axis to push the packaging bag; The bag opening mechanism (300) comprises a plurality of supporting plates (301) rotatably mounted on the workbench (100) in a circular array, the side of the supporting plate (301) being U-shaped and used for supporting packaging bags, a limiting plate (302) having an isosceles triangle cross section is provided on a side of the supporting plate (301) away from the center of the workbench (100), a through slot (303) penetrating at both ends is provided on the top angle side of the limiting plate (302) along its length direction, and a cutting knife (304) is provided in the through slot (303) and is movably arranged along its length direction, and is used for cutting packaging bags; The support frame (201) is provided with a slide groove (203) which penetrates from top to bottom and is in a cross shape. A support block (204) is slidably matched in the slide groove (203). A connecting rod (205) which is arranged to move in a vertical direction is passed through the support block (204), and a keyway is used to match the connecting rod (205) and the support block (204). The push plate (202) is connected to the lower end of the connecting rod (205). Both sides of the support block (204) are provided with cross bars (206), and at least one cross bar (206) is passed through a connecting frame (207). The connecting frame (207) is rotatably mounted on the support frame (201), and the rotation axis of the connecting frame (207) and the rotation axis of the push plate (202) are located on the same straight line. The support block (204) is connected to the moving end of the first horizontal linear mechanism, and the first horizontal linear mechanism is mounted on the connecting frame (207).

2. The packaging bag opening device according to claim 1, characterized in that: The upper end of the connecting rod (205) abuts against a pressure plate (208), and the pressure plate (208) is connected to the movable end of the vertical lifting mechanism. The vertical lifting mechanism is installed on the connecting frame (207). A retaining ring (209) is provided on the connecting rod (205) and a first spring (210) is sleeved thereon. The two ends of the first spring (210) respectively abut against the support block (204) and the retaining ring (209), and are always in a compressed state.

3. The packaging bag opening device according to claim 1, characterized in that: A support ring (211) is provided on the outside of the support frame (201); the connecting frame (207) is rotatably mounted on the support ring (211); a gear ring (212) is provided on the outside of the support ring (211); the gear ring (212) is meshed with a driving gear (213); the driving gear (213) is mounted on a transmission shaft (214); the transmission shaft (214) is rotatably mounted on the connecting frame (207) and one end of the transmission shaft is connected to an output end of a power device; the power device is mounted on the connecting frame (207).

4. The packaging bag opening device according to claim 1, characterized in that: A clamping plate (305) is provided on the top of the bearing plate (301), and grooves (306) are provided at both ends of the bearing plate (301). Both ends of the clamping plate (305) fit in the grooves (306) and are sleeved on a guide rod (307). The guide rod (307) is installed on a bottom plate (308), and the bottom plate (308) is installed on the side of the bearing plate (301). A first retaining ring (309) is provided at the end of the guide rod (307). A second spring (310) is sleeved on the guide rod (307), and both ends of the second spring (310) are respectively abutted against the clamping plate (305) and the first retaining ring (309), and are always in a compressed state.

5. The packaging bag opening device according to claim 4, characterized in that: The workbench (100) is provided with a plurality of recesses (103) along a circumferential direction, and side plates (104) are provided on both sides of the recesses (103). A connecting shaft (311) is rotatably mounted in the side plate (104), and one end of the connecting shaft (311) is connected to an end of the supporting plate (301). When the supporting plate (301) is in a vertical state, the supporting plate (301) is located in the recesses (103), and a side away from the center of the workbench (100) is located below the workbench (100).

6. The packaging bag opening device according to claim 5, characterized in that: Top frames (105) are provided on both sides of the recess (103), and convex rods (312) are provided on both ends of the clamping plate (305). When in use, the convex rods (312) are in contact with the top of the top frame (105).

7. The packaging bag opening device according to claim 1, characterized in that: The cutting knife (304) is detachably mounted on a moving rod (313); a portion of the moving rod (313) is located at the bottom of the supporting plate (301) and is sleeved on a sliding rod (314); the sliding rod (314) is mounted at the bottom of the supporting plate (301); a plurality of second horizontal linear mechanisms are provided along a circumferential direction on the bottom surface of the workbench (100); the second horizontal linear mechanisms are arranged along a length direction of the supporting plate (301), and a moving block (315) is provided at a moving end thereof; a slot (316) is provided on a side of the moving block (315) away from the center of the workbench (100); when in use, at least a portion of the moving rod (313) is located in the slot (316).

8. The packaging bag opening device according to claim 1, characterized in that: A convex plate (106) is provided on the side of the baffle (102), the convex plate (106) is sleeved on a vertical rod (107), the vertical rod (107) is installed on the bottom of the workbench (100), a second retaining ring (108) is provided at the lower end of the vertical rod (107), a third spring (109) is sleeved on the vertical rod (107), two ends of the third spring (109) respectively abut against the convex plate (106) and the second retaining ring (108), and are always in a compressed state.

9. The packaging bag opening device according to claim 8, characterized in that: A push rod (110) is provided on the top surface of the baffle (102), and the upper end of the push rod (110) passes through the workbench (100). When in use, the bottom of the bearing plate (301) abuts against the end of the push rod (110).

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