Bag opening clamping device of packaging bag

Abstract

The utility model discloses a bag mouth clamping device of a packaging bag, a first bag clamping mechanism and a second bag clamping mechanism are installed on an installation seat, the first bag clamping mechanism and the second bag clamping mechanism are the same in structure and installation mode, the first bag clamping mechanism comprises a first bag clamping bottom plate installed on the installation seat, and the second bag clamping mechanism comprises a second bag clamping bottom plate installed on the installation seat. The first bag clamping bottom plate is mounted on the mounting seat through a position adjusting structure, a first bag clamping lifting seat is vertically mounted on the first bag clamping bottom plate in a sliding manner, a first clamping jaw mounting plate is mounted on the first bag clamping lifting seat, and a first clamping jaw driven by a first opening and closing power device is mounted on the first clamping jaw mounting plate; a rubber pad is detachably installed at the tail end of the first clamping jaw, and a first lifting power device for driving the first bag clamping lifting base to ascend and descend is arranged between the first bag clamping bottom plate and the first bag clamping lifting base. The bag opening clamping device can clamp and lift the upper opening of the packaging bag before the packaging bag enters the thermal laminating machine, so that the bag opening of the packaging bag is vertical and does not incline, and subsequent better thermal laminating is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of packaging technical field, in particular to a kind of bag mouth clamping device of packaging bag. BACKGROUND

[0002] In powder packaging technology, powder is filled into bag by packing machine and then conveyed to hot laminator by conveying belt for hot lamination, and the hot lamination is mainly to seal the upper opening of the packaging bag. However, the upper opening of the packaging bag after filling may be inclined during conveying on the conveying belt, so that the sealing position may not be accurate during hot lamination on the hot laminator, which may result in an unfirm seal. SUMMARY

[0003] The utility model solves the technical problems: provide a kind of bag mouth clamping device of packaging bag, the bag mouth clamping device can be held and lifted to the upper opening of the packaging bag before the packaging bag enters hot laminator, so that the bag opening of the packaging bag is upright and not inclined, to facilitate better hot lamination subsequently.

[0004] To solve the above technical problems, the technical scheme of the utility model is: a bag mouth clamping device of packaging bag, comprising a mounting seat, a first bag clamping mechanism and a second bag clamping mechanism are installed on the mounting seat, the structure and installation method of the first bag clamping mechanism and the second bag clamping mechanism are the same, the first bag clamping mechanism comprises a first bag clamping bottom plate installed on the mounting seat, the first bag clamping bottom plate is installed on the mounting seat through a position adjusting structure, a first bag clamping lifting seat is vertically slidably installed on the first bag clamping bottom plate, a first clamping jaw mounting plate is installed on the first bag clamping lifting seat, a first clamping jaw driven by a first opening and closing power device is installed on the first clamping jaw mounting plate, a rubber pad is detachably installed at the end of the first clamping jaw, a first lifting power device for driving the first bag clamping lifting seat to lift is arranged between the first bag clamping bottom plate and the first bag clamping lifting seat.

[0005] As a preferred scheme, the first clamping jaw comprises a first clamping jaw body and a second clamping jaw body, upper ends of the first clamping jaw body are respectively hinged to the first clamping jaw mounting plate through first hinge shafts, a middle part of the second clamping jaw body is hinged to the first clamping jaw mounting plate through a second hinge shaft, the first opening and closing power device is a first opening and closing cylinder, one end of the first opening and closing cylinder is hinged to the first clamping jaw mounting plate, the other end of the first opening and closing cylinder is hinged to an upper end of the second clamping jaw body, one side of the first clamping jaw body is provided with a first synchronous hinge shaft, one side of the second clamping jaw body is provided with a second synchronous hinge shaft, a synchronous opening and closing connecting rod is arranged between the first synchronous hinge shaft and the second synchronous hinge shaft, the first synchronous hinge shaft and the second synchronous hinge shaft are both located between the first hinge shaft and the second hinge shaft, the first synchronous hinge shaft is located below the line connecting the first hinge shaft and the second hinge shaft, and the second synchronous hinge shaft is located above the line connecting the first hinge shaft and the second hinge shaft.

[0006] As a preferred scheme, a lower end of the first clamping jaw body is provided with a mounting stepped groove, a connecting stud is arranged on the mounting stepped groove, a central hole sleeved on the connecting stud is arranged on the rubber pad, and the rubber pad is sleeved on the connecting stud and fixed through a compression nut.

[0007] As a preferred scheme, the position adjusting structure comprises a first vertical slot and a first adjusting bolt and nut, the first vertical slot is arranged on the first bag clamping bottom plate, the first adjusting bolt is constrained in the first vertical slot and fixes the first bag clamping bottom plate and the mounting seat through a nut.

[0008] As a preferred scheme, the mounting seat is further provided with a first horizontal slot, and the first adjusting bolt is also constrained in the first horizontal slot.

[0009] As a preferred scheme, the position adjusting structure comprises a horizontal guide rail fixed on the mounting seat, a first horizontal adjusting sliding seat and a second horizontal adjusting sliding seat are horizontally and slidingly arranged on the horizontal guide rail, the first bag clamping bottom plate and the second bag clamping bottom plate are respectively fixed on the first horizontal adjusting sliding seat and the second horizontal adjusting sliding seat, and the mounting seat is provided with a synchronous adjusting mechanism for adjusting synchronous reverse movement of the first horizontal adjusting sliding seat and the second horizontal adjusting sliding seat.

[0010] As a preferred scheme, the synchronous adjusting mechanism comprises a double-end adjusting screw rod rotatably arranged on the mounting base, a first nut and a second nut are respectively threadedly arranged on a right thread segment and a reverse thread segment of the double-end adjusting screw rod, the first nut and the second nut are respectively fixed with the first bag clamping bottom plate and the second bag clamping bottom plate, a worm wheel is further arranged on the double-end adjusting screw rod, an operating rod is rotatably arranged on the mounting base and vertically arranged, a hand wheel is arranged on the upper end of the operating rod, and a worm is arranged on the lower end of the operating rod and matched with the worm wheel.

[0011] After the above technical scheme is adopted, the effect of the utility model is that: due to the bag clamping device of the packaging bag, comprising a mounting base, a first bag clamping mechanism and a second bag clamping mechanism are arranged on the mounting base, the structure and mounting mode of the first bag clamping mechanism and the second bag clamping mechanism are same, the first bag clamping mechanism comprises a first bag clamping bottom plate arranged on the mounting base, the first bag clamping bottom plate is arranged on the mounting base through a position adjusting structure, a first bag clamping lifting seat is vertically and slidably arranged on the first bag clamping bottom plate, a first clamping jaw mounting plate is arranged on the first bag clamping lifting seat, a first clamping jaw driven by a first opening and closing power device is arranged on the first clamping jaw mounting plate, a rubber pad is detachably arranged on the tail end of the first clamping jaw, and a first lifting power device driving the first bag clamping lifting seat to lift is arranged between the first bag clamping bottom plate and the first bag clamping lifting seat; firstly, the mounting position of the first bag clamping bottom plate is adjusted through the position adjusting mechanism, then the first lifting power device drives the first bag clamping lifting seat to lift, so that the first clamping jaw is close to the bag opening downwards, then the first opening and closing power device drives the first clamping jaw to close, and then the first lifting power device drives the first clamping jaw to hold the bag opening and then to rise, and the second bag clamping mechanism is the same, so that the packaging bag can be lifted, and the bag opening is accurately upward; the bag clamping device can clamp and lift the upper opening of the packaging bag before the packaging bag enters the heat bonding machine, so that the bag opening of the packaging bag is upright and not inclined, thereby facilitating better heat bonding in the subsequent process.

[0012] Further, the first clamping jaw comprises a first clamping jaw body and a second clamping jaw body, the upper end of the first clamping jaw body is hingedly connected to the first clamping jaw mounting plate through a first hinge shaft, the middle part of the second clamping jaw body is hingedly connected to the first clamping jaw mounting plate through a second hinge shaft, the first opening and closing power device is a first opening and closing cylinder, one end of the first opening and closing cylinder is hingedly connected to the first clamping jaw mounting plate, the other end of the first opening and closing cylinder is hingedly connected to the upper end of the second clamping jaw body, one side of the first clamping jaw body is provided with a first synchronous hinge shaft, one side of the second clamping jaw body is provided with a second synchronous hinge shaft, a synchronous opening and closing connecting rod is arranged between the first synchronous hinge shaft and the second synchronous hinge shaft, the first synchronous hinge shaft and the second synchronous hinge shaft are located between the first hinge shaft and the second hinge shaft, the first synchronous hinge shaft is located below the line connecting the first hinge shaft and the second hinge shaft, and the second synchronous hinge shaft is located above the line connecting the first hinge shaft and the second hinge shaft; by the extension of the piston rod of the first opening and closing cylinder, the end of the second clamping jaw body is inwardly combined, and at the same time, the synchronous opening and closing connecting rod drives the end of the first clamping jaw body to be inwardly combined; on the contrary, the retraction of the piston rod of the first opening and closing cylinder can make the end of the second clamping jaw body outwardly open, and at the same time, the synchronous opening and closing connecting rod drives the end of the first clamping jaw body to be outwardly open, thereby ensuring the stable and accurate opening and closing of the bag opening.

[0013] Further, the lower end of the first clamping jaw body is provided with a mounting step groove, a connecting stud is arranged on the mounting step groove, a central hole for sleeving the connecting stud is arranged on the rubber pad, and the rubber pad is sleeved on the connecting stud and fixed through a compression nut; the mounting position is quickly positioned, the rubber pad can be firmly mounted, and the rubber pad is convenient to replace, thereby improving the use effect.

[0014] Further, the position adjusting structure comprises a first vertical slot and a first adjusting bolt and nut, the first vertical slot is arranged on the first bag clamping bottom plate, and the first adjusting bolt is constrained in the first vertical slot and fixes the first bag clamping bottom plate and the mounting seat through the nut; in this way, the first bag clamping bottom plate can adjust the height position through the first vertical slot, and is suitable for packaging bags of different heights.

[0015] Further, the mounting seat is further provided with a first horizontal slot, and the first adjusting bolt is also constrained in the first horizontal slot; in this way, the horizontal position of the first bag clamping bottom plate can be adjusted, so that the bag opening of the clamped packaging bag can be clamped at different horizontal positions.

[0016] And since the position adjusting structure comprises horizontal guide rails fixed on the mounting base, the first horizontal adjusting slide and the second horizontal adjusting slide are horizontally slidably mounted on the horizontal guide rails, the first bag clamping bottom plate and the second bag clamping bottom plate are fixed on the first horizontal adjusting slide and the second horizontal adjusting slide respectively, and the mounting base is provided with a synchronous adjusting mechanism for adjusting synchronous reverse movement of the first horizontal adjusting slide and the second horizontal adjusting slide, the horizontal sliding of the first horizontal adjusting slide and the second horizontal adjusting slide can be adjusted through the synchronous adjusting mechanism, so that the first bag clamping bottom plate and the second bag clamping bottom plate can be adjusted to slide horizontally towards the inside or the outside, and the adjustment is simpler and more convenient.

[0017] And since the position adjusting structure comprises horizontal guide rails fixed on the mounting base, the first horizontal adjusting slide and the second horizontal adjusting slide are horizontally slidably mounted on the horizontal guide rails, the first bag clamping bottom plate and the second bag clamping bottom plate are fixed on the first horizontal adjusting slide and the second horizontal adjusting slide respectively, and the mounting base is provided with a synchronous adjusting mechanism for adjusting synchronous reverse movement of the first horizontal adjusting slide and the second horizontal adjusting slide, the horizontal sliding of the first horizontal adjusting slide and the second horizontal adjusting slide can be adjusted through the synchronous adjusting mechanism, so that the first bag clamping bottom plate and the second bag clamping bottom plate can be adjusted to slide horizontally towards the inside or the outside, and the adjustment is simpler and more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model will be further explained in connection with the drawings and examples.

[0019] Figure 1 It is the perspective view of the utility model embodiment;

[0020] Figure 2 It is the structure schematic view of the utility model embodiment rear side;

[0021] Figure 3 It is the structure schematic view of the utility model embodiment first bag clamping mechanism;

[0022] Figure 4 It is the structure schematic view of the utility model embodiment second bag clamping mechanism;

[0023] Figure 5 It is the front view of the utility model embodiment position adjusting structure;

[0024] In the attached diagram: 1. Mounting base; 2. First bag clamping bottom plate; 3. First bag clamping lifting seat; 4. First gripper mounting plate; 5. Rubber pad; 6. Second bag clamping bottom plate; 7. Second bag clamping lifting seat; 8. Second gripper mounting plate; 9. First lifting motor; 10. Second lifting motor; 11. First gripper unit; 12. Second gripper unit; 13. First hinge shaft; 14. Second hinge shaft; 15. First opening / closing cylinder; 16. First synchronous hinge shaft; 17. Second synchronous hinge shaft; 18. Synchronous opening / closing connecting rod; 19. Third gripper unit; 20. Fourth gripper unit; 21. Third hinge shaft; 22. 23. Second opening and closing cylinder; 24. Third synchronous hinge shaft; 25. Fourth synchronous hinge shaft; 26. Mounting step groove; 27. Center hole; 28. First vertical bar hole; 29. ​​First adjusting bolt and nut; 30. Second vertical bar hole; 31. Second adjusting bolt and nut; 32. First horizontal bar hole; 33. Second horizontal bar hole; 34. Horizontal guide rail; 35. First horizontal adjusting slide; 36. Second horizontal adjusting slide; 37. Double-ended adjusting screw; 38. First nut; 39. Second nut; 40. Worm gear; 41. Operating lever; 42. Handwheel; 43. Worm gear. Detailed Implementation

[0025] The present invention will be further described in detail below through specific embodiments.

[0026] like Figures 1 to 5 As shown, a bag clamping device for packaging bags includes a mounting base 1. A first bag clamping mechanism and a second bag clamping mechanism are mounted on the mounting base 1. The first bag clamping mechanism and the second bag clamping mechanism have the same structure and installation method. The first bag clamping mechanism includes a first bag clamping base plate 2 mounted on the mounting base 1. The first bag clamping base plate 2 is mounted on the mounting base 1 through a position adjustment structure. A first bag clamping lifting seat 3 is vertically slidably mounted on the first bag clamping base plate 2. A first gripper mounting plate 4 is mounted on the first bag clamping lifting seat 3. A first gripper driven by a first opening and closing power device is mounted on the first gripper mounting plate 4. A rubber pad 5 is detachably mounted at the end of the first gripper. A first lifting power device for driving the first bag clamping lifting seat 3 to rise and fall is provided between the first bag clamping base plate 2 and the first bag clamping lifting seat 3.

[0027] The second bag clamping mechanism also includes a second bag clamping base plate 6 located on the mounting base 1. The second bag clamping base plate 6 is mounted on the mounting base 1 through the same position adjustment structure. A second bag clamping lifting seat 7 is vertically slidably mounted on the second bag clamping base plate 6. A second gripper mounting plate 8 is mounted on the second bag clamping lifting seat 7. A second gripper driven by a second opening and closing power device is mounted on the second gripper mounting plate 8. A rubber pad 5 is detachably mounted at the end of the second gripper. A second lifting power device for driving the second bag clamping lifting seat 7 to rise and fall is provided between the second bag clamping base plate 6 and the second bag clamping lifting seat 7.

[0028] The first lifting power device comprises a first lifting motor 9, and the second lifting power device comprises a second lifting motor 10. The first lifting motor 9 and the second lifting motor 10 respectively drive the first bag clamping lifting seat 3 and the second bag clamping lifting seat 7 to lift stably.

[0029] As shown in Figure 3 The first clamping jaw comprises a first clamping jaw body 11 and a second clamping jaw body 12. The upper end of the first clamping jaw body 11 is hingedly connected to the first clamping jaw mounting plate 4 through a first hinge shaft 13. The middle part of the second clamping jaw body 12 is hingedly connected to the first clamping jaw mounting plate 4 through a second hinge shaft 14. The first opening and closing power device is a first opening and closing cylinder 15. One end of the first opening and closing cylinder 15 is hingedly connected to the first clamping jaw mounting plate 4, and the other end of the first opening and closing cylinder 15 is hingedly connected to the upper end of the second clamping jaw body 12. One side of the first clamping jaw body 11 is provided with a first synchronous hinge shaft 16, and one side of the second clamping jaw body 12 is provided with a second synchronous hinge shaft 17. A synchronous opening and closing connecting rod 18 is arranged between the first synchronous hinge shaft 16 and the second synchronous hinge shaft 17. The first synchronous hinge shaft 16 and the second synchronous hinge shaft 17 are both located between the first hinge shaft 13 and the second hinge shaft 14. The first synchronous hinge shaft 16 is located below the line connecting the first hinge shaft 13 and the second hinge shaft 14, and the second synchronous hinge shaft 17 is located above the line connecting the first hinge shaft 13 and the second hinge shaft 14.

[0030] The second clamping jaw comprises a third clamping jaw unit 19 and a fourth clamping jaw unit 20, the upper end of the third clamping jaw unit 19 is hingedly connected to the second clamping jaw mounting plate 8 through a third hinge shaft 21, the middle part of the fourth clamping jaw unit 20 is hingedly connected to the second clamping jaw mounting plate 8 through a fourth hinge shaft 22, the second opening and closing power device is a second opening and closing cylinder 23, one end of the second opening and closing cylinder 23 is hingedly connected to the second clamping jaw mounting plate 8, the other end of the second opening and closing cylinder 23 is hingedly connected to the upper end of the fourth clamping jaw unit 20, one side of the third clamping jaw unit 19 is provided with a third synchronous hinge shaft 24, one side of the fourth clamping jaw unit 20 is provided with a fourth synchronous hinge shaft 25, a synchronous opening and closing connecting rod 18 is also arranged between the third synchronous hinge shaft 24 and the fourth synchronous hinge shaft 25, the third synchronous hinge shaft 24 and the fourth synchronous hinge shaft 25 are both located between the third hinge shaft 21 and the fourth hinge shaft 22, and the third synchronous hinge shaft 24 is located below the line between the third hinge shaft 21 and the fourth hinge shaft 22, and the fourth synchronous hinge shaft 25 is located above the line between the third hinge shaft 21 and the fourth hinge shaft 22; through the extension of the piston rod of the first opening and closing cylinder 15, the end of the second clamping jaw unit 12 is inwardly combined, and at the same time, the synchronous opening and closing connecting rod 18 will drive the end of the first clamping jaw unit 11 to be inwardly combined; conversely, the retraction of the piston rod of the first opening and closing cylinder 15 can make the end of the second clamping jaw unit 12 outwardly open, and at the same time, the synchronous opening and closing connecting rod 18 will drive the end of the first clamping jaw unit 11 to be outwardly open, thereby ensuring the stable and accurate opening and closing of the bag opening; the second clamping jaw is also driven in the same way.

[0031] In the embodiment, the lower end of the first clamping jaw unit 11 is provided with a mounting step groove 26, the mounting step groove 26 is provided with a connecting stud, the rubber pad 5 is provided with a central hole 27 sleeved on the connecting stud, and the rubber pad 5 is sleeved on the connecting stud and fixed through a compression nut; the mounting step groove 26 can quickly position the installation position, the rubber pad 5 can be firmly installed, and is convenient to replace, thereby improving the use effect; the connecting stud can; the second clamping jaw unit 12, the third clamping jaw unit 19 and the fourth clamping jaw unit 20 are all fixedly provided with the mounting step groove 26.

[0032] As shown in Figure 1 and Figure 2 The position adjusting structure comprises a first vertical strip hole 28 and a first adjusting bolt nut 29, the first vertical strip hole 28 is arranged on the first bag clamping bottom plate 2, the first adjusting bolt is constrained in the first vertical strip hole 28 and fixes the first bag clamping bottom plate 2 and the mounting seat 1 through a nut; the first bag clamping bottom plate 2 is provided with two first vertical strip holes 28 upward and downward, thereby ensuring firm installation, so that the first bag clamping bottom plate 2 can adjust the height position through the first vertical strip hole 28, and adapt to packaging bags of different heights; the second bag clamping bottom plate 6 is also provided with a corresponding second vertical strip hole 30 and a second adjusting bolt nut 31.

[0033] As Figure 5 shown, the mounting seat 1 is further provided with a first horizontal bar hole 32, and the first adjusting bolt is also constrained in the first horizontal bar hole 32; the mounting seat 1 is further provided with a second horizontal bar hole 33, and the second adjusting bolt is also constrained in the second horizontal bar hole 33, so as to adjust the horizontal positions of the first bag clamping bottom plate 2 and the second bag clamping bottom plate 6, thereby clamping the bag opening at different horizontal positions.

[0034] As Figure 2 shown, the position adjusting structure comprises a horizontal guide rail 34 fixed on the mounting seat 1, the first horizontal adjusting sliding seat 35 and the second horizontal adjusting sliding seat 36 are horizontally slidably installed on the horizontal guide rail 34, the first bag clamping bottom plate 2 and the second bag clamping bottom plate 6 are respectively fixed on the first horizontal adjusting sliding seat 35 and the second horizontal adjusting sliding seat 36, and the mounting seat 1 is provided with a synchronous adjusting mechanism for adjusting the synchronous reverse movement of the first horizontal adjusting sliding seat 35 and the second horizontal adjusting sliding seat 36; the horizontal sliding of the first horizontal adjusting sliding seat 35 and the second horizontal adjusting sliding seat 36 can be adjusted through the synchronous adjusting mechanism, so that the first bag clamping bottom plate 2 and the second bag clamping bottom plate 6 can be adjusted to slide horizontally towards the inside or the outside, and the adjustment is simpler and more convenient.

[0035] Further, the synchronous adjusting mechanism comprises a double-head adjusting screw 37 rotatably installed on the mounting seat 1, the first nut 38 and the second nut 39 are respectively threadedly installed on the forward threaded section and the reverse threaded section of the double-head adjusting screw 37, the first nut 38 and the second nut 39 are respectively fixed with the first bag clamping bottom plate 2 and the second bag clamping bottom plate 6, the double-head adjusting screw 37 is further provided with a worm gear 40, the mounting seat 1 is rotatably provided with a vertical operating rod 41, the upper end of the operating rod 41 is provided with a hand wheel 42, and the lower end of the operating rod 41 is provided with a worm 43 matched with the worm gear 40; the worm 43 is driven to rotate by rotating the hand wheel 42, so as to drive the worm gear 40 to rotate, when the double-head adjusting screw 37 rotates, the first nut 38 and the second nut 39 can be synchronously moved, thereby driving the first bag clamping bottom plate 2 and the second bag clamping bottom plate 6 to move, so that the adjustment is convenient and fast.

[0036] The working principle of the embodiment is as follows: first, the height positions of the first bag clamping bottom plate 2 and the second bag clamping bottom plate 6 are adjusted through the first vertical slot hole 28 and the second vertical slot hole 30, then the horizontal positions of the first bag clamping bottom plate 2 and the second bag clamping bottom plate 6 are adjusted through the first horizontal slot hole 32 and the second horizontal slot hole 33, or the worm 43 is rotated by rotating the hand wheel 42, then the worm wheel 40 is driven to rotate, and the double-end adjusting screw rod 37 is rotated, at the same time, the first nut 38 and the second nut 39 are synchronously moved, the first bag clamping bottom plate 2 and the second bag clamping bottom plate 6 are driven to move, then the first lifting motor 9 and the second lifting motor 10 respectively drive the first bag clamping lifting seat 3 and the second bag clamping lifting seat 7 to descend, the first opening and closing cylinder 15 and the second opening and closing cylinder 23 respectively drive the first clamping jaw single body 11, the second clamping jaw single body 12 and the third clamping jaw single body 19, the fourth clamping jaw single body 20 to merge and clamp two ends of the bag opening of the packaging bag, then the first bag clamping lifting seat 3 and the second bag clamping lifting seat 7 are driven to ascend, the packaging bag is lifted, and the bag opening of the packaging bag is erected.

[0037] The above-described embodiment is only a description of the preferred embodiment of the utility model, and is not used as a limitation on the range of the utility model. On the basis of not departing from the design spirit of the utility model, various deformations and modifications of the technical scheme of the utility model are all within the protection range determined by the claims of the utility model.

Claims

1. A bag mouth clamping device for a packaging bag, comprising a mounting base, characterized in that: The mounting base is provided with a first bag clamping mechanism and a second bag clamping mechanism, the first bag clamping mechanism and the second bag clamping mechanism are identical in structure and mounting mode, the first bag clamping mechanism comprises a first bag clamping bottom plate mounted on the mounting base, the first bag clamping bottom plate is mounted on the mounting base through a position adjusting structure, a first bag clamping lifting seat is vertically and slidingly mounted on the first bag clamping bottom plate, a first clamping jaw mounting plate is mounted on the first bag clamping lifting seat, a first clamping jaw driven by a first opening and closing power device is mounted on the first clamping jaw mounting plate, a rubber pad is detachably mounted at the end of the first clamping jaw, and a first lifting power device for driving the first bag clamping lifting seat to lift is arranged between the first bag clamping bottom plate and the first bag clamping lifting seat.

2. A bag opening gripping device for a packaging bag as defined in claim 1, characterized in that: The first clamping jaw comprises a first clamping jaw body and a second clamping jaw body, the upper ends of the first clamping jaw body are respectively hinged to the first clamping jaw mounting plate through first hinge shafts, the middle part of the second clamping jaw body is hinged to the first clamping jaw mounting plate through a second hinge shaft, the first opening and closing power device is a first opening and closing cylinder, one end of the first opening and closing cylinder is hinged to the first clamping jaw mounting plate, the other end of the first opening and closing cylinder is hinged to the upper end of the second clamping jaw body, a first synchronous hinge shaft is arranged on one side of the first clamping jaw body, a second synchronous hinge shaft is arranged on one side of the second clamping jaw body, a synchronous opening and closing connecting rod is arranged between the first synchronous hinge shaft and the second synchronous hinge shaft, the first synchronous hinge shaft and the second synchronous hinge shaft are both located between the first hinge shaft and the second hinge shaft, the first synchronous hinge shaft is located below the line connecting the first hinge shaft and the second hinge shaft, and the second synchronous hinge shaft is located above the line connecting the first hinge shaft and the second hinge shaft.

3. A bag opening gripping device for a packaging bag as defined in claim 2, characterized in that: A mounting step groove is arranged at the lower end of the first clamping jaw body, a connecting stud is arranged on the mounting step groove, a central hole of the rubber pad is arranged to be sleeved on the connecting stud, and the rubber pad is sleeved on the connecting stud and fixed through a pressing nut.

4. A bag opening gripping device for a packaging bag as defined in claim 3, characterized in that: The position adjusting structure comprises a first vertical slot and a first adjusting bolt and nut, the first vertical slot is arranged on the first bag clamping bottom plate, and the first adjusting bolt is constrained in the first vertical slot and fixes the first bag clamping bottom plate to the mounting base through the nut.

5. A bag opening device for a bag as defined in claim 4, wherein: The mounting base is further provided with a first horizontal slot, and the first adjusting bolt is also constrained in the first horizontal slot.

6. A bag opening device for a bag as defined in claim 3, wherein: The position adjusting structure comprises a horizontal guide rail fixed on the mounting base, a first horizontal adjusting sliding seat and a second horizontal adjusting sliding seat are horizontally and slidingly mounted on the horizontal guide rail, the first bag clamping bottom plate and the second bag clamping bottom plate are respectively fixed on the first horizontal adjusting sliding seat and the second horizontal adjusting sliding seat, and a synchronous adjusting mechanism for adjusting synchronous reverse movement of the first horizontal adjusting sliding seat and the second horizontal adjusting sliding seat is mounted on the mounting base.

7. A bag opening gripping device for a packaging bag as defined in claim 6, characterized in that: The synchronous adjusting mechanism comprises a double-end adjusting screw rod rotatably mounted on a mounting base, a first nut and a second nut are respectively threadedly mounted on a right-threaded section and a left-threaded section of the double-end adjusting screw rod, the first nut and the second nut are fixed with the first bag clamping bottom plate and the second bag clamping bottom plate respectively, a worm wheel is further arranged on the double-end adjusting screw rod, an operating rod is rotatably arranged on the mounting base and vertically arranged, a hand wheel is arranged on an upper end of the operating rod, and a worm is arranged on a lower end of the operating rod and matched with the worm wheel.

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