Paperboard bending mechanism of carton stapler

Abstract

The paperboard bending mechanism comprises a base, a shell is fixedly connected to the outer side of the top of the base, a containing table is arranged in the center of the top of the base, a supporting seat is arranged at the position, close to the top, in the shell, and side pressing plates are arranged at the positions, close to the two sides, of the bottom of the supporting seat; first grooves are formed in the positions, close to the two sides, in the supporting base, and threaded rotating rods are symmetrically and rotationally connected to the centers in the two first grooves. According to the paperboard bending mechanism of the carton stapler, a variable frequency motor is started, a transverse gear is driven to be meshed with a longitudinal gear, then a rotating rod and two threaded rotating rods are driven to rotate synchronously, and due to the fact that a threaded sleeve plate is in threaded connection with the threaded rotating rods, the threaded sleeve plate can move up and down along the threaded rotating rods; the side pressing plate is pushed by the moving plate to accurately adjust the position in the supporting seat, so that the side pressing plate can quickly adapt to paperboards with different sizes, a mold or the pressing plate does not need to be replaced, and the operation time and cost are greatly saved.

Description

Technical Field

[0001] The invention relates to the technical field of cardboard processing, in particular to a cardboard bending mechanism of a box nailing machine. Background Art

[0002] The production process of cartons involves a series of operations such as printing and laminating. After the cardboard is processed, it needs to be folded, and then the folded cardboard is nailed to form paper.

[0003] Most existing cardboard bending mechanisms use fixed bending molds or pressing plates. Once the design and size of these molds or pressing plates are determined, it is difficult to adapt to cardboards of different sizes. When cardboards of different sizes need to be bent, it is usually necessary to replace molds or pressing plates of different sizes, which not only increases the difficulty and time cost of operation, but also may lead to frequent replacement and wear of molds or pressing plates, increasing maintenance costs. Summary of the invention

[0004] The object of the present invention is to provide a cardboard bending mechanism for a carton nailing machine to solve the problem mentioned in the above background technology that most of the existing cardboard bending mechanisms adopt fixed bending molds or pressing plates. Once the design and size of these molds or pressing plates are determined, it is difficult to adapt to cardboards of different sizes. When cardboards of different sizes need to be bent, molds or pressing plates of different sizes usually need to be replaced, which not only increases the difficulty of operation and time cost, but also may lead to frequent replacement and wear of molds or pressing plates, thereby increasing maintenance costs.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a cardboard bending mechanism of a nailing machine comprises a base, the outer side of the top of the base is fixedly connected to a shell, a placing platform is arranged at the center of the top of the base, a support seat is arranged at the top position in the shell, side pressure plates are arranged at the two side positions of the bottom of the support seat, grooves 1 are arranged at the two side positions in the support seat, threaded rotating rods are symmetrically connected to the centers of the two grooves 1 for rotation, a threaded sleeve plate is sleeved on the surface of the threaded rotating rod and threadedly connected, a movable plate is fixedly connected to the bottom of the threaded sleeve plate, movable grooves are arranged at the bottoms of the two grooves 1 at the two side positions of the bottom of the support seat, the bottom of the movable plate penetrates to the outside of the movable groove and is connected to the top of the side pressure plate The bottom of the supporting seat is fixedly connected with a center seat, and the bottom of the center seat is provided with a movable column, and the bottom of the movable column is fixedly connected with a mounting plate, and the bottom of the mounting plate is provided with a medium pressure plate. A movable groove is opened inside the center seat, and the top of the movable column penetrates into the inside of the movable groove and is slidably connected to the movable groove. An inner sliding groove is opened at the center of the top of the movable column, and a slider is slidably connected to the top of the inner sliding groove. The center of the top of the slider is fixedly connected with a limiting rod, and the top of the limiting rod penetrates into the inside of the movable groove and is fixedly connected to the top in the movable groove, and a buffer spring is sleeved on the surface of the limiting rod, and the top and bottom of the buffer spring are respectively fixedly connected to the top in the movable groove and the top of the movable column.

[0006] Preferably, a card slot is provided at the center of the top of the base, a card plate is fixedly connected to the bottom of the placement table, the bottom of the card plate passes through the interior of the card slot and is clamped with the card slot, and the bottom of both sides of the placement table are threadedly connected with a fixing bolt, the bottom of the fixing bolt passes through the interior of the base and is threadedly connected to the base.

[0007] Preferably, a cylinder is fixedly installed at the center of the top of the shell, the output end of the bottom of the cylinder is fixedly connected to a piston rod, the bottom of the piston rod penetrates into the interior of the shell and is fixedly connected to a push rod, and the bottom of the push rod is fixedly connected to the top of the support seat.

[0008] Preferably, a groove 2 is opened between the two grooves 1 corresponding to the interior of the support seat, and a rotating rod is rotatably connected inside the groove 2. Both sides of the rotating rod respectively penetrate into the interior of the two grooves 1 and are fixedly connected to two threaded rotating rods. A frequency conversion motor is fixedly installed on the top of the groove 1, and the output end of the bottom of the frequency conversion motor is fixedly connected to the main shaft, and the bottom of the main shaft is fixedly connected to a transverse gear, and a longitudinal gear is fixedly connected to one side of the rotating rod, and one side of the bottom of the transverse gear is meshed with one side of the top of the longitudinal gear.

[0009] Preferably, both sides of the bottom of the support seat are fixedly connected with external plates, the front side and the rear side between the two external plates are fixedly connected with support rods, and the support rods are sleeved and slidably connected with the two side pressure plates.

[0010] Preferably, a second card slot is provided at the center of the top of the medium pressure plate, and threaded grooves are provided on four sides of the top of the medium pressure plate corresponding to the second card slot, a card column is fixedly connected to the center of the bottom of the mounting plate, the bottom of the card column penetrates into the interior of the second card slot and is clamped with the second card slot, and two fixing bolts are threadedly connected to the four sides of the top of the mounting plate, and the bottom of the two fixing bolts penetrates into the interior of the thread slot and is threadedly connected to the thread slot, the bottoms of both sides of the center seat are fixedly connected with extension plates, and positioning rods are fixedly connected to the four sides of the top of the medium pressure plate, the top of the positioning rods penetrates into the outside of the extension plate and is threadedly connected to a limiting nut, and the bottom of the limiting nut contacts the top of the extension plate.

[0011] A method for using a cardboard bending mechanism of a box stapler comprises the following steps:

[0012] Step 1. First, place the cardboard to be bent on the placement table, ensure the position of the cardboard is accurate, and adjust the position of the two side pressure plates: start the frequency conversion motor, and its output end drives the transverse gear to rotate through the main shaft, and the transverse gear engages with the longitudinal gear, thereby driving the rotating rod to rotate, and the rotating rod drives the two threaded rotating rods to rotate synchronously. Since the threaded sleeve is threadedly connected to the threaded rotating rod, the threaded sleeve will move up and down along the threaded rotating rod. The bottom of the threaded sleeve pushes the side pressure plate to move in the support seat through the moving plate until the side pressure plate is adjusted to a suitable position to bend the cardboard.

[0013] Step 2: The output end at the bottom of the cylinder pushes the push rod through the piston rod, and the push rod drives the support seat and the entire cardboard bending mechanism to move downward. As the support seat descends, the middle pressure plate first contacts the cardboard, which plays a role of limiting and fixing. The middle pressure plate is connected to the movable column through the mounting plate. The movable column slides in the movable groove of the center seat and is supported and buffered by the buffer spring to ensure the stability of the contact between the middle pressure plate and the cardboard.

[0014] Step 3: The side pressure plates bend the cardboard: After the middle pressure plate fixes the cardboard, the support seat that continues to descend drives the side pressure plates to bend the cardboard. Under the guidance of the support seat, the side pressure plates slide along the support rods to ensure the stability and accuracy of the bending process.

[0015] Step 4: Fix the medium-voltage plate and the mounting plate: Ensure a firm connection between the medium-voltage plate and the mounting plate by clamping the clamping column and the second clamping slot, and threading the second fixing bolt and the threaded groove. Pass the positioning rod through the extension plate and fix it with a limit nut to further enhance the stability of the medium-voltage plate.

[0016] Step 5: When the cardboard is successfully bent, the cylinder drives in the reverse direction to raise the support seat and the entire cardboard bending mechanism, completing a bending operation.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The cardboard bending mechanism of the nailing machine starts the frequency conversion motor to drive the transverse gear to mesh with the longitudinal gear, thereby driving the rotating rod and the two threaded rotating rods to rotate synchronously. Since the threaded sleeve is threadedly connected to the threaded rotating rod, the threaded sleeve will move up and down along the threaded rotating rod, and the side pressure plate is pushed by the moving plate to accurately adjust the position in the support seat. This design enables the side pressure plate to quickly adapt to cardboards of different sizes without changing the mold or the pressure plate, which greatly saves operation time and cost. The side pressure plate slides under the guidance of the support rod to ensure the stability and accuracy of the bending process. This design not only improves the accuracy of cardboard bending, but also reduces the damage to the cardboard caused by improper mold replacement or inaccurate adjustment. The middle pressure plate is connected to the movable column through the mounting plate, and the movable column slides in the movable groove of the center seat and is supported and buffered by the buffer spring. This design effectively reduces the impact force when the middle pressure plate contacts the cardboard, protects the cardboard from damage, and improves the durability and stability of the mechanism. The middle pressure plate first contacts the cardboard and plays a role of limiting and fixing. As the support seat continues to descend, the side pressure plate bends the cardboard. This sequential control ensures that the cardboard will not be deformed or damaged due to uneven force during the bending process. The intermediate pressure plate and the mounting plate are firmly connected by the clamping connection between the clamping column and the second clamping slot and the threaded connection between the second fixing bolt and the threaded slot. This modular design facilitates the disassembly and replacement of parts, reducing maintenance costs. The positioning rod passes through the extension plate and is fixed with a limit nut, further enhancing the stability of the intermediate pressure plate. At the same time, this design also facilitates the inspection and maintenance of the mechanism and extends its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 For the present invention Figure 1 A is a partial enlarged schematic diagram;

[0021] Figure 3 For the present invention Figure 1 A partial enlarged schematic diagram of B in the middle;

[0022] Figure 4 For the present invention Figure 1 A partial enlarged schematic diagram of C in the middle;

[0023] Figure 5 It is a structural stereogram of the side pressure plate of the present invention;

[0024] Figure 6It is a structural stereogram of the pressure plate of the present invention.

[0025] In the figure: 1. base; 2. shell; 3. placing table; 4. slot 1; 5. card plate; 6. fixing bolt 1; 7. support seat; 8. cylinder; 9. piston rod; 10. push rod; 11. side pressure plate; 12. middle pressure plate; 13. groove 1; 14. threaded rotating rod; 15. movable groove; 16. threaded sleeve; 17. movable plate; 18. external plate; 19. support rod; 20. groove 2; 21. rotating rod; 22. frequency conversion motor; 23. main shaft; 24. transverse gear; 25. longitudinal gear; 26. center seat; 27. movable groove; 28. movable column; 29. ​​inner slide groove; 30. slider; 31. limit rod; 32. buffer spring; 33. mounting plate; 34. slot 2; 35. card column; 36. threaded groove; 37. fixing bolt 2; 38. extension plate; 39. positioning rod; 40. limit nut. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-6The present invention provides a technical solution: a cardboard bending mechanism of a nailing machine, comprising a base 1, a shell 2 is fixedly connected to the outer side of the top of the base 1, a placing table 3 is arranged at the center of the top of the base 1, a support seat 7 is arranged at the top position in the shell 2, side pressure plates 11 are arranged at the two sides of the bottom of the support seat 7, grooves 13 are opened at the two sides of the support seat 7, threaded rotating rods 14 are symmetrically rotated in the centers of the two grooves 13, threaded sleeves 16 are sleeved and threadedly connected to the surface of the threaded rotating rod 14, a movable plate 17 is fixedly connected to the bottom of the threaded sleeve 16, movable grooves 15 are opened at the bottoms of the two grooves 13 on both sides of the bottom of the support seat 7, the bottom of the movable plate 17 penetrates to the outside of the movable groove 15 and is fixedly connected to the top of the side pressure plate 11, the support seat A center seat 26 is fixedly connected to the center of the bottom of the center seat 26, a movable column 28 is arranged at the bottom of the center seat 26, a mounting plate 33 is fixedly connected to the bottom of the movable column 28, a middle pressure plate 12 is arranged at the bottom of the mounting plate 33, a movable groove 27 is provided inside the center seat 26, the top of the movable column 28 penetrates into the inside of the movable groove 27 and is slidably connected to the movable groove 27, an inner slide groove 29 is provided at the center of the top of the movable column 28, a slider 30 is slidably connected to the top of the inner slide groove 29, a limiting rod 31 is fixedly connected to the center of the top of the slider 30, the top of the limiting rod 31 penetrates into the inside of the movable groove 27 and is fixedly connected to the top in the movable groove 27, a buffer spring 32 is sleeved on the surface of the limiting rod 31, and the top and bottom of the buffer spring 32 are fixedly connected to the top in the movable groove 27 and the top of the movable column 28 respectively.

[0028] A card slot 4 is provided at the center of the top of the base 1, and a card plate 5 is fixedly connected to the bottom of the placement table 3. The bottom of the card plate 5 passes through the interior of the card slot 4 and is clamped with the card slot 4. The bottoms of both sides of the placement table 3 are threadedly connected with fixing bolts 6, and the bottoms of the fixing bolts 6 pass through the interior of the base 1 and are threadedly connected to the base 1.

[0029] A cylinder 8 is fixedly installed at the center of the top of the shell 2, and a piston rod 9 is fixedly connected to the output end at the bottom of the cylinder 8. The bottom of the piston rod 9 penetrates into the interior of the shell 2 and is fixedly connected to a push rod 10. The bottom of the push rod 10 is fixedly connected to the top of the support seat 7.

[0030] A groove 20 is provided between the two corresponding grooves 13 inside the support seat 7, and a rotating rod 21 is rotatably connected inside the groove 20. Both sides of the rotating rod 21 respectively penetrate into the interior of the two grooves 13 and are fixedly connected to the two threaded rotating rods 14. A frequency conversion motor 22 is fixedly installed on the top of the groove 13, and a main shaft 23 is fixedly connected to the output end of the bottom of the frequency conversion motor 22. A transverse gear 24 is fixedly connected to the bottom of the main shaft 23. A longitudinal gear 25 is fixedly connected to one side of the rotating rod 21, and one side of the bottom of the transverse gear 24 is meshed with one side of the top of the longitudinal gear 25.

[0031] External plates 18 are fixedly connected to both sides of the bottom of the support seat 7 , and support rods 19 are fixedly connected to the front and rear sides between the two external plates 18 . The support rods 19 are sleeved and slidably connected to the two side pressure plates 11 .

[0032] A second card slot 34 is provided at the center of the top of the medium pressure plate 12, and threaded grooves 36 are provided on the four sides of the top of the medium pressure plate 12 corresponding to the second card slot 34. A card column 35 is fixedly connected to the center of the bottom of the mounting plate 33, and the bottom of the card column 35 penetrates into the interior of the second card slot 34 and is clamped with the second card slot 34. Four sides of the top of the mounting plate 33 are threadedly connected with second fixing bolts 37, and the bottom of the second fixing bolts 37 penetrates into the interior of the threaded groove 36 and is threadedly connected to the threaded groove 36. The bottoms of both sides of the center seat 26 are fixedly connected with extension plates 38, and the four sides of the top of the medium pressure plate 12 are fixedly connected with positioning rods 39, and the top of the positioning rods 39 penetrates into the outside of the extension plate 38 and is threadedly connected to the limiting nut 40, and the bottom of the limiting nut 40 contacts the top of the extension plate 38.

[0033] A method for using a cardboard bending mechanism of a box stapler comprises the following steps:

[0034] Step 1. First, place the cardboard to be bent on the placement table 3, ensure that the position of the cardboard is accurate, and adjust the position of the two side pressure plates 11: start the frequency conversion motor 22, and its output end drives the transverse gear 24 to rotate through the main shaft 23, and the transverse gear 24 engages with the longitudinal gear 25, thereby driving the rotating rod 21 to rotate, and the rotating rod 21 drives the two threaded rotating rods 14 to rotate synchronously. Since the threaded sleeve 16 is threadedly connected to the threaded rotating rod 14, the threaded sleeve 16 will move up and down along the threaded rotating rod 14, and the bottom of the threaded sleeve 16 pushes the side pressure plate 11 to move in the support seat 7 through the moving plate 17 until the side pressure plate 11 is adjusted to a suitable position to bend the cardboard.

[0035] Step 2: The output end at the bottom of the cylinder 8 pushes the push rod 10 through the piston rod 9, and the push rod 10 drives the support seat 7 and the entire cardboard bending mechanism to move downward. As the support seat 7 descends, the middle pressure plate 12 first contacts the cardboard, playing a role of limiting and fixing. The middle pressure plate 12 is connected to the movable column 28 through the mounting plate 33. The movable column 28 slides in the movable groove 27 of the center seat 26, and is supported and buffered by the buffer spring 32, ensuring the stability of the contact between the middle pressure plate 12 and the cardboard.

[0036] Step three, the side pressure plate 11 bends the cardboard: after the middle pressure plate 12 fixes the cardboard, the support seat 7 that continues to descend drives the side pressure plate 11 to bend the cardboard. Under the guidance of the support seat 7, the side pressure plate 11 slides along the support rod 19 to ensure the stability and accuracy of the bending process.

[0037] Step 4, fixation of the medium pressure plate 12 and the mounting plate 33: ensure the firm connection between the medium pressure plate 12 and the mounting plate 33 through the clamping connection between the clamping column 35 and the clamping groove 34, and the threaded connection between the fixing bolt 2 37 and the threaded groove 36, pass the positioning rod 39 through the extension plate 38, and use the limit nut 40 to fix it, so as to further enhance the stability of the medium pressure plate 12.

[0038] Step 5: After the paperboard is successfully bent, the cylinder 8 is driven in the reverse direction to raise the support seat 7 and the entire paperboard bending mechanism, thus completing a bending operation.

[0039] In summary, the cardboard bending mechanism of the nailing machine starts the variable frequency motor 22 to drive the transverse gear 24 to mesh with the longitudinal gear 25, thereby driving the rotating rod 21 and the two threaded rotating rods 14 to rotate synchronously. Since the threaded sleeve 16 is threadedly connected to the threaded rotating rod 14, the threaded sleeve 16 will move up and down along the threaded rotating rod 14, and the side pressure plate 11 is pushed by the moving plate 17 to accurately adjust the position in the support seat 7. This design enables the side pressure plate 11 to quickly adapt to cardboards of different sizes without changing the mold or the pressure plate, which greatly saves operation time and cost. The side pressure plate 11 slides under the guidance of the support rod 19 to ensure the bending process The stability and accuracy of the process are improved. This design not only improves the accuracy of cardboard bending, but also reduces cardboard damage caused by improper mold replacement or inaccurate adjustment. The middle pressure plate 12 is connected to the movable column 28 through the mounting plate 33. The movable column 28 slides in the movable groove 27 of the center seat 26 and is supported and buffered by the buffer spring 32. This design effectively reduces the impact force when the middle pressure plate 12 contacts the cardboard, protects the cardboard from damage, and improves the durability and stability of the mechanism. The middle pressure plate 12 first contacts the cardboard to play a role of limiting and fixing. As the support seat 7 continues to descend, the side pressure plate 11 bends the cardboard. This sequential control ensures that the cardboard will not be deformed or damaged due to uneven force during the bending process. The middle pressure plate 12 and the mounting plate 33 are firmly connected by the clamping connection between the clamping column 35 and the second clamping groove 34 and the threaded connection between the second fixing bolt 37 and the threaded groove 36. This modular design facilitates the disassembly and replacement of parts, reducing maintenance costs. The positioning rod 39 passes through the extension plate 38 and is fixed with the limit nut 40, further enhancing the stability of the middle pressure plate 12. At the same time, this design also facilitates the inspection and maintenance of the mechanism and extends its service life.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] The electrical components mentioned in this article are all connected to an external main controller and 220V mains electricity, and the main controller can be a conventional known device for controlling a computer or the like.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cardboard bending mechanism for a carton stitching machine, comprising a base (1), characterized in that: The outer side of the top of the base (1) is fixedly connected with a shell (2), the center of the top of the base (1) is provided with a placing table (3), a support seat (7) is provided at the top position of the shell (2), the bottom of the support seat (7) is provided with side pressure plates (11) at both sides, the support seat (7) is provided with grooves (13) at both sides, the centers of the two grooves (13) are symmetrically connected with threaded rotating rods (14), the surface of the threaded rotating rod (14) is sleeved and threadedly connected with a threaded sleeve (16), the bottom of the threaded sleeve (16) is fixedly connected with a movable plate (17), the bottom of the support seat (7) is provided with movable grooves (15) at the bottoms of the two grooves (13) at both sides, the bottom of the movable plate (17) penetrates to the outside of the movable groove (15) and is fixedly connected to the top of the side pressure plate (11), the center of the bottom of the support seat (7) is fixedly connected with a center seat (26), A movable column (28) is arranged at the bottom of the center seat (26), and a mounting plate (33) is fixedly connected to the bottom of the movable column (28), and a middle pressure plate (12) is arranged at the bottom of the mounting plate (33). A movable groove (27) is provided inside the center seat (26), and the top of the movable column (28) penetrates into the inside of the movable groove (27) and is slidably connected to the movable groove (27). An inner slide groove (29) is provided at the center of the top of the movable column (28), and a slider (30) is slidably connected to the top of the inner slide groove (29). A limiting rod (31) is fixedly connected to the center of the top of the slider (30), and the top of the limiting rod (31) penetrates into the inside of the movable groove (27) and is fixedly connected to the top in the movable groove (27). A buffer spring (32) is sleeved on the surface of the limiting rod (31), and the top and bottom of the buffer spring (32) are respectively fixedly connected to the top in the movable groove (27) and the top of the movable column (28).

2. The cardboard bending mechanism of a carton stapler according to claim 1, characterized in that: A card slot (4) is provided at the center of the top of the base (1); a card plate (5) is fixedly connected to the bottom of the placement platform (3); the bottom of the card plate (5) passes through the interior of the card slot (4) and is carded with the card slot (4); the bottoms of both sides of the placement platform (3) are threadedly connected with fixing bolts (6); the bottoms of the fixing bolts (6) pass through the interior of the base (1) and are threadedly connected to the base (1).

3. The cardboard bending mechanism of a carton stapler according to claim 1, characterized in that: A cylinder (8) is fixedly installed at the center of the top of the shell (2), and a piston rod (9) is fixedly connected to the output end at the bottom of the cylinder (8). The bottom of the piston rod (9) penetrates into the interior of the shell (2) and is fixedly connected to a push rod (10). The bottom of the push rod (10) is fixedly connected to the top of the support seat (7).

4. The cardboard bending mechanism of a carton stapler according to claim 1, characterized in that: A groove 2 (20) is provided between the two grooves 1 (13) corresponding to the inside of the support seat (7); a rotating rod (21) is rotatably connected inside the groove 2 (20); two sides of the rotating rod (21) respectively penetrate into the inside of the two grooves 1 (13) and are fixedly connected to two threaded rotating rods (14); a variable frequency motor (22) is fixedly installed on the top of the groove 1 (13); a main shaft (23) is fixedly connected to the output end of the bottom of the variable frequency motor (22); a transverse gear (24) is fixedly connected to the bottom of the main shaft (23); a longitudinal gear (25) is fixedly connected to one side of the rotating rod (21); one side of the bottom of the transverse gear (24) is meshed with one side of the top of the longitudinal gear (25).

5. The cardboard bending mechanism of a carton stapler according to claim 1, characterized in that: External plates (18) are fixedly connected to both sides of the bottom of the support seat (7), and support rods (19) are fixedly connected to the front and rear sides between the two external plates (18). The support rods (19) are sleeved and slidably connected to the two side pressure plates (11).

6. The cardboard bending mechanism of a carton stapler according to claim 1, characterized in that: A second card slot (34) is provided at the center of the top of the intermediate pressure plate (12), and threaded grooves (36) are provided on four sides of the top of the intermediate pressure plate (12) corresponding to the second card slot (34). A card column (35) is fixedly connected at the center of the bottom of the mounting plate (33), and the bottom of the card column (35) penetrates into the interior of the second card slot (34) and is clamped with the second card slot (34). Two fixing bolts (37) are threadedly connected on four sides of the top of the mounting plate (33), and the fixing bolts (37) are threadedly connected to the fixing bolts (37). The bottom of bolt 2 (37) passes through the inside of the thread groove (36) and is threadedly connected to the thread groove (36), the bottoms of both sides of the center seat (26) are fixedly connected to extension plates (38), and the four sides of the top of the intermediate pressure plate (12) are fixedly connected to positioning rods (39), the top of the positioning rod (39) passes through the outside of the extension plate (38) and is threadedly connected to a limiting nut (40), and the bottom of the limiting nut (40) is in contact with the top of the extension plate (38).

7. The method for using the cardboard bending mechanism of a carton stapler according to any one of claims 1 to 6, characterized in that: The steps include: Step 1, first, place the cardboard to be bent on the placement table (3), ensure that the position of the cardboard is accurate, and adjust the position of the two side pressure plates (11): start the frequency conversion motor (22), and its output end drives the transverse gear (24) to rotate through the main shaft (23), and the transverse gear (24) is meshed with the longitudinal gear (25), thereby driving the rotating rod (21) to rotate, and the rotating rod (21) drives the two threaded rotating rods (14) to rotate synchronously. Since the threaded sleeve (16) is threadedly connected to the threaded rotating rod (14), the threaded sleeve (16) will move up and down along the threaded rotating rod (14), and the bottom of the threaded sleeve (16) pushes the side pressure plate (11) to move in the support seat (7) through the moving plate (17) until the side pressure plate (11) is adjusted to a suitable position so as to bend the cardboard; Step 2: The output end at the bottom of the cylinder (8) pushes the push rod (10) through the piston rod (9), and the push rod (10) drives the support seat (7) and the entire paperboard bending mechanism to move downward. As the support seat (7) descends, the middle pressure plate (12) first contacts the paperboard, playing a role of limiting and fixing. The middle pressure plate (12) is connected to the movable column (28) through the mounting plate (33). The movable column (28) slides in the movable groove (27) of the center seat (26) and is supported and buffered by the buffer spring (32) to ensure the stability of the contact between the middle pressure plate (12) and the paperboard; Step 3, the side pressure plate (11) bends the cardboard: after the middle pressure plate (12) fixes the cardboard, the support seat (7) continues to descend to drive the side pressure plate (11) to bend the cardboard, and the side pressure plate (11) slides along the support rod (19) under the guidance of the support seat (7) to ensure the stability and accuracy of the bending process; Step 4, fixation of the intermediate pressure plate (12) and the mounting plate (33): by clamping the clamping column (35) and the second clamping groove (34), and threading the second fixing bolt (37) and the threaded groove (36), ensure the firm connection between the intermediate pressure plate (12) and the mounting plate (33), penetrate the extension plate (38) through the positioning rod (39), and fix it with the limiting nut (40), so as to further enhance the stability of the intermediate pressure plate (12); Step 5: After the paperboard is successfully bent, the cylinder (8) is driven in the reverse direction to raise the support seat (7) and the entire paperboard bending mechanism, thus completing a bending operation.

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