Deviation rectifying and guiding device and method of bag-making printing machine
By designing a bias correction guide device in the printing press, and using components such as lifting drive motor, threaded rod, sliding block, correction guide plate and torsion spring, it automatically corrects and guides the packaging bags, solving the problem of unsightly printing caused by the tilt of the packaging bag, and achieving an efficient and automatic printing process.
Patent Information
- Application Number
- CN202411939680.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-03-21
AI Technical Summary
When printing packaging bags, existing printing machines can easily incline the packaging bags due to inaccurate manual placement, which will affect the aesthetics and accuracy of the printing.
A bias correction guide device for a bag-making printing machine is designed, including a correction guide plate, a torsion spring, a lift drive motor and a conveying roller. The lift drive motor drives the threaded rod to rotate, so that the sliding block slides in the lifting slide, and the moving lift box moves upward, so as to facilitate the loading of the packaging bag; at the same time, the movement of the packaging bag is driven by the friction between the conveying roller and the rubber sleeve, and the correction guide plate and the torsion spring are used to automatically correct and guide the packaging bag to keep it horizontal.
Effectively prevent the packaging bag from tilting, ensure the beauty and accuracy of printing, simplify the loading process, reduce the physical consumption of staff, and improve printing efficiency and automation performance.
Smart Images
Figure CN119660430A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of printing, and in particular to a deviation-correcting guide device and method for a bag-making printing machine. Background Art
[0002] A printing press is a machine for printing text and images. Modern printing presses are generally composed of mechanisms such as plate loading, inking, embossing, and paper feeding (including folding). Its principle is to first make the text or image to be printed into a printing plate, install it on the printing press, and then apply ink to the place where there is text and image on the printing plate manually or by the printing press, and then directly or indirectly transfer it to paper or other substrates (such as textiles, metal plates).
[0003] When printing a trademark on a packaging bag, a printing press is usually required. However, when using some existing printing presses, paper packaging bags are usually placed on a conveyor belt manually, and the conveyor belt drives the packaging bags to move, and then the packaging bags are moved under the printing press, and the packaging bags are printed by the printing press. However, when placing the paper packaging bags on the conveyor belt, the manual placement may easily cause the packaging bags to be slightly tilted, which may cause the trademark to be tilted when printing the trademark later, resulting in unsightly printing.
[0004] In view of the above problems, a deviation correction guide device and method for a bag making and printing machine are proposed. Summary of the invention
[0005] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a deviation correction guide device and method for a bag-making printing machine, which can solve the problems of the background technology.
[0006] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a deviation correction guide device for a bag-making printing machine comprises a printing workbench, the bottom of the printing workbench is fixedly connected with a workbench supporting leg, the top of the printing workbench is fixedly installed with a conveyor belt bracket, a printing machine is arranged inside the conveyor belt bracket, and the printing machine is arranged on the conveyor belt bracket, a fixed support block is fixedly installed on one side of the printing workbench, a lifting slide is provided on one side of the fixed support block, a sliding block is slidably connected inside the lifting slide, a mobile lifting box is fixedly installed on one side of the sliding block, a threaded rod is rotatably connected inside the lifting slide, the surface of the threaded rod is connected to the internal thread of the sliding block, a lifting drive motor is fixedly installed on the bottom of the fixed support block, the output end of the lifting drive motor is fixedly connected to the threaded rod, two slide grooves are provided inside the mobile lifting box, the lifting support plates are slidably connected inside the two slide grooves, the lifting support plates are slidably connected inside the mobile lifting box, elastic springs are fixedly installed inside the two slide grooves, and the lower ends of the two elastic springs are respectively fixedly connected to the inner walls of the two slide grooves.
[0007] Preferably, a driving motor is fixedly installed on one side of the mobile lifting box, a second rotating shaft is fixedly installed on the output end of the driving motor, the second rotating shaft rotates through the mobile lifting box and extends to the inside of the other side of the mobile lifting box, and a conveying roller is fixedly sleeved on the surface of the second rotating shaft.
[0008] Preferably, a rubber sleeve is fixedly sleeved on the surface of the conveying roller.
[0009] Preferably, the movable lifting box is rotatably connected to a first rotating shaft on one side opposite to the other, the two first rotating shafts are fixedly sleeved with a first gear, the two second rotating shafts are fixedly sleeved with a second gear, the two second gears are respectively meshed and connected with the two first gears, and the two first rotating shafts are fixedly sleeved with an eccentric wheel.
[0010] Preferably, two limiting support frames are fixedly mounted on the conveyor belt bracket, and a moving push rod is slidably connected to the two limiting support frames, and a pushing slide is provided on the surface of the moving push rod.
[0011] Preferably, two fixed support plates are fixedly installed on the conveyor belt bracket, and the interiors of the two fixed support plates are rotatably connected to the third rotating shaft, and the lower ends of the two third rotating shafts are fixedly installed with correction guide plates, and the two correction guide plates are arranged in an eight-shaped shape.
[0012] Preferably, torsion springs are movably sleeved on the two third rotating shafts, the upper ends of the two torsion springs are respectively fixedly connected to the two third rotating shafts, and the lower ends of the two torsion springs are respectively fixedly connected to the tops of the two fixed support plates.
[0013] Preferably, the two correction guide plates are rotatably connected with sliding rollers, and the two sliding rollers are respectively slidably connected inside the two pushing slides.
[0014] Preferably, two push guide rods are fixedly mounted on the movable push rod, and the ends of the two push guide rods away from the movable push rod are both rotatably connected to rotating rollers.
[0015] A deviation correction and guiding method for a bag-making printing machine comprises the following steps:
[0016] Step 1: The raised part on the eccentric wheel squeezes the rotating roller, and the moving push rod is restricted by two limiting support frames, so that the moving push rod moves horizontally;
[0017] Step 2: When the two push slides follow the moving push rod to move, the two sliding rollers slide inside the two push slides respectively, so that the two correction guide plates rotate around the two third rotation axes respectively, and the two torsion springs are deformed;
[0018] Step 3: When the packaging bag moves through the conveyor belt and enters between the two correction guide plates, the eccentric wheel no longer squeezes the rotating roller, so that the correction guide plate is reset by the torsion of the torsion spring;
[0019] Step 4: Make the two straight plates on the correction guide plate squeeze the packaging bag to complete the deviation correction and guidance of the packaging bag.
[0020] Compared with the prior art, the present invention has the following beneficial effects:
[0021] (1) The deviation correction guide device and method of the bag-making printing machine, when the two correction guide plates are reset, the two straight plates on the correction guide plates will squeeze the packaging bag, and then squeeze the paper packaging bag into a horizontal state, so as to facilitate the correction of the packaging bag, prevent the packaging bag from tilting and causing printing deviation, ensure the beauty of printing, and facilitate the guidance of the packaging bag, so as to facilitate the printing processing of the packaging bag.
[0022] (2) The deviation correction guide device and method of the bag-making printing machine starts the lifting drive motor, so that the lifting drive motor drives the threaded rod to rotate, and then the sliding block is restricted by the lifting slide, so that the sliding block slides inside the lifting slide, and then the movable lifting box moves upward, which is convenient for moving the packaging bag upward, and then it is convenient for loading, reducing the difficulty of lifting for the staff and saving the physical strength of the staff.
[0023] (3) The deviation correction guide device and method of the bag-making printing machine rotate the conveying roller and the rubber sleeve, and then use the friction of the rubber sleeve to push the packaging bag to move, and then move the packaging bag to the conveyor belt, so as to realize the loading of the packaging bag, thereby reducing the difficulty of loading, improving the automatic performance of the device, and thus improving the efficiency of packaging bag processing and reducing printing time.
[0024] (4) The deviation correction guide device and method of the bag-making printing machine, through the setting of the rotating roller 7, facilitates the friction between the eccentric wheel 19 and the pushing guide rod 6, thereby facilitating the movement of the pushing guide rod 6. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments:
[0026] Figure 1 It is a structural schematic diagram of a deviation correction guide device of a bag making and printing machine of the present invention;
[0027] Figure 2 For the present invention Figure 1 The enlarged schematic diagram at A in the middle;
[0028] Figure 3 For the present invention Figure 1 The enlarged schematic diagram of point B in the middle;
[0029] Figure 4 For the present invention Figure 3 The enlarged schematic diagram at C in the middle;
[0030] Figure 5 It is a schematic diagram of a mobile lifting box of the present invention;
[0031] Figure 6 For the present invention Figure 5 Enlarged schematic diagram at point D in the middle.
[0032] 1. Printing table; 2. Table support leg; 3. Printing machine; 4. Conveyor belt bracket; 5. Conveyor belt; 6. Push guide rod; 7. Rotating roller; 8. Fixed support block; 9. Lifting slide; 10. Conveyor roller; 11. Drive motor; 12. Lifting drive motor; 13. Mobile lifting box; 14. Slide; 15. Elastic spring; 16. Lifting support plate; 17. First gear; 18. First rotating shaft; 19. Eccentric wheel; 20. Second gear; 21. Second rotating shaft; 22. Mobile push rod; 23. Correction guide plate; 24. Pushing slide; 25. Limiting support frame; 26. Fixed support plate; 27. Third rotating shaft; 28. Torsion spring; 29. Sliding roller; 30. Threaded rod; 31. Sliding block. DETAILED DESCRIPTION
[0033] 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.
[0034] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings.
[0035] See also Figure 1-6The present invention provides a technical solution: a deviation correction guide device for a bag-making printing machine, comprising a printing table 1, a table support leg 2 is fixedly connected to the bottom of the printing table 1, a conveyor belt bracket 4 is fixedly installed on the top of the printing table 1, a printing machine 3 is arranged inside the conveyor belt bracket 4, and a printing machine 3 is arranged on the conveyor belt bracket 4, a fixed support block 8 is fixedly installed on one side of the printing table 1, a lifting slide 9 is opened on one side of the fixed support block 8, a sliding block 31 is slidably connected inside the lifting slide 9, a movable lifting box 13 is fixedly installed on one side of the sliding block 31, and the lifting slide 9 A threaded rod 30 is rotatably connected inside the slider 31, and the surface of the threaded rod 30 is connected to the internal thread of the sliding block 31. A lifting drive motor 12 is fixedly installed on the bottom of the fixed support block 8, and the output end of the lifting drive motor 12 is fixedly connected to the threaded rod 30. Two slide grooves 14 are provided inside the mobile lifting box 13, and the lifting support plates 16 are slidably connected inside the two slide grooves 14. The lifting support plates 16 are slidably connected inside the mobile lifting box 13, and elastic springs 15 are fixedly installed inside the two slide grooves 14, and the lower ends of the two elastic springs 15 are fixedly connected to the inner walls of the two slide grooves 14 respectively.
[0036] The paper packaging bag is placed on the lifting support plate 16, and the paper packaging bag presses the lifting support plate 16, thereby causing the lifting support plate 16 to move downward, thereby pressing the elastic spring 15, thereby facilitating the paper packaging bag to be placed on the movable lifting box 13 and forming a pressure on the paper packaging bag.
[0037] When lifting, start the lifting drive motor 12, so that the lifting drive motor 12 drives the threaded rod 30 to rotate, and then the sliding block 31 is restricted by the lifting slide 9, so that the sliding block 31 slides inside the lifting slide 9, and then the mobile lifting box 13 moves upward, which is convenient for moving the packaging bag upward, and then it is convenient for loading, reducing the difficulty of lifting for the staff and saving the staff's physical strength.
[0038] A driving motor 11 is fixedly installed on one side of the mobile lifting box 13, and a second rotating shaft 21 is fixedly installed on the output end of the driving motor 11. The second rotating shaft 21 rotates through the mobile lifting box 13 and extends to the inside of the other side of the mobile lifting box 13. A conveying roller 10 is fixedly sleeved on the surface of the second rotating shaft 21, and a rubber sleeve is fixedly sleeved on the surface of the conveying roller 10.
[0039] The lifting support plate 16 always has an upward force due to the elastic force of the elastic spring 15, which will cause the packaging bag on the lifting support plate 16 to contact the surface of the conveying roller 10, and then start the driving motor 11, so that the driving motor 11 drives the second rotating shaft 21 to rotate, and then the conveying roller 10 and the rubber sleeve are rotated, and then the friction force of the rubber sleeve is used to push the packaging bag to move, and then the packaging bag is moved to the conveyor belt 5, so as to realize the loading of the packaging bag, thereby reducing the difficulty of loading, improving the automatic performance of the device, and then improving the efficiency of packaging bag processing and reducing printing time.
[0040] The first rotating shafts 18 are rotatably connected on the opposite side of the movable lifting box 13, and the first gears 17 are fixedly sleeved on the two first rotating shafts 18. The second gears 20 are fixedly sleeved on the two second rotating shafts 21. The two second gears 20 are respectively meshed and connected with the two first gears 17, and the eccentric wheels 19 are fixedly sleeved on the two first rotating shafts 18.
[0041] By disposing the first gear 17 and the second gear 20 , the eccentric wheel 19 can be driven to rotate by rotating the second rotating shaft 21 , and the eccentric wheel 19 can be driven to rotate in the opposite direction to the conveying roller 10 , thereby facilitating driving the eccentric wheel 19 to rotate in the opposite direction to the conveying roller 10 .
[0042] Two limiting support frames 25 are fixedly installed on the conveyor belt bracket 4, and the two limiting support frames 25 are slidably connected with a moving push rod 22, and a pushing slideway 24 is provided on the surface of the moving push rod 22. Two fixed support plates 26 are fixedly installed on the conveyor belt bracket 4, and the interiors of the two fixed support plates 26 are rotatably connected with a third rotating shaft 27, and the lower ends of the two third rotating shafts 27 are fixedly installed with a correction guide plate 23, and the two correction guide plates 23 are arranged in an eight-shaped shape. Torsion springs 28 are movably sleeved on the two third rotating shafts 27, and the upper ends of the two torsion springs 28 are respectively fixedly connected to the two third rotating shafts 27, and the lower ends of the two torsion springs 28 are respectively fixedly connected to the tops of the two fixed support plates 26. Sliding rollers 29 are rotatably connected to the two correction guide plates 23, and the two sliding rollers 29 are respectively slidably connected inside the two pushing slideways 24. Two pushing guide rods 6 are fixedly installed on the moving push rod 22, and the two pushing guide rods 6 are rotatably connected with a rotating roller 7 on one end away from the moving push rod 22.
[0043] When the mobile lifting box 13 rises to the highest point, the rotating roller 7 and the center of the eccentric wheel 19 are in the same straight line, and when the eccentric wheel 19 rotates, the raised part on the eccentric wheel 19 squeezes the rotating roller 7, and then squeezes the pushing guide rod 6 and the moving push rod 22. Since the moving push rod 22 is restricted by the two limiting support frames 25, the moving push rod 22 can only move horizontally, and then the moving push rod 22 moves horizontally along the two limiting support frames 25, and then the two pushing slides 24 move, and then the two sliding rollers 29 slide inside the two pushing slides 24 respectively, and then the two correction guide plates 23 rotate around the two third rotating shafts 27 respectively, and then the two torsion springs 28 are deformed, and then the two correction guide plates 23 are tilted. The shape changes to a vertical shape, and then when the packaging bag moves through the conveyor belt 5 and enters between the two correction guide plates 23, as the eccentric wheel 19 continues to rotate, the eccentric wheel 19 no longer squeezes the rotating roller 7, and the correction guide plate 23 is reset by the torsion action of the torsion spring 28, and the moving push rod 22 and the two pushing guide rods 6 are reset, and the rotating roller 7 is reset. When the two correction guide plates 23 are reset, the two straight plates on the correction guide plates 23 squeeze the packaging bag, and then the paper packaging bag is squeezed into a horizontal shape, which is convenient for correcting the packaging bag, preventing the packaging bag from tilting and causing printing deviation, ensuring the beauty of printing, and at the same time facilitating the guidance of the packaging bag, and then facilitating the printing processing of the packaging bag.
[0044] By rotating the roller 7, the friction between the eccentric wheel 19 and the pushing guide rod 6 is facilitated, thereby facilitating the movement of the pushing guide rod 6.
[0045] A deviation correction and guiding method for a bag-making printing machine comprises the following steps:
[0046] Step 1: The raised portion on the eccentric wheel 19 squeezes the rotating roller 7, and the moving push rod 22 is restricted by the two limiting support frames 25, so that the moving push rod 22 moves horizontally;
[0047] Step 2: When the two push slides 24 follow the moving push rod 22 to move, the two sliding rollers 29 slide inside the two push slides 24 respectively, so that the two correction guide plates 23 rotate around the two third rotation axes 27 respectively, and the two torsion springs 28 are deformed;
[0048] Step 3: When the packaging bag moves through the conveyor belt 5 and enters between the two correction guide plates 23, the eccentric wheel 19 no longer squeezes the rotating roller 7, so that the correction guide plate 23 is reset by the torsion of the torsion spring 28;
[0049] Step 4: The two straight plates on the correction guide plate 23 are pressed against the packaging bag to complete the deviation correction and guidance of the packaging bag.
[0050] Working principle:
[0051] The paper packaging bag is placed on the lifting support plate 16, and the paper packaging bag presses the lifting support plate 16, thereby causing the lifting support plate 16 to move downward, thereby pressing the elastic spring 15, and starting the lifting drive motor 12, so that the lifting drive motor 12 drives the threaded rod 30 to rotate, and then because the sliding block 31 is restricted by the lifting slide 9, the sliding block 31 slides inside the lifting slide 9, thereby causing the movable lifting box 13 to move upward, so as to facilitate the upward movement of the packaging bag and facilitate loading.
[0052] The lifting support plate 16 always has an upward force due to the elastic force of the elastic spring 15, which will cause the packaging bag on the lifting support plate 16 to contact the surface of the conveying roller 10, and then start the driving motor 11, so that the driving motor 11 drives the second rotating shaft 21 to rotate, and then the conveying roller 10 and the rubber sleeve are rotated, and then the friction force of the rubber sleeve is used to push the packaging bag to move, and then the packaging bag is moved to the conveyor belt 5, so as to realize the loading of the packaging bag.
[0053] When the mobile lifting box 13 rises to the highest point, the rotating roller 7 and the center of the eccentric wheel 19 are in the same straight line, and when the eccentric wheel 19 rotates, the raised part on the eccentric wheel 19 squeezes the rotating roller 7, and then squeezes the pushing guide rod 6 and the moving push rod 22. Since the moving push rod 22 is restricted by the two limiting support frames 25, the moving push rod 22 can only move horizontally, and then the moving push rod 22 moves horizontally along the two limiting support frames 25, and then the two pushing slides 24 move, and then the two sliding rollers 29 slide inside the two pushing slides 24 respectively, and then the two correction guide plates 23 rotate around the two third rotating shafts 27 respectively, and then The two torsion springs 28 are deformed, and the two correction guide plates 23 are changed from inclined to vertical. When the packaging bag moves between the two correction guide plates 23 through the conveyor belt 5, the eccentric wheel 19 continues to rotate, so that the eccentric wheel 19 no longer squeezes the rotating roller 7, and the correction guide plate 23 is reset by the torsion action of the torsion spring 28, and the moving push rod 22 and the two pushing guide rods 6 are reset, and the rotating roller 7 is reset. When the two correction guide plates 23 are reset, the two straight plates on the correction guide plates 23 squeeze the packaging bag, and the paper packaging bag is squeezed into a horizontal state, which is convenient for correcting the packaging bag.
[0054] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A deviation correction guide device for a bag-making printing machine, comprising a printing workbench (1), characterized in that: The bottom of the printing workbench (1) is fixedly connected to a workbench support leg (2), the top of the printing workbench (1) is fixedly installed with a conveyor belt bracket (4), the interior of the conveyor belt bracket (4) is provided with a printing machine (3), the conveyor belt bracket (4) is provided with a printing machine (3), a fixed support block (8) is fixedly installed on one side of the printing workbench (1), a lifting slideway (9) is provided on one side of the fixed support block (8), the interior of the lifting slideway (9) is slidably connected to a sliding block (31), one side of the sliding block (31) is fixedly installed with a movable lifting box (13), the interior of the lifting slideway (9) is rotatably connected to a threaded rod (30), the threaded rod (30) is rotatably connected to the inside of the lifting slideway (9), and the threaded rod (30) is rotatably connected to the inside of the lifting slideway (9). The surface of the rod (30) is connected to the internal thread of the sliding block (31); a lifting drive motor (12) is fixedly installed at the bottom of the fixed support block (8); the output end of the lifting drive motor (12) is fixedly connected to the threaded rod (30); two slide grooves (14) are provided inside the mobile lifting box (13); the insides of the two slide grooves (14) are slidably connected with a lifting support plate (16); the lifting support plate (16) is slidably connected inside the mobile lifting box (13); elastic springs (15) are fixedly installed inside the two slide grooves (14); the lower ends of the two elastic springs (15) are respectively fixedly connected to the inner walls of the two slide grooves (14).
2. The deviation correcting guide device for a bag making and printing machine according to claim 1, characterized in that: A driving motor (11) is fixedly mounted on one side of the mobile lifting box (13); a second rotating shaft (21) is fixedly mounted on the output end of the driving motor (11); the second rotating shaft (21) rotates through the mobile lifting box (13) and extends to the inside of the other side of the mobile lifting box (13); a conveying roller (10) is fixedly sleeved on the surface of the second rotating shaft (21).
3. The deviation correcting guide device for a bag making and printing machine according to claim 2, characterized in that: A rubber sleeve is fixedly sleeved on the surface of the conveying roller (10).
4. The deviation correction guide device and method for a bag making printing machine according to claim 3, characterized in that: The movable lifting box (13) is rotatably connected to a first rotating shaft (18) on one side opposite to the other, a first gear (17) is fixedly sleeved on the two first rotating shafts (18), a second gear (20) is fixedly sleeved on the two second rotating shafts (21), the two second gears (20) are respectively meshed and connected with the two first gears (17), and an eccentric wheel (19) is fixedly sleeved on the two first rotating shafts (18).
5. The deviation correcting guide device for a bag making and printing machine according to claim 4, characterized in that: Two limiting support frames (25) are fixedly mounted on the conveyor belt support (4), and a moving push rod (22) is slidably connected to the two limiting support frames (25), and a pushing slideway (24) is provided on the surface of the moving push rod (22).
6. The deviation-correcting guide device for a bag-making printing machine according to claim 5, characterized in that: Two fixed support plates (26) are fixedly mounted on the conveyor belt support (4), the interiors of the two fixed support plates (26) are rotatably connected to a third rotating shaft (27), the lower ends of the two third rotating shafts (27) are fixedly mounted with a correction guide plate (23), and the two correction guide plates (23) are arranged in an eight-shaped shape.
7. The deviation correcting guide device for a bag making and printing machine according to claim 6, characterized in that: The two third rotating shafts (27) are both movably sleeved with torsion springs (28), the upper ends of the two torsion springs (28) are respectively fixedly connected to the two third rotating shafts (27), and the lower ends of the two torsion springs (28) are respectively fixedly connected to the tops of the two fixed support plates (26).
8. The deviation-correcting guide device for a bag-making printing machine according to claim 7, characterized in that: The two correction guide plates (23) are both rotatably connected with sliding rollers (29), and the two sliding rollers (29) are respectively slidably connected inside the two pushing slideways (24).
9. The deviation correcting guide device for a bag making and printing machine according to claim 7, characterized in that: Two push guide rods (6) are fixedly mounted on the movable push rod (22), and the ends of the two push guide rods (6) away from the movable push rod (22) are both rotatably connected to a rotating roller (7).
10. The method for guiding and correcting a bag-making printing machine according to claim 9, characterized in that: The following steps are involved: Step 1: The raised portion on the eccentric wheel (19) squeezes the rotating roller (7), and the movable push rod (22) is restricted by the two limiting support frames (25), so that the movable push rod (22) moves horizontally; Step 2: When the two push slides (24) follow the moving push rod (22) to move, the two sliding rollers (29) slide inside the two push slides (24) respectively, so that the two correction guide plates (23) rotate around the two third rotation axes (27) respectively, and the two torsion springs (28) are deformed; Step 3: When the packaging bag moves through the conveyor belt (5) and enters between the two correction guide plates (23), the eccentric wheel (19) no longer squeezes the rotating roller (7), so that the correction guide plate (23) is reset by the torsion of the torsion spring (28); Step 4: The two straight plates on the correction guide plate (23) are pressed against the packaging bag to complete the deviation correction and guidance of the packaging bag.