Folding knife mechanism capable of automatically positioning and used for bag opening machine

Abstract

The utility model discloses an automatic positioning folding knife mechanism for a bag opening machine, which comprises a support seat, a lifting component, an adjusting component and a folding knife component, the lifting component drives the adjusting component and the folding knife component to move up and down, and the adjusting component drives a front folding knife group and a rear folding knife group to be adjustable in length in the transverse direction. The distance between the front folding knife set and the rear folding knife set is adjustable in the longitudinal direction, and the two laser position indicators are located on the two sides of the adjusting assembly and located over the side edges of the front folding knife set and the rear folding knife set. Through the modularized adjusting assembly and the laser positioning technology, rapid self-adaptive adjustment of the length and the distance of the folding knives is achieved, the bag opening precision and efficiency are remarkably improved, the comprehensive performance of the bag opening machine is improved, and the application range of the bag opening machine is widened.

Description

Technical Field

[0001] This utility model belongs to the field of intelligent sewing equipment technology, specifically relating to an automatic positioning folding knife mechanism for a bag opening machine, which is suitable for the automated processing of folded structures in the sewing of pockets, zippers and other processes. Background Technology

[0002] In the garment manufacturing industry, pocket opening machines are key equipment for sewing pockets. Their core functions include cutting the pocket opening, folding the edges, and sewing shaping. Traditional pocket opening machines often use fixed-size folding knife mechanisms, relying on manual adjustment of the folding knife position and spacing. This is inefficient and lacks precision, especially when processing pockets of different sizes or complex pocket shapes with zippers. Positioning errors can easily lead to misalignment or wrinkles. The pocket folding mechanism disclosed in patent CN202220630108.9 uses four sets of folding knives in conjunction with lifting and lateral movement components to complete the folding. However, it requires multiple horizontal lateral movements to exit the pocket opening, resulting in long processing times and easy stretching and deformation of the flexible fabric, affecting the flatness of the pocket opening.

[0003] The sewing of zippered pockets requires extremely high positioning accuracy. Traditional methods require manual alignment of the zipper and pocket opening, often resulting in errors exceeding ±2mm, leading to skewing or zipper jamming. Although laser technology is increasingly being applied to pocket opening machines (such as patent CN221854976U), it is primarily used in the cutting stage. The folding stage still lacks an integrated positioning module, making it difficult to achieve full-process automation. Furthermore, the adjustment components of existing equipment (such as lead screws and guide rails) are often scattered, making maintenance difficult. The dispersed drive sources result in low maintenance efficiency and affect the stability of the production line. Utility Model Content

[0004] This invention provides an automatically positioning folding knife mechanism for a bag opener. Through modular adjustment components and laser positioning technology, it achieves rapid adaptive adjustment of the folding knife length and spacing, significantly improving the bag opening accuracy and efficiency, and enhancing the overall performance and applicability of the bag opener.

[0005] The technical solution provided by this utility model is as follows:

[0006] An automatically positioning folding knife mechanism for a bag opener includes a support base, a lifting component, an adjusting component, and a folding knife assembly. The lifting component is fixedly installed at the front end of the support base, and the adjusting component is fixedly installed at the front end of the lifting component. The folding knife assembly is fixedly installed at the lower end of the adjusting component. The folding knife assembly includes a front folding knife group and a rear folding knife group, which are arranged parallel to each other with a gap. The lifting component drives the adjusting component and the folding knife assembly to move up and down. The adjusting component allows the length of the front and rear folding knife groups to be adjusted in the horizontal direction, and the distance between the front and rear folding knife groups to be adjusted in the vertical direction. It also includes two laser positioning devices located on both sides of the adjusting component and directly above the sides of the front and rear folding knife groups.

[0007] Preferably, the support base includes a support base, a fixed rod, a rotating seat, and a rear side plate. The fixed rod is fixedly installed at the front end of the support base, and the rotating seat is sleeved on the fixed rod. The rotating seat is T-shaped and is vertically fixedly connected to the rear side plate.

[0008] More preferably, the lifting assembly includes a lifting cylinder, a guide rail, a lifting base plate, and a cylinder seat. The lifting cylinder is fixedly installed on the cylinder seat, which is fixed to the top of the rear side plate. The rear side plate is vertically arranged and has a slider installed on it. The lifting base plate is fixed on the slider, and a connecting plate is fixed to the bottom of the lifting base plate. The connecting plate is connected to the adjustment assembly.

[0009] More preferably, the front folding blade assembly and the rear folding blade assembly are each composed of two folding blades that are partially attached and arranged in parallel on a horizontal line.

[0010] More preferably, the adjustment assembly consists of a lead screw motor, a bidirectional threaded lead screw, two cylinder fixing blocks, two lifting cylinders, two front folding blade connecting plates, two front folding blade fixing plates, and two rear folding blade fixing plates. The laser positioning device is fixed on the connecting rod on the outside of the front folding blade connecting plate. The lead screw motor and the bidirectional threaded lead screw are both fixed on the connecting plate. The two cylinder fixing blocks are symmetrically fixed to the bidirectional threaded lead screw, so that the cylinder fixing blocks can slide synchronously in opposite directions along the connecting seat. The other end of the cylinder fixing block is connected to the lifting cylinder, and the other end of the lifting cylinder is connected to the front folding blade connecting plate. The front folding blade connecting plate is connected to the front folding blade fixing plate. The two front folding blade fixing plates are fixed on both sides of the front folding blade assembly in a symmetrical position. The two front folding blade fixing plates are provided with guide rails, and the two front folding blade fixing plates can slide along the guide rails. The two rear folding blade fixing plates are fixed on both sides of the rear folding blade assembly in a symmetrical position. The two rear folding blade fixing blocks are provided with guide rails, and the two rear folding blade fixing blocks can slide along the guide rails.

[0011] More preferably, a guide rail five is connected between the front folding blade fixing plate and the rear folding blade fixing plate, which are in the same direction, and a slider three is also provided, which is placed on the rear folding blade fixing plate. The guide rail five can slide along the slider three, thereby realizing the connection between the front folding blade group and the rear folding blade group.

[0012] More preferably, it also includes a motor, a drive screw, a fixed base, two guide rail connecting plates, two guide rails (four), and two sliders (two). The two sliders (two) are located on both sides of the motor. The two guide rails (four) are parallel and pass through the two sliders (two). Two guide rail connecting plates are vertically arranged at the bottom of the two guide rails (four). The two guide rail connecting plates are fixed on the two guide rails (two) and the guide rails (three). A fixed base is vertically arranged on the guide rail connecting plate connected to the guide rails (two). One end of the drive screw is connected to the motor, and the other end passes through the fixed base and is fixed.

[0013] More preferably, the bracket base is provided with a plurality of grooves, and the bracket base is connected to the standby device by nuts, the position of the nuts in the grooves being adjustable.

[0014] More preferably, a number of grooves are provided at the connection between the rotating seat and the rear side plate. The rotating seat is connected to the rear side plate through a nut, and the position of the nut in the groove is adjustable.

[0015] Compared with the prior art, the present invention has the following technical advantages:

[0016] (1) The folding knife assembly in this utility model is connected to a bidirectional spiral screw. When the screw motor drives the bidirectional spiral screw to rotate, the cylinder fixing block has a thread inside, and the thread direction is opposite to the thread direction on the bidirectional spiral screw it is connected to. Under the engagement of the internal thread and the thread of the bidirectional spiral screw, the cylinder fixing block achieves reverse synchronous movement, which in turn drives the two front folding knife connecting plates and the two front folding knife fixing plates to move in opposite synchronous movement along the guide rail. The front folding knife group is connected to the front folding knife fixing plate and will move in opposite synchronous movement with the front folding knife fixing plate. The front folding knife fixing plate and the rear folding knife fixing plate are connected by a guide rail. The rear folding knife fixing plate is connected to the rear folding knife group, which in turn drives the rear folding knife group to move in opposite synchronous movement, thus easily achieving precise adjustment of the folding knife assembly in the length direction. Whether it is a wide pocket or a narrow pocket, the folding knife can quickly adapt, greatly improving the ability of the bag opening machine to handle the folding of different sized pockets and significantly improving production efficiency.

[0017] (2) This utility model utilizes the coordinated operation of a motor and a drive screw to precisely adjust the distance between the front and rear folding knife groups. The motor drives the drive screw, which, through a series of guide rail connecting plates, fixed seats, and other structures, causes the rear folding knife group to move precisely in the longitudinal direction relative to the front folding knife group, ensuring that the folding knife spacing matches the depth of various pockets and making the folding effect more in line with design requirements.

[0018] (3) The laser positioning device of this utility model is cleverly fixed on the outside of the front folding knife connecting plate. When the folding knife assembly moves due to the adjustment of length or spacing, the laser positioning device adjusts its position synchronously. Its radiation position automatically adapts to the change of the folding knife and always accurately points to the place where the zipper and pocket flap should be placed, which greatly improves the accuracy of the zipper installation position during the sewing process and ensures the quality of the garment.

[0019] (4) The overall structure of this utility model is compact, and the components cooperate in a compact and reasonable manner. The drive source is centrally located, which reduces energy loss in the power transmission path and effectively improves transmission efficiency. During operation, the power can be quickly and stably transmitted to each actuator, ensuring that the bag opening machine's folding knife mechanism works efficiently and stably, and reducing energy consumption.

[0020] (5) This utility model is provided with multiple grooves. Groove 1 on the bracket base facilitates the adjustment of the front and rear installation position of the mechanism on the bag opening machine. Groove 2 at the connection between the rotating seat and the rear side plate can adjust the left and right installation position of the mechanism on the bag opening machine. The setting of the fixed plate and the rotating seat can adjust the placement angle of the mechanism on the bag opening machine to ensure that the folding knife assembly is set vertically. The above adjustment structure enables the mechanism to flexibly adapt to different bag opening machine equipment and diverse working scenarios, greatly enhancing the practicality and versatility of the mechanism. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of the present invention.

[0022] Figure 2 This is a schematic diagram of the adjustment component and folding knife component of this utility model.

[0023] Figure 3 This is another structural schematic diagram of the adjustment component and folding knife component of this utility model.

[0024] Figure 4 This is a side view of the present invention.

[0025] Figure 5 This is a schematic diagram of the structure of the support base of this utility model.

[0026] The components are as follows: 1. Support base; 2. Fixed rod; 3. Rotating seat; 4. Rear side plate; 5. Cylinder 1; 6. Guide rail 1; 7. Slider 1; 8. Lifting base plate; 9. Cylinder seat; 10. Connecting plate; 11. Front folding blade assembly; 12. Rear folding blade assembly; 13. Screw motor; 14. Bidirectional spiral screw; 15. Cylinder fixing block; 16. Cylinder 2; 17. Front folding blade connecting plate; 18. Front folding blade fixing plate; 19. Rear folding blade fixing plate; 20. Guide rail 2; 21. Guide rail 3; 22. Guide rail 4; 23. Guide rail 5; 24. Slider 2; 25. Slider 3; 26. Motor; 27. Drive screw; 28. Laser positioning device; 29. ​​Positioning connecting rod; 29. ​​Fixed seat; 30. Guide rail connecting plate; 31. Groove 1; 32. Groove 2. Detailed Implementation

[0027] The present invention will now be further described in conjunction with specific embodiments and accompanying drawings.

[0028] like Figure 1 As shown, this utility model discloses an automatically positioning folding knife mechanism for a bag opening machine, including a support base, a lifting assembly, an adjusting assembly, and a folding knife assembly. The support base includes a support base 1, a fixed rod 2, a rotating seat 3, and a rear side plate 4. The fixed rod 2 is fixedly installed at the front end of the support base 1, and the rotating seat 3 is sleeved on the fixed rod 2. The rotating seat 3 is T-shaped and is vertically fixedly connected to the rear side plate 4. When in working condition, the rear side plate 4 needs to be perpendicular to the platform on which the sewing fabric is placed.

[0029] The lifting assembly includes a cylinder 5, two guide rails 6, two sliders 7, a lifting base plate 8, and a cylinder seat 9. The cylinder seat 9 is fixed to the top of the rear side plate 4, and the cylinder 5 is fixedly mounted on the cylinder seat 8. Two parallel guide rails 6 are fixed on the rear side plate 4, and the two sliders 7 are fixed on the guide rails 6 and slide up and down along the guide rails 6. The lifting base plate 8 is fixed on the two sliders 7, and a connecting plate 10 is fixed to the bottom of the lifting base plate 8. The cylinder 5 is connected to the connecting plate 10. Thus, when the cylinder 5 drives the connecting plate 10 to move up and down, the lifting base plate 8 will also slide up and down along the rear side plate 4. The connecting plate 10 is connected to the adjustment assembly, which in turn drives the adjustment assembly and the folding knife assembly connected to the adjustment assembly to slide up and down as well, thereby completing the vertical position adjustment of the folding knife assembly.

[0030] The folding knife assembly consists of a front folding knife group 11 and a rear folding knife group 12. The front folding knife group is composed of two "L"-shaped folding knives that are partially attached and parallel to each other on a horizontal line. The rear folding knife group 12 has the same structure.

[0031] The adjustment assembly consists of a lead screw motor 13, a double-sided spiral lead screw 14, two cylinder fixing blocks 15, two cylinders 16, two front folding blade connecting plates 17, two front folding blade fixing plates 18, and two rear folding blade fixing plates 19. A laser positioning device 28 is fixed to a positioning connecting rod 29 on the outside of the front folding blade connecting plate 18, and its position on the positioning connecting rod 29 is adjustable. The lead screw motor 13 and the double-sided spiral lead screw 14 are both fixed to the connecting plate 10. The two cylinder fixing blocks 15 pass through the double-sided spiral lead screw 14 and are symmetrically fixed to it. The other ends of the two cylinder fixing blocks 15 are connected to the two cylinders 16, and the other ends of the two cylinders 16 are connected to the two front folding blade connecting plates 17. The front folding blade connecting plates 17 are connected to the front folding blade connecting plates 19. Two front folding knife fixing plates 18 are symmetrically positioned and connected to two "L"-shaped folding knives in the front folding knife assembly 11. A second guide rail 20 passes through the interior of the two front folding knife fixing plates 18. A slider (not shown in the figure) is installed on the second guide rail 20. The slider connects to the front folding knife fixing plates 18, allowing the front folding knife fixing plates 18 to slide back and forth along the second guide rail 20. Two rear folding knife fixing plates 19 are symmetrically positioned and connected to two "L"-shaped folding knives in the rear folding knife assembly 12. A third guide rail 21 passes through the interior of the two rear folding knife fixing plates 19. A slider (not shown in the figure) is installed on the third guide rail 21. The slider connects to the rear folding knife fixing plates 19, allowing the two rear folding knife fixing plates 19 to slide back and forth along the third guide rail 21. Above the front folding blade fixing plate 18 and the rear folding blade fixing plate 19, which are aligned in the same direction, a guide rail 23 is also provided. A slider 25 is connected between the rear folding blade fixing plate 19 and the guide rail 23. One end of the guide rail 23 passes through the slider 25, and the other end is connected to the top of the rear folding blade fixing plate 19 and the bottom of the cylinder 16, thereby connecting the front folding blade assembly 11 and the rear folding blade assembly 12. This allows for the coordinated adjustment of the length and width of the front folding blade assembly 11 and the rear folding blade assembly 12.

[0032] When the lead screw motor 13 drives the bidirectional spiral screw 14 to rotate, the cylinder fixing block 15 has a thread inside, and the thread direction is opposite to the thread direction on the bidirectional spiral screw 14 connected to it. Under the engagement of the internal thread and the thread of the bidirectional spiral screw 14, the cylinder fixing block 15 achieves reverse synchronous movement, which in turn drives the two front folding knife connecting plates 17 and the two front folding knife fixing plates 18 to move in opposite synchronous movement along the guide rail 20. The front folding knife assembly 11 is connected to the front folding knife fixing plate 18 and will move in opposite synchronous movement with the front folding knife fixing plate 18. The front folding knife fixing plate 18 and the rear folding knife fixing plate 19 are connected by the guide rail 23. The rear folding knife fixing plate 19 is connected to the rear folding knife assembly 12, which drives the rear folding knife assembly 12 to move in opposite synchronous movement with the front folding knife assembly 11.

[0033] In this invention, the distance between the front folding blade assembly 11 and the rear folding blade assembly 12 (i.e., the width of the entire folding blade assembly) is adjusted by the following structure. It also includes a motor 26, a drive screw 27, a fixed base 29, two guide rail connecting plates 30, two guide rails 22, and two sliders 24. The two sliders 24 are located on both sides of the motor 26. The two guide rails 22 are parallel and pass through the sliders 24. Two guide rail connecting plates 30 are vertically fixed to the bottom of the two guide rails 22. The two guide rail connecting plates 30 are respectively fixed to guide rails 20 and 21. A fixed base 29 is vertically provided on the guide rail connecting plate 30 connected to guide rail 20. One end of the drive screw 27 is connected to the motor 26, and the other end passes through the fixed base 29 and is fixed.

[0034] In actual operation, the motor 26 drives the drive screw 27 to rotate in the forward or reverse direction, thereby adjusting the position of the fixed seat 29 on the drive screw 27. The position of the rear folding blade assembly 12 remains unchanged, while the fixed seat 29 is set on the front folding blade fixing plate 18 connected to the front folding blade assembly 11. The fixed seat 29 moves back and forth along the drive screw 27, which in turn drives the rear folding blade assembly 12 to move back and forth along the drive screw 27, thereby realizing the distance adjustment between the two folding blade assemblies.

[0035] To facilitate better adjustment of the entire mechanism on the bag-opening machine, this invention also includes three grooves 31 along its length on the support base 1. The support base 1 is connected to the bag-opening machine by nuts, and the position of the nuts within the grooves 31 is adjustable. Furthermore, this invention also includes two transverse grooves 32 at the connection point between the rotating seat 3 and the rear side plate 4. The rotating seat is connected to the rear side plate 4 by nuts, and the position of the nuts within the grooves 32 is adjustable. These grooves allow the entire mechanism to flexibly adapt to different bag-opening machine equipment.

[0036] In actual use, depending on the specific installation location and working requirements of the bag opener, the folding knife mechanism is fixed in a suitable position on the bag opener by adjusting the positions of the nuts in groove 31 on the support base 1 and groove 32 on the rotating seat 3. Then, according to actual operational needs, the angle of the rear side plate 4 is adjusted by adjusting the connection angle between the rotating seat 3 and the support base 1 to bring the entire mechanism into the optimal working posture.

[0037] When it is necessary to open bags of different sizes, the lead screw motor 13 is started according to the length of the bag opening. The lead screw motor 13 drives the bidirectional spiral lead screw 14 to rotate, causing the two cylinder fixing blocks 15 to slide synchronously in opposite directions along the connecting seat 3. This, in turn, drives the two front folding knife connecting plates 17 and the two front folding knife fixing plates 18 connected to them to slide synchronously in opposite directions along the guide rail 20. Finally, it drives the two "L"-shaped folding knives in the front folding knife group to move synchronously in opposite directions in the lateral direction. The front folding knife fixing plate 18 and the rear folding knife fixing plate 19 are connected by the guide rail. The two "L"-shaped folding knives in the rear folding knife group will also move synchronously in opposite directions in the lateral direction. This completes the extension or shortening of the front folding knife group 11 and the rear folding knife group 12 to adapt to the length requirements of the bag opening.

[0038] According to the width of the pocket, adjust the longitudinal distance between the front folding knife assembly 11 and the rear folding knife assembly 12. First, the motor 26 drives the drive screw 27 to rotate in the forward or reverse direction, the fixed seat 29 moves on the drive screw 27, the position of the rear folding knife assembly 12 remains unchanged, and the rear folding knife fixing plate 19 moves along the drive screw 27 along with the fixed seat 29. This completes the adjustment of the distance between the front folding knife assembly 11 and the rear folding knife assembly 12 to adapt to the width requirements of the pocket opening.

[0039] After adjusting the lengths of the front folding knife group 11 and the rear folding knife group 12, as well as the width of the folding knife assembly and the overall position of the folding knife mechanism on the bag opening machine according to the bag opening size, the laser positioning device 28 is activated. The laser positioning device 28 emits a laser beam, forming a clear positioning mark on the operating table. The operator accurately places the zipper and bag flap according to the laser positioning mark. After the bag opening process is completed, the bag opening machine moves the fabric under the folding knife mechanism and presses it on the placed zipper and bag flap. Cylinder 5 drives the lifting base plate 8, the adjusting component, and the folding knife assembly to move up and down according to the required bag opening height. The front folding knife group 11 and the rear folding knife group 12 work together to fold the fabric. At the same time, the lifting cylinder 16 can also drive the front folding knife fixing plate 17, the front folding knife connecting plate 18, the rear folding knife fixing plate 19, and the folding knife assembly to move up and down according to the required bag opening height. After the folding operation is completed, the bag opening machine moves the zipper, bag flap, and fabric together to the sewing module for sewing.

Claims

1. A folding knife mechanism for an automatically positioning bag opening machine, comprising a support base, a lifting assembly, an adjusting assembly, and a folding knife assembly, characterized in that: A lifting assembly is fixedly installed at the front end of the support base, and an adjustment assembly is fixedly installed at the front end of the lifting assembly. A folding blade assembly is fixedly installed at the lower end of the adjustment assembly. The folding blade assembly includes a front folding blade group and a rear folding blade group, which are arranged parallel to each other with a gap. The lifting assembly drives the adjustment assembly and the folding blade assembly to move up and down. The adjustment assembly allows the front folding blade group and the rear folding blade group to be adjusted in length in the horizontal direction and in distance between them in the vertical direction. It also includes two laser positioning devices located on both sides of the adjustment assembly and directly above the sides of the front folding blade group and the rear folding blade group.

2. The folding knife mechanism for an automatically positioned bag opening machine according to claim 1, characterized in that: The support base includes a support base, a fixed rod, a rotating seat, and a rear side plate. The fixed rod is fixedly installed at the front end of the support base, and the rotating seat is sleeved on the fixed rod. The rotating seat is T-shaped and is vertically fixedly connected to the rear side plate.

3. The folding knife mechanism for an automatically positioned bag opening machine according to claim 2, characterized in that: The lifting assembly includes a lifting cylinder, a guide rail, a lifting base plate, and a cylinder seat. The lifting cylinder is fixedly installed on the cylinder seat, which is fixed to the top of the rear side plate. The rear side plate is vertically arranged and has a slider installed on it. The lifting base plate is fixed on the slider, and a connecting plate is fixed to the bottom of the lifting base plate. The connecting plate is connected to the adjustment assembly.

4. The folding knife mechanism for an automatically positioned bag opening machine according to claim 3, characterized in that: The front folding blade assembly and the rear folding blade assembly are each composed of two folding blades that are partially attached and arranged in parallel on a horizontal line.

5. The folding knife mechanism for an automatically positioned bag opening machine according to claim 4, characterized in that: The adjustment assembly consists of a lead screw motor, a double-threaded lead screw, two cylinder fixing blocks, two lifting cylinders, two front folding blade connecting plates, two front folding blade fixing plates, and two rear folding blade fixing plates. A laser positioning device is fixed to a connecting rod on the outside of the front folding blade connecting plate. The lead screw motor and the double-threaded lead screw are both fixed to the connecting plate. The two cylinder fixing blocks are symmetrically fixed to the double-threaded lead screw, allowing the cylinder fixing blocks to slide synchronously in opposite directions along the connecting seat. The other end of each cylinder fixing block is connected to a lifting cylinder, and the other end of the lifting cylinder is connected to the front folding blade connecting plate. The front folding blade connecting plate is connected to the front folding blade fixing plate. The two front folding blade fixing plates are symmetrically positioned on both sides of the front folding blade assembly. Guide rails are installed inside each of the two front folding blade fixing plates, allowing the two front folding blade fixing plates to slide along guide rails. The two rear folding blade fixing plates are symmetrically positioned on both sides of the rear folding blade assembly. Guide rails are installed inside each of the two rear folding blade fixing blocks, allowing the two rear folding blade fixing blocks to slide along guide rails.

6. The folding knife mechanism for an automatically positioned bag opening machine according to claim 5, characterized in that: A guide rail five connects the front folding blade fixing plate and the rear folding blade fixing plate, which are in the same direction. A slider three is also provided and placed on the rear folding blade fixing plate. The guide rail five can slide along the slider three, thereby realizing the connection between the front folding blade assembly and the rear folding blade assembly.

7. The folding knife mechanism for an automatically positioned bag opening machine according to claim 5, characterized in that: It also includes a motor, a drive screw, a fixed base, two guide rail connecting plates, two guide rails (four), and two sliders (two). The two sliders (two) are located on both sides of the motor. The two guide rails (four) are parallel and pass through the two sliders (two). Two guide rail connecting plates are set at the bottom of the two guide rails (four). The two guide rail connecting plates are fixed on the guide rails (two) and (three) respectively. The guide rail connecting plates connected to the guide rails (two) are vertically provided with fixed bases. One end of the drive screw is connected to the motor, and the other end passes through the fixed base and is fixed.

8. The folding knife mechanism for an automatically positioned bag opening machine according to claim 2, characterized in that: The bracket base has several grooves, and the bracket base is connected to the standby device by nuts. The position of the nuts in the grooves is adjustable.

9. The folding knife mechanism for an automatically positioned bag opening machine according to claim 2, characterized in that: Several grooves are provided at the connection between the rotating seat and the rear side plate. The rotating seat is connected to the rear side plate through a nut, and the position of the nut in the groove is adjustable.

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