Material folding device and bag opening machine

Abstract

The invention discloses a material folding device and a bag opening machine, and relates to the technical field of bag opening machines. The first material folding units are arranged on the support in a sliding mode, the multiple first material folding units are arranged in parallel in the first direction, and first material folding flanges are arranged on the first material folding units in a protruding mode; the second material folding units are arranged opposite to the first material folding units, are arranged on the support in a sliding mode and are arranged in parallel in the first direction; the second material folding unit is convexly provided with a second material folding flange, and the first material folding flange and the second material folding flange are oppositely arranged along a second direction perpendicular to the first direction; the first driving assembly is used for driving the first material folding units and the second material folding units to move in the first direction so as to adjust the gap between the first material folding units and the gap between the second material folding units. And the second driving assembly is used for driving the first material folding unit and the second material folding unit to move towards each other or away from each other in the second direction. The bag opening material folding device can meet the material folding requirements of bag openings of different sizes, and the material folding device does not need to be replaced.

Description

Technical Field

[0001] This invention relates to the technical field of bag opening machines, and particularly to a folding device and a bag opening machine. Background Technology

[0002] A pocket opening machine is a mechanical device used for processing pockets in clothing. The folding device is an important component of the pocket opening machine. When processing pockets, the pocket opening machine cuts the pocket opening into the fabric using a cutting mechanism. The folding device is inserted into the pocket opening to fold the cut opening inward. Then, the pocket fabric is placed below the pocket opening, and the sewing mechanism sews the pocket fabric to the pocket opening.

[0003] Chinese invention patent CN117188053A discloses a folding mechanism for a garment bag opening machine, including a bracket, a sliding seat, a driving component, and folding blades. The folding blades include a first folding blade, a second folding blade, a third folding blade, and a fourth folding blade that can be closed to form a rectangular outer contour. The driving component can drive the first folding blade and the second folding blade to move outward synchronously, or drive the third folding blade and the fourth folding blade to move outward synchronously, thereby realizing the folding operation.

[0004] In the above technical solution, the folding mechanism can only fold the bag opening of a specific size. When the required bag opening size changes, the folding mechanism of the corresponding size must be replaced. It is troublesome to disassemble and replace the folding mechanism on the bag opening machine, and multiple sizes of folding mechanisms need to be equipped for replacement, which increases the equipment cost. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a folding device and a bag opening machine that can adapt to the folding requirements of bag openings of different sizes, reduce the cumbersome operation of changing the folding mechanism, and reduce the cost of the bag opening machine.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0007] According to a first aspect of the present invention, a bending device is provided, the bending device comprising:

[0008] support;

[0009] The first folding unit is slidably disposed on the bracket. Multiple first folding units are arranged in parallel along a first direction. The first folding unit is provided with a first folding flange.

[0010] The second folding unit is disposed opposite to the first folding unit and is slidably disposed on the bracket. Multiple second folding units are arranged parallel to each other along a first direction. The second folding unit is provided with a second folding flange. The first folding flange and the second folding flange are disposed opposite to each other along a second direction. The first direction is perpendicular to the second direction.

[0011] A first driving component is connected to the first folding unit and the second folding unit, and is used to drive the first folding unit and the second folding unit to move along the first direction to adjust the gap between the first folding unit and the gap between the second folding unit;

[0012] The second driving component is connected to the first folding unit and the second folding unit, and is used to drive the first folding unit and the second folding unit to move towards or away from each other along the second direction.

[0013] Furthermore, the bracket includes a support base, a first folding base, and a second folding base. The first folding base and the second folding base are slidably disposed on the support base along the second direction. The first folding unit is slidably connected to the first folding base along the first direction, and the second folding unit is slidably connected to the second folding base along the first direction. The second driving assembly is connected to the first folding base and the second folding base and is used to drive the first folding base and the second folding base to slide towards or away from each other along the second direction.

[0014] Furthermore, the first driving assembly includes a power component, a driving component, and a plurality of driving rods. The driving component has a plurality of elongated driving slots, which are arranged along the first direction. The driving slots are inclined relative to the first direction, and the inclination angle of the plurality of driving slots relative to the first direction gradually increases or decreases along the first direction. The plurality of driving rods are inserted into the plurality of driving slots one by one. The power component is connected to the driving component and is used to drive the driving component to move relative to the driving rods, so that the driving rods slide relative to the inner wall of the driving slots along the length direction of the driving slots.

[0015] The plurality of drive rods are fixedly connected to the first folding unit in a one-to-one correspondence, and the power component is disposed on the first folding seat; and / or, the plurality of drive rods are fixedly connected to the second folding unit in a one-to-one correspondence, and the power component is disposed on the second folding seat.

[0016] Furthermore, the driving component includes a driving plate, and the power component is connected to the driving plate and can drive the driving plate to move perpendicular to the first direction; a plurality of driving slots are formed on the driving plate, and the driving slots are elongated slots parallel to the driving plate.

[0017] Furthermore, the driving groove is a long straight groove, and the driving groove satisfies: (1 / k1-1 / k2=M), where k1 and k2 are the slopes of the angles between any two adjacent driving grooves and the first direction, and k1<k2, and M is a constant.

[0018] Furthermore, the power component includes a first drive motor, a first gear, and a first rack. The first rack is fixedly connected to the drive plate and is arranged perpendicular to the first direction. The first gear meshes with the first rack and is coaxially fixed to the shaft of the first drive motor.

[0019] Furthermore, the first folding seat is provided with a guide post, the guide post extends along the first direction, and the first folding unit is provided with a guide hole that slides and engages with the guide post;

[0020] And / or, the second folding seat is provided with a guide post, the guide post extending along the first direction, and the second folding unit is provided with a guide hole that slides and engages with the guide post.

[0021] Furthermore, the first folding unit and the second folding unit are arranged in a one-to-one correspondence. The first folding unit is provided with a first insertion hole on the side facing the second folding unit, and the second folding unit is provided with a second insertion hole on the side facing the first folding unit. A synchronous shaft is inserted into both the first insertion hole and the second insertion hole. The synchronous shaft extends along the second direction and can slide along the axial direction of the first insertion hole and the second insertion hole.

[0022] Furthermore, the folding device also includes end folding units, of which two are provided. A plurality of first folding units and a plurality of second folding units are disposed between the two end folding units. Each of the two end folding units has a protruding end folding flange, and the two end folding flanges are disposed opposite to each other along the first direction. Among the plurality of arranged first folding units, the two first folding units at both ends are respectively fixedly connected to one end folding unit. And / or, among the plurality of arranged second folding units, the second folding units at both ends are respectively fixedly connected to one end folding unit.

[0023] Furthermore, the second drive assembly includes a second drive motor, a second gear, a second rack, and a third rack. The second drive motor is fixedly mounted on the support base. The second gear is coaxially connected to the rotating shaft of the second drive motor. The second rack is fixedly mounted on the first bending seat. The third rack is fixedly mounted on the second bending seat. The second rack and the third rack are parallel to the second direction and spaced apart. The second gear is disposed between the second rack and the third rack and meshes with both the second rack and the third rack.

[0024] According to a second aspect of the present invention, a bag opening machine is provided, the bag opening machine comprising a frame, a frame pressing mechanism, a cutting mechanism, a sewing mechanism, and a folding device as described above, wherein the frame pressing mechanism, the cutting mechanism, the sewing mechanism, and the folding device are disposed on the frame.

[0025] In summary, the present invention has the following beneficial effects:

[0026] 1. In this invention, the folding device includes a plurality of first folding units and a plurality of second folding units arranged opposite each other. The plurality of first folding units and the plurality of second folding units are all arranged along a first direction, forming a rectangle for insertion into the bag opening. When the second driving component drives the first folding units and the second folding units to move in opposite directions, the plurality of first folding flanges and the plurality of second folding flanges arranged in opposite directions fold the fabric from below the bag opening, thus achieving folding. After folding is completed, the second driving component drives the first folding units and the second folding units to move towards each other, allowing the folding device to exit the bag opening.

[0027] When the required bag opening size changes, the first drive assembly can drive the first and second folding units to move along a first direction to adjust the gaps between the multiple first folding units and the multiple second folding units, thereby changing the length of the arrangement of the multiple first and multiple second folding units to adapt to different bag opening lengths. The second drive assembly can drive the first and second folding units to move in opposite directions along a second direction to adjust the gaps between the first and second folding units to adapt to different bag opening widths. Therefore, the folding device of this solution is applicable to processing bag openings of various sizes, eliminating the need for multiple sets of folding devices of different sizes for replacement, reducing the cumbersome operation of changing folding devices, and lowering equipment costs.

[0028] 2. The bracket includes a support base, a first folding base, and a second folding base. The second drive assembly can drive the first folding base and the second folding base to move towards or away from each other, thereby synchronously driving multiple first folding units and multiple second folding units to move towards or away from each other. Thus, multiple first folding units and multiple second folding units can be driven to move by one second drive assembly, reducing the cost of the second drive assembly, while ensuring that multiple first folding units and multiple second folding units move synchronously, thus ensuring the quality of the folding process.

[0029] 3. The drive rod is fixedly connected to the first folding unit and / or the second folding unit. The first folding unit and / or the second folding unit limit the drive rod in the second direction, preventing the drive rod from moving in the second direction and allowing it to move only in the first direction. The first drive assembly drives the drive component to move relative to the drive rod through a power component. The drive groove on the drive component moves relative to the drive rod, and the drive rod slides along the length of the drive groove. The drive groove is inclined relative to the first direction, so that when the drive groove moves relative to the drive rod, the inner wall of the drive groove presses the drive rod to move in the first direction, thereby driving the first folding unit and / or the second folding unit to move in the first direction. The inclination angle of the multiple drive grooves arranged along the first direction relative to the first direction gradually increases. The distances that the multiple drive rods move along the first direction can be gradually reduced, thereby adjusting the gaps between the multiple first folding units and / or the multiple second folding units. At the same time, since the included angle between the two drive grooves at both ends is the largest among the multiple arranged drive grooves, and the included angle between the two drive grooves that are closer together is smaller, this means that among the multiple drive rods, with any drive rod as a reference, the drive rod that is farther away from that drive rod has a larger displacement relative to that reference drive rod along the first direction. As a result, the multiple first folding units and / or the multiple second folding units are less likely to interfere with each other when moving along the first direction, and the multiple first folding units and / or the multiple second folding units are more evenly distributed, which is beneficial for the folding device to perform folding operations.

[0030] 4. The driving component includes a driving plate, a driving groove is a long groove set on the driving plate, and a power component is a linear driving mechanism that drives the driving plate to move perpendicular to the first direction, so that the driving rod slides relative to the driving groove along the length direction of the driving groove. This type of driving component is simple to process, has low cost, and the sliding of the driving rod relative to the driving groove is relatively smooth, with low wear between the driving rod and the driving groove.

[0031] 5. The drive slot is a long straight slot. As the tilt angle of the multiple drive slots arranged along the first direction gradually increases or decreases relative to the first direction, the slope of the angle between the multiple drive slots and the first direction is different. For any two adjacent drive slots, one is defined as the first drive slot with an angle of slope k1 with the first direction, and the other is defined as the second drive slot with an angle of slope k2 with the first direction, where k1 < k2. When the drive plate moves a distance L perpendicular to the first direction, the distance S1 = L / k1 moves the drive rod in the first drive slot along the first direction, and the distance S2 = L / k2 moves the drive rod in the second drive slot along the first direction. S1 - S2 = L(1 / k1 - 1 / k2), which is (1 / k1 - 1 / k2) = (S1 - S2) / L. When the drive slot satisfies 1 / k1 - 1 / k2 = M, where M is a constant, S1 - S2 = ML. It can be seen that the spacing between any two adjacent drive rods is the same, so that multiple first folding units and / or multiple second folding units are evenly distributed along the first direction, ensuring the folding effect. Meanwhile, the distance between the drive rods in any two adjacent drive slots is linearly related to the distance the drive plate moves along the first direction, which makes it easy to accurately control the stroke of the first folding unit and / or multiple second folding units along the first direction by controlling the displacement of the drive plate.

[0032] 6. The power components include a first drive motor, a first gear, and a first rack. The first drive motor drives the first gear to rotate, which in turn drives the first rack to move perpendicular to the first direction, thereby causing the drive plate to move linearly perpendicular to the first direction.

[0033] 7. The first folding unit cooperates with the guide post through the guide hole to connect the first folding unit and the first folding seat. The first folding unit cannot move perpendicular to the first direction, but can only slide along the first direction. And / or, the second folding unit cooperates with the guide post through the guide hole to connect the second folding unit and the second folding seat. The second folding unit cannot move perpendicular to the first direction, but can only slide along the first direction.

[0034] 8. A synchronous shaft is provided between the first folding unit and the second folding unit. The synchronous shaft extends along the second direction and inserts into the first and second insertion holes to connect the first and second folding units in the first direction. This prevents the first and second folding units from moving relative to each other in the first direction. Therefore, the first drive assembly only needs to be connected to one of the first and second folding units to drive their movement, simplifying the setup of the first drive assembly. This setup also ensures the synchronicity of the movement of the first and second folding units, guaranteeing folding quality. The synchronous shaft can slide axially along the first and second insertion holes, ensuring that the second drive assembly can drive the first and second folding units to move towards or away from each other.

[0035] 9. The folding device has two end folding units, which are located at both ends of the first and second folding units arranged in an array, and are fixedly connected to the end folding units. When processing pockets that require folding in the width direction of the bag opening, the first folding unit, the second folding unit, and the end folding units are inserted into the bag opening. The first drive assembly can drive multiple first folding units and / or multiple second folding units to move, causing the two end folding units to move in opposite directions to fold the fabric in the width direction of the bag opening through the end folding flange. Thus, the folding device of this solution makes full use of the first drive assembly without the need for additional end folding drive components. Attached Figure Description

[0036] Figure 1 This is a three-dimensional structural diagram of a material folding device according to an embodiment of the present invention.

[0037] Figure 2 This is a three-dimensional structural diagram of a first folding unit, a second folding unit, a first driving component, and a bracket according to an embodiment of the present invention.

[0038] Figure 3 This is an exploded structural diagram of a material folding device according to an embodiment of the present invention.

[0039] Figure 4 This is a schematic diagram of the structure of the first folding seat, the second folding seat, the first folding unit, and the second folding unit according to an embodiment of the present invention.

[0040] Figure 5 This is a three-dimensional structural diagram of the first folding unit and the first driving assembly according to an embodiment of the present invention. Figure 1 .

[0041] Figure 6 This is a schematic diagram of a folding plate structure according to an embodiment of the present invention.

[0042] Figure 7 This is a three-dimensional structural diagram of the first folding unit and the first driving assembly according to an embodiment of the present invention. Figure 2 .

[0043] Figure 8 This is a vertical cross-sectional structural diagram of the first folding unit and the second folding unit according to an embodiment of the present invention.

[0044] Figure 9 This is a schematic diagram of the structure of a drive shaft according to an embodiment of the present invention.

[0045] Figure 10 This is a schematic diagram of the scissor-type telescopic chain and the first folding unit according to an embodiment of the present invention.

[0046] In the picture:

[0047] 1000, Folding device; 100, bracket; 110, support base; 120, first folding base; 130, second folding base; 140, guide post; 200, first folding unit; 201, first folding flange; 202, first insertion hole; 210, first connecting part; 220, first folding piece; 300, second folding unit; 301, second folding flange; 302, second insertion hole; 310, second connecting part; 320, second folding piece; 400, first drive assembly; 410, power component; 411, first drive motor; 412, first gear; 413, the... 420. Rack; 430. Drive plate; 440. Drive rod; 441. Drive slot; 442. Drive slot; 450. Drive shaft; 470. Scissor telescopic chain; 471. Scissor telescopic unit; 472. First connecting rod; 473. Second connecting rod; 500. Second drive assembly; 510. Second drive motor; 520. Second gear; 530. Second rack; 540. Third rack; 600. First fixed folding unit; 700. Second fixed folding unit; 800. Synchronous shaft; 900. End folding unit; 910. End folding flange. Detailed Implementation

[0048] The invention will now be further described with reference to the accompanying drawings.

[0049] This paper establishes an orthogonal coordinate system XYZ, where the positive direction of the X-axis represents left, the negative direction of the X-axis represents right, the positive direction of the Y-axis represents front, the negative direction of the Y-axis represents back, the positive direction of the Z-axis represents top, and the negative direction of the Z-axis represents bottom. It should be noted that the terms "left," "right," "front," "back," "top," and "bottom" are merely relative positions used for ease of description and are not intended to limit the technical solution of this embodiment.

[0050] Example 1

[0051] This embodiment discloses a material bending device 1000, referring to... Figure 1 The folding device 1000 includes a support 100 and a first folding unit 200, a second folding unit 300, a first drive assembly 400, and a second drive assembly 500 disposed on the support 100. The first folding unit 200 and the second folding unit 300 are used to insert into the bag opening to perform folding operations.

[0052] Reference Figure 1 and Figure 2Multiple first folding units 200 and multiple second folding units 300 are provided, and both the multiple first folding units 200 and the multiple second folding units 300 can be slidably disposed on the support 100. The multiple first folding units 200 are arranged in parallel along a first direction, and the multiple second folding units 300 are arranged in parallel along the first direction. The second folding units 300 are disposed opposite to the first folding units 200, so that the multiple first folding units 200 and the multiple second folding units 300 form a rectangle for insertion into the bag opening for folding operations.

[0053] Each first folding unit 200 has a first folding flange 201 protruding, and each second folding unit 300 has a second folding flange 301 protruding. The first folding flange 201 and the second folding flange 301 are arranged opposite to each other along a second direction. The first folding flange 201 and the second folding flange 301 are used to fold the fabric in the length direction of the bag opening.

[0054] In this embodiment, the first direction and the second direction are two mutually perpendicular directions. Specifically, the first direction is the left-right direction, and the second direction is the front-back direction. Multiple first folding units 200 are arranged along the left-right direction, and multiple second folding units 300 are arranged along the left-right direction, with the first folding units 200 positioned opposite to the second folding units 300 behind them.

[0055] The first driving assembly 400 and the second driving assembly 500 are used to drive the movement of multiple first folding units 200 and second folding units 300 to adjust the size enclosed by the first folding units 200 and the second folding units 300, so as to meet the folding processing requirements of bag openings of different sizes.

[0056] Specifically, the first driving assembly 400 is connected to the first folding unit 200 and the second folding unit 300, and is used to drive the first folding unit 200 and the second folding unit 300 to move along a first direction, so as to adjust the gap between the plurality of first folding units 200 and the gap between the plurality of second folding units 300. The second driving assembly 500 is connected to the first folding unit 200 and the second folding unit 300, and is used to drive the first folding unit 200 and the second folding unit 300 to move towards or away from each other along a second direction.

[0057] During the folding operation at the bag opening, the folding device 1000 moves downward relative to the bag opening, and multiple first folding units 200 and second folding units 300 are inserted into the bag opening. The second drive assembly 500 drives the first folding units 200 and second folding units 300 to move in opposite directions, causing multiple first folding flanges 201 and multiple second folding flanges 301 arranged in opposite directions to fold the fabric along the length of the bag opening from below, thus achieving folding. After folding is completed, the second drive assembly 500 drives the first folding units 200 and second folding units 300 to move towards each other, so that the folding device 1000 can exit the bag opening.

[0058] When the required bag opening size changes, the first driving assembly 400 can drive the first folding unit 200 and the second folding unit 300 to move along a first direction, adjusting the gaps between the multiple first folding units 200 and the multiple second folding units 300. This changes the length of the arrangement of the multiple first folding units 200 and the multiple second folding units 300, and the length of the rectangle formed by the first folding units 200 and the second folding units 300, adapting to the folding requirements of bag openings of different lengths. The second driving assembly 500 can drive the first folding unit 200 and the second folding unit 300 to move towards or away from each other along a second direction, adjusting the gaps between the first folding units 200 and the second folding unit 300. This changes the width of the rectangle formed by the first folding units 200 and the second folding units 300, adapting to the folding requirements of bag openings of different widths. Therefore, the folding device 1000 in this solution can be used for processing bag openings of various sizes, eliminating the need to set up multiple sets of folding devices 1000 of different sizes for replacement, reducing the cumbersome operation of replacing folding devices 1000, and lowering the equipment cost of folding devices 1000.

[0059] Reference Figures 1 to 3 In this embodiment, the bracket 100 includes a support base 110, a first folding base 120, and a second folding base 130. The first folding base 120 and the second folding base 130 are disposed below the support base 110, both extending parallel to a first direction, and the first folding base 120 and the second folding base 130 are disposed opposite each other. The first folding base 120 and the second folding base 130 are slidably disposed on the support base 110 along a second direction. A second driving assembly 500 is connected to the first folding base 120 and the second folding base 130, and is used to drive the first folding base 120 and the second folding base 130 to slide towards or away from each other along the second direction.

[0060] Specifically, in this embodiment, a slide rail extending in the second direction is provided on the lower side of the support base 110, and sliders that slide and cooperate with the slide rail are connected to the upper side of the first folding base 120 and the upper side of the second folding base 130, so as to realize the sliding connection between the first folding base 120 and the second folding base 130 and the support base 110.

[0061] Reference Figures 1 to 4 In this embodiment, the first folding unit 200 is slidably connected to the first folding seat 120 along the first direction, and the second folding unit 300 is slidably connected to the second folding seat 130 along the first direction. That is, in this embodiment, the second driving component 500 is connected to the first folding unit 200 through the first folding seat 120, and to the second folding unit 300 through the second folding seat 130.

[0062] When the second drive assembly 500 drives the first folding seat 120 and the second folding seat 130 to move towards or away from each other, it can synchronously drive multiple first folding units 200 and multiple second folding units 300 to move towards or away from each other. Thus, multiple first folding units 200 and multiple second folding units 300 can be driven by a single second drive assembly 500, reducing the cost of the second drive assembly 500 while ensuring synchronous movement of the multiple first folding units 200 and multiple second folding units 300, thereby guaranteeing the quality of the folding process.

[0063] In addition, in other embodiments, the first folding seat 120 and the second folding seat 130 may not be provided. Instead, the first folding unit 200 and the second folding unit 300 may be slidably connected to the support seat 110. The second driving component 500 is directly connected to each of the first folding unit 200 and the second folding unit 300 and directly drives the first folding unit 200 and the second folding unit 300 to move along the second direction.

[0064] Reference Figure 3 In this embodiment, the second drive assembly 500 includes a second drive motor 510, a second gear 520, a second rack 530, and a third rack 540. The second drive motor 510 is fixedly mounted on the support base 110. The second gear 520 is coaxially connected to the rotating shaft of the second drive motor 510. The second rack 530 is fixedly mounted on the first bending seat 120, and the third rack 540 is fixedly mounted on the second bending seat 130. The second rack 530 and the third rack 540 are parallel to a second direction and spaced apart. The second gear 520 is disposed between the second rack 530 and the third rack 540 and meshes with both racks simultaneously.

[0065] When the second drive motor 510 rotates, it drives the second gear 520 to rotate. The second gear 520 drives the second rack 530 and the third rack 540 to move in opposite directions along the second direction, so as to drive the first folding seat 120 and the second folding seat 130 to move in opposite directions along the second direction.

[0066] In addition, in other embodiments, the second drive assembly 500 may also employ other suitable linear drive mechanisms. For example, the second drive assembly 500 may include one, two, or more of the following: a single- or double-headed cylinder, a single- or double-headed hydraulic cylinder, or a single- or double-headed motor screw mechanism. The second drive assembly 500 is connected between the first folding seat 120 and the second folding seat 130 to drive the first folding seat 120 and the second folding seat 130 to move toward or away from each other.

[0067] Reference Figure 2 and Figure 3 In this embodiment, the first driving assembly 400 includes a power component 410, a driving component, and a plurality of driving rods 430. The power component 410 is connected to the driving component, the driving component is connected to the driving rods 430, and the plurality of driving rods 430 are fixedly connected to a plurality of first folding units 200 in a one-to-one correspondence. The power component 410 drives the driving component to move relative to the driving rods 430, thereby driving the plurality of driving rods 430 to drive the plurality of first folding units 200 to move along a first direction.

[0068] Reference Figure 5 In this embodiment, the driving component includes a driving plate 420 and a power component 410, which is a linear drive mechanism capable of driving the driving plate 420 to move perpendicular to a first direction. The driving plate 420 has multiple elongated driving slots 440, which are elongated slots parallel to the surface of the driving plate 420. The multiple driving slots 440 are arranged along the first direction on the driving plate 420, and multiple driving rods 430 are correspondingly inserted into the multiple driving slots 440. This type of driving component is simple to manufacture, has low cost, and the sliding of the driving rods 430 relative to the driving slots 440 is relatively smooth, resulting in low wear between the driving rods 430 and the driving slots 440.

[0069] Reference Figure 5 and Figure 6The drive groove 440 is inclined relative to the first direction. When the drive plate 420 moves perpendicular to the first direction, the drive groove 440 moves relative to the drive rod 430, that is, the drive rod 430 slides along the length direction of the drive groove 440. When the drive groove 440 moves relative to the drive rod 430, the inner wall of the drive groove 440 abuts against the drive rod 430. The first folding unit 200 limits the drive rod 430 in the second direction, so that the drive rod 430 cannot move in the second direction, but can only move in the first direction, and thus the drive rod 430 drives the first folding unit 200 to move in the first direction. Therefore, when the power member 410 drives the drive plate 420 to move, it drives multiple drive rods 430 to move in the first direction through multiple drive grooves 440, thereby driving multiple first folding units 200 to move in the first direction.

[0070] In this design, the tilt angle of the drive groove 440 relative to the first direction gradually increases or decreases, causing the multiple drive rods 430 to move different distances along the first direction when the drive plate 420 moves. This results in changes in the spacing between the multiple drive rods 430 and the multiple first folding units 200, thereby allowing adjustment of the gap between the multiple first folding units 200. Simultaneously, among the multiple arranged drive grooves 440, the angle between the two drive grooves at the two ends is the largest, while the angle between the two drive grooves closer together is smaller. This means that, with any drive rod 430 as a reference, the further away a drive rod 430 is from that drive rod 430, the greater its displacement relative to that drive rod 430 along the first direction. Consequently, the multiple first folding units 200 are less likely to interfere with each other when moving along the first direction, and the multiple first folding units 200 are more evenly distributed, which is beneficial for the folding device 1000 to perform folding operations.

[0071] Specifically, refer to Figure 5 and Figure 6 In this embodiment, the tilt angle of the multiple drive slots 440 relative to the first direction gradually increases along the direction from right to left (conversely, the tilt angle of the multiple drive slots 440 relative to the first direction gradually decreases along the direction from left to right).

[0072] In this embodiment, among the multiple arranged drive grooves 440, the angle between the right drive groove 440 and the first direction (specifically, the angle between the drive groove 440 and the right front of the first direction) is an acute angle, while the angle between the left drive groove 440 and the first direction is an obtuse angle. From right to left, the angle between the drive grooves 440 and the first direction gradually increases. This arrangement allows the multiple first folding units 200 to disperse towards both ends along the first direction or converge from both ends towards the middle along the first direction when the drive plate 420 moves, thus making it more precise and convenient to adjust the arrangement length of the multiple first folding units 200 to adapt to the folding requirements of bag openings of different lengths.

[0073] Preferably, among the multiple arranged drive slots 440, the drive slots 440 on the left and the drive slots 440 on the right are symmetrically arranged. This makes it possible for the drive plate 420 to move, so that among the multiple first folding units 200, the first folding unit 200 on the left and the first folding unit 200 on the right are symmetrically distributed at the midpoint of the line connecting the multiple first folding units 200. This eliminates the need to center the folder 1000 multiple times when folding bag openings of different sizes, making it convenient to fold bag openings of different sizes.

[0074] In addition, in other embodiments, the tilt angle of the plurality of drive slots 440 relative to the first direction can also be set in other forms, as long as the tilt angle of the plurality of drive slots 440 relative to the first direction gradually increases or decreases along the first direction.

[0075] In this embodiment, the drive plate 420 specifically moves along a second direction, that is, the drive plate 420 moves along a front-to-back direction. Specifically, the drive plate 420 is horizontally positioned, and the drive rods 430 extend vertically and are inserted into the drive slots 440. The rear ends of the multiple drive slots 440 converge towards each other, and the front ends of the multiple drive slots 440 disperse towards each other. When the drive plate 420 moves forward, the multiple drive rods 430 move relative to the drive slots 440 toward the rear end of the drive slots 440, causing the multiple drive rods 430 to converge towards each other, that is, the multiple first folding units 200 move closer together along a first direction. When the drive plate 420 moves backward, the multiple drive rods 430 move relative to the drive slots 440 toward the front end of the drive slots 440, causing the multiple drive rods 430 to disperse towards each other, that is, the multiple first folding units 200 disperse towards each other along a first direction.

[0076] In addition, in other embodiments, when the rear ends of the plurality of drive slots 440 are dispersed from each other and the front ends of the plurality of drive slots 440 are brought together, the drive plate 420 moves forward and the plurality of first folding units 200 disperse from each other along the first direction; the drive plate 420 moves backward and the plurality of first folding units 200 are brought together along the first direction.

[0077] In other embodiments, the surface of the drive plate 420 may also be vertically arranged parallel to the first direction, and the drive rod 430 extends horizontally along the second direction and is inserted into the drive groove 440. The power member 410 drives the drive plate 420 to move vertically (i.e., simultaneously perpendicular to the first and second directions), so that the drive groove 440 moves relative to the drive rod 430.

[0078] In other embodiments, the drive plate 420 may not move perpendicular to the first direction, that is, the direction of movement of the drive plate 420 has a certain angle with the first direction.

[0079] In this embodiment, the power component 410 is disposed on the first folding seat 120. When the second drive assembly 500 drives the first folding seat 120 and the second folding seat 130 to move towards or away from each other, the power component 410 moves together with the first folding seat 120. This prevents the drive plate 420 from moving relative to the first folding unit 200 on the first folding seat 120 when the first folding seat 120 and the second folding seat 130 move towards or away from each other, thus preventing the first folding unit 200 from moving along the first direction.

[0080] In other embodiments, the power component 410 may also be disposed on the second folding seat 130, and multiple drive rods 430 are fixedly connected to the second folding unit 300 in a corresponding manner. When the power component 410 drives the drive plate 420 to move, it drives the second folding unit 300 to move along the first direction. In other embodiments, two first drive components 400 may also be disposed, with the power component 410 of one first drive component 400 disposed on the first folding seat 120 and the drive rod 430 connected to the first folding unit 200; and the power component 410 of the other first drive component 400 disposed on the second folding seat 130 and the drive rod 430 connected to the second folding unit 300. Thus, the first folding unit 200 is driven to move along the first direction and the second folding unit 300 is driven to move along the second direction through the two first drive components 400.

[0081] In this embodiment, the drive groove 440 is a long straight groove, which makes the drive rod 430 more stable when sliding relative to the drive groove 440, and facilitates the design and control of the distance the drive rod 430 moves along the first direction. In other embodiments, the drive groove 440 may also be an arc-shaped groove. In other embodiments, each drive groove 440 may also include multiple segments with different inclination angles, which are connected end-to-end to form a long groove.

[0082] In this embodiment, the slope of the drive slot 440 satisfies: (1 / k1-1 / k2=M).

[0083] Where k1 and k2 are the slopes of the angles between any two adjacent drive slots 440 and the first direction, and k1 < k2, M is a constant.

[0084] In this embodiment, since the tilt angle of the multiple drive slots 440 arranged along the first direction is gradually increasing or decreasing relative to the first direction, the slope k of the angle between the multiple drive slots 440 and the first direction is different.

[0085] like Figure 6As shown, for any two adjacent drive slots 440, one is defined as the first drive slot 441, with a slope of k1 at the angle to the first direction; the other is defined as the second drive slot 442, with a slope of k2 at the angle to the first direction, and k1 < k2. When the drive plate 420 moves a distance L perpendicular to the first direction, the drive rod 430 in the first drive slot 441 moves a distance S1 = L / k1 along the first direction, and the drive rod 430 in the second drive slot 442 moves a distance S2 = L / k2 along the first direction. The difference in distance between the two drive rods 430 moving along the first direction is S1-S2=L(1 / k1-1 / k2), which is (1 / k1-1 / k2)=(S1-S2) / L. When the drive groove 440 satisfies (1 / k1-1 / k2)=M, where M is a constant, S1-S2=ML. It can be seen that the difference in distance between any two adjacent drive rods 430 moving along the first direction is the same, so that the multiple first folding units 200 are evenly distributed along the first direction, ensuring the folding effect. At the same time, the distance between the drive rods 430 in any two adjacent drive grooves 440 is linearly related to the distance the drive plate 420 moves along the first direction, which makes it easy to accurately control the stroke of the first folding unit 200 along the first direction by controlling the displacement of the drive plate 420.

[0086] The value of M can be set according to actual needs. Specifically, the maximum value of 1 / k is +∞, the minimum value of 1 / k is -∞, and the range of M is (0, +∞). To ensure smooth movement of the drive rod 430 in the drive groove 440, the angle between the drive groove 440 and the first direction should not be too large or too small. In this embodiment, the range of the angles between the multiple drive grooves 440 and the first direction is [30°, 150°]. In this embodiment, the range of M is (0, 2√3), and more preferably [1 / 3, 2]. In addition, in other embodiments, the value of M can also be other suitable values.

[0087] In this embodiment, among the multiple arranged drive slots 440, the right drive slot 440 forms an acute angle with the first direction, and the slope of the angle between the right drive slot 440 and the first direction is positive. The left drive slot 440 forms an obtuse angle with the first direction, and the slope of the left drive slot 440 with the first direction is negative.

[0088] Reference Figure 4 and Figure 5In this embodiment, a first fixed folding unit 600 is fixedly disposed on the first folding base 120. The first fixed folding unit 600 is disposed at the midpoint of the line connecting multiple first folding units 200. The multiple first folding units 200 are close together or dispersed with the first fixed folding unit 600 as a reference, so as to facilitate the positioning of the first folding units 200. Since the first fixed folding unit 600 does not need to move along the first direction, in this embodiment, the middle part of the drive plate 420 corresponding to the first fixed folding unit 600 is not provided with a drive groove 440, and the drive groove 440 on the left side and the drive groove 440 on the right side of the drive plate 420 are not adjacent.

[0089] In addition, in other embodiments, a first folding unit 200 can be used instead of the first fixed folding unit 600, and a driving groove 440 can also be provided in the middle of the driving plate 420, the driving groove 440 having an angle of 90° with the first direction.

[0090] In some embodiments, the second folding seat 130 is fixedly provided with a second fixed folding unit 700. The second fixed folding unit 700 is disposed at the midpoint of the line connecting multiple second folding units 300. The multiple second folding units 300 are close together or dispersed with the second fixed folding unit 700 as a reference, so as to facilitate the positioning of the second folding units 300.

[0091] Reference Figure 7 In this embodiment, the power component 410 includes a first drive motor 411, a first gear 412, and a first rack 413. The first drive motor 411 is fixedly mounted on the first bending seat 120. The first rack 413 is fixedly connected to the drive plate 420, and is parallel to the drive plate 420 and perpendicular to the first direction. The first gear 412 meshes with the first rack 413 and is coaxially fixed to the rotating shaft of the first drive motor 411. The first drive motor 411 drives the first gear 412 to rotate, causing the first rack 413 to move perpendicular to the first direction, thereby driving the drive plate 420 to move linearly perpendicular to the first direction.

[0092] In addition, in other embodiments, the power component 410 may also be a hydraulic cylinder, pneumatic cylinder, electric cylinder, motor screw mechanism or other suitable linear drive mechanism.

[0093] In this embodiment, the drive plate 420 is slidably connected to the first folding seat 120. Specifically, the first folding seat 120 is provided with a slide rail that extends parallel to the driving direction of the power member 410, and a slider that slides with the slide rail is connected to the upper side of the drive plate 420. In addition, in other embodiments, the drive plate 420 may not be connected to the first folding seat 120, but may be supported by the power member 410.

[0094] Reference Figure 2 , Figure 4 and Figure 5 In this embodiment, the first folding base 120 is fixedly provided with a guide post 140. The guide post 140 extends along a first direction, and the first folding unit 200 is provided with a guide hole that slides and engages with the guide post 140.

[0095] The first folding base 120 is provided with two guide posts 140 spaced parallel to each other, and the first folding unit 200 is provided with two guide holes that mate one-to-one with the two guide posts 140. The first folding unit 200 mates with the guide posts 140 through the guide holes, so that the first folding unit 200 and the first folding base 120 are slidably connected. The first folding unit 200 cannot move perpendicular to the first direction or rotate circumferentially, but can only slide along the first direction.

[0096] In addition, in other embodiments, a guide rail extending along a first direction may be provided on the first folding seat 120, and the first folding unit 200 may be connected to a slider that slides with the guide rail.

[0097] In this embodiment, the second folding base 130 is also fixedly provided with two parallel and spaced guide posts 140. The guide posts 140 extend along the first direction, and the second folding unit 300 is provided with guide holes that slide and engage with the guide posts 140. The second folding unit 300 engages with the guide posts 140 through the guide holes, thereby connecting the second folding unit 300 with the second folding base 130. The second folding unit 300 cannot move perpendicular to the first direction or rotate circumferentially, but can only slide along the first direction.

[0098] In addition, in other embodiments, a guide rail extending along the first direction may be provided on the second folding seat 130, and the second folding unit 300 may be connected to a slider that slides with the guide rail.

[0099] In other embodiments, guide posts 140 may be provided on only one of the first folding seat 120 and the second folding seat 130, while slide rails may be provided on the other; correspondingly, one of the first folding unit 200 and the second folding unit 300 is provided with a guide hole, and the other is connected to a slider.

[0100] Reference Figure 2 and Figure 4 In this embodiment, the first folding unit 200 and the second folding unit 300 are arranged in a one-to-one correspondence, with each first folding unit 200 corresponding to a second folding unit 300.

[0101] Combination Figure 8The first folding unit 200 has a first insertion hole 202 on the side facing the second folding unit 300, and the second folding unit 300 has a second insertion hole 302 on the side facing the first folding unit 200. A synchronous shaft 800 is inserted into both the first insertion hole 202 and the second insertion hole 302. The synchronous shaft 800 extends along a second direction to connect the first folding unit 200 and the second folding unit 300 in a first direction, so that the first folding unit 200 and the second folding unit 300 cannot move relative to each other in the first direction. Thus, the first driving component 400 only needs to be connected to one of the first folding unit 200 and the second folding unit 300 to drive the first folding unit 200 and the second folding unit 300 to move. This simplifies the setting of the first driving component 400. That is, in this embodiment, the first driving component 400 is connected to the first folding unit 200 and connected to the second folding unit 300 through the first folding unit 200 and the synchronous shaft 800. This configuration ensures the synchronization of the movement of the first folding unit 200 and the second folding unit 300, thus guaranteeing the folding quality.

[0102] The synchronous shaft 800 can slide along the axial direction of the first insertion hole 202 and the second insertion hole 302, ensuring that the second drive assembly 500 can drive the first folding unit 200 and the second folding unit 300 to move towards or away from each other.

[0103] In addition, in other embodiments, the synchronous shaft 800 may not be provided, and the first folding unit 200 and the second folding unit 300 may be driven separately by the first driving component 400 to move along the first direction.

[0104] Reference Figure 1 and Figure 2 In this embodiment, the folding device 1000 further includes an end folding unit 900. There are two end folding units 900. Multiple first folding units 200 and multiple second folding units 300 are disposed between the two end folding units 900. That is, the two end folding units 900 are respectively disposed on the left and right sides of the multiple first folding units 200 (multiple second folding units 300).

[0105] Both end folding units 900 are provided with protruding end folding flanges 910, which are arranged opposite each other along a first direction. The two end folding units 900 are respectively fixedly connected to two first folding units 200 and two second folding units 300 at the left and right ends of a plurality of arranged first folding units 200. When processing a pocket that requires folding the fabric in the width direction of the bag opening, the first folding units 200, second folding units 300, and end folding units 900 are inserted into the bag opening. The first driving assembly 400 drives the plurality of first folding units 200 and the plurality of second folding units 300 to move towards both ends along the first direction, causing the two end folding units 900 to move opposite each other so that the fabric in the width direction of the bag opening is folded by the two end folding flanges 910. After folding, the first driving assembly 400 drives the plurality of first folding units 200 and second folding units 300 to move towards the center along the first direction, and the two end folding flanges 910 move towards each other to exit the bag opening. Therefore, the material bending device 1000 of this solution makes full use of the first drive assembly 400 without the need to set up an additional end bending drive.

[0106] Furthermore, in other embodiments, the end folding unit 900 may be fixedly connected only to the first folding unit 200. In other embodiments, the end folding unit 900 may be fixedly connected only to the second folding unit 300.

[0107] Reference Figure 8 In this embodiment, the first folding unit 200 includes a first connecting portion 210 and a first folding piece 220. The first connecting portion 210 is an L-shaped cubic component, which includes two orthogonal rectangular pillars. One rectangular pillar is parallel to the first folding seat 120 and is connected to the guide pillar 140 and the drive rod 430; the other rectangular pillar extends vertically and is connected to the first folding piece 220. The first folding flange 201 is connected to the end of the first folding piece 220 away from the first connecting portion 210.

[0108] The second folding unit 300 includes a second connecting portion 310 and a second folding piece 320. The second connecting portion 310 is an L-shaped cubic component, which includes two orthogonal rectangular pillars, one of which is parallel to the second folding seat 130 and connected to the guide pillar 140; the other rectangular pillar extends vertically and is connected to the second folding piece 320. The second folding flange 301 is connected to the end of the second folding piece 320 away from the second connecting portion 310.

[0109] In addition, in other embodiments, the first folding unit 200 and the second folding unit 300 may also be in other suitable forms.

[0110] Example 2

[0111] This embodiment discloses a material bending device 1000, which is substantially the same as the material bending device 1000 in Embodiment 1, except that the power component 410 and the drive component are different.

[0112] Reference Figure 9 In this embodiment, the driving component includes a driving shaft 450, which extends along a first direction and is rotatably disposed on the first folding seat 120. The power component 410 is a rotary driving mechanism such as a rotary motor or rotary cylinder, which is connected to the driving shaft 450 and can drive the driving shaft 450 to rotate circumferentially.

[0113] The drive shaft 450 has multiple drive grooves 440 on its outer periphery, which are spaced apart along the axial direction of the drive shaft 450. The drive grooves 440 are spirally arranged on the drive shaft 450, and the angle between the multiple drive grooves 440 and the radial section of the drive shaft 450 gradually increases or decreases along the axial direction of the drive shaft 450. Thus, when the outer periphery of the drive shaft 450 is unfolded into a rectangular plane, the multiple drive grooves 440 are arranged along a first direction, and the inclination angle between the multiple drive grooves 440 and the first direction gradually increases or decreases.

[0114] Multiple drive rods 430 are inserted one-to-one into drive grooves 440, and the ends of the multiple drive rods 430 away from drive grooves 440 are fixedly connected to multiple first folding units 200. When the power component 410 drives the drive shaft 450 to rotate, the drive groove 440 rotates relative to the drive rods 430, causing the drive rods 430 to slide relative to the drive groove 440 along the length direction of the drive groove 440, thereby driving the multiple drive rods 430 to move along the first direction, so as to drive the multiple first folding units 200 to move along the first direction.

[0115] Example 3

[0116] This embodiment discloses a folding device 1000, which is substantially the same as the folding device 1000 in Embodiment 1, except that the first driving component 400 is different.

[0117] Reference Figure 10 In this embodiment, the first driving assembly 400 includes a linear drive member and a scissor telescopic chain 470. The linear drive member is connected to the scissor telescopic chain 470 and is used to drive the scissor telescopic chain 470 to extend and retract along a first direction. A plurality of first folding units 200 are connected at intervals to the scissor telescopic chain 470.

[0118] The scissor-type telescopic chain 470 includes multiple scissor-type telescopic units 471. Each scissor-type telescopic unit 471 includes a first link 472 and a second link 473 arranged in a cross configuration. The centers of the first link 472 and the second link 473 are hinged together. The multiple scissor-type telescopic units 471 extend along a first direction and are interconnected. The end of the first link 472 of one scissor-type telescopic unit 471 is hinged to the end of the second link 473 of an adjacent scissor-type telescopic unit 471, thus forming a scissor-type telescopic structure. A first folding unit 200 is rotatably connected to the midpoint of the intersection of the first link 472 and the second link 473. When the scissor-type telescopic chain 470 extends or retracts, it drives the multiple first folding units 200 to move along the first direction.

[0119] Example 4

[0120] This embodiment discloses a folding device 1000, which is substantially the same as the folding device 1000 in Embodiment 1, except that the first driving component 400 is different.

[0121] In this embodiment, the first driving component 400 includes a plurality of cylinders that extend along a first direction. The piston rod of the cylinder is connected to the first folding unit 200, thereby driving the plurality of first folding units 200 to move along the first direction through the plurality of cylinders.

[0122] Example 5

[0123] This embodiment discloses a bag opening machine, which includes a frame, a frame pressing mechanism, a cutting mechanism, a sewing mechanism, and a folding device 1000. The frame pressing mechanism, the cutting mechanism, the sewing mechanism, and the folding device 1000 are disposed on the frame. The folding device 1000 is any one of the folding devices 1000 in Embodiments 1-4.

[0124] When the bag opening machine performs the bag opening process, the outer fabric is first placed on the pressing frame mechanism. The pressing frame mechanism fixes the outer fabric and moves to the cutting mechanism, where it cuts out the bag opening. Then, the pressing frame mechanism moves to the folding device 1000, which inserts into the bag opening to fold the fabric. After folding, the pressing frame mechanism moves away from the folding device 1000 and secures the bag fabric underneath the outer fabric. The pressing frame mechanism then moves to the sewing mechanism to sew the bag fabric and outer fabric together.

[0125] In the bag opening machine of this embodiment, since the folding device 1000 can adjust its size to adapt to the folding requirements of bag openings of different sizes, when processing bags with bag openings of different sizes, only the size of the folding device 1000 needs to be adjusted, and there is no need to replace the folding device 1000. Therefore, there is no need to set up multiple sets of folding devices 1000, which reduces the cost of the bag opening machine and improves the processing efficiency.

[0126] The above are merely preferred embodiments of the present invention. Therefore, all equivalent changes or modifications made in accordance with the structure, features and principles of the present invention patent application are included within the scope of the present invention patent application.

Claims

1. A material bending device, characterized in that, The bending device (1000) includes: Bracket (100); The first folding unit (200) is slidably disposed on the bracket (100). Multiple first folding units (200) are arranged in parallel along a first direction. The first folding unit (200) is provided with a first folding flange (201). A second folding unit (300) is disposed opposite to the first folding unit (200). The second folding unit (300) is slidably disposed on the bracket (100). Multiple second folding units (300) are arranged parallel to each other along a first direction. The second folding unit (300) is provided with a second folding flange (301). The first folding flange (201) and the second folding flange (301) are disposed opposite to each other along a second direction. The first direction is perpendicular to the second direction. A first driving component (400) is connected to the first folding unit (200) and / or the second folding unit (300) for driving the first folding unit (200) and the second folding unit (300) to move along the first direction to adjust the gap between the first folding unit (200) and the gap between the second folding unit (300); A second drive assembly (500) is connected to the first folding unit (200) and / or the second folding unit (300) for driving the first folding unit (200) and the second folding unit (300) to move toward or away from each other along the second direction.

2. A material bending device as described in claim 1, characterized in that, The bracket (100) includes a support base (110), a first folding base (120), and a second folding base (130). The first folding base (120) and the second folding base (130) are slidably disposed on the support base (110) along the second direction. The first folding unit (200) is slidably connected to the first folding base (120) along the first direction, and the second folding unit (300) is slidably connected to the second folding base (130) along the first direction. The second driving assembly (500) is connected to the first folding base (120) and the second folding base (130) and is used to drive the first folding base (120) and the second folding base (130) to slide towards or away from each other along the second direction.

3. A material bending device as described in claim 2, characterized in that, The first drive assembly (400) includes a power component (410), a drive component, and a plurality of drive rods (430). The drive component has a plurality of elongated drive grooves (440) arranged along the first direction. The drive grooves (440) are inclined relative to the first direction. Along the first direction, the inclination angle of the plurality of drive grooves (440) relative to the first direction gradually increases or gradually decreases. The plurality of drive rods (430) are inserted into the plurality of drive grooves (440) one by one. The power component (410) is connected to the drive component and is used to drive the drive component to move relative to the drive rods (430) so that the drive rods (430) slide relative to the inner wall of the drive grooves (440) along the length direction of the drive grooves (440). Multiple drive rods (430) are fixedly connected to the first folding unit (200) in a one-to-one correspondence, and the power component (410) is disposed on the first folding seat (120); and / or, multiple drive rods (430) are fixedly connected to the second folding unit (300) in a one-to-one correspondence, and the power component (410) is disposed on the second folding seat (130).

4. A material bending device as described in claim 3, characterized in that, The driving component includes a driving plate (420), and the power component (410) is connected to the driving plate (420) and can drive the driving plate (420) to move perpendicular to the first direction; a plurality of driving slots (440) are formed on the driving plate (420), and the driving slots (440) are long slots parallel to the driving plate (420).

5. A material bending device as described in claim 4, characterized in that, The driving groove (440) is a long straight groove, and the driving groove (440) satisfies: (1 / k1-1 / k2=M), where k1 and k2 are the slopes of the angles between any two adjacent driving grooves (440) and the first direction, and k1<k2, and M is a constant.

6. A material bending device as described in claim 4, characterized in that, The power component (410) includes a first drive motor (411), a first gear (412), and a first rack (413). The first rack (413) is fixedly connected to the drive plate (420). The first rack (413) is arranged perpendicular to the first direction. The first gear (412) meshes with the first rack (413). The first gear (412) is coaxially fixed to the shaft of the first drive motor (411).

7. A material bending device as described in claim 2, characterized in that, The first folding seat (120) is provided with a guide post (140), the guide post (140) extends along the first direction, and the first folding unit (200) is provided with a guide hole that slides and engages with the guide post (140); And / or, the second folding seat (130) is provided with a guide post (140) extending along the first direction, and the second folding unit (300) is provided with a guide hole that slides and engages with the guide post (140).

8. A material bending device as described in claim 1, characterized in that, The first folding unit (200) and the second folding unit (300) are arranged in a one-to-one correspondence. The first folding unit (200) is provided with a first insertion hole (202) on the side facing the second folding unit (300), and the second folding unit (300) is provided with a second insertion hole (302) on the side facing the first folding unit (200). A synchronous shaft (800) is inserted into both the first insertion hole (202) and the second insertion hole (302). The synchronous shaft (800) extends along the second direction and can slide along the axial direction of the first insertion hole (202) and the second insertion hole (302).

9. A material bending device as described in claim 1, characterized in that, The folding device (1000) further includes an end folding unit (900), and two end folding units (900) are provided. A plurality of first folding units (200) and a plurality of second folding units (300) are disposed between the two end folding units (900). Both end folding units (900) are provided with end folding flanges (910), and the two end folding flanges (910) are arranged opposite to each other along the first direction. Among the plurality of arranged first folding units (200), the two first folding units (200) at both ends are respectively fixedly connected to one end folding unit (900); and / or, among the plurality of arranged second folding units (300), the two second folding units (300) at both ends are respectively fixedly connected to one end folding unit (900).

10. A bag-opening machine, characterized in that, The bag opening machine includes a frame, a frame pressing mechanism, a cutting mechanism, a sewing mechanism, and a folding device (1000) as described in any one of claims 1-9, wherein the frame pressing mechanism, the cutting mechanism, the sewing mechanism, and the folding device (1000) are disposed on the frame.

Images