A width-adjustable folding knife device and bag opener

Abstract

The utility model discloses a width adjustable's folding knife device and bag opener, width adjustable's folding knife device includes base plate, folding knife subassembly, first transmission subassembly, second transmission subassembly, first power source and second power source, and folding knife subassembly includes the first folding knife subassembly and second folding knife subassembly of interval arrangement in the width direction of base plate, first transmission subassembly fixedly connected in first folding knife subassembly and movably connected in base plate, and first transmission subassembly still includes first rack, second transmission subassembly fixedly connected in second folding knife subassembly and movably connected in base plate, and second transmission subassembly still includes second rack, first power source is connected in base plate, and the output of first power source is connected with first gear, and first gear is engaged with first rack, second power source is connected in base plate, and the output of second power source is connected with second gear, and second gear is engaged with second rack. Can improve the adjustment efficiency to avoid the problem of low efficiency in prior art mode replacement.

Description

Technical Field

[0001] This utility model relates to the field of bag opening machine technology, and in particular to a folding knife device with adjustable width and a bag opening machine. Background Technology

[0002] A pocket-opening machine is a machine that uses a folding knife device to fold cut fabric and then sew it to form a pocket. Current pocket-opening machines use an upper folding knife device. The working principle of the upper folding knife device is as follows: when the entire upper folding knife device moves above the fabric, the lifting cylinder drives the four folding knives in four directions to descend to the four sides of the fabric. Simultaneously, the four horizontal cylinders actuate, folding the fabric, which is then clamped and sewn.

[0003] When the length and width dimensions of the pocket change, the operator first moves the upper folding knife device into the rectangular groove formed by the pocket, then loosens the fixing bolts of the horizontal cylinder seat on the device, and then pulls the folding knife module to align the folding knife with the four sides, fixes the horizontal cylinder seat, and resets the device to complete one mold changing operation on the folding knife device.

[0004] Completing a mold change operation involves numerous steps, which are tedious and time-consuming. After completion, the debugging personnel must fold the fabric to check if the machine has been properly debugged. If it fails, another mold change operation is required, resulting in low efficiency. Furthermore, this type of mold change operation demands a high level of practical experience and proficiency from the debugging personnel and is not universally applicable.

[0005] Therefore, how to avoid the problem of low mold-changing efficiency in the existing technology is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide a folding knife device and a bag opening machine with adjustable width, which can avoid the problem of low mold changing efficiency in the prior art.

[0007] To achieve the above objectives, this utility model provides a folding knife device with adjustable width, comprising:

[0008] substrate;

[0009] A folding blade assembly includes a first folding blade assembly and a second folding blade assembly, the first folding blade assembly and the second folding blade assembly being spaced apart in the width direction of the substrate;

[0010] The first transmission component is fixedly connected to the first folding blade component and movably connected to the base plate. The first transmission component is movable in the width direction. The first transmission component also includes a first rack that extends in the width direction.

[0011] The second transmission assembly is fixedly connected to the second folding blade assembly and movably connected to the base plate. The second transmission assembly is movable in the width direction. The second transmission assembly also includes a second rack that extends in the width direction.

[0012] A first power source is connected to the base plate. The output end of the first power source is connected to a first gear, which meshes with a first rack.

[0013] The second power source is connected to the base plate, and the output end of the second power source is connected to the second gear, which meshes with the second rack.

[0014] In one possible implementation, a first support assembly is provided between the first power source and the substrate, the first support assembly comprising:

[0015] The first housing is fixedly connected to the casing of the first power source;

[0016] A first mounting plate is fixedly connected to a first base and a base plate. The first mounting plate positions the first base above the base plate and has a first gap between it and the base plate. A first gear is located within the first gap.

[0017] In one possible implementation, the first transmission assembly further includes a first base plate located above the substrate, a first guide assembly provided between the first base plate and the substrate, the first base plate having a first groove for avoiding the first mounting plate, and a first rack fixedly connected above the first base plate and located within a first interval.

[0018] In one possible implementation, the first guiding component includes:

[0019] The first guide rail extends along the width direction and is fixedly connected to the substrate.

[0020] The first slider corresponds one-to-one with the first guide rail. The first slider is fixedly connected to the bottom of the first base plate, and the first slider slides in cooperation with the first guide rail.

[0021] In one possible implementation, the first transmission assembly further includes a first connecting plate, the top of which is connected to the first base plate, and the bottom of which is connected to the first folding knife assembly.

[0022] In one possible implementation, a second support assembly is provided between the second power source and the substrate, the second support assembly comprising:

[0023] The second housing is fixedly connected to the housing of the second power source;

[0024] The second mounting plate is fixedly connected to the second base and the base plate. The second mounting plate positions the second base above the base plate and there is a second gap between the second base and the base plate. The second gear is located within the second gap.

[0025] In one possible implementation, the second transmission assembly further includes a second base plate located above the base plate, a second guide assembly provided between the second base plate and the base plate, the second base plate having a second groove for avoiding the second mounting plate, and a second rack fixedly connected above the second base plate, and the second rack being located within a second interval.

[0026] In one possible implementation, the second guiding component includes:

[0027] The second guide rail extends along the width direction and is fixedly connected to the substrate.

[0028] The second slider corresponds one-to-one with the second guide rail. The second slider is fixedly connected to the bottom of the second base plate, and the second slider slides in conjunction with the second guide rail.

[0029] In one possible implementation, the second transmission assembly further includes a second connecting plate, the top of which is connected to the second base plate, and the bottom of which is connected to the second folding knife assembly.

[0030] Based on the above, this application also provides a bag opening machine, including the width-adjustable folding knife device of all the above embodiments.

[0031] Compared with the prior art, the technical solution provided by this utility model has at least the following beneficial effects: both the first power source and the second power source are connected to the substrate. The output end of the first power source is connected to a first gear. When the output end of the first power source drives the first gear to rotate, it drives the first rack meshing with the first gear to move in the width direction of the substrate, so that the first transmission assembly moves as a whole in the width direction of the substrate, thereby driving the first folding blade assembly to move in the width direction of the substrate; the output end of the second power source is connected to a second gear. When the output end of the second power source drives the second gear to rotate, it drives the second rack meshing with the second gear to move in the width direction of the substrate, so that the second transmission assembly moves as a whole in the width direction of the substrate, thereby driving the second folding blade assembly to move in the width direction of the substrate. The first and second power sources operate synchronously, controlling the rotation direction, number of rotations, and rotation angle of the first and second gears. This drives the first and second folding knife assemblies to move closer or further apart, adjusting their initial positions in the width direction of the base. This allows the first and second folding knife assemblies to be adapted to pockets of different widths, reducing the time spent manually adjusting their positions, improving adjustment efficiency, and avoiding the problem of low mold-changing efficiency in existing technologies. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0033] Figure 1 A schematic diagram of the adjustable-width folding knife device provided in an embodiment of this utility model;

[0034] Figure 2 This is a schematic diagram of the structure of the first transmission assembly and the second transmission assembly provided in the embodiments of this utility model;

[0035] Figure 3 This is a schematic diagram of the structure of the second support component provided in an embodiment of the present utility model;

[0036] Figure 4 This is a schematic diagram of the structure of the second transmission component provided in an embodiment of the present utility model.

[0037] in:

[0038] 100 - substrate, 110 - opening;

[0039] 200 - First Folding Knife Component;

[0040] 300 - Second Folding Knife Component;

[0041] 410 - First rack, 420 - First base plate, 430 - First connecting plate;

[0042] 510 - Second rack, 520 - Second base plate, 530 - Second connecting plate;

[0043] 600 - First power source; 610 - First gear;

[0044] 700 - Second power source; 710 - Second gear;

[0045] 800 - First support component, 810 - First base, 820 - First mounting plate;

[0046] 900 - First guide assembly, 910 - First guide rail, 920 - First slider;

[0047] 1000 - Second support component, 1010 - Second base, 1020 - Second mounting plate;

[0048] 1100 - Second guide assembly, 1110 - Second guide rail, 1120 - Second slider. Detailed Implementation

[0049] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0050] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0051] In the description of this utility model, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of this utility model.

[0052] The purpose of this invention is to provide a folding knife device and a bag opening machine with adjustable width, which can avoid the problem of low mold changing efficiency in the prior art.

[0053] Please see Figures 1 to 4 To achieve the above objectives, this utility model provides a width-adjustable folding knife device, including a base plate 100, a folding knife assembly, a first transmission assembly, a second transmission assembly, a first power source 600, and a second power source 700. The folding knife assembly includes a first folding knife assembly 200 and a second folding knife assembly 300, which are spaced apart in the width direction of the base plate 100, and the width direction of the base plate 100 coincides with the width direction of the rectangular groove formed by the pocket. The first transmission assembly is fixedly connected to the first folding knife assembly 200 and movably connected to the base plate 100. The first transmission assembly is movable in the width direction of the base plate 100 and also includes a first rack 410 extending along the width direction of the base plate 100. The second transmission assembly is fixedly connected to the second folding knife assembly 300 and movably connected to the base plate 100. The second transmission assembly is movable in the width direction of the base plate 100 and also includes a second rack 510 extending along the width direction of the base plate 100. A first power source 600 is connected to the substrate 100. The output end of the first power source 600 is connected to a first gear 610, which meshes with a first rack 410. A second power source 700 is connected to the substrate 100. The output end of the second power source 700 is connected to a second gear 710, which meshes with a second rack 510.

[0054] The first power source 600 may be, but is not limited to, an electric motor. A first coupling is provided between the output end of the first power source 600 and the first gear 610. The first coupling is used to drive the first gear 610 to rotate around its own axis and ensure the smooth operation of the first gear 610. The second power source 700 may be, but is not limited to, an electric motor. A second coupling is provided between the output end of the second power source 700 and the second gear 710. The second coupling is used to drive the second gear 710 to rotate around its own axis and ensure the smooth operation of the second gear 710.

[0055] Both the first power source 600 and the second power source 700 are connected to the substrate 100. The output end of the first power source 600 is connected to a first gear 610. When the output end of the first power source 600 drives the first gear 610 to rotate, it drives the first rack 410 meshing with the first gear 610 to move in the width direction of the substrate 100, so that the first transmission assembly moves as a whole in the width direction of the substrate 100, thereby driving the first folding blade assembly 200 to move in the width direction of the substrate 100. The output end of the second power source 700 is connected to a second gear 710. When the output end of the second power source 700 drives the second gear 710 to rotate, it drives the second rack 510 meshing with the second gear 710 to move in the width direction of the substrate 100, so that the second transmission assembly moves as a whole in the width direction of the substrate 100, thereby driving the second folding blade assembly 300 to move in the width direction of the substrate 100. The first power source 600 and the second power source 700 operate synchronously, controlling the rotation direction, number of rotations, and rotation angle of the first gear 610 and the second gear 710. This drives the first folding knife assembly 200 and the second folding knife assembly 300 to move closer or further apart, adjusting their initial positions in the width direction of the base. This allows the first folding knife assembly 200 and the second folding knife assembly 300 to be suitable for pockets of different widths. When the pocket width changes, the distance between the first folding knife assembly 200 and the second folding knife assembly 300 can be adjusted without manual disassembly or reassembly of parts, reducing the time spent manually adjusting their positions. The angle through which the motor output rotates controls the rotation of the first gear 610 and the second gear 710, achieving high precision in adjusting the folding knife module and improving adjustment efficiency, thus avoiding the problem of low mold-changing efficiency in existing technologies. In addition, a display screen for outputting instructions can be added. The mold changing process of the first folding knife assembly 200 and the second folding knife assembly 300 can be carried out simultaneously by operating the display screen. Automatic adjustment replaces manual adjustment, which increases the automation level of the machine and reduces the labor intensity of the workers.

[0056] In one possible implementation, a first support assembly 800 is provided between the first power source 600 and the substrate 100. The first support assembly 800 includes a first base 810 and a first mounting plate 820. The first base 810 has a plate-like structure and a first connecting hole. The housing of the first power source 600 has a second connecting hole corresponding to the first connecting hole. A first connector passes through the first connecting hole and connects to the second connecting hole, so that the first base 810 is fixedly connected to the housing of the first power source 600. The first and second connecting holes may be, but are not limited to, threaded holes, and the first connector may be, but is not limited to, a screw, to facilitate the installation and removal of the first base 810 and the housing of the first power source 600.

[0057] A first mounting plate 820 is fixedly connected to a first base 810 and a base plate 100. The first mounting plate 820 is connected to the upper surface of the base plate 100, and the first mounting plate 820 includes a first plate and a second plate extending in the height direction, which are perpendicular to each other. The first base 810 is connected to the top of the second plate. Specifically, the first base 810 has a third connecting hole, and the second plate has a fourth connecting hole corresponding to the third connecting hole. A second connector passes through the third connecting hole and connects to the fourth connecting hole, so that the first base 810 is fixedly connected to the second plate. The third and fourth connecting holes may be, but are not limited to, threaded holes, and the second connector may be, but is not limited to, screws, to facilitate the installation and removal of the first base 810 and the second plate. The first mounting plate 820 is positioned such that the first base 810 is located above the base plate 100 and there is a first gap between it and the base plate 100. The first gear 610 is located within the first gap. At least a portion of the output end of the first power source 600 is located within the first gap and, through the first coupling, drives the first gear 610 located within the first gap to rotate.

[0058] In one possible implementation, the first transmission assembly further includes a first base plate 420, which is located above the base plate 100. A first rack 410 is fixedly connected to the top of the first base plate 420. Specifically, the first rack 410 has a first mounting hole, and the first base plate 420 has a second mounting hole corresponding to the first mounting hole. A first fastener passes through the first mounting hole and is connected to the second mounting hole. There are two first and two mounting holes, which can be, but are not limited to, threaded holes. The first fastener can be, but is not limited to, a screw, to facilitate the installation and removal of the first rack 410 and the first base plate 420.

[0059] A first guide assembly 900 is provided between the first base plate 420 and the substrate 100. The first guide assembly 900 includes a first guide rail 910 and a first slider 920. The first guide rail 910 extends along the width direction of the substrate 100 and is fixedly connected to the substrate 100. A first slider 920 corresponds one-to-one with the first guide rail 910 and is fixedly connected to the bottom of the first base plate 420, slidingly engaging with the first guide rail 910. Two first guide rails 910 can be provided, and the two first guide rails 910 are parallel and spaced apart. Correspondingly, two spaced first sliders 920 are provided at the bottom of the first base plate 420. One first slider 920 is movably connected to one first guide rail 910, and the other first slider 920 is movably connected to the other first guide rail 910. When the first gear 610 rotates, the first rack 410 moves along the width direction of the substrate 100 under the guidance of the first guide assembly 900.

[0060] The first base plate 420 is provided with a first groove for avoiding the first mounting plate 820, so that the first base plate 420 does not come into contact with the first mounting plate 820 during the movement of the first base plate 100 in the width direction, thereby avoiding interference. The first rack 410 is located within the first gap to ensure that the first rack 410 and the first rack 410 are in a meshing state. The first rack 410 also does not come into contact with the first mounting plate 820 during the movement of the first rack 410 in the width direction of the base plate 100.

[0061] In one possible implementation, the substrate 100 has a through opening 110 in the height direction. The first transmission assembly further includes a first connecting plate 430. The top of the first connecting plate 430 passes through the opening 110 and is located above the substrate 100 to connect with the first base plate 420. The bottom of the first connecting plate 430 is located below the substrate 100 and is connected with the first folding blade assembly 200. The connection between the first connecting plate 430 and the first base plate 420, and the connection between the first connecting plate 430 and the first folding blade assembly 200, can be made using screws, bolts, etc. The first connecting plate 430 is used to drive the first folding blade assembly 200 to move synchronously when the first base plate 420 moves.

[0062] In one possible implementation, a second support assembly 1000 is provided between the second power source 700 and the base plate 100. The second support assembly 1000 includes a second base 1010 and a second mounting plate 1020. The second base 1010 has a plate-like structure and is provided with a fifth connecting hole. The housing of the second power source 700 is provided with a sixth connecting hole corresponding to the fifth connecting hole. A third connector passes through the fifth connecting hole and connects to the sixth connecting hole, so that the second base 1010 is fixedly connected to the housing of the second power source 700. The fifth and sixth connecting holes may be, but are not limited to, threaded holes, and the third connector may be, but is not limited to, screws, to facilitate the installation and removal of the second base 1010 and the housing of the second power source 700.

[0063] The second mounting plate 1020 is fixedly connected to the second base 1010 and the substrate 100. The second mounting plate 1020 is connected to the upper surface of the substrate 100, and includes a third plate and a fourth plate extending in the height direction. The third plate and the fourth plate are perpendicular to each other. The second base 1010 is connected to the top of the fourth plate. Specifically, the second base 1010 is provided with a seventh connecting hole, and the fourth plate is provided with an eighth connecting hole corresponding to the seventh connecting hole. The fourth connector passes through the seventh connecting hole and connects to the eighth connecting hole, so that the second base 1010 is fixedly connected to the fourth plate. The seventh connecting hole and the eighth connecting hole may be, but are not limited to, threaded holes, and the fourth connector may be, but are not limited to, screws, to facilitate the installation and removal of the second base 1010 and the fourth plate. The second mounting plate 1020 is configured such that the second seat 1010 is located above the base plate 100 and there is a second gap between it and the base plate 100. The second gear 710 is located within the second gap. At least a portion of the output end of the second power source 700 is located within the second gap and drives the second gear 710 located within the second gap to rotate via the second coupling.

[0064] In one possible implementation, the second transmission assembly further includes a second base plate 520, which is located above the base plate 100. A second rack 510 is fixedly connected to the top of the second base plate 520. Specifically, the second rack 510 has a third mounting hole, and the second base plate 520 has a fourth mounting hole corresponding to the third mounting hole. A second fastener passes through the third mounting hole and connects to the fourth mounting hole. There are two third and four mounting holes, which can be, but are not limited to, threaded holes. The second fastener can be, but is not limited to, a screw, to facilitate the installation and removal of the second rack 510 and the second base plate 520.

[0065] A second guide assembly 1100 is provided between the second base plate 520 and the base plate 100. The second guide assembly 1100 includes a second guide rail 1110 and a second slider 1120. The second guide rail 1110 extends along the width direction of the base plate 100 and is fixedly connected to the base plate 100. The second slider 1120 corresponds one-to-one with the second guide rail 1110 and is fixedly connected to the bottom of the second base plate 520. The second slider 1120 slides in cooperation with the second guide rail 1110. Two second guide rails 1110 can be provided, and the two second guide rails 1110 are parallel and spaced apart. Correspondingly, two spaced second sliders 1120 are provided at the bottom of the second base plate 520. One second slider 1120 is movably connected to one second guide rail 1110, and the other second slider 1120 is movably connected to the other second guide rail 1110. When the second gear 710 rotates, the second rack 510 moves along the width direction of the substrate 100 under the guidance of the second guide assembly 1100.

[0066] The second base plate 520 is provided with a second groove for avoiding the second mounting plate 1020, so that the second base plate 520 does not come into contact with the second mounting plate 1020 during the movement of the base plate 100 in the width direction, thereby avoiding interference. The second rack 510 is located within the second interval to ensure that the second rack 510 and the second rack 510 are in a meshing state. The second rack 510 also does not come into contact with the second mounting plate 1020 during the movement of the base plate 100 in the width direction.

[0067] In one possible implementation, the second transmission assembly further includes a second connecting plate 530. The top of the second connecting plate 530 passes through the opening 110 and is located above the substrate 100 to connect with the second base plate 520. The bottom of the second connecting plate 530 is located below the substrate 100 and is connected with the second folding blade assembly 300. The connection between the second connecting plate 530 and the second base plate 520, and the connection between the second connecting plate 530 and the second folding blade assembly 300, can be achieved using screws, bolts, etc. The second connecting plate 530 is used to drive the second folding blade assembly 300 to move synchronously when the second base plate 520 moves.

[0068] Based on the above, this application also provides a bag opening machine, including the width-adjustable folding knife device of all the above embodiments. The bag opening machine also has all the beneficial effects of the width-adjustable folding knife device. The remaining structure of the bag opening machine can be referred to the prior art, and will not be described in detail here.

[0069] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0070] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0071] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A folding knife device with adjustable width, characterized in that, include: substrate(100); The folding knife assembly includes a first folding knife assembly (200) and a second folding knife assembly (300), the first folding knife assembly (200) and the second folding knife assembly (300) being spaced apart in the width direction of the substrate (100); A first transmission assembly is fixedly connected to the first folding knife assembly (200) and movably connected to the base plate (100). The first transmission assembly is movable in the width direction. The first transmission assembly also includes a first rack (410) that extends along the width direction. The second transmission assembly is fixedly connected to the second folding blade assembly (300) and movably connected to the base plate (100). The second transmission assembly is movable in the width direction. The second transmission assembly also includes a second rack (510) that extends along the width direction. A first power source (600) is connected to the base plate (100), and the output end of the first power source (600) is connected to a first gear (610) that meshes with the first rack (410). The second power source (700) is connected to the substrate (100), and the output end of the second power source (700) is connected to a second gear (710) that meshes with the second rack (510).

2. The width-adjustable folding knife device according to claim 1, characterized in that, A first support assembly (800) is provided between the first power source (600) and the substrate (100), the first support assembly (800) comprising: The first housing (810) is fixedly connected to the housing of the first power source (600); A first mounting plate (820) is fixedly connected to the first seat (810) and the substrate (100). The first mounting plate (820) positions the first seat (810) above the substrate (100) and has a first gap between it and the substrate (100). The first gear (610) is located within the first gap.

3. The width-adjustable folding knife device according to claim 2, characterized in that, The first transmission assembly further includes a first base plate (420), which is located above the substrate (100). A first guide assembly (900) is provided between the first base plate (420) and the substrate (100). The first base plate (420) is provided with a first groove for avoiding the first mounting plate (820). The first rack (410) is fixedly connected above the first base plate (420) and is located within the first interval.

4. The width-adjustable folding knife device according to claim 3, characterized in that, The first guide component (900) includes: The first guide rail (910) extends along the width direction and is fixedly connected to the substrate (100). The first slider (920) corresponds one-to-one with the first guide rail (910). The first slider (920) is fixedly connected to the bottom of the first base plate (420), and the first slider (920) slides in cooperation with the first guide rail (910).

5. The width-adjustable folding knife device according to claim 3, characterized in that, The first transmission assembly further includes a first connecting plate (430), the top of which is connected to the first base plate (420), and the bottom of which is connected to the first folding knife assembly (200).

6. The width-adjustable folding knife device according to any one of claims 1-5, characterized in that, A second support assembly (1000) is provided between the second power source (700) and the substrate (100), the second support assembly (1000) comprising: The second housing (1010) is fixedly connected to the housing of the second power source (700); The second mounting plate (1020) is fixedly connected to the second seat (1010) and the substrate (100). The second mounting plate (1020) positions the second seat (1010) above the substrate (100) and has a second gap between it and the substrate (100). The second gear (710) is located within the second gap.

7. The width-adjustable folding knife device according to claim 6, characterized in that, The second transmission assembly further includes a second base plate (520), which is located above the substrate (100). A second guide assembly (1100) is provided between the second base plate (520) and the substrate (100). The second base plate (520) is provided with a second groove for avoiding the second mounting plate (1020). The second rack (510) is fixedly connected above the second base plate (520) and is located within the second interval.

8. The width-adjustable folding knife device according to claim 7, characterized in that, The second guide component (1100) includes: The second guide rail (1110) extends along the width direction and is fixedly connected to the substrate (100). The second slider (1120) corresponds one-to-one with the second guide rail (1110). The second slider (1120) is fixedly connected to the bottom of the second base plate (520), and the second slider (1120) slides in cooperation with the second guide rail (1110).

9. The width-adjustable folding knife device according to claim 7, characterized in that, The second transmission assembly also includes a second connecting plate (530), the top of which is connected to the second base plate (520), and the bottom of which is connected to the second folding knife assembly (300).

10. A bag-opening machine, characterized in that, Includes the width-adjustable folding knife device as described in any one of claims 1-9.

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