A folding knife device and bag opener

Abstract

The utility model discloses a folding knife device and bag opening machine relates to bag opening machine technical field, and folding knife device includes base plate, the first support plate of being connected to base plate, the power source of being connected to the first support plate, the first synchronous wheel of being connected with power source output end, with the first support plate is connected with first synchronous wheel and is spaced apart in height direction second synchronous wheel, the synchronous belt of being connected to first synchronous wheel and second synchronous wheel, the clamping piece of fixedly connected to synchronous belt, with the two folding knife subassembly of clamping piece through transmission component connection, and first guide component, two folding knife subassembly interval arrangement in the width direction of base plate, and first guide component is used for guiding two folding knife subassembly and slides in the width direction, and the output end of power source is used for driving clamping piece and moves in height direction to drive two folding knife subassembly and is close to or away from in the width direction. Can improve the adjustment efficiency, avoid the problem of low efficiency in prior art mode.

Description

Technical Field

[0001] This utility model relates to the field of bag opening machine technology, and in particular to a folding knife device 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 that 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, including a base plate, a first support plate connected to the base plate, a power source connected to the first support plate, a first synchronous wheel connected to the output end of the power source, a second synchronous wheel connected to the first support plate and spaced apart from the first synchronous wheel in the height direction, a synchronous belt connected to the first and second synchronous wheels, a clamp fixedly connected to the synchronous belt, two sets of folding knife assemblies connected to the clamp via a transmission assembly, and a first guide assembly. The two sets of folding knife assemblies are spaced apart in the width direction of the base plate. The first guide assembly is used to guide the two sets of folding knife assemblies to slide in the width direction. The output end of the power source is used to drive the clamp to move in the height direction to drive the two sets of folding knife assemblies closer or further apart in the width direction.

[0008] In one possible implementation, the second synchronous pulley is connected to the first support plate via a fixing frame. The fixing frame has a first connecting hole, and the first support plate has a second connecting hole. A connector passes through the first connecting hole and is then connected to the second connecting hole, so that the fixing frame and the first support plate are fixedly connected.

[0009] In one possible implementation, the first connecting hole is a strip-shaped hole extending along the height direction, and the connector can be inserted at different positions in the first connecting hole to adjust the position of the fixing frame in the height direction.

[0010] In one possible implementation, the fixing frame has two first through holes spaced apart in the width direction, bearings are provided in the first through holes, the rotating shaft passes through the bearings, and the second synchronous pulley is sleeved on the rotating shaft, with the second synchronous pulley located between the two bearings.

[0011] In one possible implementation, the transmission assembly includes:

[0012] The lifting plate is connected to the clamping plate via the first connecting plate;

[0013] A fixed plate is fixedly connected to the lifting plate, and a third connection hole is provided on the fixed plate;

[0014] The fixing rod passes through the third connecting hole and is then fixed. The fixing rod includes two connecting parts extending out of the third connecting hole, and the two connecting parts are located on both sides of the fixing plate.

[0015] Two mounting brackets, each corresponding to a folding knife assembly, are connected to the two folding knife assemblies respectively;

[0016] Two connecting rods correspond one-to-one with the fixed seat and the connecting part. One end of the connecting rod is hinged to the connecting part, and the other end of the connecting rod is hinged to the fixed seat.

[0017] In one possible implementation, the lifting plate is provided with a clearance groove for avoiding the fixed frame.

[0018] In one possible implementation, the folding knife assembly includes:

[0019] The second connecting plate is fixedly connected to the fixed base;

[0020] A fixing block is fixedly connected to the second connecting plate, and the fixing block is located below the base plate;

[0021] The folding knife connects to the bottom of the second connecting plate.

[0022] In one possible implementation, the first guiding component includes:

[0023] The first guide rail is connected to the side of the substrate facing the fixing block, and the first guide rail extends in the width direction;

[0024] The first slider is connected to the side of the fixed block facing the substrate, and the first slider slides in cooperation with the first guide rail.

[0025] In one possible implementation, the first support plate is provided with a groove, and a second guide assembly is provided between the first connecting plate and the bottom surface of the groove, the second guide assembly comprising:

[0026] The second guide rail is connected to the bottom surface of the tank and extends along the height direction;

[0027] The second slider corresponds one-to-one with the second guide rail. The second slider is connected to the side of the first connecting plate facing the first support plate, and the second slider slides in cooperation with the second guide rail.

[0028] Based on the above, this application also provides a bag opening machine, including the folding knife device of all the above embodiments.

[0029] Compared with the prior art, the technical solution provided by this utility model has at least the following beneficial effects: the first synchronous wheel is connected to the output end of the power source, the second synchronous wheel is connected to the first support plate and is spaced apart from the first synchronous wheel in the height direction, the synchronous belt is connected to the first synchronous wheel and the second synchronous wheel, the output end of the power source drives the first synchronous wheel to rotate, thereby driving the synchronous belt to move, so that the clamp fixedly connected to the synchronous belt moves in the height direction, so that the two sets of folding knife assemblies connected to the clamp through the transmission component slide in the width direction of the substrate under the guidance of the first guide component, so that the two sets of folding knife assemblies move closer to each other or further away from each other. By controlling the rotation direction, number of rotations and rotation angle of the first synchronous wheel, the initial position of the two sets of folding knife assemblies in the width direction of the substrate can be adjusted, so that the two sets of folding knife assemblies can be used to adapt to pockets of different widths, reducing the time for manually adjusting the position of the folding knife assemblies, improving the adjustment efficiency, and avoiding the problem of low mold changing efficiency in the prior art. Attached Figure Description

[0030] 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.

[0031] Figure 1 This is a schematic diagram of the folding knife device provided in an embodiment of the present utility model;

[0032] Figure 2 This is a schematic diagram of the transmission assembly provided in an embodiment of the present utility model;

[0033] Figure 3This is a schematic diagram of the folding knife assembly provided in an embodiment of the present invention.

[0034] in:

[0035] 100-substrate;

[0036] 200 - First support plate, 210 - Second connecting hole;

[0037] 300 - Power source, 310 - First synchronizing pulley;

[0038] 400 - Second Synchronizing Pulley;

[0039] 500 - Synchronous belt, 510 - Clip;

[0040] 610-Lifting plate, 611-Allowing groove, 620-Fixing plate, 630-Fixing rod, 640-Fixing seat, 650-Connecting rod, 660-First connecting plate;

[0041] 700-Folding knife assembly, 710-Second connecting plate, 720-Fixing block, 730-Folding knife;

[0042] 800 - First guide assembly, 810 - First guide rail, 820 - First slider;

[0043] 900 - Fixture, 910 - First connecting hole, 920 - Bearing, 930 - Rotating shaft;

[0044] 1000 - Connector;

[0045] 1100 - Second guide assembly, 1110 - Second guide rail, 1120 - Second slider;

[0046] 1200 - Second support plate. Detailed Implementation

[0047] 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.

[0048] 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.

[0049] 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.

[0050] The purpose of this invention is to provide a folding knife device and a bag opening machine that can avoid the problem of low mold changing efficiency in the prior art.

[0051] Please see Figures 1 to 3 To achieve the above objectives, this utility model provides a folding knife device, including a base plate 100, a first support plate 200 connected to the base plate 100, a power source 300 connected to the first support plate 200, a first synchronous pulley 310 connected to the output end of the power source 300, a second synchronous pulley 400 connected to the first support plate 200 and spaced apart from the first synchronous pulley 310 in the height direction, a synchronous belt 500 connected to the first synchronous pulley 310 and the second synchronous pulley 400, and a clamping piece 510 fixedly connected to the synchronous belt 500. The system includes two sets of folding knife assemblies 700 connected to the clip 510 via a transmission assembly, and a first guide assembly 800. The two sets of folding knife assemblies 700 are spaced apart in the width direction of the substrate 100, and the width direction of the substrate 100 is consistent with the width direction of the rectangular groove formed by the pocket. The first guide assembly 800 is used to guide the two sets of folding knife assemblies 700 to slide in the width direction. The output end of the power source 300 is used to drive the clip 510 to move in the height direction so as to drive the two sets of folding knife assemblies 700 to move closer or further apart in the width direction.

[0052] A second support plate 1200 is provided between the substrate 100 and the first support plate 200. The second support plate 1200 is a vertically extending plate structure. Its bottom is connected to the upper surface of the substrate 100, so that its top is at a certain distance from the substrate 100 in the height direction. The tops of the first support plate 200 and the second support plate 1200 are connected. The first support plate 200 is provided with a first threaded hole, and the second support plate 1200 is provided with a second threaded hole that corresponds one-to-one with the first threaded hole. The screw passes through the first threaded hole and is connected to the second threaded hole, so that the first support plate 200 and the second support plate 1200 are fixedly connected. The power source 300 can be, but is not limited to, a motor. The housing of the motor is fixedly connected to the first support plate 200. The output shaft of the motor extends along the width direction of the substrate 100 and is connected to the first synchronous pulley 310 through a coupling, so as to drive the first synchronous pulley 310 to rotate around its own axis.

[0053] The first synchronous pulley 310 is connected to the output end of the power source 300. The second synchronous pulley 400 is connected to the first support plate 200 and is spaced apart from the first synchronous pulley 310 in the height direction. The synchronous belt 500 is connected to the first synchronous pulley 310 and the second synchronous pulley 400. The output end of the power source 300 drives the first synchronous pulley 310 to rotate, thereby driving the synchronous belt 500 to move. This causes the clamp 510, which is fixedly connected to the synchronous belt 500, to move in the height direction. This allows the two sets of folding blade assemblies 700, which are connected to the clamp 510 via the transmission assembly, to slide in the width direction of the base plate 100 under the guidance of the first guide assembly 800, so that the two sets of folding blade assemblies 700 move closer to each other. Alternatively, by controlling the rotation direction, number of rotations, and rotation angle of the first synchronous wheel 310, the initial positions of the two sets of folding knife assemblies 700 in the width direction of the substrate 100 can be adjusted. This allows the two sets of folding knife assemblies 700 to be adapted to pockets of different widths. When the pocket width changes, the distance between the two folding knife assemblies 700 can be adjusted without manual disassembly or reassembly of parts, reducing the time spent manually adjusting the position of the folding knife assemblies 700. The angle of the motor rotation controls the displacement distance of the clamping piece 510, achieving high precision in the adjustment of the folding knife 730 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 corresponding mold-changing process can be completed simply by operating through the display screen. Automatic adjustment replaces manual adjustment, increasing the automation level of the machine and reducing the labor intensity of the workers.

[0054] In one possible implementation, the second synchronous pulley 400 is connected to the first support plate 200 via a fixing frame 900. The fixing frame 900 has two first through holes spaced apart in the width direction. A bearing 920 is installed in each of the first through holes. A rotating shaft 930 passes through the bearing 920 and is fixed relative to the inner ring of the bearing 920. The second synchronous pulley 400 is sleeved on the rotating shaft 930 and is located between the two bearings 920. The second synchronous pulley 400 is fixedly connected to the rotating shaft 930. Specifically, the second synchronous pulley 400 has a second through hole for the rotating shaft 930 to pass through and a fixing hole communicating with the second through hole. After the rotating shaft 930 passes through the second through hole, a first fixing member is installed into the fixing hole, and the rotating shaft 930 is pressed by the first fixing member to limit the relative rotation of the rotating shaft 930 and the second synchronous pulley 400.

[0055] The mounting bracket 900 has a first connecting hole 910, and the first support plate 200 has a second connecting hole 210. A connector 1000 passes through the first connecting hole 910 and connects to the second connecting hole 210, thus fixing the mounting bracket 900 and the first support plate 200 together. The first connecting hole 910 is a strip-shaped hole extending along the height direction. The connector 1000 can pass through different positions in the first connecting hole 910 to adjust the position of the mounting bracket 900 in the height direction. There are two first connecting holes 910 and four second connecting holes 210, with two second connecting holes 210 corresponding to one first connecting hole 910. The two second connecting holes 210 corresponding to one first connecting hole 910 are spaced apart in the height direction. The four connectors 1000 connect the mounting bracket 900 and the first support plate 200, resulting in better stability.

[0056] The second connecting hole 210 can be a threaded hole, and the connector 1000 can be a bolt or screw. Loosening the connector 1000 allows the fixing frame 900 to move in the height direction to adjust the position of the fixing frame 900 in the height direction, thereby adjusting the distance between the second synchronous pulley 400 and the first synchronous pulley 310 in the height direction and adjusting the tension of the synchronous belt 500. After adjustment, tightening the connector 1000 will fix the fixing frame 900 and the first support plate 200 relative to each other, thus fixing the distance between the second synchronous pulley 400 and the first synchronous pulley 310 in the height direction.

[0057] In one possible implementation, the transmission assembly includes a lifting plate 610, a fixing plate 620, a fixing rod 630, two fixing seats 640, and two connecting rods 650. The lifting plate 610 is connected to the clamping plate 510 via a first connecting plate 660. The clamping plate 510 includes a first plate body and a second plate body. The first plate body includes a first vertical portion that fits against one side of the timing belt 500 and a second vertical portion that is vertically connected to the first vertical portion. The second plate body fits against the side of the timing belt 500 away from the first vertical portion. The first vertical portion has a first threaded hole, and the second plate body has a second threaded hole corresponding to the first threaded hole. A screw passes through the first threaded hole and connects to the second threaded hole to fix the first vertical portion and the second plate body together and clamp them synchronously. The second vertical portion is connected to the first connecting plate 660 by screws or bolts. The lifting plate 610 is connected to the bottom of the first connecting plate 660. The lifting plate 610 is provided with a clearance groove 611, which is used to avoid interference with the fixed frame 900 during the lifting plate 610's upward or downward movement. At the same time, the clearance groove 611 can reduce the weight of the lifting plate 610, thereby reducing the load.

[0058] A fixing plate 620 is fixedly connected to a lifting plate 610, and a third connecting hole is provided on the fixing plate 620. A fixing rod 630 passes through the third connecting hole and is fixed thereafter. The fixing rod 630 includes two connecting parts extending out of the third connecting hole, and the two connecting parts are located on both sides of the fixing plate 620. Two fixing seats 640 correspond one-to-one with the folding knife assembly 700, and the two fixing seats 640 are respectively connected to the two folding knife assemblies 700. A connecting rod 650 corresponds one-to-one with the fixing seat 640, and the connecting rod 650 corresponds one-to-one with the connecting part. One end of the connecting rod 650 is hinged to the connecting part, and the other end of the connecting rod 650 is hinged to the fixing seat 640. The end of the connecting rod 650 that is hinged to the connecting part can be configured as a swing structure, and the end of the connecting rod 650 that is hinged to the fixing seat 640 can be configured as a fisheye connector, so that when the connecting rod 650 is raised or lowered, it drives the two fixing seats 640 to automatically adjust symmetrically, so that the two fixing seats 640 move closer to each other or further away from each other in the width direction of the base plate 100.

[0059] The fixed plate 620 has a third threaded hole, and the lifting plate 610 has a fourth threaded hole. The screw passes through the third threaded hole and connects to the fourth threaded hole to fix the fixed plate 620 and the lifting plate 610 relative to each other. The fixed plate 620 is located on the side of the lifting plate 610 away from the second support plate 1200. The fixed plate 620 also has a fourth connecting hole that communicates with the third connecting hole. The second fixing member is connected to the second connecting hole 210, and the end of the second fixing member facing the fixing rod 630 can be screwed into the third connecting hole to fix the fixing rod 630, so that both connecting parts of the fixing rod 630 are located outside the third connecting hole, so that the two connecting rods 650 can be connected to the corresponding connecting parts.

[0060] The clamping piece 510 is connected to the lifting plate 610 via the first connecting plate 660. The lifting plate 610 is connected to the fixing plate 620. The fixing rod 630 is connected to the fixing plate 620. The motor rotation drives the clamping piece 510 to move up and down. The clamping piece 510 drives the lifting plate 610, the fixing plate 620, and the fixing rod 630 to move up and down in the height direction. One end of the connecting rod 650 is connected to the connecting part, and the other end of the connecting rod 650 is connected to the fixing seat 640. Under the action of the connecting rod 650, the fixing seat 640 has an upward tendency. However, due to the limitation of the first guide component 800, the fixing seats 640 can only move closer to each other or further away from each other in the width direction of the substrate 100 to adjust the distance between the two folding blade components 700 in the width direction of the substrate 100.

[0061] In one possible implementation, the substrate 100 has a through opening in the height direction. Each folding blade assembly 700 includes a second connecting plate 710, a fixing block 720, and a folding blade 730. The top of the second connecting plate 710 passes through the opening and is fixedly connected to the fixing base 640. The bottom of the connecting plate is located below the substrate 100. The connection between the connecting plate and the fixing base 640 can be, but is not limited to, a screw connection or a bolt connection. The fixing block 720 is fixedly connected to the second connecting plate 710 and is located below the substrate 100. The folding blade 730 is connected to the bottom of the second connecting plate 710. The folding blade 730 is connected to the bottom of the second connecting plate 710. The second connecting plate 710 has a first mounting hole, and the folding blade 730 has a second mounting hole coaxially arranged with the first mounting hole. The third fastener passes through the first mounting hole and is connected to the second mounting hole to fix the second connecting plate 710 and the folding blade 730. The first and second mounting holes can be, but are not limited to, threaded holes, and the third fastener can be, but is not limited to, a screw.

[0062] In one possible implementation, the first guide assembly 800 includes a first guide rail 810 and a first slider 820. The first guide rail 810 is connected to the side of the substrate 100 facing the fixing block 720 and extends along the width direction. The first slider 820 is connected to the side of the fixing block 720 facing the substrate 100 and slides in engagement with the first guide rail 810. There are two first guide rails 810, which are parallel and spaced apart. Each fixing block 720 is connected to two first sliders 820, allowing each fixing block 720 to connect to both first guide rails 810. Specifically, one first slider 820 connected to the fixing block 720 engages with one first guide rail 810, and the other first slider 820 connected to the fixing block 720 engages with the other first guide rail 810, thereby improving the stability of the movement of the fixing blocks 720. The two fixing blocks 720 share a set of first guide rails 810 to prevent deviation in the movement direction of the two fixing blocks 720.

[0063] In one possible implementation, the first support plate 200 has a groove, and a second guide assembly 1100 is provided between the first connecting plate 660 and the bottom surface of the groove. The second guide assembly 1100 includes a second guide rail 1110 and a second slider 1120. The second guide rail 1110 is connected to the bottom surface of the groove and extends along the height direction. The second slider 1120 corresponds one-to-one with the second guide rail 1110 and is connected to the side of the first connecting plate 660 facing the first support plate 200. The second slider 1120 slides in cooperation with the second guide rail 1110. This guide assembly guides the first connecting plate 660 to move in the height direction.

[0064] Based on the above, this application also provides a bag opening machine, including the folding knife device of all the above embodiments. The bag opening machine also has all the beneficial effects of the 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.

[0065] 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.

[0066] 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.

[0067] 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, characterized in that, The system includes a substrate (100), a first support plate (200) connected to the substrate (100), a power source (300) connected to the first support plate (200), a first synchronous pulley (310) connected to the output end of the power source (300), a second synchronous pulley (400) connected to the first support plate (200) and spaced apart from the first synchronous pulley (310) in the height direction, a synchronous belt (500) connecting the first synchronous pulley (310) and the second synchronous pulley (400), and a clamp fixedly connected to the synchronous belt (500). (510), two sets of folding knife assemblies (700) connected to the clamp (510) via a transmission assembly, and a first guide assembly (800). The two sets of folding knife assemblies (700) are spaced apart in the width direction of the substrate (100). The first guide assembly (800) is used to guide the two sets of folding knife assemblies (700) to slide in the width direction. The output end of the power source (300) is used to drive the clamp (510) to move in the height direction to drive the two sets of folding knife assemblies (700) to move closer or further away in the width direction.

2. The folding knife device according to claim 1, characterized in that, The second synchronous pulley (400) is connected to the first support plate (200) through a fixing frame (900). The fixing frame (900) is provided with a first connecting hole (910), and the first support plate (200) is provided with a second connecting hole (210). The connector (1000) passes through the first connecting hole (910) and is connected to the second connecting hole (210) so that the fixing frame (900) and the first support plate (200) are fixedly connected.

3. The folding knife device according to claim 2, characterized in that, The first connecting hole (910) is a strip-shaped hole extending along the height direction. The connector (1000) can be inserted into different positions of the first connecting hole (910) to adjust the position of the fixing frame (900) in the height direction.

4. The folding knife device according to claim 2, characterized in that, The fixing frame (900) is provided with two first through holes spaced apart in the width direction. A bearing (920) is provided in the first through hole. A rotating shaft (930) passes through the bearing (920). The second synchronous wheel (400) is sleeved on the rotating shaft (930) and is located between the two bearings (920).

5. The folding knife device according to any one of claims 2 to 4, characterized in that, The transmission assembly includes: The lifting plate (610) is connected to the clamp (510) via the first connecting plate (660). A fixing plate (620) is fixedly connected to the lifting plate (610), and the fixing plate (620) is provided with a third connecting hole; The fixing rod (630) is fixed after passing through the third connecting hole. The fixing rod (630) includes two connecting parts extending out of the third connecting hole. The two connecting parts are located on both sides of the fixing plate (620). Two fixing bases (640) correspond one-to-one with the folding knife assembly (700), and the two fixing bases (640) are respectively connected to the two folding knife assemblies (700). Two connecting rods (650) correspond one-to-one with the fixed seat (640) and the connecting part. One end of the connecting rod (650) is hinged to the connecting part, and the other end of the connecting rod (650) is hinged to the fixed seat (640).

6. The folding knife device according to claim 5, characterized in that, The lifting plate (610) is provided with a clearance groove (611), which is used to avoid the fixed frame (900).

7. The folding knife device according to claim 5, characterized in that, Each of the folding knife assemblies (700) includes: The second connecting plate (710) is fixedly connected to the fixed base (640); A fixing block (720) is fixedly connected to the second connecting plate (710), and the fixing block (720) is located below the substrate (100); The folding knife (730) is connected to the bottom of the second connecting plate (710).

8. The folding knife device according to claim 7, characterized in that, The first guide component (800) includes: A first guide rail (810) is connected to the side of the substrate (100) facing the fixing block (720), and the first guide rail (810) extends along the width direction; The first slider (820) is connected to the side of the fixed block (720) facing the substrate (100), and the first slider (820) is slidably engaged with the first guide rail (810).

9. The folding knife device according to claim 5, characterized in that, The first support plate (200) is provided with a groove, and a second guide assembly (1100) is provided between the first connecting plate (660) and the bottom surface of the groove. The second guide assembly (1100) includes: The second guide rail (1110) is connected to the bottom surface of the groove and extends along the height direction; The second slider (1120) corresponds one-to-one with the second guide rail (1110). The second slider (1120) is connected to the side of the first connecting plate (660) facing the first support plate (200). The second slider (1120) and the second guide rail (1110) slide together.

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

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