A feeding mechanism for cutting lunch boxes

Abstract

This application relates to a feeding mechanism for cutting lunch boxes, including a base frame, a lifting assembly, and a conveying assembly. The lifting assembly includes a main frame, a lifting frame, several support rods, and a lifting cylinder. A connecting rod is provided on the top surface of the lifting frame, and connecting blocks are provided at the bottom of the several support rods. Support blocks are fixed at both ends of the connecting rods, and several connecting blocks are arranged in a row between two support blocks. It also includes a control assembly for adjusting the spacing between the support rods. The control assembly includes a control plate, several control blocks, a control spring, and a drive structure for sliding the control plate. A main rod is fixed on the control plate, and control inclined surfaces are provided on both sides of the control blocks facing the connecting blocks. The edges of adjacent connecting blocks near the control plate abut against the control inclined surfaces. The control spring is located between the support blocks and the connecting blocks, and the control spring drives the several connecting blocks to clamp the control blocks. This allows for convenient adjustment of the gaps between all support rods at once, making support rod adjustment easy.

Description

Technical Field

[0001] This application relates to the field of lunchbox production technology, and in particular to a feeding mechanism for cutting lunchboxes. Background Technology

[0002] When producing lunch boxes on a production line, the production steps include extruding sheet material, forming the lunch box, and cutting the lunch box. First, the sheet material is extruded through an extruder. Then, the sheet material is transported to a forming mold. After the upper and lower molds are closed, multiple grooves are arranged and pressed into the sheet material. Then, it is transported to a cutting mechanism, where the grooves are cut off individually to form the lunch box body.

[0003] Utility model patent CN218534899U discloses a feeding mechanism for a lunchbox stamping and cutting machine, including a frame and a lifting assembly mounted on the frame that can move plastic sheets up and down. Above the lifting assembly is a movable block assembly for engaging with lunchbox grooves formed on the plastic sheet. The movable block assembly is driven by a drive mechanism to move back and forth along the length of the frame. This utility model has a simple structure, reasonable design, and convenient operation. The lifting assembly raises the sheet, and the movable block assembly engages with the lunchbox groove and moves in the output direction of the frame, thereby conveying the plastic sheet sequentially to the stamping and cutting die, saving time and labor and improving work efficiency.

[0004] Regarding the aforementioned related technologies, when the feeding mechanism of the aforementioned lunch box stamping and cutting machine is used, multiple grooves formed on the sheet are arranged in a row. The grooves are located in the gap between adjacent support rods 107. When different types of lunch boxes are used and the spacing between lunch boxes changes, the spacing of the support rods 107 needs to be adjusted one by one to adapt to the gap between the lunch boxes. However, since there are multiple support rods 107, it is inconvenient to adjust the position of the support rods 107, and it is difficult to adjust the spacing between the support rods 107 to be the same. Summary of the Invention

[0005] To facilitate the adjustment of the spacing between the support rods, this application provides a feeding mechanism for cutting lunch boxes.

[0006] The feeding mechanism for cutting lunch boxes provided in this application adopts the following technical solution:

[0007] A feeding mechanism for cutting lunch boxes includes a base frame, a lifting assembly vertically sliding on the top of the base frame, and a conveying assembly for driving a sheet to slide along the top surface of the base frame. The lifting assembly includes a main frame, a lifting bracket, several support rods, and a lifting cylinder. The main frame is mounted on the base frame, and the lifting bracket is vertically slidably connected to the main frame. A connecting rod is provided on the top surface of the lifting bracket, and connecting blocks are provided at the bottom of the several support rods. The several connecting blocks are slidably connected to the connecting rods. The several support rods are arranged parallel to each other at intervals, and the direction of the gap between the support rods is either away from or close to each other. The direction is close to the cutting mechanism; support blocks are fixed at both ends of the connecting rod, and a plurality of the connecting blocks are arranged in a row between two support blocks, and the support blocks are fixed to the lifting frame; the lifting cylinder drives the lifting frame to rise and fall; it also includes a control component for adjusting the spacing between the support rods, the control component including a control plate, a plurality of control blocks, a control spring and a drive structure for driving the control plate to slide; the control blocks are located one-to-one between two adjacent connecting blocks, a main rod is fixed on the control plate, a plurality of control blocks are slidably arranged on the control plate, and the main rod passes through a plurality of control blocks;

[0008] The control block has control ramps on both sides facing the connecting block. The control ramps on both sides extend in opposite directions toward the control plate. The edge of the control plate on the side of two adjacent connecting blocks that are close to each other abuts the control ramp. The driving structure drives the control plate away from or toward several connecting blocks. The control spring is disposed between the support block and the connecting block. The control spring drives several connecting blocks to clamp the control block.

[0009] By adopting the above technical solution, the connecting block abuts against the inclined surface of the control block. When the control block moves deeper into the gap between the connecting blocks, the two connecting blocks slide away from each other. When the control block slides away from the gap between the connecting blocks, the connecting blocks are driven by the control spring to slide closer to each other. When it is necessary to adjust the distance between the connecting blocks, the drive structure drives the control plate to slide away from or closer to the connecting block, thereby causing several control blocks to simultaneously move away from or closer to the gaps on adjacent connecting blocks. Then, the control spring drives the connecting block to keep abutting against the control block, thus realizing the simultaneous sliding of several connecting blocks. This allows for the simultaneous adjustment of the gap size between all the support rods, and the gap size between the support rods is completely consistent, making the adjustment of the support rod position convenient.

[0010] After the lifting cylinder lifts the lifting frame, the sheet material on the support rod is higher than the cutting groove of the lower die of the cutting mechanism. After the conveying component transports the sheet material closer to the cutting mechanism, the lifting cylinder lowers the sheet material so that the groove on the sheet material is located in the cutting groove of the lower die of the cutting mechanism. The upper die cutter presses down to achieve cutting.

[0011] Optionally, a stabilizing ramp is provided on the side of two adjacent connecting blocks that are close to each other, near the edge of the control panel, and the stabilizing ramp abuts against the control ramp.

[0012] By adopting the above technical solution, the connection block and the control block are stably connected by the stable inclined plane abutting against the control inclined plane.

[0013] Optionally, the drive structure includes a connecting frame, a threaded rod, and a drive motor. The connecting frame is fixedly connected to the control board, and the drive motor is fixed to the main frame. The connecting frame has a threaded hole, and the threaded rod is threaded into the threaded hole. The drive motor drives the threaded rod to rotate, and the length direction of the threaded rod is the same as the sliding direction of the control board.

[0014] By adopting the above technical solution, the threaded rod is driven to rotate by a motor, thereby causing the connecting frame to slide, thus realizing electric adjustment. There is no need for manual adjustment of the control board, which makes it convenient to adjust the gap between the support rods.

[0015] Optionally, it also includes an adjustment assembly for adjusting the position of the main frame on the base frame. The adjustment assembly includes an adjustment handwheel, an adjustment screw, a reduction gearbox, a slide rail, a slider, and an adjustment block. The slide rail is located on the top of the base frame, and the slider is located on the bottom of the main frame. The slider is slidably connected to the slide rail, and the sliding direction of the slider is perpendicular to the length direction of the support rod. The adjustment block is fixed to the main frame. One end of the adjustment screw is rotatably connected to the base frame, and the other end is connected to the output end of the reduction gearbox. The input end of the reduction gearbox is connected to the adjustment handwheel.

[0016] By adopting the above technical solution, the main frame is slidably connected to the top of the base frame. When the gap between the support rods changes, the support rods may not be aligned with the interval between adjacent grooves, thus requiring adjustment of the main frame position to align the support rods with the interval between adjacent grooves, thereby eliminating the need to move the entire feeding mechanism. By setting a reduction gearbox, the rotation speed of the adjusting screw is slowed down, and the fine adjustment of the lifting frame is achieved by rotating the adjusting handwheel.

[0017] Optionally, the conveying assembly includes a sliding plate, a conveying pressure plate, two sets of support parts, and two sets of rodless drive cylinders. The two sets of support parts are fixed on the base frame and are located on both sides of the sheet conveying direction. A plurality of the support rods are located between the two sets of support parts. The two sets of rodless drive cylinders are correspondingly arranged on the two sets of support parts, and the sliding blocks of the two sets of rodless drive cylinders fix the two ends of the sliding plate. The conveying pressure plate is fixed to the bottom of the sliding plate by a fixing rod and is used to extend into the groove on the sheet.

[0018] By adopting the above technical solution, during feeding, the support rod is first lifted, and the sheet on the support rod is higher than the cutting groove of the lower die of the cutting mechanism. At this time, the conveying pressure plate is located in the groove on the sheet. The rodless cylinder drives the sliding plate to slide closer to the cutting mechanism, so that the conveying pressure plate drives the sheet to slide closer to the cutting mechanism. The lifting cylinder then lowers the lifting frame, so that the groove on the sheet is located in the cutting groove of the lower die of the cutting mechanism. After the upper die's cutter presses down, cutting is achieved, thereby realizing automatic feeding.

[0019] Optionally, a mounting bracket is fixed to the two outermost support rods among the plurality of support rods, and a positioning cylinder is fixed to the mounting bracket. The positioning cylinder is used to press the two edges of the sheet against the top surface of the two outermost support rods among the plurality of support rods.

[0020] By adopting the above technical solution, because the conveying platen moves the sheet at a relatively high speed, the sheet becomes unstable due to inertia after detaching from the conveying platen. At the instant the conveying platen detaches from the groove, the positioning cylinder presses the edge of the sheet against the support rod, thus stabilizing the sheet.

[0021] Optionally, the top of the sliding plate is fixed with an installation plate for transporting and installing the pressure plate. The installation plate is provided with a straight groove. The length direction of the straight groove is perpendicular to the length direction of the support rod. The fixing rod passes through the straight groove. A fixing ring is coaxially fixed on the fixing rod. The fixing ring abuts against the bottom surface of the installation plate. A fixing nut is threaded to the top of the fixing rod.

[0022] By adopting the above technical solution, after the gap between the support rods is adjusted, the fixed rod slides in the straight groove, which facilitates the adjustment of the position of the transport pressure plate, so that the transport pressure plate is aligned with the gap between the two support rods.

[0023] Optionally, a pressure rail is fixed on the mounting bracket, the pressure rail is located at the top of the support rod, and the gap between the pressure rail and the top surface of the support rod allows the sheet material to pass through.

[0024] By adopting the above technical solution and setting the pressure rail, the sheet material is placed relatively flat on the support rod, making it less prone to wrinkles.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. By setting up a control plate, control block, control ramp, and control spring, the gap between all the support rods can be adjusted at once, making the adjustment of the support rods convenient;

[0027] 2. By setting up an adjusting handwheel, adjusting screw, reduction gearbox, slide rail, slider and adjusting block, the position of the main frame can be easily adjusted, so that the support rod is aligned with the gap between adjacent grooves on the sheet;

[0028] 3. By setting a fixing rod, fixing ring, nut and straight groove, the position adjustment of the conveying pressure plate is convenient, so that the conveying pressure plate is aligned with the groove on the sheet. Attached Figure Description

[0029] Figure 1 This is an overall schematic diagram of the feeding mechanism and the cutting mechanism for cutting lunch boxes in an embodiment, mainly showing the connection relationship between the feeding mechanism and the cutting mechanism for cutting lunch boxes.

[0030] Figure 2 This is a schematic diagram of the feeding mechanism for cutting lunch boxes in the embodiment. Figure 1 This mainly showcases the state of the sheet material on the support rod.

[0031] Figure 3 This is a schematic diagram of the feeding mechanism for cutting lunch boxes in the embodiment. Figure 2 This mainly showcases the structure of the adjustment components.

[0032] Figure 4 This is a partial schematic diagram of an embodiment. Figure 1 This mainly showcases the structure of the control components.

[0033] Figure 5 This is a partial schematic diagram of an embodiment. Figure 2 This mainly showcases the connection structure of the connecting block and the control block.

[0034] Figure 6 yes Figure 5 The enlarged view at point A mainly shows the structure of the control slope and the stabilizing slope.

[0035] Explanation of reference numerals in the attached drawings: 1. Base frame; 2. Lifting assembly; 21. Main frame; 22. Lifting frame; 221. Lifting plate; 222. Guide rod; 223. Guide hole; 23. Support rod; 24. Lifting cylinder; 25. Connecting rod; 26. Support block; 27. Connecting block; 271. Stabilizing ramp; 3. Transport assembly; 31. Sliding plate; 32. Transport pressure plate; 33. Support part; 331. Mounting slot; 34. Drive rodless cylinder; 35. Mounting plate; 351. Straight slot; 36. Fixing rod; 361. Fixing ring; 362. Fixing nut; 4. Sheet; 41. Groove; 5. Cutting mechanism; 51. Groove; 6. Adjusting component; 61. Adjusting handwheel; 62. Adjusting lead screw; 63. Reduction gearbox; 64. Slide rail; 65. Slider; 66. Adjusting block; 7. Control component; 71. Control board; 711. Connecting groove; 712. Main rod; 72. Control block; 721. Control inclined plane; 73. Control spring; 74. Drive structure; 741. Connecting frame; 742. Threaded rod; 743. Connecting column; 744. Drive motor; 745. Threaded hole; 8. Mounting bracket; 81. Positioning cylinder; 9. Pressure rail. Detailed Implementation

[0036] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0037] This application discloses a feeding mechanism for cutting lunch boxes. (Refer to...) Figure 1 , Figure 2 The feeding mechanism for cutting lunch boxes includes a base frame 1, a lifting assembly 2 vertically sliding on the top of the base frame 1, and a conveying assembly 3 that drives the sheet 4 to slide along the top surface of the base frame 1. The lifting assembly 2 lifts the bottom height of the groove 41 on the sheet 4 to a height higher than the cutting groove 51 of the lower die of the cutting mechanism 5. The moving assembly feeds the sheet 4 closer to the cutting mechanism 5. The lifting assembly 2 then lowers the sheet 4 so that the groove 41 is located in the cutting groove 51.

[0038] Reference Figure 2 , Figure 3 The lifting assembly 2 includes a main frame 21, a lifting bracket 22, several support rods 23, and a lifting cylinder 24. The main frame 21 is slidably connected to the base frame 1. The feeding mechanism for cutting the lunch box also includes an adjusting assembly 6 for adjusting the position of the main frame 21 on the base frame 1. The adjusting assembly 6 includes an adjusting handwheel 61, an adjusting screw 62, a reduction gearbox 63, a slide rail 64, a slider 65, and an adjusting block 66. The slide rail 64 is fixed to the top of the base frame 1, and the slider 65 is fixed to the bottom of the main frame 21. The slider 65 is slidably connected to the slide rail 64, and the sliding direction of the slider 65 is perpendicular to the conveying direction of the sheet 4.

[0039] Reference Figure 3 The adjusting block 66 is fixed on the main frame 21. One end of the adjusting screw 62 is rotatably connected to the base frame 1, and the other end is connected to the output end of the reduction gearbox 63. The input end of the reduction gearbox 63 is connected to the adjusting handwheel 61. The reduction gearbox 63 is fixed on the base frame 1.

[0040] Reference Figure 2 The lifting frame 22 is vertically slidably connected to the main frame 21. The lifting frame 22 includes two lifting plates 221. Four vertical guide rods 222 are fixed to the top of the main rod 712. Guide holes 223 are provided at both ends of the lifting plates 221 for the guide rods 222 to pass through and slide. Two lifting cylinders 24 are provided, with the output shafts of the lifting cylinders 24 facing upwards. The output shafts of the lifting cylinders 24 are fixed to the bottom surfaces of the two lifting plates 221 respectively. A base plate (not shown in the figure) is placed at the bottom of the lifting cylinder 24 for the bottom of the lifting cylinder 24 to be placed. When the lifting cylinder 24 drives the lifting plate 221 to slide, the bottom of the lifting cylinder 24 abuts against the base plate, and the top of the lifting cylinder 24 drives the lifting plate 221 to slide vertically.

[0041] Reference Figure 1 Several support rods 23 are arranged parallel to each other at intervals, and the direction of the gap between the support rods 23 is away from or close to the cutting mechanism 5.

[0042] Reference Figure 4 , Figure 5 A connecting rod 25 is fixed to the top surface of the lifting plate 221, and support blocks 26 are fixed to both ends of the connecting rod 25. The support blocks 26 are fixed to the top surface of the lifting plate 221. Several support rods 23 have two connecting blocks 27 fixed to their bottoms. Several connecting blocks 27 are arranged in a row between two support blocks 26. The connecting rod 25 passes through the row of connecting blocks 27, and the two connecting blocks 27 are slidably connected to the connecting rod 25 on the two lifting plates 221.

[0043] Reference Figure 3 , Figure 4 The feeding mechanism for cutting lunch boxes also includes a control component 7 for adjusting the spacing between the support rods 23. The control component 7 includes two control plates 71, several control blocks 72, two control springs 73, and a drive structure 74.

[0044] Reference Figure 4 , Figure 5 The control blocks 72 are located one-to-one between two adjacent connecting blocks 27. A connecting groove 711 is provided on the top surface of the control plate 71. A main rod 712 is fixed in the connecting groove 711. The bottom ends of several control blocks 72 are slidably connected in the connecting groove 711. The main rod 712 passes through several control blocks 72, so that the control blocks 72 can slide in the connecting groove 711. The sliding direction of the control blocks 72 is the same as the sliding direction of the connecting blocks 27.

[0045] Reference Figure 6 The control block 72 has control ramps 721 on both sides facing the connecting block 27. The control ramps 721 on both sides of the control block 72 extend in opposite directions and towards the control plate 71. The edge of the control plate 71 on the side of the two adjacent connecting blocks 27 that is close to each other abuts the control ramp 721.

[0046] Reference Figure 3 , Figure 4 The drive structure 74 drives the control plate 71 to slide vertically, thereby moving the control block 72 away from or closer to the gap between the connecting blocks 27. The drive structure 74 includes a connecting frame 741, a threaded rod 742, a connecting column 743, and a drive motor 744. The connecting frame 741 is fixedly connected to the bottom surfaces of the two control plates 71 through the connecting column 743. The drive motor 744 is fixed on the main frame 21 and is located below the supporting rods 23. The connecting frame 741 has a threaded hole 745, and the threaded rod 742 is threaded into the threaded hole 745. The motor shaft of the drive motor 744 is coaxially fixed to the threaded rod 742 and drives the threaded rod 742 to rotate. The length direction of the threaded rod 742 is vertical.

[0047] Reference Figure 5The control spring 73 is sleeved on the connecting rod 25. The control spring 73 is located between the support block 26 and the connecting block 27. The control spring 73 drives several connecting blocks 27 to clamp the control block 72, thereby making the connecting block 27 and the control block 72 tightly abut together.

[0048] Reference Figure 6 A stabilizing ramp 271 is provided on the side of the two adjacent connecting blocks 27 that are close to each other, near the edge of the control plate 71. The stabilizing ramp 271 abuts against the control ramp 721, so that the control block 72 and the connecting block 27 are in stable contact.

[0049] Reference Figure 2 The conveying assembly 3 includes a sliding plate 31, a conveying pressure plate 32, two sets of support parts 33, and two sets of rodless drive cylinders 34. The two sets of support parts 33 are fixed to both sides of the base frame 1 and are located on both sides of the conveying direction of the sheet 4. Several support rods 23 are located between the two sets of support parts 33. A mounting groove 331 is provided on the opposite side of the two sets of support parts 33. The two sets of rodless drive cylinders 34 are fixed in the mounting groove 331 one by one. The sliding blocks of the two sets of rodless drive cylinders 34 fix the two ends of the sliding plate 31. The sliding direction of the sliding plate 31 is the same as the moving direction of the sheet 4.

[0050] Reference Figure 2 The conveying pressure plate 32 is fixed to the bottom of the sliding plate 31 by the fixing rod 36. There are two conveying pressure plates 32. The arrangement direction of the two conveying pressure plates 32 is perpendicular to the conveying direction of the sheet 4. The conveying pressure plate 32 is used to extend into the groove 41 on the sheet 4.

[0051] Reference Figure 2 A mounting plate 35 is fixed to the top of the sliding plate 31. Two straight slots 351 are opened through the top surfaces of both ends of the mounting plate 35. The length direction of the straight slots 351 is perpendicular to the length direction of the support rod 23. The conveying pressure plate 32 is fixed to the bottom end of the fixing rod 36. The fixing rod 36 passes through the straight slots 351. A fixing ring 361 is coaxially fixed on the fixing rod 36. The fixing ring 361 abuts against the bottom surface of the mounting plate 35. A fixing nut 362 is threaded to the top of the fixing rod 36. After the fixing nut 362 is tightened, the fixing rod 36 is clamped and fixed by the fixing nut 362 and the fixing ring 361.

[0052] Reference Figure 2 A mounting bracket 8 is fixed on the two outermost support rods 23 among the several support rods 23. A positioning cylinder 81 is fixed on the mounting bracket 8. The positioning cylinder 81 is used to press the two sides of the sheet 4 against the top surface of the two outermost support rods 23 among the several support rods 23.

[0053] Reference Figure 2A pressure rail 9 is fixed on the mounting bracket 8. The pressure rail 9 is located on the top of the support rod 23. The gap between the pressure rail 9 and the top surface of the support rod 23 allows the sheet 4 to pass through. The gap between the pressure rail 9 and the top surface of the support rod is 5-10mm.

[0054] The implementation principle of the feeding mechanism for cutting lunch boxes according to an embodiment of this application is as follows: When the sheet 4 is transported, the sheet 4 is placed on the support rod 23, and the support rod 23 is located in the gap between adjacent grooves 41. The lifting cylinder 24 pushes the lifting frame 22 upward, so that the support rod 23 is lifted first. The groove 41 of the sheet 4 on the support rod 23 is higher than the cutting groove 51 of the lower die of the cutting mechanism 5. At this time, the conveying pressure plate 32 is located in the groove 41 on the sheet 4, and the rodless cylinder drives the sliding plate 3 1. Slide the sheet material 4 closer to the cutting mechanism 5, so that the conveying pressure plate 32 drives the sheet material 4 to slide closer to the cutting mechanism 5; then the lifting cylinder 24 lowers the lifting frame 22. When the conveying pressure plate 32 is disengaged from the groove 41, the positioning cylinder 81 presses the sheet material 4 onto the top surface of the support rod 23. When the support rod 23 is completely lowered, the groove 41 on the sheet material 4 is located in the cutting groove 51 of the lower die of the cutting mechanism 5. The upper die cutter presses down to achieve cutting, thereby realizing automatic feeding.

[0055] When it is necessary to adjust the gap between the support rods 23, the drive motor 744 drives the threaded rod 742 to rotate, causing the connecting frame 741 to move the two control plates 71 up and down, so that the control block 72 moves away from or closer to the gap between the adjacent connecting blocks 27. Due to the control spring 73, the connecting block 27 remains in contact with the control block 72. Due to the action of the control inclined surface 721, when the control block 72 moves deeper into the gap between the connecting blocks 27, the two connecting blocks 27 slide away from each other, and the gap between the support rods 23 increases; when the control block 72 slides away from the gap between the connecting blocks 27, the connecting blocks 27 are driven to slide closer to each other by the control spring 73, and the gap between the support rods 23 decreases.

[0056] When the position of the main frame 21 needs to be adjusted, the worker can turn the adjusting handwheel 61 by hand, which will cause the reduction gearbox 63 to drive the lead screw to rotate, thereby moving the main frame 21 in a direction perpendicular to the conveying direction of the sheet 4, thus achieving the adjustment.

[0057] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A feeding mechanism for cutting lunch boxes, comprising a base frame (1), a lifting assembly (2) vertically slidably disposed on the top of the base frame (1), and a conveying assembly (3) for driving a sheet (4) to slide along the top surface of the base frame (1), wherein the lifting assembly (2) comprises a main frame (21), a lifting frame (22), a plurality of support rods (23), and a lifting cylinder (24); the main frame (21) is disposed on the base frame (1), and the lifting frame (22) is vertically slidably connected to the main frame (21); a connecting rod (25) is disposed on the top surface of the lifting frame (22), and a plurality of the support rods (23) are provided. A connecting block (27) is provided at the bottom, and several connecting blocks (27) are slidably connected to a connecting rod (25). Several support rods (23) are arranged parallel to each other at intervals, and the extension direction of the gap between the support rods (23) is away from or close to the cutting mechanism (5). Support blocks (26) are fixed at both ends of the connecting rod (25), and several connecting blocks (27) are arranged in a row between two support blocks (26). The support blocks (26) are fixed to the lifting frame (22). The lifting cylinder (24) drives the lifting frame (22) to rise and fall. The feature is that: It also includes a control assembly (7) for adjusting the spacing of the support rods (23). The control assembly (7) includes a control plate (71), a plurality of control blocks (72), a control spring (73), and a drive structure (74) for driving the control plate (71) to slide. The control blocks (72) are located one-to-one between two adjacent connecting blocks (27). A main rod (712) is fixed on the control plate (71). The plurality of control blocks (72) are slidably disposed on the control plate (71). The main rod (712) passes through the plurality of control blocks (72). The control block (72) has control ramps (721) on both sides facing the connecting block (27). The control ramps (721) on both sides extend in opposite directions toward the control plate (71). The edge of the control plate (71) on the side of two adjacent connecting blocks (27) that is close to each other abuts the control ramp (721). The drive structure (74) drives the control plate (71) away from or closer to several connecting blocks (27). The control spring (73) is disposed between the support block (26) and the connecting block (27). The control spring (73) drives several connecting blocks (27) to clamp the control block (72). The drive structure (74) includes a connecting frame (741), a threaded rod (742), and a drive motor (744). The connecting frame (741) is fixedly connected to the control board (71), and the drive motor (744) is fixed on the main frame (21). The connecting frame (741) has a threaded hole (745), and the threaded rod (742) is threaded into the threaded hole (745). The drive motor (744) drives the threaded rod (742) to rotate. The length direction of the threaded rod (742) is the same as the sliding direction of the control board (71).

2. The feeding mechanism for cutting lunch boxes according to claim 1, characterized in that: A stabilizing ramp (271) is provided on the side of the two adjacent connecting blocks (27) that are close to each other, near the edge of the control plate (71). The stabilizing ramp (271) has the same inclination angle as the control ramp (721), and the stabilizing ramp (271) abuts against the control ramp (721).

3. The feeding mechanism for cutting lunch boxes according to claim 1, characterized in that: It also includes an adjustment assembly (6) for adjusting the position of the main frame (21) on the base frame (1). The adjustment assembly (6) includes an adjustment handwheel (61), an adjustment screw (62), a reduction gearbox (63), a slide rail (64), a slider (65), and an adjustment block (66). The slide rail (64) is located on the top of the base frame (1), and the slider (65) is located on the bottom of the main frame (21). The slider (65) is slidably connected to the slide rail (64), and the sliding direction of the slider (65) is perpendicular to the length direction of the support rod (23). The adjustment block (66) is fixed on the main frame (21). One end of the adjustment screw (62) is rotatably connected to the base frame (1), and the other end is connected to the output end of the reduction gearbox (63). The input end of the reduction gearbox (63) is connected to the adjustment handwheel (61).

4. The feeding mechanism for cutting lunch boxes according to claim 1, characterized in that: The conveying assembly (3) includes a sliding plate (31), a conveying pressure plate (32), two sets of support parts (33), and two sets of drive rodless cylinders (34). The two sets of support parts (33) are fixed on the base frame (1) and are located on both sides of the conveying direction of the sheet (4). Several of the support rods (23) are located between the two sets of support parts (33). The two sets of drive rodless cylinders (34) are arranged one-to-one on the two sets of support parts (33). The sliding blocks of the two sets of drive rodless cylinders (34) fix the two ends of the sliding plate (31). The conveying pressure plate (32) is fixed to the bottom of the sliding plate (31) by a fixing rod (36). The conveying pressure plate (32) is used to extend into the groove (41) on the sheet (4).

5. The feeding mechanism for cutting lunch boxes according to claim 4, characterized in that: Mounting brackets (8) are fixed on the two outermost support rods (23) among the plurality of support rods (23), and positioning cylinders (81) are fixed on the mounting brackets (8). The positioning cylinders (81) are used to press the two sides of the sheet (4) against the top surface of the two outermost support rods (23) among the plurality of support rods (23).

6. The feeding mechanism for cutting lunch boxes according to claim 4, characterized in that: The top of the sliding plate (31) is fixed with an mounting plate (35) for mounting the conveying pressure plate (32). The mounting plate (35) is provided with a straight groove (351). The length direction of the straight groove (351) is perpendicular to the length direction of the support rod (23). The fixing rod (36) passes through the straight groove (351). A fixing ring (361) is coaxially fixed on the fixing rod (36). The fixing ring (361) abuts against the bottom surface of the mounting plate (35). The top end of the fixing rod (36) is threaded with a fixing nut (362).

7. The feeding mechanism for cutting lunch boxes according to claim 5, characterized in that: A pressure rail (9) is fixed on the mounting bracket (8). The pressure rail (9) is located on the top of the support rod (23). The gap between the pressure rail (9) and the top surface of the support rod (23) allows the sheet material (4) to pass through.

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