Feeding machine for corrugated paper carton production

Abstract

The feeding machine for corrugated paper carton production comprises a rack and side baffles, at least one front baffle is fixed to the surface of a supporting cross rod between the side baffles, and a conveying assembly for feeding paper is arranged on the portion, below the supporting cross rod, of the rack; a position detection assembly is arranged on the front baffle and comprises a plurality of stacked detection parts, the paperboards push the detection parts to operate, the pushed detection parts display whether the stacked paperboards fully abut against the surface of the front baffle or not, and the position of a positioning unit is calibrated through a calibration assembly. And whether the stacked paperboards fully abut against the front baffle or not is determined in a visual mode. According to the technical scheme, synchronous detection on whether the stacked paperboards fully abut against the front baffle or not can be achieved, the detection result can be presented in a visual mode, one-by-one probing or manual touch by operators is not needed, and therefore the feeding efficiency is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of corrugated cardboard box production, specifically to a feeding machine for corrugated cardboard box production. Background Technology

[0002] In the production of corrugated boxes, the conveying and feeding of cardboard is a crucial step. Corrugated cardboard is typically formed by pressing multiple layers of cardboard together, resulting in variations in thickness, size, and flexibility. On the production line, the cardboard needs to be transported from the storage area to processing equipment such as die-cutting machines, printing machines, or gluing machines. Ensuring accurate placement of the cardboard is a prerequisite for subsequent processing precision and production efficiency.

[0003] In existing technologies, cardboard feeding typically relies on manual labor or simple mechanical feeding mechanisms for positioning, resulting in low operational efficiency and issues such as cardboard not fully contacting the front baffle or inaccurate positioning. For example, Chinese patent document ZL202211110644.7 (title: A high-precision servo conveying and dust-removing paper feeder) discloses a high-precision conveying device for single cardboard sheets, which can accurately convey cardboard from the storage location to processing equipment such as die-cutting machines or printing machines. This type of technology has high precision when conveying single sheets of cardboard, but it still has shortcomings in feeding multi-layer stacked cardboard while ensuring that each layer of cardboard is in place.

[0004] In scenarios involving multi-layer cardboard stacking, due to differences in cardboard thickness and size, some cardboard may not fully contact the front baffle during the feeding process. Traditional manual inspection or simple mechanical detection methods cannot simultaneously determine the positioning status of multiple layers of cardboard. Operators need to frequently check whether the cardboard is in contact with the front baffle, resulting in low feeding efficiency and operational safety risks.

[0005] Therefore, there is an urgent need in the existing technology for a feeding technology solution for corrugated cardboard box production that can solve the above problems. Summary of the Invention

[0006] In view of the technical problems existing in the prior art, the present invention aims to provide a corrugated cardboard box production feeder that can solve the technical problems of some cardboard not fully touching the front baffle during the feeding process of multi-layer stacked cardboard, the inability of traditional manual or simple mechanical detection to simultaneously judge the positioning status, and the low feeding efficiency and insufficient operational safety of the feeder for corrugated cardboard box production.

[0007] Specifically, the present invention solves the above-mentioned technical problems through the following technical solutions: According to one aspect of the present invention, a feeding machine for corrugated cardboard box production is provided, characterized in that it includes a frame, two symmetrically arranged support arms are fixed on the frame, a support crossbar is fixed between the two support arms, two symmetrically arranged side baffles are fixed on the surface of the support crossbar, at least one front baffle is fixed on the surface of the support crossbar between the two side baffles, and a paper feeding conveying assembly is provided on the frame below the support crossbar. A position detection component is provided on the front baffle. The position detection component includes multiple stacked detection units. The cardboard pushes the detection units to run. The pushed detection units show whether the stacked cardboard is sufficiently against the surface of the front baffle. The position of the positioning unit is calibrated by the calibration component to visually determine whether the stacked cardboard is sufficiently against the front baffle.

[0008] The detection unit uses multiple stacked cardboard units to check whether the cardboard in the same stack is sufficiently against the surface of the front baffle. The detection results are displayed through the calibration component, which visually determines whether the stacked cardboard is sufficiently against the front baffle. This avoids the need for the loading personnel to repeatedly probe to see if all the cardboard is against the front baffle.

[0009] In this technical solution, the detection unit includes a detection unit, a transmission unit, and a positioning unit. The detection unit abuts against the cardboard, and the cardboard pushes the detection unit to move. The detection unit drives the positioning unit to move through the transmission unit. The position of the positioning unit is calibrated by a calibration component to detect whether the stacked cardboard is sufficiently against the front baffle.

[0010] In this technical solution, a mounting slot is provided on the front baffle, and the stacked detection units cover the mounting slot. The detection units are set on the mounting slot, and the detection unit includes a slender drive cross plate. The drive cross plate is set on the side of the front baffle close to the cardboard and protrudes from the surface of the front baffle. Multiple drive cross rods are fixed on the outer wall of the drive cross plate away from the cardboard. The drive cross rods are slidably connected to the front baffle, and at least one drive cross rod is sleeved with a spring. One end of one drive cross rod is connected to the transmission unit, and the positioning unit moves synchronously through the transmission unit.

[0011] The elastic force provided by the spring causes the drive plate to protrude from the outer wall of the front baffle when no external force is applied.

[0012] The multiple drive plates on the detection unit are arranged in a vertically stacked manner, with adjacent drive plates overlapping each other. Through this stacking structure, the drive plates can cover the mounting slot and can enter the mounting slot during operation.

[0013] The top of the placement rack protrudes towards one side of the front baffle, and the bottom of the front baffle has an inclined groove to form an inclined surface. When the cardboard reaches the front baffle, the corresponding side of the cardboard located at the bottom and overlapping the conveyor roller contacts the inclined surface, and the other side of the cardboard that overlaps with the placement rack slides down from the protrusion, forming an orderly paper feeding and loading.

[0014] In this technical solution, the positioning unit includes a driven crossbar, which is fixed to the end of the transmission rod and is arranged parallel to the driving crossbar. A positioning element is fixed to the end of the driven crossbar.

[0015] A third guide sleeve is fitted onto the surface of the driven crossbar, and the driven crossbar slides inside the third guide sleeve.

[0016] The second and third guide sleeves are fixed in the same way as the first guide sleeve. The second and third guide sleeves at the bottom are fixed to the front baffle by connecting rods and fixing rods, respectively.

[0017] In this technical solution, the positioning component includes a positioning block, the central part of which has a positioning through hole, and the top and bottom sidewalls of the positioning block are recessed towards the center to form a diffraction surface.

[0018] The positioning block is preferably cylindrical. Since the top and bottom sidewalls of the positioning block are concave inward, an annular raised skirt is formed at the edge of the positioning block.

[0019] In this technical solution, the calibration component includes a calibration element and a display plate. Both the calibration element and the display plate are fixed on the front baffle. The calibration element emits a vertical beam of light, which illuminates the display plate at the bottom of the detection component.

[0020] In this technical solution, the conveying assembly includes multiple parallel paper feeding shafts, which are located in the hollow part of the frame and at the bottom of the support crossbar. Multiple paper feeding rollers are sleeved on the surface of the paper feeding shafts. One end of the paper feeding shaft is mounted on the frame through a bearing, and the other end is mounted on the power box.

[0021] The power box is equipped with at least one servo motor. The output end of the servo motor is connected to the end of one of the paper feeding shafts. The ends of the other adjacent paper feeding shafts are connected by a transmission belt or chain, thereby realizing the linkage drive of each paper feeding shaft.

[0022] The technical solution of this invention enables simultaneous detection of whether stacked cardboard is fully against the front baffle, and the detection results can be presented in a visual manner, eliminating the need for operators to inspect or touch each cardboard individually, thereby effectively improving feeding efficiency.

[0023] Compared with the prior art, the present invention has at least the following beneficial effects: By combining multi-layer synchronous detection with visual display, the system achieves accurate judgment of the cardboard's positioning status, improving detection reliability. Utilizing the coordinated design of the drive plate, positioning block, and beam aperture, the beam scatters or changes color when the cardboard is not in position, allowing for rapid identification of anomalies. Frequent manual inspections are eliminated, reducing operational risks and enhancing operational safety. Detection results can be displayed or recorded in real time, facilitating production management and automated control, and improving the controllability of the production process. The simplified structure of the stacked drive plate and light-transmitting positioning block combines mechanical guidance and detection functions, ensuring structural reliability and ease of maintenance. Combined with existing visual detection technology, it can adapt to high-speed, multi-station automated feeding scenarios, meeting the industrial production requirements for the accuracy and stability of cardboard feeding. Attached Figure Description

[0024] Figure 1 This is a schematic diagram illustrating the overall structure of a feeding machine for corrugated cardboard box production according to an embodiment of the present invention; Figure 2 This is a bottom view of a feeder for corrugated cardboard box production according to an embodiment of the present invention. Figure 3 This is a schematic diagram illustrating the structure of the detection component, front baffle, and conveying component of a feeder for corrugated cardboard box production according to an embodiment of the present invention. Figure 4 This is a schematic diagram of the detection component, front baffle, and conveying component of a feeder for corrugated cardboard box production according to an embodiment of the present invention from another perspective. Figure 5 This is a cross-sectional view of the detection section of a feeder for corrugated cardboard box production according to an embodiment of the present invention; Figure 6 for Figure 5 A structural diagram from another perspective; Figure 7 for Figure 5 A schematic diagram of the structure of a single front baffle; Figure 8 for Figure 7 A structural diagram from another perspective; Figure 9 To show Figure 7 A schematic diagram of the connection structure of a single detection unit on the front baffle; Figure 10 This is a schematic cross-sectional view of the positioning component of a feeder for corrugated cardboard box production according to an embodiment of the present invention. Figure 11 for Figure 7 A schematic diagram of the detection section after shortening the distance between the drive cross plate and the front baffle.

[0025] Explanation of reference numerals in the attached figures 1. Rack; 2. Support arm; 21. Support crossbar; 3. Side baffles; 4. Front baffle; 41. Mounting through slot; 42. Angled slot; 5. Detection section; 51. Detection unit; 511. Drive cross plate; 512. Drive cross bar; 513. First guide sleeve; 52. Transmission rod; 521. Second guide sleeve; 522. Connecting rod; 53. Positioning unit; 531. Driven cross bar; 532. Third guide sleeve; 533. Positioning component; 5331. Positioning block; 5332. Diffraction surface; 5333. Positioning through hole; 534. Fixing rod; 6. Conveying assembly; 61. Paper feed shaft; 62. Paper feed roller; 63. Power unit; 7. Guide plate; 8. Shelf; 9. Calibration assembly; 91. Calibration piece; 911. First connecting rod; 92. Display plate; 921. Second connecting rod. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, this description is exemplary and does not limit the present invention to the embodiments described herein.

[0027] like Figures 1-4 As shown, the corrugated cardboard box production feeder in this embodiment of the invention includes a frame 1. Two symmetrically arranged support arms 2 are fixed on the frame 1. A support crossbar 21 is fixed between the two support arms 2. Two symmetrically arranged side baffles 3 are fixed on the surface of the support crossbar 21. At least one front baffle 4 is fixed on the surface of the support crossbar 21 between the two side baffles 3. A paper feeding conveying assembly 6 is arranged on the frame 1 below the support crossbar 21. A position detection assembly is arranged on the front baffle 4. The position detection assembly includes multiple stacked detection units 5. The cardboard pushes the detection units 5 to run. The pushed detection units 5 indicate whether the stacked cardboard is sufficiently against the surface of the front baffle 4. The position of the positioning unit 53 is calibrated by the light beam emitted by the calibration assembly 9, and the stacked cardboard is visually determined to be sufficiently against the front baffle 4.

[0028] The detection unit 5 includes a detection unit 51, a transmission unit, and a positioning unit 53. The detection unit 51 abuts against the cardboard, and the cardboard pushes the detection unit 51 to move. The detection unit 51 drives the positioning unit 53 to move through the transmission unit. The position of the positioning unit 53 is calibrated by the calibration component 9 to detect whether the stacked cardboard is sufficiently against the front baffle 4.

[0029] like Figure 7 - 9、 Figure 11As shown, a mounting slot 41 is provided on the front baffle 4. Stacked detection units 5 cover the mounting slot 41. The detection units 5 are positioned on the mounting slot 41. The detection unit 51 includes a slender drive cross plate 511, which is located on the side of the front baffle 4 closest to the cardboard and protrudes from the surface of the front baffle 4. Multiple drive cross rods 512 are fixed to the outer wall of the drive cross plate 41 on the side furthest from the cardboard. The drive cross rods 512 are slidably connected to the front baffle 4, and at least one drive cross rod 512 is fitted with a spring. One end of one drive cross rod 512 is connected to a transmission unit, which drives the positioning unit 53 to move synchronously. The spring force causes the drive cross plate 511 to protrude from the outer wall of the front baffle 4 when no external force is applied. The multiple drive cross plates 511 on the detection unit 51 are arranged in a vertically stacked manner, with adjacent drive cross plates 511 overlapping each other. Through the aforementioned stacking structure, the drive plate 511 can cover the mounting slot 41 and can enter the mounting slot 41 during operation.

[0030] Specifically, a first guide sleeve 513 is sleeved on the outer surface of the drive crossbar 512. The drive crossbar 512 can slide inside the first guide sleeve 513 in a predetermined direction, and the sliding direction is perpendicular to the front baffle 4. The first guide sleeve 513 can be fixedly installed on the front baffle 4, or fixedly installed on another first guide sleeve 513 arranged vertically adjacent to it.

[0031] Preferably, the first guide sleeve 513 on the bottommost detection unit 51 is directly fixed to the front baffle 4, and the first guide sleeves 513 on each of the remaining detection units 51 are sequentially fixed to the adjacent first guide sleeves 513 below them, thereby forming a vertically stacked guide and support structure. The two ends of the spring are respectively fixedly connected to the drive crossbar 512 and the corresponding first guide sleeve 513 to provide a reset function after the drive crossbar 512 is displaced by force.

[0032] The width of the drive plate 511 is preferably set to be close to the thickness of a single cardboard, or less than the sum of the thicknesses of two cardboards. The smaller the width of the drive plate 511, the higher the accuracy of distinguishing the cardboard's position; however, to avoid increasing the structural complexity due to the drive plate 511 being too narrow, considering both detection accuracy and structural reliability, the width of the drive plate 511 is preferably close to the thickness of a single cardboard.

[0033] The transmission unit includes a transmission rod 52, which is also slidably connected to the front baffle 4. One end of the transmission rod 52 is fixed to the end of the drive crossbar 512, and the other end is fixed to the positioning unit 53.

[0034] Specifically, the transmission rod 52 has a "C" shaped structure, that is, the two ends of the transmission rod 52 are respectively collinear with the driving crossbar 512 and the driven crossbar 531, and the middle part is perpendicular to the driving crossbar 512 and the driven crossbar 531.

[0035] The end surface of the transmission rod 52 that connects to the drive crossbar 512 is fitted with a second guide sleeve 521, and the transmission rod 52 slides under the limitation of the second guide sleeve 521.

[0036] During loading, three sides of the stacked cardboard rest against the front baffle 4 and two side plates respectively, while the other side overlaps the placement rack 8, which is mounted on the frame 1.

[0037] During the feeding process, the stacked cardboard is first placed on the placement rack 8, so that it is between the two side baffles 3. Then, the cardboard is pushed towards the front baffle 4. The cardboard first contacts the drive horizontal plate 511, thereby pushing the drive horizontal plate 511 to move. The drive horizontal bar 512 on the drive horizontal plate 511 slides inside the first guide sleeve 513. The drive horizontal bar 512 drives the positioning member 533 to move synchronously through the transmission rod 52 and the driven horizontal bar 531.

[0038] During the process described above, the spring is compressed, accumulating elastic potential energy to reset the drive plate 511. The elastic potential energy accumulated by the spring cannot move a single piece of cardboard because the cardboard used to make the corrugated box has its own weight.

[0039] The top of the placement rack 8 protrudes towards one side of the front baffle 4. The bottom of the front baffle 4 is provided with an inclined groove 42, thereby forming an inclined surface. When the cardboard reaches the front baffle 4, the corresponding side of the cardboard located at the bottom and overlapping the conveyor roller contacts the inclined surface, and the other side of the cardboard that overlaps with the placement rack 8 slides down from the protrusion, forming an orderly paper feeding and loading.

[0040] The positioning unit 53 includes a driven crossbar 531, which is fixed to the end of the transmission rod 52 and is arranged parallel to the drive crossbar 512. A positioning member 533 is fixed to the end of the driven crossbar 531.

[0041] A third guide sleeve 532 is sleeved on the surface of the driven crossbar 531, and the driven crossbar 531 is slidably connected inside the third guide sleeve 532.

[0042] The second guide sleeve 521 and the third guide sleeve 532 are fixed in the same way as the first guide sleeve 513. The second guide sleeve 521 and the third guide sleeve 532, located at the bottom, are fixed to the front baffle 4 by the connecting rod 522 and the fixing rod 534, respectively.

[0043] Other second guide sleeves 521 and third guide sleeves 532 are fixed on the second guide sleeves 521 and third guide sleeves 532 that are vertically adjacent to them.

[0044] The adjacent first guide sleeve 513, second guide sleeve 521 and third guide sleeve 532 are connected by plates or rods.

[0045] Preferably, in order to reduce the space occupied by the detection component, the distance between the drive cross plate 511 and the front baffle 4 can be shortened, and the lengths of the drive cross bar 512 and the transmission cross bar can be shortened, making the entire detection component more "flat". Figure 11 The diagram shows the structure of the detection unit 5 after shortening the distance between the drive cross plate 511 and the front baffle 4. In order to show the entire detection assembly, the distance between the drive cross plate 511 and the front baffle 4 has been increased, and the lengths of the drive cross bar 512 and the transmission cross bar have also been increased.

[0046] Specifically, such as Figure 10 As shown, the positioning element 533 includes a positioning block 5331. A positioning through hole 5333 is formed in the central part of the positioning block 5331. The top and bottom sidewalls of the positioning block 5331 are recessed towards the center to form a diffraction surface 5332. The positioning block 5331 is preferably cylindrical. Since the top and bottom sidewalls of the positioning block 5331 are recessed inward, an annular raised skirt is formed at the edge of the positioning block 5331.

[0047] After the positioning block 5331 is recessed inward, the distance between the two diffraction surfaces 5332 formed can be appropriately reduced, that is, the depth of the inward recess can be large enough, and the spacing between the two diffraction surfaces 5332 is preferably 3mm-6mm. Figure 10 The relatively large spacing between the two diffraction surfaces 5332 shown is for ease of display. Preferably, the two adjacent positioning blocks 5331 overlap each other.

[0048] The aforementioned overlapping refers specifically to the overlapping of the raised skirts on the positioning blocks 5331. Through the overlapping of the raised skirts, all the positioning blocks 5331, after being in their corresponding positions, form a tubular structure, which facilitates the identification of abnormal areas.

[0049] The following provides a detailed description of the detection components, calibration components, and so on. Figure 5 , Figure 6 and Figure 7 As shown, the calibration component 9 includes a calibration element 91 and a display plate 12. Both the calibration element 91 and the display plate 12 are fixed on the front baffle 4. The calibration element 91 emits a vertical beam of light, which shines onto the display plate 12 at the bottom of the detection component.

[0050] Preferably, the calibration component 91 is made of the following mature and highly engineered devices: industrial point light sources or line light sources (LED light sources), because they have simple structure, long lifespan, and high stability, and are suitable for continuous emission; laser emitters (semiconductor lasers), because they have strong beam directionality and small divergence angle, and are suitable for through-hole alignment detection, with clear alignment judgment boundaries; photoelectric through-beam or collimated beam modules, because they constrain the emission and reception paths, making it easy to form a clear judgment of "whether or not through-hole is passed".

[0051] Preferably, the positioning block 5331 is made of a transparent material, including but not limited to one of PC (polycarbonate) transparent or translucent material and PMMA (acrylic) material.

[0052] Preferably, the diffraction surface 5332 is coated with a light-transmitting coating of a color different from the color of the light beam emitted by the calibration component 9.

[0053] Specifically, the preferred beam color is either red or blue; red light has strong penetrating power and less background interference, and is mature in industrial applications, while blue light is more sensitive to color changes and scattering, making it suitable for fine marking.

[0054] Furthermore, when a red light beam is used, the diffraction surface 5332 is preferably dark blue, black, or dark green; when a blue light beam is used, the area around the aperture is preferably yellow, orange, or red.

[0055] When all the stacked cardboard pieces are against the surface of the front baffle 4, the drive plate 511 is also pushed to be flush with the surface of the front baffle 4, i.e., inside the mounting slot 41. During the pushing process, the drive plate 511 drives the positioning block 5331 to move synchronously through the transmission rod 52. At this time, since the cardboard is in place, the beam of light emitted by the calibration component 91 passes through the positioning holes on the positioning block 5331 from top to bottom, and finally shines on the display plate 12.

[0056] When some of the cardboard does not fully reach the surface of the front baffle 4, the positioning through hole 5333 on the corresponding positioning block 5331 is not on the path of the light beam, and thus illuminates the diffraction surface 5332. The light-transmitting material will refract, scatter or change color, forming an obvious "abnormal state".

[0057] This visually alerts the loading personnel that some areas of cardboard are not fully against the front baffle 4, allowing the loading personnel to promptly push the cardboard in that area to the front baffle.

[0058] like Figure 7As shown, the calibration component 91 and the display plate 12 are fixed to the top and bottom of the front baffle 4 respectively via the first connecting rod 911 and the second connecting rod 921. The display plate 12 is suspended and does not interfere with the moving cardboard. The diameter 5333 of the positioning through hole is larger than the diameter of the beam, and the difference between the diameter of the positioning through hole 5333 and the diameter of the beam is the allowable error range.

[0059] The following is a detailed description of the transmission component. For example... Figures 2-4 As shown, the conveying assembly 6 includes a plurality of parallel paper feeding shafts 61. The paper feeding shafts 61 are located in the hollow part of the frame 1 and at the bottom of the support crossbar 21. A plurality of paper feeding rollers 62 are sleeved on the surface of the paper feeding shafts 61. One end of the paper feeding shafts 61 is mounted on the frame 1 by bearings, and the other end is mounted on the power box 63.

[0060] The power box 63 is equipped with at least one servo motor. The output of the servo motor is driven by the end of one of the paper feeding shafts 61. The ends of the other adjacent paper feeding shafts 61 are connected by a transmission belt or chain, thereby realizing the linkage drive of each paper feeding shaft 61. The structure and arrangement of the drive components in the power box 63 are consistent with the structure and distribution of drive components in common paper feeding mechanisms in the prior art. The overall shape of the power box 63 is not limited to the specific shape shown in the accompanying drawings.

[0061] The top of the paper feed shaft 61 is covered with a guide plate 7, which has a through groove corresponding to the paper feed roller 62. The guide plate 7 is fixed on the frame 1. The top of the paper feed roller 62 passes through the through groove and protrudes from the surface of the frame 1. The paper feed roller 62 on the paper feed shaft 61 is rotated by a servo motor, and the rotating paper feed roller 62 feeds the paperboard into the next processing step.

[0062] In summary, the present invention has been described in detail through specific embodiments. However, the present invention is not limited to the above embodiments. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention. Any changes in their shape or structure should fall within the protection scope of the present invention, which is defined by the appended claims.

Claims

1. A feeding machine for corrugated cardboard box production, comprising a frame (1), wherein two symmetrically arranged support arms (2) are fixed on the frame (1), a support crossbar (21) is fixed between the two support arms (2), two symmetrically arranged side baffles (3) are fixed on the surface of the support crossbar (21), at least one front baffle (4) is fixed on the surface of the support crossbar (21) between the two side baffles (3), and a paper feeding conveying assembly (6) is provided on the frame (1) below the support crossbar (21), characterized in that: A position detection component is provided on the front baffle (4). The position detection component includes multiple stacked detection units (5). The cardboard pushes the detection units (5) to run. The pushed detection units (5) indicate whether the stacked cardboard is sufficiently against the surface of the front baffle (4). The position of the positioning unit (53) is calibrated by emitting a vertical beam through the calibration component (9).

2. The feeding machine for corrugated cardboard box production as described in claim 1, characterized in that: The detection unit (5) includes a detection unit (51), a transmission unit and a positioning unit (53) disposed on the front baffle (4). The detection unit (51) abuts against the cardboard, and the cardboard pushes the detection unit (51) to move. The detection unit (51) drives the positioning unit (53) to move through the transmission unit.

3. The feeding machine for corrugated cardboard box production as described in claim 2, characterized in that: The front baffle (4) is provided with an installation slot (41), the detection unit (5) is provided on the installation slot (41), the detection unit (51) includes a slender drive plate (511), the drive plate (511) is provided on the side of the front baffle (4) near the cardboard and protrudes from the surface of the front baffle (4), and multiple drive rods (512) are fixed on the outer wall of the drive plate (511) away from the cardboard, the drive rods (512) are slidably connected to the front baffle (4), and at least one drive rod (512) is sleeved with a spring; One of the drive crossbars (512) is connected to the transmission unit at one end, and drives the positioning unit (53) to move synchronously through the transmission unit.

4. The feeding machine for corrugated cardboard box production as described in claim 3, characterized in that: The positioning unit (53) includes a driven crossbar (531), which is fixed to the end of the transmission rod (52) and is arranged parallel to the drive crossbar (512). A positioning element (533) is fixed to the end of the driven crossbar (531).

5. The feeding machine for corrugated cardboard box production as described in claim 4, characterized in that: The end surface of the transmission rod (52) connected to the drive crossbar (512) is fitted with a second guide sleeve (521). The transmission rod (52) slides under the limitation of the second guide sleeve (521). The surface of the driven crossbar (531) is fitted with a third guide sleeve (532). The driven crossbar (531) slides inside the third guide sleeve (532).

6. The feeding machine for corrugated cardboard box production as described in claim 4, characterized in that: The positioning element (533) includes a positioning block (5331), the center portion of which has a positioning through hole (5333), and the top and bottom sidewalls of the positioning block (5331) are recessed towards the center to form a diffraction surface (5332).

7. The feeding machine for corrugated cardboard box production as described in claim 6, characterized in that: The positioning block (5331) is cylindrical, and the top and bottom sidewalls of the positioning block (5331) are recessed inward, forming an annular raised skirt at the edge of the positioning block (5331).

8. The feeding machine for corrugated cardboard box production as described in claim 6, characterized in that: The positioning block (5331) is made of transparent material, and the diffraction surface (5332) is coated with a light-transmitting coating of a different color than the light beam emitted by the calibration component (9).

9. The feeding machine for corrugated cardboard box production as described in claim 1, characterized in that: The calibration component (9) includes a calibration element (91) and a display plate (92), both of which are fixed on the front baffle (4). The calibration element (91) emits a vertical beam of light, which shines onto the display plate (92) at the bottom of the detection component.

10. The feeding machine for corrugated cardboard box production as described in claim 1, characterized in that: The conveying assembly (6) includes a plurality of parallel paper feeding shafts (61), which are arranged in the cutout of the frame (1) and located at the bottom of the support crossbar (21); The surface of the paper feeding shaft (61) is fitted with multiple paper feeding rollers (62). One end of the paper feeding shaft (61) is mounted on the frame (1) via a bearing, and the other end is mounted on the power box (63).

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