Smoothness detection device for production of special paperboard for carton digital printing

Abstract

The utility model discloses a smoothness detection device for producing a special paperboard for digital printing of a carton, which comprises a paperboard turnover mechanism for turning over the paperboard and two paperboard smoothness detection mechanisms for conveying the paperboard and detecting the surface smoothness of the paperboard, the two paperboard smoothness detection mechanisms are located on the two sides of the paperboard turn-over mechanism correspondingly and used for detecting the smoothness of the two sides of the surface of a paperboard correspondingly. The paperboard turnover mechanism is provided with a first turnover assembly and a second turnover assembly which are used for supporting the two ends of a paperboard and rotating and turning over the paperboard. According to the utility model, smoothness detection can be carried out on the two side surfaces of the paperboard, manual turn-over operation is not needed, the workload is reduced, the detection efficiency is improved, the paperboards with different widths can be turned over conveniently, and the universality is enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of printing cardboard production detection, in particular to a smoothness detection device for producing cardboard special for digital printing of cartons. Background Art

[0002] During the production process of cardboard specially used for digital printing of cartons, the surface of the cardboard is prone to unevenness due to process and other reasons. When printing on the cardboard, the printing effect will not be good and defective printing products are likely to appear. At this time, a smoothness detection device is needed to detect the smoothness of the cardboard.

[0003] After testing, patent announcement number CN2041254291U discloses a plate smoothness detection device, including a workbench 1 and a bracket 2 arranged directly above the workbench 1. The workbench 1 is provided with a detection unit, the bracket 2 is provided with a lead screw 3, and the lead screw 3 is provided with a feeding unit that can move along the length direction of the lead screw 3. The workbench 1 is also provided with a display screen. The detection unit is electrically connected to the display screen 4. The detection unit is composed of a side pressure wheel fixedly mounted on one side of the workbench 1, an adjustment side pressure wheel fixedly mounted on the other side of the workbench 1, and a laser rangefinder 5 fixedly mounted on the adjustment side pressure wheel. The positions of the side pressure wheel and the adjustment pressure wheel correspond to each other. The beneficial effects of this utility model are simple structure and strong practicality.

[0004] In actual use, the existing smoothness detection device for cardboard production specially used for digital printing of cartons generally needs to detect the smoothness of both sides of the cardboard. When performing the smoothness detection on both sides of the cardboard, the cardboard needs to be turned over. Previously, the cardboard was generally turned over manually, which was labor-intensive and affected the detection efficiency of the cardboard smoothness. It was also inconvenient to turn over cardboards of different widths. Therefore, a smoothness detection device for cardboard production specially used for digital printing of cartons was designed. Utility Model Content

[0005] In view of the defects or shortcomings of the smoothness detection device for the production of cardboard specially used for digital printing of cartons, the purpose of the present utility model is to provide a smoothness detection device for the production of cardboard specially used for digital printing of cartons, which can detect the smoothness of the surfaces of both sides of the cardboard without the need for manual turning operation, thereby reducing the workload, improving the detection efficiency, and facilitating the turning of cardboards of different widths, thereby enhancing versatility.

[0006] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical solutions:

[0007] The utility model provides a smoothness detection device for producing cardboard specially used for digital printing of carton boxes, comprising a cardboard turning mechanism for turning over the cardboard and a cardboard smoothness detection mechanism for conveying the cardboard and detecting the smoothness of the cardboard surface. The cardboard smoothness detection mechanisms are two, and the two cardboard smoothness detection mechanisms are respectively located on both sides of the cardboard turning mechanism, and the two cardboard smoothness detection mechanisms are respectively used to detect the smoothness of both sides of the cardboard surface;

[0008] The cardboard flipping mechanism is provided with a first flipping assembly and a second flipping assembly for respectively supporting and rotating the two ends of the cardboard, and the first flipping assembly and the second flipping assembly are respectively arranged on the first mounting plate and the second mounting plate. The cardboard flipping mechanism is provided with an adjustment assembly for adjusting the distance between the first flipping assembly and the second flipping assembly and a reduction motor for driving the first flipping assembly and the second flipping assembly to rotate.

[0009] The cardboard smoothness detection mechanism is provided with a detection component for detecting the smoothness of the cardboard surface, a belt conveyor component for conveying the cardboard, and a cardboard conveying guide component for limiting and guiding the conveyance of the cardboard.

[0010] Preferably, the first flip assembly and the second flip assembly are both composed of a roller, a connecting shaft and a flip plate. The connecting shaft is installed at the center of the outer wall of one side of the roller, and the flip plate is installed on the circumferential outer wall of the roller, and the flip plates are distributed in a ring array.

[0011] The other end of the connecting shaft on the first flip assembly passes through the bearing on the outer wall of the first mounting plate and is connected to the reduction motor through a coupling. The reduction motor is installed on the upper surface of the first support block, and the first support block is installed above the outer wall of one side of the first mounting plate. The other end of the connecting shaft on the second flip assembly is installed in the bearing on the outer wall of the second mounting plate.

[0012] Preferably, a first connecting column and a second connecting column are provided between the first flip assembly and the second flip assembly, one end of the first connecting column is installed at the center position of the outer wall of one side of the roller on the first flip assembly, and a mounting groove is provided at the center position of the end wall of the first connecting column, and a limiting groove is provided on the circumferential inner wall of the mounting groove, and the limiting grooves are distributed in a ring array, one end of the second connecting column is installed at the center position of the outer wall of one side of the roller on the second flip assembly, and a limiting block is installed on the circumferential outer wall of the second connecting column, and the limiting blocks are distributed in a ring array, the other end of the second connecting column is installed in the mounting groove, the limiting block on the second connecting column is located in the limiting groove, the outer wall of the second connecting column and the groove wall of the mounting groove are clearance fit, and the outer wall of the limiting block and the groove wall of the limiting groove are clearance fit.

[0013] Preferably, two movable plates are provided on the adjusting assembly, and through holes are provided at the front and rear ends of the outer wall of the movable plate, and a guide rod is installed in the through hole, and there is a clearance fit between the outer wall of the guide rod and the hole wall of the through hole, and side plates are installed at both ends of the guide rod, and the side plates are installed on both sides of the upper surface of the first base, and first connecting blocks are installed at the front and rear ends of the upper surface of the movable plate, and the first connecting block is movably connected to one end of the connecting plate through a movable pin shaft, and the other end of the connecting plate is movably connected to the second connecting block through a movable pin shaft, and the second connecting blocks are installed on the outer walls on both sides of the mounting block.

[0014] Preferably, the mounting block is mounted on the top of the first hydraulic telescopic rod, and the first hydraulic telescopic rod is mounted on the front and rear ends of the upper surface of the first base, and sliders are mounted on the front and rear ends of the lower surface of the movable plate, and the bottom end of the slider is mounted on the slide rail, and the slider and the slide rail are slidably connected, and the slide rail is mounted on the front and rear ends of the upper surface of the first base, and the bottom ends of the first mounting plate and the second mounting plate are respectively mounted on the top of the two movable plates.

[0015] Preferably, the belt conveyor assembly is installed on the upper surface of the second base, the detection assembly is installed at the rear end of the upper surface of the second base, and the cardboard conveying guide assembly is installed at the four corners of the upper surface of the second base.

[0016] Preferably, the detection assembly is composed of a top plate, a CCD camera, a push plate, a computer, a first support plate, a second hydraulic telescopic rod and a second support block, the top plate is mounted on the top of the first support plate, and the bottom end of the top plate is mounted on the upper surface of the second base, the computer is mounted on the upper surface of the top plate, and the CCD camera is mounted on the lower surface of the top plate;

[0017] A second support block is installed on the rear end surface of the first support plate, a second hydraulic telescopic rod is installed on the upper surface of the second support block, and the other end of the second hydraulic telescopic rod passes through the end surface of the first support plate and is connected to the push plate.

[0018] Preferably, the cardboard conveying guide assembly is composed of a third hydraulic telescopic rod, a third support block, a second support plate and a limiting guide plate. The bottom end of the second support plate is installed on the upper surface of the second base, and the end face of one end of the second support plate is installed by the third hydraulic telescopic rod, and the other end of the third hydraulic telescopic rod passes through the end face of the second support plate and is connected to the limiting guide plate.

[0019] Compared with the existing technology, one or more of the above technical solutions have the following beneficial effects:

[0020] 1. In the present invention, through the coordinated arrangement of a series of structures, when the staff detects the smoothness of the cardboard surface, the staff causes the cardboard to be conveyed and inspected on the cardboard smoothness detection mechanism. When the result of the detection of one side of the cardboard surface by one cardboard smoothness detection mechanism meets the standard, the cardboard will be conveyed to the cardboard turning mechanism for turning over. The turned cardboard will be conveyed and inspected by another cardboard smoothness detection mechanism. Therefore, the present invention can detect the smoothness of both sides of the cardboard surface without manual turning operation, thereby reducing workload and improving detection efficiency.

[0021] 2. In the present invention, through the coordinated arrangement of the first flip assembly, the second flip assembly, the first connecting column, the second connecting column, the adjustment assembly and other structures, when the first hydraulic telescopic rod on the adjustment assembly is activated, the first hydraulic telescopic rod extends and contracts, driving the two movable plates to move along the outer wall of the guide rod. The two movable plates move along the outer wall of the guide rod, thereby adjusting the distance between the first flip assembly and the second flip assembly. The adjustable distance between the first flip assembly and the second flip assembly allows cardboards of different widths to be flipped, thereby enhancing versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0023] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the utility model Figure 1 .

[0024] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the utility model Figure 2 .

[0025] Figure 3 It is a structural schematic diagram of the cardboard turning mechanism of the utility model.

[0026] Figure 4 It is a structural diagram of the regulating component of the utility model.

[0027] Figure 5 It is a structural schematic diagram of the first flip assembly and the second flip assembly of the utility model.

[0028] Figure 6 It is a structural schematic diagram of the movable plate of the utility model.

[0029] Figure 7 It is a structural schematic diagram of the first connecting column of the utility model.

[0030] Figure 8It is a structural schematic diagram of the second connecting column of the utility model.

[0031] Figure 9 It is a structural schematic diagram of a cardboard smoothness detection mechanism of the present utility model.

[0032] Figure 10 It is a structural diagram of the detection component of the utility model.

[0033] Figure 11 It is a structural schematic diagram of the cardboard conveying guide assembly of the utility model.

[0034] In the picture:

[0035] Cardboard smoothness detection mechanism; 110, belt conveyor assembly; 120, detection assembly; 130, cardboard conveying guide assembly; 140, second base;

[0036] Top plate; 122, CCD camera; 123, push plate; 124, computer; 125, first support plate; 126, second hydraulic telescopic rod; 127, second support block;

[0037] 131. Third hydraulic telescopic rod; 132. Third support block; 133. Second support plate; 134. Position limiting guide plate;

[0038] 200, cardboard turning mechanism; 210, adjustment assembly; 220, reduction motor; 230, first turning assembly; 240, first connecting post; 250, second turning assembly; 260, second connecting post;

[0039] 211, first mounting plate; 2111, first support block; 212, second mounting plate; 213, movable plate; 2131, first connecting block; 2132, through hole; 2133, slider; 214, guide rod; 215, first hydraulic telescopic rod; 216, first base; 2161, side plate; 2162, slide rail; 217, mounting block; 2171, second connecting block; 218, connecting plate;

[0040] 231, rotating roller; 232, connecting shaft; 233, turning plate;

[0041] 241, mounting slot; 242, limiting slot;

[0042] 261. Limit block. DETAILED DESCRIPTION

[0043] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0044] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0045] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0046] like Figure 1-11 As shown, a smoothness detection device for cardboard production dedicated to carton digital printing includes a cardboard turning mechanism 200 for turning the cardboard over and a cardboard smoothness detection mechanism 100 for conveying the cardboard and detecting the smoothness of the cardboard surface. There are two cardboard smoothness detection mechanisms 100, which are respectively located on both sides of the cardboard turning mechanism 200 and are respectively used to detect the smoothness of both sides of the cardboard surface;

[0047] The cardboard flipping mechanism 200 is provided with a first flipping component 230 and a second flipping component 250 for supporting and rotating the two ends of the cardboard respectively, and the first flipping component 230 and the second flipping component 250 are respectively arranged on the first mounting plate 211 and the second mounting plate 212. The cardboard flipping mechanism 200 is provided with an adjustment component 210 for adjusting the distance between the first flipping component 230 and the second flipping component 250 and a reduction motor 220 for driving the first flipping component 230 and the second flipping component 250 to rotate.

[0048] The cardboard smoothness detection mechanism 100 is provided with a detection component 120 for detecting the smoothness of the cardboard surface, a belt conveyor component 110 for conveying the cardboard, and a cardboard conveying guide component 130 for limiting and guiding the conveyance of the cardboard.

[0049] The first flip assembly 230 and the second flip assembly 250 are both composed of a roller 231, a connecting shaft 232, and a flip plate 233. The connecting shaft 232 is installed at the center of the outer wall of one side of the roller 231. The flip plates 233 are installed on the circumferential outer wall of the roller 231. The flip plates 233 are arranged in a ring array. There is a certain distance between two adjacent flip plates 233 on the circumferential outer wall of the roller 231. The paperboard will be transported to the space between the two adjacent flip plates 233, and the flip plates 233 support the paperboard.

[0050] The other end of the connecting shaft 232 on the first flip assembly 230 passes through the bearing on the outer wall of the first mounting plate 211 and is connected to the reduction motor 220 through a coupling. The reduction motor 220 is mounted on the upper surface of the first support block 2111, and the first support block 2111 is mounted above the outer wall of one side of the first mounting plate 211. The other end of the connecting shaft 232 on the second flip assembly 250 is mounted in the bearing on the outer wall of the second mounting plate 212. When the reduction motor 220 is started, it will drive the first flip assembly 230 to rotate. The rotation of the first flip assembly 230 will drive the second flip assembly 250 to rotate through the first connecting column 240 and the second connecting column 260. When the first flip assembly 230 and the second flip assembly 250 rotate at the same time, they will drive the cardboard to perform a flip operation.

[0051] A first connecting post 240 and a second connecting post 260 are provided between the first flip assembly 230 and the second flip assembly 250. One end of the first connecting post 240 is mounted on the center position of the outer wall of the roller 231 on the first flip assembly 230. A mounting groove 241 is provided at the center position of the end wall of the first connecting post 240. A limiting groove 242 is provided on the circumferential inner wall of the mounting groove 241, and the limiting grooves 242 are distributed in a ring array. One end of the second connecting post 260 is mounted on the center position of the outer wall of the roller 231 on the second flip assembly 250. A limiting block 261 is installed on the circumferential outer wall of the second connecting post 260, and the limiting block 261 is distributed in a ring array. The other end of 60 is installed in the installation groove 241, and the limit block 261 on the second connecting column 260 is located in the limit groove 242. There is a clearance fit between the outer wall of the second connecting column 260 and the groove wall of the installation groove 241, and there is a clearance fit between the outer wall of the limit block 261 and the groove wall of the limit groove 242. The second connecting column 260, the first connecting column 240, the limit block 261, the installation groove 241, the limit block 261 and other structures are coordinated and arranged. The total length between the second connecting column 260 and the first connecting column 240 is adjustable, and under the coordination between the first connecting column 240 and the second connecting column 260, the first flip assembly 230 and the second flip assembly 250 are in a connected state.

[0052] The adjusting assembly 210 is provided with two movable plates 213, and the front and rear ends of the outer wall of the movable plate 213 are provided with through holes 2132, and guide rods 214 are installed in the through holes 2132. There is a clearance fit between the outer wall of the guide rod 214 and the hole wall of the through hole 2132. Because there is a clearance fit between the outer wall of the guide rod 214 and the hole wall of the through hole 2132, the movement of the movable plate 213 can be limited and guided, thereby enhancing the stability of the movable plate 213 during movement. Both ends of the guide rod 214 are installed with side plates 2161, and the side plates 2161 are installed on both sides of the upper surface of the first base 216. The front and rear ends of the upper surface of the movable plate 213 are installed with first connecting blocks 2131. The first connecting block 2131 is movably connected to one end of the connecting plate 218 through a movable pin, and the other end of the connecting plate 218 is movably connected to the second connecting block 2171 through a movable pin, and the second connecting block 2171 is installed on the outer walls of both sides of the mounting block 217.

[0053] The mounting block 217 is mounted on the top of the first hydraulic telescopic rod 215, and the first hydraulic telescopic rod 215 is mounted on the front and rear ends of the upper surface of the first base 216. Sliders 2133 are mounted on the front and rear ends of the lower surface of the movable plate 213. The bottom end of the slide 2133 is mounted on the slide rail 2162. The slide 2133 and the slide rail 2162 are slidably connected, and the slide rail 2162 is mounted on the front and rear ends of the upper surface of the first base 216. The matching arrangement of the slide 2133 and the slide rail 2162 can further play a role in limiting and guiding the movement of the movable plate 213, further enhancing the stability of the movable plate 213 when moving. The bottom ends of the first mounting plate 211 and the second mounting plate 212 are respectively mounted on the top ends of the two movable plates 213. When the first hydraulic telescopic rod 215 starts to extend and retract, it drives the two movable plates 213 to move along the outer wall of the guide rod 214, and the two movable plates 213 move in opposite directions. When the two movable plates 213 move in opposite directions along the outer wall of the guide rod 214, the distance between the first flipping assembly 230 and the second flipping assembly 250 can be adjusted. The adjustable distance between the first flipping assembly 230 and the second flipping assembly 250 allows cardboards of different widths to be flipped, thereby enhancing versatility.

[0054] The belt conveyor assembly 110 is installed on the upper surface of the second base 140 , the detection assembly 120 is installed at the rear end of the upper surface of the second base 140 , and the cardboard conveying guide assembly 130 is installed at the four corners of the upper surface of the second base 140 .

[0055] The inspection assembly 120 is composed of a top plate 121, a CCD camera 122, a push plate 123, a computer 124, a first support plate 125, a second hydraulic telescopic rod 126, and a second support block 127. The top plate 121 is mounted on the top of the first support plate 125, and the bottom of the top plate 121 is mounted on the upper surface of the second base 140. The computer 124 is mounted on the upper surface of the top plate 121, and the CCD camera 122 is mounted on the lower surface of the top plate 121. When the cardboard is conveyed to the bottom of the CCD camera 122 under the action of the belt conveyor assembly 110, the CCD camera 122 inspects the appearance of one side of the cardboard surface.

[0056] A second support block 127 is installed on the rear end surface of the first support plate 125, and a second hydraulic telescopic rod 126 is installed on the upper surface of the second support block 127. The other end of the second hydraulic telescopic rod 126 passes through the end surface of the first support plate 125 and is connected to the push plate 123. When the detected result does not meet the standard, the second hydraulic telescopic rod 126 is started, and the extension of the second hydraulic telescopic rod 126 will drive the push plate 123 to move. During the movement of the push plate 123, the cardboard that does not meet the standard can be pushed out from the belt conveyor assembly 110 to the outside.

[0057] The cardboard conveying guide assembly 130 is composed of a third hydraulic telescopic rod 131, a third support block 132, a second support plate 133 and a limiting guide plate 134. The bottom end of the second support plate 133 is installed on the upper surface of the second base 140, and the end surface of one end of the second support plate 133 is installed by the third hydraulic telescopic rod 131, and the other end of the third hydraulic telescopic rod 131 passes through the end surface of the second support plate 133 and is connected to the limiting guide plate 134. The limiting guide plate 134, the third hydraulic telescopic rod 131 and other structures are arranged in coordination. When the third hydraulic telescopic rod 131 starts to extend and retract, it can drive the limiting guide plate 134 to move, change the position of the limiting guide plate 134, thereby playing a limiting and guiding role for cardboards of different widths, thereby enhancing the stability of the cardboard during the conveying state on the cardboard conveying guide assembly 130.

[0058] Working principle: When in use, the external power supply is turned on. When the staff detects the smoothness of the cardboard, the staff makes the cardboard be conveyed and detected on a cardboard smoothness detection mechanism 100. When the cardboard is conveyed to the bottom of the CCD camera 122, the CCD camera 122 detects the appearance of the surface of one side of the cardboard. When the detection result does not meet the standard, the second hydraulic telescopic rod 126 is started. The extension of the second hydraulic telescopic rod 126 will drive the push plate 123 to move. During the movement of the push plate 123, the cardboard that does not meet the standard can be pushed out from the belt conveyor assembly 110 to the outside. When the detection result meets the standard, the cardboard will be conveyed to the cardboard flipping machine. The turned-over cardboard is turned over on the surface mechanism 200, and the turned-over cardboard is conveyed and inspected by another cardboard smoothness detection mechanism 100. When the cardboard is conveyed to the bottom of the CCD camera 122, the CCD camera 122 detects the appearance of the surface of the other side of the cardboard. When the detection result does not meet the standard, the second hydraulic telescopic rod 126 is started, and the extension of the second hydraulic telescopic rod 126 drives the push plate 123 to move. During the movement of the push plate 123, the cardboard that does not meet the standard can be pushed out from the belt conveyor assembly 110 to the outside, so that the smoothness of the surfaces of both sides of the cardboard can be detected, and no manual turning operation is required, which reduces the workload and improves the detection efficiency.

[0059] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A smoothness detection device for cardboard production for digital printing of carton, characterized in that: The invention comprises a cardboard turning mechanism (200) for turning over a cardboard, and a cardboard smoothness detection mechanism (100) for conveying the cardboard and detecting the smoothness of the cardboard surface. There are two cardboard smoothness detection mechanisms (100), and the two cardboard smoothness detection mechanisms (100) are respectively located on both sides of the cardboard turning mechanism (200), and the two cardboard smoothness detection mechanisms (100) are respectively used to detect the smoothness of both sides of the cardboard surface. The cardboard flipping mechanism (200) is provided with a first flipping assembly (230) and a second flipping assembly (250) for respectively supporting the two ends of the cardboard and rotating and flipping it, and the first flipping assembly (230) and the second flipping assembly (250) are respectively arranged on a first mounting plate (211) and a second mounting plate (212), and the cardboard flipping mechanism (200) is provided with an adjustment assembly (210) for adjusting the distance between the first flipping assembly (230) and the second flipping assembly (250), and a reduction motor (220) for driving the first flipping assembly (230) and the second flipping assembly (250) to rotate; The cardboard smoothness detection mechanism (100) is provided with a detection component (120) for detecting the smoothness of the cardboard surface, a belt conveyor component (110) for conveying the cardboard, and a cardboard conveying guide component (130) for limiting and guiding the conveyance of the cardboard.

2. The smoothness detection device for producing cardboard for digital printing of cartons according to claim 1, characterized in that: The first flip assembly (230) and the second flip assembly (250) are both composed of a roller (231), a connecting shaft (232), and a flip plate (233); the connecting shaft (232) is installed at the center of the outer wall of one side of the roller (231); the flip plates (233) are installed on the circumferential outer wall of the roller (231), and the flip plates (233) are distributed in a ring array; The other end of the connecting shaft (232) on the first flip assembly (230) passes through the bearing on the outer wall of the first mounting plate (211) and is connected to the reduction motor (220) through a coupling. The reduction motor (220) is installed on the upper surface of the first support block (2111), and the first support block (2111) is installed above the outer wall of one side of the first mounting plate (211). The other end of the connecting shaft (232) on the second flip assembly (250) is installed in the bearing on the outer wall of the second mounting plate (212).

3. The smoothness detection device for producing cardboard for digital printing of cartons according to claim 1, characterized in that: A first connecting column (240) and a second connecting column (260) are provided between the first flip assembly (230) and the second flip assembly (250). One end of the first connecting column (240) is mounted at the center of the outer wall of the roller (231) on the first flip assembly (230). A mounting groove (241) is provided at the center of the end wall of the first connecting column (240). A limiting groove (242) is provided on the circumferential inner wall of the mounting groove (241), and the limiting grooves (242) are distributed in a ring array. One end of the second connecting column (260) is mounted at the center of the outer wall of the second flip assembly (230). A limiting block (261) is installed on the circumferential outer wall of the second connecting column (260) at the center position of the outer wall of the roller (231) on the component (250), and the limiting blocks (261) are distributed in a ring array. The other end of the second connecting column (260) is installed in the installation groove (241), and the limiting block (261) on the second connecting column (260) is located in the limiting groove (242). There is a clearance fit between the outer wall of the second connecting column (260) and the groove wall of the installation groove (241), and there is a clearance fit between the outer wall of the limiting block (261) and the groove wall of the limiting groove (242).

4. The smoothness detection device for producing cardboard for digital printing of cartons according to claim 1, characterized in that: Two movable plates (213) are provided on the adjustment assembly (210), and through holes (2132) are provided at both front and rear ends of the outer wall of the movable plate (213). A guide rod (214) is installed in the through hole (2132), and a clearance fit is formed between the outer wall of the guide rod (214) and the hole wall of the through hole (2132). Side plates (2161) are installed at both ends of the guide rod (214), and the side plates (2161) are installed on both sides of the upper surface of the first base (216). First connecting blocks (2131) are installed at both front and rear ends of the upper surface of the movable plate (213), and the first connecting block (2131) is movably connected to one end of the connecting plate (218) through a movable pin shaft, and the other end of the connecting plate (218) is movably connected to the second connecting block (2171) through a movable pin shaft, and the second connecting block (2171) is installed on both sides of the outer walls of the mounting block (217).

5. The smoothness detection device for producing cardboard specially used for digital printing of cartons according to claim 4, characterized in that: The mounting block (217) is mounted on the top of the first hydraulic telescopic rod (215), and the first hydraulic telescopic rod (215) is mounted on the front and rear ends of the upper surface of the first base (216). Sliders (2133) are mounted on the front and rear ends of the lower surface of the movable plate (213). The bottom end of the slide block (2133) is mounted on the slide rail (2162). The slide block (2133) and the slide rail (2162) are slidably connected, and the slide rail (2162) is mounted on the front and rear ends of the upper surface of the first base (216). The bottom ends of the first mounting plate (211) and the second mounting plate (212) are respectively mounted on the top of the two movable plates (213).

6. The smoothness detection device for producing cardboard specially used for digital printing of cartons according to claim 1, characterized in that: The belt conveying assembly (110) is mounted on the upper surface of the second base (140), the detection assembly (120) is mounted at the rear end of the upper surface of the second base (140), and the cardboard conveying guide assembly (130) is mounted at the four corners of the upper surface of the second base (140).

7. The smoothness detection device for producing cardboard for digital printing of cartons according to claim 1, characterized in that: The detection assembly (120) is composed of a top plate (121), a CCD camera (122), a push plate (123), a computer (124), a first support plate (125), a second hydraulic telescopic rod (126), and a second support block (127); the top of the first support plate (125) is mounted on the top of the top plate (121), and the bottom of the top plate (121) is mounted on the upper surface of the second base (140); the upper surface of the top plate (121) is mounted on the computer (124), and the lower surface of the top plate (121) is mounted on the CCD camera (122); A second support block (127) is installed on the rear end surface of the first support plate (125), a second hydraulic telescopic rod (126) is installed on the upper surface of the second support block (127), and the other end of the second hydraulic telescopic rod (126) passes through the end surface of the first support plate (125) and is connected to the push plate (123).

8. The smoothness detection device for producing cardboard for digital printing of cartons according to claim 1, characterized in that: The cardboard conveying guide assembly (130) is composed of a third hydraulic telescopic rod (131), a third support block (132), a second support plate (133) and a limiting guide plate (134), wherein the bottom end of the second support plate (133) is mounted on the upper surface of the second base (140), the end surface of one end of the second support plate (133) is mounted with the third hydraulic telescopic rod (131), and the other end of the third hydraulic telescopic rod (131) passes through the end surface of the second support plate (133) and is connected to the limiting guide plate (134).

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