An intelligent sorting device for corrugated cardboard

Abstract

The present invention relates to the technical field of corrugated cardboard sorting, and specifically provides an intelligent corrugated cardboard sorting device, the sorting device comprising: a feeding conveying portion; a detection portion and a control portion provided on the feeding conveying portion, for detecting the size and surface quality of the corrugated cardboard; and a sorting portion, wherein the sorting portion, under the control of the control portion, transfers the corrugated cardboard whose size and surface quality meet preset parameters to the next process. The intelligent corrugated cardboard sorting device disclosed in an embodiment of the present invention is provided with a detection portion in the feeding stage, the detection portion detecting the size and surface quality of the corrugated cardboard. When the size and surface quality of the corrugated cardboard both meet the preset values, the control portion controls the sorting portion to transfer to the next process, thereby preventing the corrugated cardboard from having incorrect size or unsatisfactory surface quality, thereby improving the yield rate of carton boxes.

Description

Technical Field

[0001] The present invention relates to the technical field of corrugated cardboard sorting, and in particular to an intelligent corrugated cardboard sorting device. Background Art

[0002] During the production of cartons, corrugated cardboard raw materials of preset sizes need to be loaded into the processing area. During the loading process, loading errors or damage to the surface of the corrugated cardboard are inevitable, which will affect the yield rate of the cartons.

[0003] Currently, in the carton production process, there are no effective measures to reduce the yield reduction caused by damage to the size or surface of the corrugated cardboard. Therefore, this application proposes an intelligent sorting device for corrugated cardboard. Summary of the Invention

[0004] The purpose of the present invention is to provide an intelligent corrugated cardboard sorting device to solve the problem that the quality of corrugated paper affects the yield rate in the current carton production process.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An intelligent corrugated cardboard sorting device, comprising:

[0007] Loading and conveying department;

[0008] The detection unit and control unit, located on the feeding conveyor, are used to detect the size and surface quality of the corrugated paper. The detection unit includes a linear laser and an image acquisition module. The linear laser generates a light curtain that is inclined with respect to the conveying surface of the feeding conveyor. The light curtain forms a linear light spot perpendicular to the flow direction on the corrugated paper and the feeding conveyor. The control unit uses the image acquisition module to obtain real-time image information of the corrugated board and calculate its size.

[0009] The sorting section, under the control of the control unit, transfers the corrugated cardboards that meet the preset parameters in terms of size and surface quality to the next process;

[0010] Calculate the thickness H of the corrugated cardboard based on formula (1):

[0011] ;Formula (1)

[0012] A is the distance between the first light spot and the central axis of the image acquisition module, is the angle between the light curtain and the central axis, a is the pixel distance between the first light spot and the image center point in the image, and m is the pixel distance between the first light spot and the second light spot in the image. The first light spot is the light spot on the feeding conveyor, and the second light spot is the light spot on the corrugated cardboard.

[0013] Calculate the first dimension of the corrugated cardboard based on formula (2) :

[0014] ;Formula (2)

[0015] is the speed of the conveyor line, The interval time when the linear laser passes through the two end edges of the corrugated cardboard;

[0016] The second dimension W is calculated based on formula (3):

[0017] ;Formula (3)

[0018] w is the length of the second light spot, h is the distance between the focus of the image acquisition module and the conveying surface, is the focal length of the image acquisition module;

[0019] The surface quality of the corrugated cardboard is obtained based on the straightness of the linear light spot.

[0020] Furthermore, the sorting unit includes:

[0021] Sorting bracket;

[0022] A plurality of sorting rollers, the sorting rollers being rotatably connected to the sorting bracket, and each of the sorting rollers being provided with a plurality of roller wings at equal intervals;

[0023] a plurality of sorting rollers, wherein the sorting rollers are located between adjacent sorting rollers, and the rotating surfaces of the roller wings are aligned with the rotating surfaces of the sorting rollers;

[0024] A roller power motor, used to drive the sorting roller to rotate;

[0025] The roller lifting part is used to drive the sorting roller to rise and fall to control the contact or separation between the sorting roller and the roller wing. When the sorting roller descends, the sorting roller separates from the roller wing. When the sorting roller rises, the roller wing is tangent to the side of the sorting roller to drive the sorting roller to rotate.

[0026] Each of the roller wing plates contacts the sorting rollers on both sides, and the sorting rollers in different columns are arranged at intervals so that when the same roller wing plate contacts the sorting rollers in different columns, the roller wing plates are respectively located in different directions of the sorting rollers on both sides.

[0027] Furthermore, the sorting device further comprises:

[0028] A conveying unit, located downstream of the sorting unit, is used to convey corrugated cardboards with qualified size and surface quality to a carton production line;

[0029] The sorting and conveying part is located on the side of the sorting part, and the sorting part conveys the corrugated cardboard whose size and surface quality do not meet the preset values to the sorting and conveying part.

[0030] In summary, the present invention has the following beneficial effects compared with the prior art:

[0031] The intelligent corrugated cardboard sorting device disclosed in an embodiment of the present invention is provided with a detection unit in the loading stage. The detection unit detects the size and surface quality of the corrugated cardboard. When the size and surface quality of the corrugated cardboard meet the preset values, the control unit controls the sorting unit to flow to the next process, thereby preventing the corrugated cardboard from having incorrect size or surface quality that does not meet the requirements, thereby achieving the effect of improving the yield rate of carton boxes. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the overall structure of the corrugated cardboard intelligent sorting device disclosed in an embodiment of the present invention.

[0033] Figure 2 This is a schematic diagram of the structure of the detection unit in the corrugated cardboard intelligent sorting device disclosed in an embodiment of the present invention.

[0034] Figure 3 This is a schematic structural diagram of the sorting section in the intelligent corrugated cardboard sorting device disclosed in an embodiment of the present invention.

[0035] Figure 4 This is a top view of the sorting section in the intelligent corrugated cardboard sorting device disclosed in an embodiment of the present invention.

[0036] Figure 5 for Figure 4 Cross-sectional view of AA in the figure.

[0037] Figure 6 This is a schematic diagram of the principle of detecting the thickness of corrugated paper by the detection unit in the corrugated cardboard intelligent sorting device disclosed in an embodiment of the present invention.

[0038] Reference numerals:

[0039] 100, feeding and conveying unit; 200, detection unit; 210, bracket; 220, linear laser; 230, image acquisition module; 300, sorting unit; 310, sorting bracket; 320, sorting roller; 321, roller wing plate; 330, sorting roller; 331, roller bracket; 332, roller mounting plate; 340, roller power motor; 350, roller lifting unit; 400, control unit; 500, circulation and conveying unit; 600, sorting and conveying unit. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] like Figure 1 As shown, an embodiment of the present invention provides an intelligent corrugated cardboard sorting device, the sorting device comprising:

[0042] Loading and conveying part 100;

[0043] The detection unit 200 and the control unit 400 provided on the feeding and conveying unit 100 are used to detect the size and surface quality of the corrugated paper;

[0044] The sorting section 300 , under the control of the control section 400 , transfers the corrugated cardboards whose size and surface quality meet the preset parameters to the next process.

[0045] Specifically, when loading corrugated cardboard, the loading device of the carton production line places the corrugated cardboard on the loading conveyor part 100, and the corrugated cardboard moves along with the loading conveyor part 100. In the process of the corrugated cardboard moving to the sorting part 300, the corrugated cardboard flows through the detection part 200, and the detection part 200 detects the size and surface quality of the corrugated cardboard. The control part 400 controls the operation of the sorting part 300 based on the detection results to control the flow direction of the corrugated cardboard. For example, when the size and surface quality of the corrugated cardboard both meet the preset values, the sorting part 300 controls the corrugated cardboard to flow to the next process. When one of the size or surface quality of the corrugated cardboard does not meet the preset value, the sorting part 300 controls the corrugated cardboard to leave the production line.

[0046] The intelligent corrugated cardboard sorting device disclosed in an embodiment of the present invention is provided with a detection unit 200 in the loading stage. The detection unit 200 detects the size and surface quality of the corrugated cardboard. When the size and surface quality of the corrugated cardboard meet the preset values, the control unit 400 controls the sorting unit 300 to flow to the next process, thereby preventing the corrugated cardboard from having incorrect size or surface quality that does not meet the requirements, thereby achieving the effect of improving the yield rate of carton boxes.

[0047] Specifically, in this embodiment, the loading conveyor part 100 is a conveying structure in the prior art, such as a belt conveyor structure.

[0048] As a preferred implementation in this embodiment, Figure 2 As shown, the detection unit 200 includes a linear laser 220 and an image acquisition module 230. When the laser of the linear laser 220 is irradiated onto the corrugated paper, a linear light spot is generated that is perpendicular to the flow direction of the loading and conveying unit 100. The light curtain of the laser of the linear laser 220 is arranged at an angle to the conveying surface of the loading and conveying unit 100. The image acquisition module 230 is used to acquire image information of the corrugated paperboard. The image acquisition module 230 sends the acquired image information to the control unit 400. The control unit 400 calculates the size and surface quality of the corrugated paperboard based on the image information sent by the image acquisition module 230.

[0049] Specifically, in this embodiment, the linear laser 220 and the image acquisition module 230 are fixedly connected to the bracket 210, the bracket 210 is fixedly connected to one side of the loading and conveying part 100, the image acquisition module 230 is located directly above the loading and conveying part 100, the central axis of the image acquisition module 230 is perpendicular to the conveying surface of the loading and conveying part 100, and the image acquisition module 230 is a COMS camera.

[0050] As a preferred implementation in this embodiment, Figures 3 to 5 As shown, the sorting section 300 includes a sorting bracket 310, a sorting roller 320, a sorting roller 330, a roller lifting unit 350 and a roller power motor 340. The sorting rollers 320 and the sorting rollers 330 are each provided with a plurality of roller wings 321 evenly spaced on each of the sorting rollers 320. The sorting rollers 330 are located between adjacent sorting rollers 320. When the sorting rollers 320 rotate, the sorting rollers 330 are driven to rotate by the roller wings 321. The rotating surface of the roller wings 321 is aligned with the rotating surface of the sorting rollers 330. The roller lifting unit 350 is used to drive the sorting rollers 330 to rise and fall to control the contact or separation between the sorting rollers 330 and the roller wings 321. The roller power motor 340 is used to drive the sorting rollers 320 to rotate.

[0051] Specifically, in this embodiment, the sorting bracket 310 is a box-shaped structure provided at both ends of the sorting roller 320, the sorting bracket 310 is provided with supporting feet, the two ends of the sorting roller 320 are rotatably connected to the sorting bracket 310 through bearings, the roller wing 321 is a disc structure, and multiple roller wing 321 are equidistantly fixed on the sorting bracket 310, the outer edge of the roller wing 321 is tangent to the edge of the sorting roller 330, and the roller wing 321 is tangent to the edge of the sorting roller 330. When the wing plate 321 rotates, the roller wing plate 321 drives the sorting roller 330 to rotate. The sorting roller 330 is fixedly connected to the roller mounting plate 332 through the roller bracket 331. The roller bracket 331 is a U-shaped bracket. The roller bracket 331 and the sorting roller 330 are connected through a bearing. The roller bracket 331 is fixedly connected to the roller mounting plate 332 by bolts. The output end of the roller lifting part 350 is fixedly connected to the roller mounting plate by bolts. 332 is located at a side away from the sorting roller 330, and the roller lifting part 350 controls the lifting and lowering of the sorting roller 330 through the roller mounting plate 332. When the sorting roller 330 descends, the sorting roller 330 is disengaged from the roller wing 321, so that the roller wing 321 does not drive the sorting roller 330 to rotate. The roller power motor 340 is fixedly connected to the feeding conveying part 100, and the roller power motor 340 drives the sorting roller 320 to rotate through a gear structure. The sorting roller 320 is located at the end of the sorting bracket 310 and is fixed with a driven gear through a key shaft. A transition gear is provided between adjacent driven gears. The driven gear and the transition gear are engaged, so that the rotation directions of multiple sorting rollers 320 are the same. The output end of the roller power motor 340 is provided with a driving gear, and the driving gear is engaged with one of the driven gears, so that the roller power motor 340 can drive the driven gear to rotate.

[0052] Preferably, in this embodiment, each of the roller wing plates 321 contacts the sorting rollers 330 on both sides, and the sorting rollers 330 located in different columns are spaced apart so that when the same roller wing plate 321 contacts the sorting rollers 330 in different columns, the roller wing plates 321 are respectively located in different directions of the sorting rollers 330 on both sides, and the rotation directions of the sorting rollers 330 are the same, that is, the flow direction of the loading and conveying part 100 is used as the first direction, and the opposite direction of the first direction is used as the second direction. Then, the contact position of the roller wing plate 321 with the sorting roller 330 on its left side is located in the first direction of the sorting roller 330, and the contact position of the roller wing plate 321 with the sorting roller 330 on its right side is located in the second direction of the sorting roller 330.

[0053] One end of the feeding conveyor 100 is located at the feeding end of the sorting part 300. When the sorting roller 330 rotates, the corrugated cardboard moves on the sorting roller 330 to Figure 1 For example, when the sorting roller 330 is at the top of its track, the roller wing 321 contacts the sorting roller 330, and the roller wing 321 drives the sorting roller 330 to rotate, and the corrugated cardboard moves along the conveying direction of the feeding conveyor 100; when the sorting roller 330 descends, the sorting roller 330 and the roller wing 321 are separated, and the sorting roller 330 descends to the bottom of the sorting bracket 310, and the corrugated cardboard falls onto the sorting roller 320. At this time, when the sorting roller 320 rotates, the sorting roller 320 drives the corrugated cardboard to move in a direction perpendicular to the feeding conveyor 100, thereby completing the sorting of the corrugated cardboard.

[0054] As a preferred implementation in the embodiment, the control unit 400 is a computer or an industrial computer. The control unit 400 performs the following steps when obtaining the surface quality or size of the corrugated cardboard:

[0055] S1. Acquire image information of a linear laser scanning across a corrugated cardboard in real time based on the image acquisition module 230;

[0056] S2. Obtaining the thickness of the corrugated cardboard based on image information of the laser on the corrugated cardboard;

[0057] S3, obtaining a first size of the corrugated paperboard based on the time it takes for the laser to scan across the corrugated paperboard;

[0058] S4, obtaining a second size of the corrugated paperboard based on the laser length on the corrugated paperboard and the thickness of the corrugated paperboard;

[0059] S5. Obtain the surface quality of corrugated cardboard based on laser straightness.

[0060] Specifically, in this embodiment, a corrugated cardboard passes under the 200 under the drive of the 100. When the edge of the corrugated cardboard first contacts the edge of the corrugated cardboard, the image acquisition module 230 records the image information at this time, which is recorded as a first image. After a preset time, the image acquisition module 230 obtains an image of the corrugated cardboard, which is recorded as a second image. In the second image, a linear light spot exists on the surface of the corrugated cardboard. When the linear laser contacts the edge of the corrugated cardboard for the second time, the image acquisition module 230 obtains the image at this time, which is recorded as a third image. At the same time, when the linear laser exists on the corrugated cardboard, the 400 also detects the straightness of the linear laser in real time to detect whether the linear laser is bent.

[0061] In step S2, the 400 calculates the thickness of the corrugated cardboard based on the second image, specifically, as follows Figure 6 As shown, in the second image, there are two light spots, a first light spot and a second light spot. The first light spot is the light spot on the conveyor line, and the second light spot is the light spot on the corrugated cardboard. Since the relative positions of the conveyor line, the linear laser 220, and the image acquisition module 230 do not change, the distance between the first light spot and the central axis of the image acquisition module 230 is known, denoted as A, and the angle between the linear laser light curtain and the central axis is known, denoted as , let the pixel distance between the first light spot and the center point of the image in the second image be a, then the ratio of the pixel distance in the second image to the actual distance is a / A, that is, the actual distance between the first light spot and the second light spot is M, and the pixel distance between the first light spot and the second light spot in the second image is m, then the actual distance between the first light spot and the second light spot is Am / a, then the thickness of the corrugated cardboard is shown in formula (1):

[0062] ;Formula (1)

[0063] Where H is the thickness of the corrugated cardboard.

[0064] In step S3, the first size of the corrugated cardboard is calculated based on formula (2):

[0065] ;Formula (2)

[0066] in, is the first size, is the thickness of the conveyor line, It is the interval time when the linear laser passes through the two end edges of the corrugated cardboard.

[0067] In step S4, after calculating the thickness of the corrugated cardboard, the distance between the upper surface of the corrugated cardboard and the focus of the image acquisition module 230 can be calculated, and then the value of the second size is obtained according to the length of the second light spot in the second image, that is, the second size is calculated based on formula (3):

[0068] ;Formula (3)

[0069] Wherein, W is the second size, w is the length of the second light spot, h is the distance between the focus of the image acquisition module 230 and the conveying surface of 100, is the focal length of the image acquisition module 230.

[0070] As a preferred implementation in this embodiment, Figure 1 As shown, the sorting device also includes:

[0071] The circulation conveying section 500 is located downstream of the sorting section 300. The circulation conveying section 500 is a conveyor belt structure and is used to convey corrugated cardboard with qualified size and surface quality to the carton production line.

[0072] As a preferred implementation in this embodiment, Figure 1 As shown, the sorting device also includes:

[0073] The sorting and conveying section 600 is located on the side of the sorting section 300. The sorting section 300 conveys the corrugated cardboard whose size and surface quality do not meet the preset values to the sorting and conveying section 600, and the sorting and conveying section 600 conveys it to the collection position. The sorting and conveying section 600 is a conveyor belt structure.

[0074] It should be noted that the first size and the second size are the length and width of the corrugated cardboard, respectively. The pixel distance and the length of the second light spot are the number of pixels. If the first light spot and the second light board are both straight lines in the second image, the number of pixels occupied by the shortest line between the midpoint of the second image and the straight line where the first light spot is located is the pixel distance between the midpoint of the second image and the first light spot.

[0075] In step S5, the 230 acquires an image of the second light spot in real time. Since the optical axis of the 220 and the conveying surface of the 100 have a certain angle, when the surface of the corrugated cardboard is flat, the second light spot is a line. When there are potholes on the surface of the corrugated cardboard, that is, the surface of the corrugated cardboard is damaged, the second light spot will be distorted when passing through the damaged area. That is, the image of the second light spot in the second image is no longer a straight line. The distorted straight line does not meet the straightness requirement, and the surface quality of the corrugated cardboard can be detected.

[0076] The terms used in this invention are for the purpose of describing specific embodiments only and are not intended to limit the invention. The singular forms "a," "the," and "the" used in this invention and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0077] It should be understood that although the terms "first," "second," "third," etc. may be used in the present invention to describe various information, such information should not be limited to these terms. These terms are merely used to distinguish information of the same type from one another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present invention. Depending on the context, the term "if" as used herein may be interpreted as "when," "when," or "in response to determining."

[0078] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent corrugated cardboard sorting device, characterized in that: The sorting device comprises: Loading and conveying department; The detection unit and control unit, located on the feeding conveyor, are used to detect the size and surface quality of the corrugated paper. The detection unit includes a linear laser and an image acquisition module. The linear laser generates a light curtain that is inclined with respect to the conveying surface of the feeding conveyor. The light curtain forms a linear light spot perpendicular to the flow direction on the corrugated paper and the feeding conveyor. The control unit uses the image acquisition module to obtain real-time image information of the corrugated board and calculate its size. The sorting section, under the control of the control unit, transfers the corrugated cardboards that meet the preset parameters in terms of size and surface quality to the next process; Calculate the thickness H of the corrugated cardboard based on formula (1): ; Formula (1) A is the distance between the first light spot and the central axis of the image acquisition module, is the angle between the light curtain and the central axis, a is the pixel distance between the first light spot and the image center point in the image, and m is the pixel distance between the first light spot and the second light spot in the image. The first light spot is the light spot on the feeding conveyor, and the second light spot is the light spot on the corrugated cardboard. Calculate the first dimension of the corrugated cardboard based on formula (2) : Formula (2) is the speed of the conveyor line, The interval time when the linear laser passes through the two end edges of the corrugated cardboard; The second dimension W is calculated based on formula (3): Formula (3) w is the length of the second light spot, h is the distance between the focus of the image acquisition module and the conveying surface, is the focal length of the image acquisition module; The surface quality of the corrugated cardboard is obtained based on the straightness of the linear light spot.

2. The intelligent corrugated cardboard sorting device according to claim 1, characterized in that: The sorting unit includes: Sorting bracket; A plurality of sorting rollers, the sorting rollers being rotatably connected to the sorting bracket, and each of the sorting rollers being provided with a plurality of roller wings at equal intervals; a plurality of sorting rollers, wherein the sorting rollers are located between adjacent sorting rollers, and the rotating surfaces of the roller wings are aligned with the rotating surfaces of the sorting rollers; A roller power motor, used to drive the sorting roller to rotate; The roller lifting part is used to drive the sorting roller to rise and fall to control the contact or separation between the sorting roller and the roller wing. When the sorting roller descends, the sorting roller separates from the roller wing. When the sorting roller rises, the roller wing is tangent to the side of the sorting roller to drive the sorting roller to rotate.

3. The intelligent corrugated cardboard sorting device according to claim 2, characterized in that: Each of the roller wing plates contacts the sorting rollers on both sides, and the sorting rollers in different columns are arranged at intervals so that when the same roller wing plate contacts the sorting rollers in different columns, the roller wing plates are respectively located in different directions of the sorting rollers on both sides.

4. The intelligent corrugated cardboard sorting device according to claim 1, characterized in that: The sorting device further comprises: A conveying unit, located downstream of the sorting unit, is used to convey corrugated cardboards with qualified size and surface quality to a carton production line; The sorting and conveying part is located on the side of the sorting part, and the sorting part conveys the corrugated cardboard whose size and surface quality do not meet the preset values to the sorting and conveying part.

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