Quality inspection machine for folding carton

Abstract

The utility model discloses a quality inspection machine for folded cartons, which comprises a paper feeding part, a before-detection conveying part, a detection part, an after-detection conveying part, a waste rejecting part, an after-waste-rejecting conveying part and a paper collecting and stacking part which are sequentially arranged from front to back, as well as a waste transverse discharging part arranged below the after-waste-rejecting conveying part, the waste removing part is mainly composed of a rotatable conveying belt mechanism; when the cartons detected to be qualified by the detection part are conveyed, the conveying belt mechanism is in a horizontal state and is used for conveying the cartons to the waste kicking conveying part; and when the cartons detected to be unqualified by the detection part are conveyed, the conveying belt mechanism is in a state of inclining towards the lower rear part and is used for conveying the cartons to the waste transverse discharging part. The printing quality of the front face and the back face of the folding carton can be detected optically at the same time, unqualified products after detection are removed and collected independently, meanwhile qualified products after detection are stacked and collected, and the quality of corrugated paper packaging boxes used in the packaging procedure of a winery is greatly improved.

Description

Technical Field

[0001] The utility model relates to a quality inspection machine for folding cartons, belonging to the technical field of inspection machines. Background Art

[0002] At present, corrugated cartons are often used in the later packaging link of the wine manufacturing industry. Since some skin damages are inevitable during the logistics process of corrugated cartons from suppliers to wine packaging factories, it is difficult for wineries to ensure the integrity of the used corrugated cartons in the packaging link. Most of the existing printed matter quality inspection machines can only inspect products with a small thickness and can be bent. Most of the products that meet the inspection conditions are cardboard. For products such as corrugated cartons that are thick and cannot be bent in the folded state, the existing printed matter quality inspection machines cannot perform the operation of removing the waste products after detection, so that the unqualified products cannot be collected separately, which affects the quality inspection of corrugated cartons for packaging and the quality of the finished wine packaging products.

[0003] Therefore, in order to meet the quality inspection of corrugated cartons for packaging, especially to perform quality detection on corrugated cartons in the folded state with a large thickness and cannot be bent, those skilled in the art urgently need to improve the existing printed matter quality inspection machines to realize the automatic detection of the quality of folding cartons. Summary of the Invention

[0004] Aiming at the above existing technical problems, the utility model provides a quality inspection machine for folding cartons, aiming to realize the optical detection of the front and back printing quality of folding cartons, remove and collect the unqualified products after detection separately, and stack and collect the qualified products after detection.

[0005] To achieve the above purpose, the utility model provides a quality inspection machine for folding cartons, which includes a paper feeding part, a pre-detection conveying part, a detection part, a post-detection conveying part, a waste removal part, a post-waste removal conveying part, and a paper collecting and stacking part arranged in sequence from front to back, and a waste horizontal outlet part arranged below the post-waste removal conveying part;

[0006] The detection part includes a front detection system and a back detection system;

[0007] The front detection system includes a front strip light source and a front detection camera; the front strip light source is arranged above the gap between the pre-detection conveying part and the post-detection conveying part, and the front detection camera is arranged at the rear upper part of the front strip light source and can receive the light emitted by the front strip light source and reflected back by the front of the carton to be detected;

[0008] The back detection system includes a back strip light source, a back reflecting mirror and a back detection camera; the back strip light source is arranged below the gap between the pre-detection conveying section and the post-detection conveying section; the back reflecting mirror is arranged below and behind the back strip light source; the back detection camera is arranged behind the back reflecting mirror and can receive the light emitted by the back strip light source and reflected back in sequence by the back of the carton to be detected and the back reflecting mirror;

[0009] The rejection section is mainly composed of a rotatable conveyor belt mechanism; when transporting the cartons qualified by the inspection section, the conveyor belt mechanism is in a horizontal state for transporting the cartons to the post-rejection conveying section; when transporting the cartons unqualified by the inspection section, the conveyor belt mechanism is in an inclined state towards the back and downwards for transporting the cartons to the waste horizontal outlet section.

[0010] Further, the front detection system of the present utility model further includes a second connecting member and two third connecting members; the third connecting members are placed vertically, with a cylindrical hole provided in its upper part, and a set screw threaded hole arranged radially in the cylindrical hole; the second connecting member is placed horizontally perpendicular to the conveying direction, with a front strip light source installed on its side surface, and the cylindrical shaft heads provided at both ends are respectively installed in the cylindrical holes of the corresponding third connecting members and can rotate in the cylindrical holes, so as to adjust the angle of the front strip light source; a long strip-shaped through hole is provided in the lower part of the third connecting member and is installed on the frame of this quality inspection machine through the long strip-shaped through hole, so as to adjust the height of the front strip light source.

[0011] Still further, the front detection system of the present utility model further includes an upper shield, a cross beam, four first connecting members, a transverse slide rail structure, a vertical slide rail structure and a front camera frame; the upper shield is installed at the rear of the pre-detection conveying section and the front of the post-detection conveying section; the cross beam is arranged horizontally along the conveying direction, and the left and right side surfaces at both ends are respectively installed on the inner wall of the upper shield through a first connecting member; the transverse slide rail structure is installed on the cross beam along the conveying direction; the vertical slide rail structure is vertically installed on the transverse slide rail structure; the front camera frame is installed on the vertical slide rail structure, and the front detection camera is installed on the front camera frame.

[0012] Still further, the front detection system of the present utility model further includes four front shock absorbers; each first connecting member is fixed on the upper shield through a front shock absorber.

[0013] Further, the back detection system of the present utility model further includes a fifth connecting member and two fourth connecting members; the fourth connecting member is placed vertically, with a cylindrical hole provided in its upper part, and a setscrew threaded hole is radially arranged in the cylindrical hole; the fifth connecting member is placed horizontally perpendicular to the conveying direction, a back strip light source is installed on its side surface, and cylindrical shaft heads provided at both ends thereof are respectively installed in the cylindrical holes of the corresponding fourth connecting members and can rotate in the cylindrical holes, so as to adjust the angle of the back strip light source; a long strip-shaped through hole is provided in the lower part of the fourth connecting member, and the fourth connecting member is installed on the frame of the quality inspection machine through the long strip-shaped through hole, so as to adjust the height of the back strip light source.

[0014] Furthermore, the back detection system of the present utility model further includes a second fixing member and two first fixing members; the second fixing member is placed horizontally perpendicular to the conveying direction, a reflector is installed on its side surface, and both ends thereof are respectively connected to one end of the corresponding first fixing member; the other end of the first fixing member is connected to the corresponding long strip-shaped through hole on the frame of the quality inspection machine by screws, so as to adjust the height and angle of the reflector.

[0015] Furthermore, the back detection system of the present utility model further includes a connecting beam, a fixing frame, a slide rail structure, a slide rail structure, and a back camera frame; the connecting beam is placed perpendicular to the conveying direction, and both ends thereof are respectively installed on both sides of the frame through a fixing frame; the slide rail structure is placed along the conveying direction and installed on the connecting beam; the back camera frame is installed on the slide rail structure, and a back detection camera is installed on the slide rail structure.

[0016] Furthermore, the back detection system of the present utility model further includes four back shock absorbers; each fixing frame is fixed on both sides of the frame through a back shock absorber.

[0017] Further, the conveying belt mechanism of the rejection part includes a driving roller, two fixed guide plate structures, two rejection rotating arm structures, two cylinder structures, two conveyor belts, and two paper pressing wheel structures; the driving roller is placed horizontally perpendicular to the conveying direction; the two fixed guide plate structures are installed above and behind the driving roller and are placed side by side along the conveying direction; the two rejection rotating arm structures are installed above the corresponding fixed guide plate structures and are placed side by side, the front end of each rejection rotating arm structure is connected to the front end of the corresponding fixed guide plate structure through a rotating shaft, and the rear end is connected to the frame below the rear end of the corresponding fixed guide plate structure through a cylinder structure, and the cylinder structure can drive the rejection rotating arm structure to rotate around the rotating shaft as the central axis; the two conveyor belts respectively surround the driving roller, the driving wheels at the front ends of the corresponding fixed guide plate structures, the driving wheels at the rear ends of the corresponding rejection rotating arm structures, and the rotating shaft; the two paper pressing wheel structures are installed above the corresponding rejection rotating arm structures and are placed side by side.

[0018] Furthermore, for the present utility model, the upper dead center at which the two waste removal rotating arms rotate is the position where the conveyor belt is horizontal, and the lower dead center is the position where the conveyor belt is 4 - 6 degrees downward from the horizontal.

[0019] In summary, the present utility model can simultaneously perform optical detection on the printing quality of the front and back of a folding carton, remove the unqualified products after detection and collect them separately, and stack and collect the qualified products after detection, greatly improving the quality of the corrugated paper packaging boxes used in the packaging process of wineries.

[0020] Compared with the prior art, the technical advantages of the present utility model are as follows:

[0021] 1. The present utility model can realize the detection of the quality of the back of the printed matter, so as to simultaneously detect the quality of the printing surface and the back of the printed matter, greatly improving the overall quality of the finished product.

[0022] 2. The present utility model can especially detect the quality of corrugated paper packaging boxes in a folded state with a relatively large thickness and non - bendable.

[0023] 3. The present utility model can remove the unqualified products after detection, separately collect the unqualified products, and stack and collect the qualified products.

[0024] 4. The present utility model has a simple structure, low cost, and remarkable effect. It is especially suitable for folding cartons and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the present utility model;

[0026] Figure 2 is a schematic structural principle diagram of the present utility model

[0027] Figure 3 is a schematic diagram of the movement and removal process of an unqualified carton during the implementation of the present utility model;

[0028] Figure 4 is a schematic structural diagram of the front - side detection part in the present utility model;

[0029] Figure 5 is the present utility model Figure 4 an enlarged schematic structural diagram of part A therein;

[0030] Figure 6 is a schematic structural diagram of the back - side detection part in the present utility model;

[0031] Figure 7 is the present utility model Figure 6 an enlarged schematic structural diagram of part B therein;

[0032] Figure 8 is the present utility modelFigure 6 Schematic enlarged structure diagram at position C in the [device name];

[0033] Figure 9 This is the structural schematic of the waste rejection part in the utility model Figure 1 ;

[0034] Figure 10 This is the structural schematic of the waste rejection part in the utility model Figure 2 ;

[0035] In the figure: 1. Paper feeding part, 2. Pre - detection conveying part, 3. Carton, 4. Front strip light source, 5. Front detection camera, 6. Rear reflector, 7. Post - detection conveying part, 8. Waste rejection part, 9. Post - waste - rejection conveying part, 10. Paper stacking part, 11. Baffle, 12. Waste horizontal output part, 13. Rear detection camera, 15. Rear strip light source, 4.1. Upper protective cover, 4.2. Cross beam, 4.3. First connecting piece, 4.4. Front shock absorber, 4.5. Vertical slide rail structure, 4.6. Front camera bracket, 4.7. Horizontal slide rail structure, 4.8. Second connecting piece, 4.9. Third connecting piece, 5.1. Fixed bracket, 5.2. Rear shock absorber, 5.3. Connecting beam, 5.4. Slide rail structure, 5.5. Rear camera bracket, 5.6. First fixing piece, 5.7. Second fixing piece, 5.8. Fourth connecting piece, 5.9. Fifth connecting piece, 5.10. Reflector, 6.1. Driving roller, 6.2. Fixed guide plate structure, 6.3. Waste rejection rotating arm structure, 6.4. Cylinder structure, 6.5. Paper pressing wheel structure, 6.6. Conveyor belt. Detailed implementation mode

[0036] The following further describes the present utility model with reference to the accompanying drawings. In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0037] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, then such directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0038] In addition, if the descriptions such as "first", "second", etc. are involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0039] As Figure 1 shown, this embodiment provides a quality inspection machine for folding cartons, including a machine frame, a paper feeding part 1 arranged on the machine frame in sequence from front to back, a pre-detection conveying part 2, a detection part, a post-detection conveying part 7, a waste rejection part 8, a post-waste rejection conveying part 9 and a paper stacking part 10, and a waste horizontal discharging part 12 arranged below the post-waste rejection conveying part 9. Moreover, the detection part optically detects the appearance and printing quality of the front and back of the folding carton 3, rejects the unqualified products after detection for separate collection, and stacks and collects the qualified products after detection at the same time.

[0040] As Figure 2 shown, the detection part includes a front detection system and a back detection system. The front detection system is mainly composed of a front strip light source 4 and a front detection camera 5. The front strip light source 4 is arranged above the gap between the pre-detection conveying part 2 and the post-detection conveying part 7, and the front detection camera 5 is arranged behind and above the front strip light source 4 and can receive the light emitted by the front strip light source 4 and reflected back by the front of the carton 3 to be detected. The back detection system is mainly composed of a back strip light source 4, a back reflector 6 and a back detection camera 13. The back strip light source 4 is arranged below the gap between the pre-detection conveying part 2 and the post-detection conveying part 7, the back reflector 6 is arranged behind and below the back strip light source 4, and the back detection camera 13 is arranged behind the back reflector 6 and can receive the light emitted by the back strip light source 4 and reflected back in sequence by the back of the carton 3 to be detected and the back reflector 6.

[0041] As Figure 2As shown in the figure, the rejection unit 8 is mainly composed of a rotatable conveyor belt mechanism; when the carton 3 transported by the post-detection conveyor to it is a product qualified by the inspection unit, the conveyor belt mechanism is in a horizontal state, so that the carton 3 is sequentially sent to the post-rejection conveyor 9 and the paper collection and stacking unit through the rejection unit 8; when the carton 3 transported by the post-detection conveyor to it is a product unqualified by the inspection unit, the conveyor belt mechanism is in a state of tilting backward and downward, so that the carton 3 is sent out through the rejection unit 8, stops falling after hitting the baffle located behind the waste horizontal exit part 12, and falls onto the waste horizontal exit part 12.

[0042] As Figure 3 As shown in the figure, the working process of the quality inspection machine for folding cartons of the present invention is as follows: First, the cartons 3 to be detected are placed in the paper feeding unit 1 in the form of a paper stack. Specifically, in implementation, the paper feeding unit 1 can adopt an automatic feeding method or a manual feeding method, so that the paper stack of the paper feeding unit 1 can automatically rise while feeding, and it is ensured that the topmost carton 3 is always at a height suitable for feeding. Then, the carton 3 is sent from the paper feeding unit 1 to the conveyor belt of the pre-detection conveyor 2 at the rear, and the inspection unit can inspect the front and back of the carton 3. When the inspection is completed, the carton 3 continues to be transported backward on the conveyor belt of the post-detection conveyor 7, and then enters the rejection unit 8.

[0043] It should be noted that when the carton 3 qualified by the inspection unit passes through the rejection unit 8, the conveyor belt mechanism of the rejection unit 8 is in a horizontal state, so the qualified carton 3 continues to be transported backward on the conveyor belt mechanism of the rejection unit 8, enters the post-rejection conveyor 9, and finally falls into the paper collection and stacking unit 10 for stacking and collection. When the carton 3 unqualified by the inspection unit passes through the rejection unit 8, the conveyor belt mechanism of the rejection unit 8 will rotate backward and downward by a certain angle, so the unqualified carton 3 is transported obliquely downward on the conveyor belt mechanism of the rejection unit 8 until it stops falling after hitting the baffle 11 located behind the waste horizontal exit part 12, and falls onto the conveyor belt of the waste horizontal exit part 12. Finally, the unqualified cartons 3 are transported to the outside of the quality inspection machine in a fish-scale state.

[0044] In addition, specifically in implementation, during the transportation and rejection of the waste cartons 3, since the cartons 3 are too hard to bend, it is set that after more than 80% of the length of the waste cartons 3 in the transportation direction passes through the conveyor belt mechanism of the rejection unit 8, the conveyor belt mechanism can start to rotate downward to a certain angle.

[0045] As Figure 4As shown in the figure, in some other specific embodiments of the present utility model, the rest is the same as the above embodiments, except that the front detection system is located at the upper part of the quality inspection machine, and includes an upper shield 4.1 installed at the rear of the pre-detection conveyor section 2 and the front of the post-detection conveyor section 7, and a front strip light source 4 perpendicular to the conveying direction, that is, horizontally placed left and right, below the upper shield 4.1. The front strip light source 4 is located above the gap between the pre-detection conveyor section 2 and the post-detection conveyor section 7, and is fixed between the wall panels on both sides of the frame of the quality inspection machine through a second connecting member 4.8 and a third connecting member 4.9. Specifically, when implemented, the front strip light source 4 is installed on the side surface of the second connecting member 4.8 horizontally placed left and right. Both ends of the second connecting member 4.8 are respectively installed on the wall panels on the left and right sides of the frame of the quality inspection machine through a third connecting member 4.9, so that the front strip light source 4 is horizontally placed perpendicular to the conveying direction of the carton 3.

[0046] As Figure 5 shown, particularly, the front strip light source 4 can be adjusted in terms of angle and height under the action of the second connecting member 4.8 and the third connecting member 4.9 to obtain a better illumination effect. Specifically, when implemented, the second connecting member 4.8 is a square steel crossbeam, and the square steel crossbeam is horizontally placed perpendicular to the conveying direction, and both ends thereof have cylindrical shaft heads. The third connecting member 4.9 is a short square steel connecting rod, and the square steel connecting rod is vertically placed, and its upper part is a cylindrical hole, and the cylindrical hole is radially provided with a set screw threaded hole. This cylindrical hole is correspondingly connected to the cylindrical shaft heads at both ends of the second connecting member 4.8. After connection, the second connecting member 4.8 and the third connecting member 4.9 can rotate relative to each other, thereby adjusting the angle of the front strip light source 4. In addition, a long strip-shaped through hole is processed at the lower part of the square steel connecting rod, and the front strip light source 4 is installed on the frame of the quality inspection machine through the long strip-shaped through hole, thereby adjusting the height of the front strip light source 4.

[0047] As Figure 4 shown, in some other specific embodiments of the present utility model, the rest is the same as the above embodiments, except that the front detection system further includes a front detection camera 5 installed inside the upper shield 4.1 and capable of adjusting its position up and down and back and forth. Specifically, when implemented, the front detection system includes a crossbeam 4.2 horizontally placed front and back along the conveying direction. The left and right surfaces at both ends of the crossbeam 4.2 are respectively installed on the inner walls of the corresponding sides of the upper shield 4.1 through a first connecting member 4.3. A horizontal slide rail structure 4.7 placed front and back along the conveying direction is installed on the crossbeam 4.2. A vertical slide rail structure 4.5 placed up and down is installed on the horizontal slide rail structure 4.7. A front camera bracket 4.6 is installed on the vertical slide rail structure 4.5, and a front detection camera 5 is installed on the front camera bracket 4.6, thereby realizing the position adjustment of the front detection camera 5 in the up and down direction and the position adjustment in the front and back direction.

[0048] AsFigure 4 As shown in the figure, in some other specific embodiments of the present invention, the rest is the same as the above embodiments, except that each first connecting member 4.3 is fixed on the upper shield 4.1 through a front shock absorber 4.4, so as to reduce the adverse effect of machine vibration on the image-taking effect of the proof detection camera 5.

[0049] As Figure 6 As shown in the figure, in some other specific embodiments of the present invention, the rest is the same as the above embodiments, except that the back detection system is located at the lower part of the quality inspection machine and includes a back strip light source 15, and the back strip light source 15 is fixed between the wall panels on both sides of the frame of the quality inspection machine through two fourth connecting members 5.8 and a fifth connecting member 5.9. During specific implementation, the fifth connecting member 5.9 is horizontally placed perpendicular to the conveying direction, and both ends are respectively installed on both sides of the frame through a fourth connecting member 5.8, and the back strip light source 15 is installed on the side surface of the fifth connecting member 5.9.

[0050] As Figure 7 As shown in the figure, particularly, the back strip light source 15 can be adjusted in terms of angle and height under the action of the fourth connecting member 5.8 and the fifth connecting member 5.9 to obtain a better illumination effect. During specific implementation, the fifth connecting member 5.9 is a square steel cross beam, and the square steel cross beam is horizontally placed perpendicular to the conveying direction, and both ends thereof have cylindrical shaft heads. The fourth connecting member 5.8 is a short square steel connecting rod, and the square steel connecting rod is vertically placed, and its upper part is a cylindrical hole, and a set screw thread hole is radially arranged in the cylindrical hole. This cylindrical hole corresponds to the cylindrical shaft heads at both ends of the fifth connecting member 5.9 for connection. After connection, the fourth connecting member 5.8 and the fifth connecting member 5.9 can rotate relative to each other, so as to adjust the angle of the back strip light source 15. In addition, a long strip-shaped through hole is processed at the lower part of the square steel connecting rod, and the back strip light source 15 is installed on the frame of the quality inspection machine through the long strip-shaped through hole, so as to adjust the height of the back strip light source 15.

[0051] As Figure 6 As shown in the figure, in some other specific embodiments of the present invention, the rest is the same as the above embodiments, except that the back detection system further includes a mirror 5.10 placed horizontally left and right. The mirror 5.10 is located behind the back strip light source 15 and is installed between the wall panels on both sides of the frame of the quality inspection machine through two first fixing members 5.6 and a second fixing member 5.7.

[0052] As Figure 8As shown, specifically, the second fixing member 5.7 is horizontally placed perpendicular to the conveying direction, and both ends are respectively installed on both sides of the frame through a first fixing member 5.6; the reflector 5.10 is installed on the side of the second fixing member 5.7, and both the height and angle of the reflector 5.10 can be adjusted. In specific implementation, the second fixing member 5.7 is a strip-shaped flat plate. The first fixing member 5.6 is a mounting bracket. One end of the mounting bracket is flat for connecting with the second fixing member 5.7, and the other end is cylindrical with a threaded hole opened on the end face for connecting with the wall panel. At the same time, a long strip-shaped through hole is opened at the connection position between the wall panel and the mounting bracket. One end of the mounting bracket is fixedly connected to the corresponding end of the strip-shaped flat plate, and the other end is connected to the corresponding long strip-shaped through hole by screws, so as to realize the adjustment of the height and angle of the reflector 5.10.

[0053] As Figure 6 shown, in some other specific embodiments of the present invention, the rest is the same as the above embodiments, the difference is that the back detection system further includes a back detection camera 13 that can be adjusted horizontally. In specific implementation, the back detection system includes a connecting beam 5.3 placed horizontally left and right. Both the front and back ends of the connecting beam 5.3 are respectively installed on the wall panels of the frame where the post-detection conveying part 7 is located through a fixing bracket 5.1. A slide rail structure 5.4 placed front and back is installed on the connecting beam 5.3. A back camera bracket 5.5 is installed on the slide rail structure 5.4, and a back detection camera 13 is installed on the back camera bracket 5.5, so as to adjust the front and back distances.

[0054] As Figure 6 shown, in some other specific embodiments of the present invention, the rest is the same as the above embodiments, the difference is that a back shock absorber 5.2 is installed on each fixing bracket 5.1, which can reduce the adverse impact of machine vibration on the picture taking of the back detection camera 13.

[0055] As Figure 9 、 Figure 10 shown, the rotatable conveyor belt mechanism of the waste removal part 8 mainly consists of a driving roller 6.1, two fixed guide plate structures 6.2, two waste removal rotating arm structures 6.3, two cylinder structures 6.4, two conveyor belts 6.6, and two paper pressing wheel structures 6.5. The specific introduction is as follows.

[0056] The two fixed guide plate structures 6.2 are installed side by side along the conveying direction and can be adjusted in spacing according to the size of the carton 3. Driving wheels are respectively installed at the front ends of the two fixed guide plate structures 6.2. The driving roller 6.1 is installed below the front of the two fixed guide plate structures 6.2 and horizontally placed perpendicular to the conveying direction. The two waste removing rotating arm structures 6.3 are installed above the corresponding fixed guide plate structures 6.2 and placed side by side. The front end of each waste removing rotating arm structure 6.3 is fixed to the front end of the corresponding fixed guide plate structure 6.2 below through a rotating shaft, and the rear end is fixed to the frame below the rear end of the fixed guide plate structure 6.2 through a cylinder structure 6.4. Driving wheels are respectively installed at the rear ends of the two waste removing rotating arm structures 6.3. The two conveyor belts 6.6 respectively surround the driving roller 6.1, the driving wheels of the corresponding fixed guide plate structures 6.2, and the driving wheels and rotating shafts of the corresponding waste removing rotating arm structures 6.3. The two paper pressing wheel structures 6.5 are installed above the corresponding waste removing rotating arm structures 6.3 and placed side by side. Since the paper pressing wheel structure 6.5 is fixed integrally with the waste removing rotating arm structure 6.3, the pressing wheels in the paper pressing wheel structure 6.5 can always maintain the same pressure as the conveyor belt 6.6. Especially in the waste removing state, the paper pressing wheel structure 6.5 can rotate together with the waste removing rotating arm structure 6.3, so as to ensure the stable conveying of the detected paper.

[0057] As Figure 10 shown, it should be noted that the expansion and contraction of the cylinder in the cylinder structure 6.4 can drive the corresponding waste removing rotating arm structure 6.3 to rotate around the front rotating shaft as the center, that is, as Figure 8 , Figure 9 shown, the point M is the center of the rotating shaft for rotation, and the rotation angle N can be finely adjusted through the cylinder structure 6.4.

[0058] In some other specific embodiments of the present invention, the rest is the same as the above embodiments. The difference is that usually the upper dead point of the rotation of the waste removing rotating arm structure 6.3 is set to make the conveyor belt 6.6 in a horizontal position, and the lower dead point is set to make the conveyor belt 6.6 in a position 4 - 6 degrees downward horizontally, and the optimal is 4.5 degrees.

[0059] When this quality inspection machine is working properly, the two waste rejection rotating arm structures 6.3 are at the top dead center. The two conveyor belts 6.6, driven by the driving rollers 6.1, horizontally convey the qualified cartons 3 backward to the post-waste rejection conveying section 9. When the detection section of this quality inspection machine detects unqualified products, after the unqualified cartons 3 are conveyed to the waste rejection rotating arm structures 6.3, the cylinders in the two cylinder structures 6.4 retract simultaneously, thereby driving the two waste rejection rotating arm structures 6.3 to rotate downward to the bottom dead center, causing the unqualified cartons 3 to be conveyed obliquely backward and downward under the drive of the two conveyor belts 6.6 until the unqualified cartons 3 stop falling after encountering the baffle 11 located behind the waste horizontal output section 12 and fall onto the conveyor belt of the waste horizontal output section 12. Finally, the unqualified cartons 3 are conveyed to the outside of this quality inspection machine in a fish-scale state, thus achieving the purpose of removing unqualified products by the waste rejection section 8. After that, when the unqualified cartons 3 completely leave the conveyor belts 6.6 on the two waste rejection rotating arm structures 6.3, the cylinders in the two cylinder structures 6.4 extend simultaneously, thereby driving the two waste rejection rotating arm structures 6.3 back to the initial horizontal position.

[0060] In addition, the control device involved in this quality inspection machine is a well-known device in the art, so its specific composition will not be described in detail here. In actual use, devices such as the paper feeding section 1, the pre-detection conveying section 2, the post-detection conveying section 7, the waste rejection section 8, the post-waste rejection conveying section 9, the paper stacking section 10, the waste horizontal output section 12, and the detection section can share a control device or can be separately provided with a control device. This control device can be implemented using existing technologies, such as a single-chip microcomputer, etc.

[0061] In summary, the present utility model can simultaneously detect the printing surface and the back surface quality of printed products, greatly improving the overall quality of the finished products. It has a fast detection speed and high detection efficiency, and is particularly suitable for the detection requirements of printed products with high requirements for back surface quality. Moreover, the present utility model can also detect the quality of corrugated cartons in a folded state with a large thickness and non-bendable. In particular, it can remove unqualified products after detection, separately collect the unqualified products, and stack and collect the qualified products.

[0062] Although the principle of the present utility model has been described in detail above in combination with the preferred embodiments, those skilled in the art should understand that the above embodiments are only explanations of the schematic implementation modes of the present utility model and do not limit the scope of the present utility model. The details in the embodiments do not constitute a limitation on the scope of the present utility model. Without departing from the spirit and scope of the present utility model, any obvious changes such as equivalent transformations and simple replacements based on the technical solution of the present utility model fall within the protection scope of the present utility model.

Claims

1. A quality inspection machine for folding cartons, characterized in that, It includes a sheet feeding part, a pre-inspection conveying part, an inspection part, a post-inspection conveying part, a rejection part, a post-rejection conveying part, and a stacking part arranged in sequence from front to back, and a waste horizontal discharging part arranged below the post-rejection conveying part; The inspection part includes a front inspection system and a back inspection system; The front inspection system includes a front strip light source and a front inspection camera; the front strip light source is arranged above the gap between the pre-inspection conveying part and the post-inspection conveying part, and the front inspection camera is arranged at the rear upper part of the front strip light source and can receive the light emitted by the front strip light source and reflected back by the front of the carton to be inspected; The back inspection system includes a back strip light source, a back reflector, and a back inspection camera; the back strip light source is arranged below the gap between the pre-inspection conveying part and the post-inspection conveying part; the back reflector is arranged at the rear lower part of the back strip light source; the back inspection camera is arranged behind the back reflector and can receive the light emitted by the back strip light source and reflected back in sequence by the back of the carton to be inspected and the back reflector; The rejection part is mainly composed of a rotatable conveyor belt mechanism; when transporting the cartons qualified by the inspection part, the conveyor belt mechanism is in a horizontal state for transporting the cartons to the post-rejection conveying part; when transporting the cartons unqualified by the inspection part, the conveyor belt mechanism is in a state of inclining backward and downward for transporting the cartons to the waste horizontal discharging part.

2. The quality inspection machine for folding cartons according to claim 1, characterized in that, The front inspection system further includes a second connecting piece and two third connecting pieces; the third connecting pieces are placed vertically, with a cylindrical hole provided in the upper part thereof, and a setscrew threaded hole radially arranged in the cylindrical hole; the second connecting piece is placed horizontally perpendicular to the conveying direction, with a front strip light source installed on its side, and the cylindrical shaft heads provided at both ends thereof are respectively installed in the cylindrical holes of the corresponding third connecting pieces and can rotate in the cylindrical holes, so as to adjust the angle of the front strip light source; a long strip-shaped through hole is provided in the lower part of the third connecting piece, and the third connecting piece is installed on the frame of this quality inspection machine through the long strip-shaped through hole, so as to adjust the height of the front strip light source.

3. A quality inspection machine for folding cartons according to claim 1 or 2, characterized in that, The front inspection system further includes an upper cover, a cross beam, four first connecting pieces, a transverse sliding rail structure, a vertical sliding rail structure, and a front camera frame; the upper cover is installed at the rear of the pre-inspection conveying part and the front of the post-inspection conveying part; the cross beam is arranged horizontally along the conveying direction, and the left and right sides at both ends are respectively installed on the inner wall of the upper cover through a first connecting piece; the transverse sliding rail structure is installed on the cross beam along the conveying direction; the vertical sliding rail structure is installed vertically on the transverse sliding rail structure; the front camera frame is installed on the vertical sliding rail structure, and the front inspection camera is installed on the front camera frame.

4. The quality inspection machine for folding cartons according to claim 3, characterized in that, The front inspection system further includes four front shock absorbers; each first connecting piece is fixed on the upper cover through a front shock absorber.

5. The quality inspection machine for a folding carton according to claim 1, wherein The back detection system further includes a fifth connecting member and two fourth connecting members; the fourth connecting members are placed vertically, with a cylindrical hole provided in the upper part thereof, and a setscrew threaded hole arranged radially in the cylindrical hole; the fifth connecting member is placed horizontally perpendicular to the conveying direction, with a back strip light source mounted on its side surface, and cylindrical shaft heads provided at both ends thereof are respectively mounted in the cylindrical holes of the corresponding fourth connecting members and can rotate in the cylindrical holes, so as to adjust the angle of the back strip light source; a long strip-shaped through hole is provided in the lower part of the fourth connecting member, and the fourth connecting member is mounted on the frame of this quality inspection machine through the long strip-shaped through hole, so as to adjust the height of the back strip light source.

6. The quality inspection machine for a folding carton according to claim 1 or 5, characterized in that, The back detection system further includes a second fixing member and two first fixing members; the second fixing member is placed horizontally perpendicular to the conveying direction, with a reflecting mirror mounted on its side surface, and both ends thereof are respectively connected to one end of the corresponding first fixing member; the other end of the first fixing member is connected to the corresponding long strip-shaped through hole on the frame of this quality inspection machine through a screw, so as to adjust the height and angle of the reflecting mirror.

7. The quality inspection machine for folding cartons according to claim 1 or 5, characterized in that, The back detection system further includes a connecting beam, a fixing frame, a slide rail structure, a slide rail structure, and a back camera frame; the connecting beam is placed perpendicular to the conveying direction, and both ends thereof are respectively mounted on both sides of the frame through a fixing frame; the slide rail structure is placed along the conveying direction and is mounted on the connecting beam; the back camera frame is mounted on the slide rail structure, and a back detection camera is mounted on the slide rail structure.

8. The quality inspection machine for a folding carton according to claim 7, characterized in that, The back detection system further includes four back shock absorbers; each fixing frame is fixed on both sides of the frame through a back shock absorber.

9. The quality inspection machine for folding cartons according to claim 1, wherein, The conveying belt mechanism of the waste rejection part includes a driving roller, two fixed guide plate structures, two waste rejection rotating arm structures, two cylinder structures, two conveyor belts, and two paper pressing wheel structures; the driving roller is placed horizontally perpendicular to the conveying direction; the two fixed guide plate structures are mounted behind and above the driving roller and are placed side by side along the conveying direction; the two waste rejection rotating arm structures are mounted above the corresponding fixed guide plate structures and are placed side by side, the front end of each waste rejection rotating arm structure is connected to the front end of the corresponding fixed guide plate structure through a rotating shaft, and the rear end is connected to the frame below the rear end of the corresponding fixed guide plate structure through a cylinder structure, and the cylinder structure can drive the waste rejection rotating arm structure to rotate around the rotating shaft as the central axis; the two conveyor belts respectively surround the driving roller, the driving wheels at the front ends of the corresponding fixed guide plate structures, the driving wheels at the rear ends of the corresponding waste rejection rotating arm structures, and the rotating shaft; the two paper pressing wheel structures are mounted above the corresponding waste rejection rotating arm structures and are placed side by side.

10. The quality inspection machine for folding cartons according to claim 9, characterized in that, The upper dead point for the rotation of the two waste rejection rotating arm structures is the position where the conveyor belt is horizontal, and the lower dead point is the position where the conveyor belt is 4 - 6 degrees downward from the horizontal.

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