Automatic product inspection machine

Abstract

The invention discloses an automatic quality inspection machine, and belongs to the technical field of printed matter quality inspection equipment. Comprising a paper separating mechanism, a quality inspection mechanism, a waste removing mechanism, a stacking mechanism and a single product conveying mechanism, the paper separating mechanism, the quality inspection mechanism, the waste removing mechanism and the stacking mechanism are sequentially arranged in the conveying direction of the single product conveying mechanism, and the paper separating mechanism outputs printed matters stacked at the feeding end of the single product conveying mechanism one by one. The quality inspection mechanism inspects the printed matters output one by one, the waste rejecting mechanism rejects the unqualified printed matters, the stacking mechanism counts and stacks the printed matters qualified in quality inspection and then pushes out the printed matters, the single product conveying mechanism conveys single printed matters to the quality inspection mechanism, the waste rejecting mechanism and the stacking mechanism, and the single product conveying mechanism conveys the single printed matters to the quality inspection mechanism, the waste rejecting mechanism and the stacking mechanism. The device further comprises a three-axis transfer mechanism and a stacked product conveying mechanism. Efficient collection of printed matters after quality inspection and stacking can be achieved, workers do not need to run from two ends, multiple workers are not needed, and economic benefits are improved.

Description

Technical Field

[0001] The invention relates to an automatic product inspection machine, belonging to the technical field of printed product quality inspection equipment. Background Art

[0002] After printing, the quality of printed materials needs to be checked to see if there are any printing defects such as missing characters, misregistration, and color difference. Manual inspection is prone to visual fatigue and false detection or missed detection, and the labor cost is high. With the development of computer science, in order to improve inspection efficiency and reduce false detection rate, people have invented automatic inspection machines based on image recognition technology. This inspection machine forms an image of the printed material by photographing, and then processes and recognizes the image through a computer to efficiently and accurately inspect the printed material. The automatic inspection machine can effectively detect products with printing defects, and has played an increasingly important role in the printing and packaging industry, and is of great significance in guiding the production process of printed products.

[0003] However, when the existing printed product inspection machine is performing inspection work, the product is usually placed on the transmission belt for transportation. Generally, the inspection machine needs to set up two loading and unloading places at both ends, and the distance between the two places is relatively far, which requires the staff to walk repeatedly between the loading and unloading places, wasting time and affecting work efficiency. There is another situation: after the printed products are inspected and the defective products are eliminated, the qualified printed products are uniformly collected and stacked, and sent to the discharge port platform. After arriving at the discharge port platform, they stay on it, and the staff need to unload them in time. When the staff leaves the workstation and has no time to unload, multiple stacks of finished products will be continuously output from the back, pushing the front finished products forward, causing the neatly stacked printed products in front to be pushed down or dropped. Therefore, it is best for the staff to squat at the workstation. When the distance between the loading and unloading places of the inspection machine is relatively far, it is necessary to equip at least one staff member at the loading and unloading places of the inspection machine, which wastes manpower.

[0004] The Chinese utility model patent application number 2022230629741 discloses a high-efficiency automatic quality inspection machine. After the product on the first transmission belt of the utility model passes through the first quality inspection machine, the horizontal round rod rotates inward to drive the product to completely enter the two adjacent clamping blocks. The output end of the third servo motor drives the clamping blocks to drive the product to rotate until it rotates to the other end of the square through hole. At the same time, the bottom surface of the product in contact with the transmission belt is flipped to face upward. The flipped product slides out due to the resistance of the anti-slip groove and falls on the second transmission belt. It is then inspected by the second quality inspection machine. During this period, no manpower is required to flip the product. The first frame, the second frame and the flipping mechanism are arranged in a U shape. The transmission directions of the first transmission belt and the second transmission belt are opposite, so that the loading and unloading of the product are on the adjacent same side, and the staff does not need to walk repeatedly at the loading and unloading locations. First, the patent requires an updated design of the entire inspection machine, and it is not possible to modify the existing inspection machine, which results in a high cost investment. Second, although the patent technology allows the loading and unloading of the inspection machine to be adjacent to each other on the same side, its entire transmission process is for single unstacking printed products, which is difficult to apply to stacked printed products. This application is for existing inspection machines, specifically the FS500M-P3 inspection machine of Beijing Zhengtu Xinshi Technology Co., Ltd. (such as Figure 1 Technical improvements made (as shown). Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] The technical problem to be solved by the present invention is to solve the problem that the distance between the loading and unloading points of the existing quality inspection machine is far, which makes it inconvenient to quickly collect the piles of printed materials stacked after passing the quality inspection.

[0007] (II) Technical solution

[0008] In order to solve the above technical problems, the present invention provides an automatic quality inspection machine, including a paper separation mechanism, a quality inspection mechanism, a waste rejection mechanism, a stacking mechanism and a single product conveying mechanism, wherein the paper separation mechanism, the quality inspection mechanism, the waste rejection mechanism and the stacking mechanism are arranged in sequence along the conveying direction of the single product conveying mechanism, the paper separation mechanism outputs the printed materials stacked at the feeding end of the single product conveying mechanism one by one, the quality inspection mechanism inspects the printed materials output one by one, the waste rejection mechanism rejects unqualified printed materials, the stacking mechanism counts, stacks and then pushes out the printed materials that pass the quality inspection, and the single product conveying mechanism transmits individual printed materials to the quality inspection mechanism, the waste rejection mechanism and the stacking mechanism.

[0009] The automatic product inspection machine provided by the present invention further includes a three-axis transfer mechanism and a stacked product conveying mechanism. The stacked product conveying mechanism is arranged in parallel with the single product conveying mechanism, and the conveying directions of the two are opposite. The three-axis transfer mechanism is arranged at the discharge end of the single product conveying mechanism. The stacked product conveying mechanism, the three-axis transfer mechanism and the single product conveying mechanism form a U-shaped structure. The three-axis transfer mechanism translates the stacked products pushed out by the stacking mechanism to the stacked product conveying mechanism, and then the stacked product conveying mechanism conveys them to the feeding end side of the single product conveying mechanism.

[0010] Furthermore, the stacked product conveying mechanism includes a slide rail and a toggle mechanism, wherein the two slide rails are arranged in parallel on both sides of the toggle mechanism. When in operation, the stacked printed materials are placed on the two slide rails, and then the toggle mechanism pushes the stacked printed materials to move.

[0011] Furthermore, the slide rail comprises a track and an auxiliary sliding shaft, the track is provided with a receiving groove, dense auxiliary sliding shafts are arranged in the receiving groove, the auxiliary sliding shafts are rotatably arranged, and the upper side of the auxiliary sliding shafts exceeds the upper side of the track.

[0012] Furthermore, the toggle mechanism adopts a conveyor belt structure, which includes a frame and a conveyor belt arranged in the middle of the frame, and multiple toggle plates are arranged in the gaps on the conveyor belt. The two slide rails are arranged in parallel on the frame on both sides of the conveyor belt and are arranged higher than the conveyor belt. When working, the stacked printed materials are placed on the two slide rails, and then the stacked printed materials are pushed to move by the toggle plates.

[0013] Furthermore, the stacked product conveying mechanism also includes a docking plate, and the docking plate is arranged at one end of the slide rail located at the discharge end of the stacked product conveying mechanism.

[0014] Furthermore, one end of the slide rail located at the discharge end of the stacked product conveying mechanism extends beyond the toggle mechanism, and both ends of the docking plate are respectively fixed to the end of one of the slide rails of the stacked product conveying mechanism.

[0015] Furthermore, the distance that the slide rail exceeds the toggle mechanism is not less than the sum of the height of the toggle plate and the width of the printed matter conveyed by the stacked product conveying mechanism.

[0016] Furthermore, the single product conveying mechanism adopts a conveyor belt.

[0017] Furthermore, the three-axis transfer mechanism includes a horizontal longitudinal displacement unit, a horizontal lateral displacement unit, a vertical displacement unit and a fork, the horizontal longitudinal displacement unit is provided with a horizontal lateral displacement unit, the horizontal lateral displacement unit is provided with a vertical displacement unit, and the vertical displacement unit is provided with a fork.

[0018] Furthermore, the horizontal longitudinal displacement unit, the horizontal lateral displacement unit and the vertical displacement unit adopt linear modules and / or hydraulic mechanisms.

[0019] (III) Beneficial effects

[0020] The above technical solution of the present invention has the following advantages:

[0021] The present invention can be modified on the basis of an existing quality inspection machine by setting up a three-axis transfer mechanism and a stacked product conveying mechanism, without the need to redesign the entire quality inspection machine, and the cost investment is relatively low; secondly, the stacked product conveying mechanism, the three-axis transfer mechanism and the single product conveying mechanism of the present invention form a U-shaped structure, and the three-axis transfer mechanism translates the stacked products pushed out by the stacking mechanism to the stacked product conveying mechanism, and then the stacked product conveying mechanism conveys them to the feeding end side of the single product conveying mechanism. The staff does not need to walk repeatedly at the loading and unloading places, and it is aimed at conveying multiple stacked printed materials, with high efficiency and easy use.

[0022] In addition to the technical problems solved by the present invention, the technical features of the technical solutions constituted by the present invention, and the advantages brought about by the technical features of these technical solutions described above, other technical features of the present invention and the advantages brought about by these technical features will be further explained in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 It is a schematic diagram of a quality inspection machine in the prior art.

[0026] Figure 3 It is a schematic diagram of the three-axis transfer mechanism of the present invention.

[0027] Figure 4 It is a schematic diagram of the stacking product conveying mechanism of the present invention.

[0028] Figure 5 It is a schematic diagram of the slide rail of the present invention.

[0029] In the figure: 1. paper separation mechanism; 2. quality inspection mechanism; 3. waste rejection mechanism; 4. stacking mechanism; 5. single product conveying mechanism; 6. three-axis transfer mechanism; 7. stacked product conveying mechanism; 8. slide rail; 9. toggle mechanism; 10. stacked printed materials; 11. track; 12. slide shaft; 13. frame; 14. conveyor belt; 15. toggle plate; 16. docking plate; 17. horizontal longitudinal displacement unit; 18. horizontal lateral displacement unit; 19. vertical displacement unit; 20. fork. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution 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 part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Example 1

[0033] like Figure 1 As shown, an automatic quality inspection machine includes a paper separation mechanism 1, a quality inspection mechanism 2, a waste rejection mechanism 3, a stacking mechanism 4 and a single product conveying mechanism 5. The paper separation mechanism 1, the quality inspection mechanism 2, the waste rejection mechanism 3 and the stacking mechanism 4 are arranged in sequence along the conveying direction of the single product conveying mechanism 5. The paper separation mechanism 1 outputs the printed materials stacked at the feeding end of the single product conveying mechanism 5 one by one, the quality inspection mechanism 2 checks the printed materials output one by one, the waste rejection mechanism 3 rejects unqualified printed materials, the stacking mechanism 4 counts, stacks and pushes out the printed materials that have passed the quality inspection, and the single product conveying mechanism 5 transmits individual printed materials to the quality inspection mechanism 2, the waste rejection mechanism 3 and the stacking mechanism 4. All of the above are prior arts, such as the quality inspection machine model FS500M-P3 of Beijing Zhengtu Xinshi Technology Co., Ltd. (such as Figure 2 As shown), no further elaboration is given here.

[0034] The automatic product inspection machine provided in this embodiment further includes a three-axis transfer mechanism 6 and a stacked product conveying mechanism 7. The stacked product conveying mechanism 7 is arranged in parallel with the single product conveying mechanism 5, and the conveying directions of the two are opposite. The three-axis transfer mechanism 6 is arranged at the discharge end of the single product conveying mechanism 5. The stacked product conveying mechanism 7, the three-axis transfer mechanism 6 and the single product conveying mechanism 5 form a U-shaped structure. The three-axis transfer mechanism 6 translates the stacked products pushed out by the stacking mechanism 4 to the stacked product conveying mechanism 7, and then the stacked product conveying mechanism 7 conveys them to the feeding end side of the single product conveying mechanism 5. The loading and unloading of printed products are placed in adjacent positions, and the staff does not need to walk repeatedly at the loading and unloading locations, thereby improving the efficiency of collecting the printed products 10 that have passed the inspection and are stacked.

[0035] Example 2

[0036] This embodiment is based on the embodiment 1, and further refines the stacked product conveying mechanism 7, specifically:

[0037] The stacked product conveying mechanism 7 includes a slide rail 8 and a toggle mechanism 9. The two slide rails 8 are arranged in parallel on both sides of the toggle mechanism 9. When working, the stacked printed materials 10 are placed on the two slide rails 8, and then the toggle mechanism 9 pushes the stacked printed materials 10 to move, that is, the stacked product conveying mechanism 7 conveys the stacked printed materials as units.

[0038] Example 3

[0039] This embodiment is based on the embodiment 2, and further optimizes and refines the structure of the slide rail 8, specifically:

[0040] like Figure 5 As shown, the slide rail 8 includes a track 11 and an auxiliary sliding shaft 12, and the track 11 is provided with a receiving groove. Specifically, the track 11 adopts a rectangular tube structure with an upper opening, and dense auxiliary sliding shafts 12 are arranged in the receiving groove. The auxiliary sliding shafts 12 are arranged perpendicular to the length direction of the track 11 and are rotatable, that is, the auxiliary sliding shafts 12 are installed in the receiving groove and can rotate. The upper side of the auxiliary sliding shaft 12 exceeds the upper side of the track 11, and is used to support the stacked printed materials 10.

[0041] Example 4

[0042] This embodiment is based on the embodiment 3, and further optimizes and refines the stacked product conveying mechanism 7, specifically:

[0043] In this embodiment, the shifting mechanism 9 adopts a conveyor belt structure, such as Figure 4As shown, it includes a frame 13 and a conveyor belt 14 arranged in the middle of the frame 13, and a plurality of toggle plates 15 are arranged in the gap on the conveyor belt 14. Two slide rails 8 are arranged in parallel on the frame 13 on both sides of the conveyor belt 14, and are arranged higher than the conveyor belt 14. When working, the stacked printed materials 10 are placed on the two slide rails 8, and then the stacked printed materials 10 are pushed to move by the toggle plates 15. It should be noted that the height of the toggle plates 15 is not lower than the height of the stacked printed materials 10 on the slide rails 8, so as to prevent the printed materials at the upper end of the stacked printed materials from being separated in the opposite direction under the action of inertia during the pushing process, especially in the process from static to sliding. Due to the use of the slide rail 8 structure and the small weight of the printed materials themselves, it does not require too much force to push the stacked printed materials 10 to move, and the toggle plates 15 (i.e., the partitions on the conveyor belt in the prior art, but with a higher height) provided on the conveyor belt 14 are sufficient to drive them to be transported. In addition, the toggle plate 15 may also adopt a lead screw structure to drive its reciprocating motion.

[0044] Example 5

[0045] This embodiment is based on the embodiment 4, and further optimizes and refines the stacked product conveying mechanism 7, specifically:

[0046] The stacked product conveying mechanism 7 further includes a stop plate 16, which is disposed at one end of the slide rail 8 located at the discharge end of the stacked product conveying mechanism 7. When the stacked printed matter is pushed to the discharge end of the stacked product conveying mechanism 7 by the shifting plate 15, the stop plate 16 makes the stacked printed matter stop neatly at one side of the stop plate 16 to prevent the stacked printed matter from being scattered, so that the staff can quickly take out the stacked printed matter and pack it.

[0047] Example 6

[0048] This embodiment is based on the embodiment 5, and further optimizes and refines the stacked product conveying mechanism 7, specifically:

[0049] One end of the slide rail 8 located at the discharge end of the stacked product conveying mechanism 7 is beyond the toggle mechanism 9, and both ends of the stop plate 16 are respectively fixed to the ends of one of the slide rails 8 of the stacked product conveying mechanism 7. With this structural arrangement, after the stacked printed matter is pushed to the discharge end of the stacked product conveying mechanism 7 by the toggle plate 15, the printed matter continues to slide forward a distance under the action of inertia, and then stops neatly at the stop plate 16. At this time, the toggle plate 15 is also taken away from the stacked printed matter under the action of the transmission belt, so that it no longer continues to push the stacked printed matter forward, but pushes the subsequent printed matter.

[0050] In this embodiment, the distance that the slide rail 8 exceeds the toggle mechanism 9 is not less than the sum of the height of the toggle plate 15 and the width of the printed matter conveyed by the stacked product conveying mechanism 7, so that the toggle plate 15 that pushes the printed matter can move smoothly downward through the gap between the printed matter parked on the docking plate 16 and the conveyor belt 14.

[0051] Example 7

[0052] This embodiment is based on the embodiment 6, and further optimizes and refines the single product conveying mechanism 5, specifically:

[0053] In this embodiment, the single product conveying mechanism 5 is limited to adopt a conveyor belt, which is easy to use and has a simple and reliable structure.

[0054] Example 8

[0055] This embodiment is based on the embodiment 7, and further optimizes and refines the three-axis transfer mechanism 6, specifically:

[0056] like Figure 3 As shown, the three-axis transfer mechanism 6 includes a horizontal longitudinal displacement unit 17, a horizontal transverse displacement unit 18, a vertical displacement unit 19 and a fork 20. The horizontal longitudinal displacement unit 17 is provided with a horizontal transverse displacement unit 18, the horizontal transverse displacement unit 18 is provided with a vertical displacement unit 19, and the vertical displacement unit 19 is provided with a fork 20. When working, the fork 20 translates the stacked printed matter in cooperation with the horizontal longitudinal displacement unit 17, the horizontal transverse displacement unit 18 and the vertical displacement unit 19, so that the stacked printed matter is pushed out by the stacking mechanism 4 and then translated to the stacked product conveying mechanism 7.

[0057] In this embodiment, the horizontal longitudinal displacement unit 17, the horizontal lateral displacement unit 18 and the vertical displacement unit 19 are linear modules and / or hydraulic mechanisms. The specific control method thereof can be realized by using the existing technology and will not be described in detail here.

[0058] Working process: When using the present invention, the printed materials to be inspected are stacked in piles at the paper separation mechanism 1, and the paper separation mechanism 1 outputs the printed materials to be inspected one by one. The inspection mechanism 2 checks the outputted printed materials one by one, and the waste rejection mechanism 3 rejects the unqualified printed materials. The stacking mechanism 4 counts, stacks and pushes out the printed materials that have passed the inspection, and completes the automatic inspection. Then the vertical displacement unit 19 adjusts the fork 20 to a position lower than the printed material pile at the discharge port of the stacking mechanism 4, and then the horizontal lateral displacement unit 18 drives the vertical displacement unit 19 and the fork 20 to align with the printed material pile, and then the horizontal longitudinal displacement unit 17 drives the horizontal lateral displacement unit 18 and the vertical displacement unit 19 to move close to the printed material pile until the fork 20 enters the lower side of the printed material pile, and then the fork 20 lifts the printed material pile upward under the action of the vertical displacement unit 19, and then the horizontal lateral displacement unit 18 drives the vertical displacement unit 19 to move horizontally until the fork 20 moves to the stacked products. Above the conveying mechanism 7, the fork 20 lowers the pile of printed materials onto the slide rail 8 under the action of the vertical displacement unit 19, and then moves away from the stacked product conveying mechanism 7 under the action of the horizontal longitudinal displacement unit 17. As the conveyor belt 14 of the stacked product conveying mechanism 7 moves, one of the toggle plates 15 thereon moves to the rear side of the printed material pile and pushes it forward until it is conveyed to the front end of the stacked product conveying mechanism 7. Then, the printed material pile stops on the inner side of the docking plate 16 under the action of inertia, and the corresponding toggle plate 15 enters under the conveyor belt 14. The staff can take away the printed material pile at the docking plate 16.

[0059] The present invention not only has the function of quality inspection of printed products, but also can transport and sort the printed products 10 that have passed the inspection and are stacked for easy collection. The printed products are neatly stacked, and there is no need to manually sort and align a pile of spiral printed products. The input and output are in adjacent positions, and the staff can quickly collect the printed products after quality inspection and stack them in the receiving box, and stack them neatly, which greatly improves production efficiency and reduces the work intensity of the staff.

[0060] In addition, in the description of the invention, unless otherwise specified, the terms "multiple", "multiple roots", "multiple groups" are used to mean two or more than two, and "several", "several roots", "several groups" are used to mean one or more than one. In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0061] The specific implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above implementation modes, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. An automatic quality inspection machine, comprising a paper separation mechanism, a quality inspection mechanism, a waste rejection mechanism, a stacking mechanism and a single product conveying mechanism, wherein the paper separation mechanism, the quality inspection mechanism, the waste rejection mechanism and the stacking mechanism are sequentially arranged along the conveying direction of the single product conveying mechanism, the paper separation mechanism outputs the printed products stacked at the feeding end of the single product conveying mechanism one by one, the quality inspection mechanism inspects the printed products output one by one, the waste rejection mechanism rejects unqualified printed products, the stacking mechanism counts, stacks and pushes out the printed products that have passed the quality inspection, and the single product conveying mechanism transmits a single printed product to the quality inspection mechanism, the waste rejection mechanism and the stacking mechanism, characterized in that: It also includes a three-axis transfer mechanism and a stacked product conveying mechanism; The stacked product conveying mechanism is arranged in parallel with the single product conveying mechanism, and the conveying directions of the two are opposite. The three-axis transfer mechanism is arranged at the discharge end of the single product conveying mechanism. The stacked product conveying mechanism, the three-axis transfer mechanism and the single product conveying mechanism form a U-shaped structure. The three-axis transfer mechanism translates the stacked products pushed out by the stacking mechanism to the stacked product conveying mechanism, and then the stacked product conveying mechanism conveys them to the feed end side of the single product conveying mechanism.

2. The automatic product inspection machine according to claim 1, characterized in that: The stacked product conveying mechanism includes a slide rail and a toggle mechanism. The two slide rails are arranged in parallel on both sides of the toggle mechanism. When working, the stacked printed products are placed on the two slide rails, and then the toggle mechanism pushes the stacked printed products to move.

3. The automatic product inspection machine according to claim 2, characterized in that: The slide rail comprises a track and an auxiliary sliding shaft. The track is provided with a receiving groove. The auxiliary sliding shafts are densely arranged in the receiving groove. The auxiliary sliding shafts are rotatably arranged, and the upper side of the auxiliary sliding shafts exceeds the upper side of the track.

4. The automatic product inspection machine according to claim 3, characterized in that: The toggle mechanism adopts a conveyor belt structure, which includes a frame and a conveyor belt arranged in the middle of the frame. A plurality of toggle plates are arranged in the gaps on the conveyor belt. The two slide rails are arranged in parallel on the frame on both sides of the conveyor belt and are arranged higher than the conveyor belt. When working, the stacked printed materials are placed on the two slide rails, and then the stacked printed materials are pushed to move by the toggle plates.

5. The automatic product inspection machine according to claim 4, characterized in that: The stacked product conveying mechanism further comprises a docking plate, and the docking plate is arranged at one end of the slide rail located at the discharge end of the stacked product conveying mechanism.

6. The automatic product inspection machine according to claim 5, characterized in that: One end of the slide rail located at the discharge end of the stacked product conveying mechanism is beyond the toggle mechanism, and both ends of the docking plate are respectively fixed to the end of one of the slide rails of the stacked product conveying mechanism.

7. The automatic product inspection machine according to claim 6, characterized in that: The distance that the slide rail exceeds the toggle mechanism is not less than the sum of the height of the toggle plate and the width of the printed matter conveyed by the stacked product conveying mechanism.

8. The automatic product inspection machine according to any one of claims 1 to 7, characterized in that: The single product conveying mechanism adopts a conveyor belt.

9. The automatic product inspection machine according to claim 8, characterized in that: The three-axis transfer mechanism includes a horizontal longitudinal displacement unit, a horizontal lateral displacement unit, a vertical displacement unit and a fork. The horizontal longitudinal displacement unit is provided with a horizontal lateral displacement unit, the horizontal lateral displacement unit is provided with a vertical displacement unit, and the vertical displacement unit is provided with a fork.

10. The automatic product inspection machine according to claim 9, characterized in that: The horizontal longitudinal displacement unit, the horizontal lateral displacement unit and the vertical displacement unit adopt linear modules and / or hydraulic mechanisms.

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