A corrugated box printing defect detection device

Abstract

The utility model discloses a corrugated carton printing defect detection device relates to carton printing detection technical field, including the conveyer belt of the power device is equipped in, the conveyer belt output direction one side is provided with the change direction rod, and the covering layer of conveyer belt is guided to produce the recessed area to the downward, and the output direction end of conveyer belt both sides is provided with telescopic pneumatic cylinder, and the output end rotation of telescopic pneumatic cylinder is provided with connecting rod, the output direction end top of conveyer belt is correspondingly provided with the support rod of fixed mounting of telescopic pneumatic cylinder, and the end of support rod and connecting rod is plane articulated with the supporting plate, and the recessed area that the surface of conveyer belt is probed into by change direction rod is formed to the rear side rotation of supporting plate with the connecting point of support rod as the center, and the recessed area that the front end of accurate probe of change direction rod is formed to make it, and the dynamic intercept path is formed. Utilize the space characteristic of conveyer belt recessed area, under the premise of not directly contacting conveyer belt, the substandard product is smoothly shunted from the main stream conveying path.

Description

Technical Field

[0001] This utility model relates to the field of cardboard box printing inspection technology, and in particular to a device for detecting printing defects in corrugated cardboard boxes. Background Technology

[0002] Printing inspection after the cardboard is printed is a crucial step in ensuring the final quality of the cardboard box. This stage of inspection is usually carried out at the back end of the printing press or in a separate quality control area. The purpose is to identify and correct printing defects in time before the cardboard is die-cut, folded, and glued into boxes, so as to avoid material waste and subsequent rework.

[0003] The current common inspection method is to use a high-speed camera to photograph the continuously moving cardboard on the conveyor belt surface, and use the detection system to identify whether the printing on the cardboard surface in the image is qualified. If a defective cardboard is found, an audible and visual alarm will be issued. At this time, the operator will then visually select the cardboard from the nearby batches and remove the defective ones. However, in actual use, if the audible and visual alarm issued by the defective cardboard as soon as it passes through the detection device does not directly alert the operator, the defective cardboard may escape detection, resulting in a number of defective cardboards being mixed in with the inspected cardboard, affecting the yield rate of the finished carton. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a corrugated cardboard box printing defect detection device, which solves the problem that defective cardboard boxes after passing through the detection device will be mixed with good products, requiring users to conduct further inspection and removal.

[0005] The technical solution of this utility model is as follows: a conveyor belt with an internal power device is provided, a deflector bar is provided on one side of the conveyor belt in the output direction, the deflector bar guides the cover layer of the conveyor belt to generate a downward concave area, mounting seats are symmetrically provided on both sides of the top of the conveyor belt, a rotating roller is provided between the two mounting seats, and the output end of the power device of the conveyor belt is connected to the rotating roller through a sprocket. Telescopic cylinders are provided on both sides of the output end of the conveyor belt. A connecting rod is rotatably provided at the output end of the telescopic cylinder. A support rod is fixedly installed at the top of the output end of the conveyor belt corresponding to the telescopic cylinder. A support plate is hinged to the end of the support rod and the connecting rod on the same plane. After the support plate rotates with the connection point with the support rod as the center, one side of the support plate extends into the recessed area formed by the deflector rod on the surface of the conveyor belt.

[0006] Furthermore, the recessed area formed by the deflector rod within the conveyor belt is triangular, with the short side of the recessed area facing the input direction of the conveyor belt and the long side facing the output direction of the conveyor belt, thus forming a sloping side facing the conveying direction of the conveyor belt. At the same time, since the cardboard itself has sufficient length, when passing through the recessed area formed by the deflector rod, the end is supported by the cardboard itself and will not enter the recessed area. Even if the cardboard bends into the recessed area, it can still contact the sloping side and continue to move without affecting the movement of the cardboard.

[0007] Furthermore, a gap is left between the rotating roller and the cover layer of the conveyor belt. The width of this gap is adapted to the thickness of the cardboard, allowing the rotating roller to contact the cardboard and assist the cardboard in moving on the surface of the conveyor belt.

[0008] Furthermore, the telescopic cylinder is electrically connected to the processing system within the detection device, and the output end of the telescopic cylinder faces the output direction of the conveyor belt, enabling the detection device to send an electrical signal to the telescopic cylinder to extend its output end outward from the conveyor belt.

[0009] Furthermore, the width of the pallet is adapted to the width of the conveyor belt cover layer. The side of the pallet closest to the conveyor belt is the front section, and the other side is the rear section. The connection points between the pallet and the support rod and the connecting rod are all located on the front section side. The pallet has protruding fins on both sides that are connected to the connecting rod, so that the pallet can move close to the surface of the conveyor belt without being obstructed, while having sufficient installation area on the surface of the pallet.

[0010] Furthermore, the support plate remains horizontal when the support rod and connecting rod are in a parallel state.

[0011] Furthermore, the end surface of the pallet facing the conveyor belt is provided with a smooth anti-friction coating.

[0012] The beneficial effects of this utility model are as follows: 1. This utility model uses a telescopic cylinder to extend a connecting rod, which drives the pallet to rotate, allowing its front end to precisely penetrate the recessed area formed by the deflector rod, creating a dynamic interception path. Utilizing the spatial characteristics of the conveyor belt's recessed area, defective products are smoothly diverted from the main conveyor path without direct contact with the conveyor belt.

[0013] 2. This utility model features a pallet that automatically returns to a horizontal position after intercepting defective products. A parallel support structure of support rods and connecting rods stably lifts the defective products above the conveyor belt, creating a visible display station. This design allows operators to directly retrieve defective products without bending over or reaching inside the equipment, significantly reducing manual intervention time and labor intensity, while also preventing defective products from flowing back and disrupting the normal production process. Attached Figure Description

[0014] Figure 1This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the rotating roller structure of this utility model; Figure 3 This is a schematic diagram of the reversing rod structure of this utility model; Figure 4 This is a schematic diagram of the pallet structure of this utility model; Figure 5 This is a schematic diagram of the tray tilted in this utility model.

[0015] Reference numerals: 1. Conveyor belt; 2. Directional rod; 3. Mounting base; 4. Rotating roller; 5. Telescopic cylinder; 6. Connecting rod; 7. Support rod; 8. Pallet. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] like Figure 1-5 As shown, a corrugated cardboard box printing defect detection device includes a conveyor belt 1 with an internal power unit. A deflector bar 2 is provided on one side of the conveyor belt 1 in the output direction. The recessed area formed by the deflector bar 2 in the conveyor belt 1 is triangular, wherein the short side of the recessed area faces the input direction of the conveyor belt 1 and the long side faces the output direction of the conveyor belt 1, so that the recessed area has a sloping side facing the conveying direction of the conveyor belt 1. At the same time, since the cardboard itself has sufficient length, when passing through the recessed area formed by the deflector bar 2, the end is supported by the cardboard itself and will not enter the recessed area. Even if the cardboard bends into the recessed area, it can still contact the sloping side and continue to move without affecting the movement of the cardboard. The deflector rod 2 guides the cover layer of the conveyor belt 1 to create a downward concave area. Mounting seats 3 are symmetrically arranged on both sides of the top of the conveyor belt 1. A rotating roller 4 is arranged between the two mounting seats 3. The output end of the power unit of the conveyor belt 1 is connected to the rotating roller 4 through a sprocket. A gap is left between the rotating roller 4 and the cover layer of the conveyor belt 1. The width of this gap is adapted to the thickness of the cardboard. The rotating roller 4 can contact the cardboard and assist the cardboard to move on the surface of the conveyor belt 1. Telescopic cylinders 5 are installed on both sides of the output end of the conveyor belt 1. The telescopic cylinders 5 are electrically connected to the processing system in the detection device. The output end of the telescopic cylinder 5 faces the output direction of the conveyor belt 1, so that the detection device can send an electrical signal to the telescopic cylinder 5 to make the output end of the telescopic cylinder 5 extend outward from the conveyor belt 1. The output end of the telescopic cylinder 5 is rotatably connected to a connecting rod 6. A support rod 7 is fixedly installed at the top of the output end of the conveyor belt 1 corresponding to the telescopic cylinder 5. The support rod 7 and the end of the connecting rod 6 are hinged together with a support plate 8. The width of the support plate 8 is adapted to the width of the cover layer of the conveyor belt 1. The side of the support plate 8 closest to the conveyor belt 1 is the front section and the other side is the rear section. The connection points of the support plate 8 with the support rod 7 and the connecting rod 6 are all located on the front section side. The two sides of the support plate 8 are provided with protruding fins that are connected to the connecting rod 6, so that the support plate 8 can move close to the surface of the conveyor belt 1 without being obstructed, and at the same time, there is a sufficient installation area on the surface of the support plate 8. After the pallet 8 rotates around the connection point with the support rod 7, one side of it extends into the recessed area formed by the deflector rod 2 on the surface of the conveyor belt 1. When the support rod 7 and the connecting rod 6 are in a parallel state, the support pallet 8 is kept horizontal. The end surface of the pallet 8 facing the conveyor belt 1 is provided with a smooth anti-friction coating.

[0018] Working principle of this utility model: Under normal transport conditions, the conveyor belt 1 with its built-in power unit drives the rotating roller 4 to run continuously via a sprocket. The deflector rod 2 guides the cover layer of the conveyor belt 1 to form a triangular concave area with the short side facing the input end and the long side facing the output end, so that the end of the cardboard is always supported by the plane of the conveyor belt 1 and passes smoothly. At this time, the telescopic cylinder 5 is in the retracted state, the connecting rod 6 and the support rod 7 remain parallel, and the pallet 8 is horizontally suspended above the conveyor belt 1 with a safety gap, so as not to interfere with the normal passage of cardboard.

[0019] When the detection device identifies a defective product, a trigger signal controls the telescopic cylinder 5 to extend rapidly. This extension, via the connecting rod 6, pushes the pallet 8 to rotate along the connection point of the support rod 7, causing its front end to penetrate the recessed area and form an oblique guide path. The defective product, driven by the conveyor belt 1 and the rotating roller 4, detaches from the surface of the conveyor belt 1 along the oblique surface of the pallet 8. Once the defective product is completely inside the pallet 8, the telescopic cylinder 5 retracts, driving the connecting rod 6 to reset. The pallet 8, supported by the support rod 7, returns to a horizontal state and lifts the defective product above the conveyor belt 1, forming a physically isolated display station. Operators can then directly retrieve the defective product, and the system immediately returns to standby mode. This process utilizes the spatial characteristics of the recessed area of ​​the deflector rod 2, the anti-interference structure of the pallet 8 fins, and the anti-friction coating design to achieve non-destructive interception and efficient sorting. Furthermore, the parallel self-locking characteristics of the support rod 7 and the connecting rod 6 ensure lifting stability, forming a closed-loop control process of "detection-interception-lifting-display."

[0020] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A corrugated cardboard box printing defect detection device, comprising a conveyor belt (1) with an internal power unit, a deflector bar (2) provided on one side of the conveyor belt (1) in the output direction, the deflector bar (2) guiding the cover layer of the conveyor belt (1) to generate a downward concave area, characterized in that: Mounting seats (3) are symmetrically arranged on both sides of the top of the conveyor belt (1), and a rotating roller (4) is arranged between the two mounting seats (3). The output end of the power device of the conveyor belt (1) is connected to the rotating roller (4) through a sprocket. Telescopic cylinders (5) are provided on both sides of the output direction end of the conveyor belt (1). A connecting rod (6) is rotatably provided at the output end of the telescopic cylinder (5). A support rod (7) is fixedly installed at the top of the output direction end of the conveyor belt (1) corresponding to the telescopic cylinder (5). A support plate (8) is hinged to the end of the support rod (7) and the connecting rod (6) on the same plane. After the support plate (8) rotates with the connection point with the support rod (7) as the center, one side of it protrudes into the recessed area formed by the deflector rod (2) on the surface of the conveyor belt (1).

2. The corrugated cardboard box printing defect detection device according to claim 1, characterized in that: The reversing rod (2) forms a triangular recessed area within the conveyor belt (1), with the short side of the recessed area facing the input direction of the conveyor belt (1) and the long side facing the output direction of the conveyor belt (1).

3. The corrugated cardboard box printing defect detection device according to claim 1, characterized in that: A gap is left between the rotating roller (4) and the cover layer of the conveyor belt (1), and the width of the gap is adapted to the thickness of the cardboard.

4. The corrugated cardboard box printing defect detection device according to claim 1, characterized in that: The telescopic cylinder (5) is electrically connected to the processing system in the detection device, and the output end of the telescopic cylinder (5) faces the output direction of the conveyor belt (1).

5. The corrugated cardboard box printing defect detection device according to claim 1, characterized in that: The width of the pallet (8) is adapted to the width of the cover layer of the conveyor belt (1). The side of the pallet (8) closest to the conveyor belt (1) is the front section and the other side is the rear section. The connection between the pallet (8) and the support rod (7) and the connecting rod (6) is located on the front section side. The pallet (8) has protruding fins on both sides that are connected to the connecting rod (6).

6. The corrugated cardboard box printing defect detection device according to claim 5, characterized in that: When the support rod (7) and the connecting rod (6) are in a parallel state, the support plate (8) remains in a horizontal state.

7. The corrugated cardboard box printing defect detection device according to claim 1, characterized in that: The pallet (8) has a smooth anti-friction coating on the end surface facing the conveyor belt (1).

Images