Adhesive binding line inspection device for publication printing

Abstract

The invention discloses an adhesive binding line inspection device for publication printing, and relates to the technical field of printing adhesive binding, the adhesive binding line inspection device comprises a conveying frame, a conveying channel extending in the length direction of the conveying frame is arranged on the conveying frame, a conveying belt used for conveying publications is arranged in the conveying channel, a first camera is installed at the tail of the conveying channel, and a second camera is installed at the tail of the conveying channel. Second cameras are installed on the two sides of the conveying channel correspondingly, fixed plates are installed on the inner walls of the opposite sides of the conveying frame correspondingly, the ends, away from the inner walls of the conveying frame, of the fixed plates are rotationally connected with movable plates, and a driving assembly for adjusting rotation of the movable plates is further installed on the conveying frame. Detection of the vertical end face and the horizontal side face is formed, hidden defects such as glue layer missing and bonding cracking are effectively captured, and the outflow risk of unqualified products is reduced.

Description

Technical Field

[0001] This invention relates to the field of printing and binding technology, specifically to a device for inspecting the binding thread of publications. Background Technology

[0002] In the field of publication printing and binding, full-dimensional quality inspection of perfect binding thread is the key to ensuring the durability of publications. The integrity and bonding stability of the adhesive layer on its sides, ends and binding joints also affect the user experience. The current mainstream automated inspection solution in the industry is a combination of conveyor belt and camera. This solution uses cameras placed above or on the side of the conveyor belt to collect and analyze images of publications during their movement.

[0003] However, in the existing inspection equipment, the publications can only maintain a fixed posture and move horizontally on the conveyor belt during the inspection process, and the position cannot be adjusted. As a result, the camera can only capture the designated surface facing the lens, making it difficult to cover key inspection areas such as the binding end face, the glue binding line on the other side, and the corner joints. These uninspected areas are prone to hiding hidden defects such as missing glue layer, adhesive cracks, and loose stitching, resulting in insufficient inspection coverage and an increased risk of unqualified products leaving the site.

[0004] In view of the above, this application is hereby submitted. Summary of the Invention

[0005] The purpose of this invention is to provide a device for inspecting perfect binding threads in publication printing, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides a perfect binding thread inspection device for publication printing, including a conveyor frame, a conveyor channel extending along its length on the conveyor frame, a conveyor belt for conveying publications inside the conveyor channel, a first camera installed at the end of the conveyor channel, and second cameras installed on both sides of the conveyor channel. Fixed plates are installed on the inner walls of opposite sides of the conveyor frame, and a movable plate is rotatably connected to the end of the fixed plate away from the inner wall of the conveyor frame. A drive assembly for adjusting the rotation of the movable plate is also installed on the conveyor frame.

[0007] Furthermore, two conveying rollers are rotatably mounted on the conveyor frame, one of which is located at the beginning of the conveying channel and the other at the end of the conveying channel. The conveyor belt is connected between the two conveying rollers. A conveyor motor is installed on the outer wall of the conveyor frame, and the drive end of the conveyor motor is connected to the conveying roller located at the end of the conveying channel.

[0008] Furthermore, the drive assembly includes a bidirectional lead screw rotatably mounted on the conveyor frame, a lead screw nut threadedly connected to the bidirectional lead screw, a connecting rod rotatably connected to the lead screw nut, and the end of the connecting rod away from the lead screw nut being hinged to a movable plate.

[0009] Furthermore, a drive motor is installed on the outer wall of the conveyor frame, and the drive end of the drive motor is connected to one end of a bidirectional lead screw.

[0010] Furthermore, both the movable plate and the nut are provided with connecting seats, and the connecting rod is connected to the movable plate and the nut respectively through the connecting seats.

[0011] Furthermore, a bracket is installed at the tail of the conveyor frame, and the first camera is fixedly mounted on the bracket.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention constrains the publication to be perpendicular to the conveyor belt by the cooperation of a fixed plate and a movable plate. A first camera fixed to the tail bracket of the conveyor frame completes the inspection of the binding end face. By utilizing the structural design that the length of the fixed plate and the movable plate is half that of the conveyor belt, the publication is allowed to naturally turn to a horizontal state under the action of gravity after being freed from the constraint during the conveying process. Then, a second camera on both sides of the conveying channel covers the binding lines on both sides to detect the vertical end face and the horizontal side face, effectively capturing hidden defects such as missing glue layer and adhesive cracks, and reducing the risk of unqualified products flowing out.

[0013] 2. This invention uses a drive motor to drive a bidirectional lead screw, which in turn drives the lead screw nut and connecting rod to achieve precise adjustment of the angle of the movable plate around the fixed plate, and can flexibly adapt to the vertical positioning requirements of publications of different thicknesses. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the left-side structure of the present invention; Figure 2 This is a schematic diagram of the right-side structure of the present invention; Figure 3 This is a side view of the structure of the present invention; Figure 4 This is a front view structural diagram of the present invention.

[0015] In the diagram: 1. Conveyor frame; 2. Conveyor roller; 3. Conveyor motor; 4. Conveyor belt; 5. First camera; 6. Second camera; 7. Fixed plate; 8. Movable plate; 9. Bidirectional lead screw; 10. Lead screw nut; 11. Drive motor; 12. Connecting rod. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figures 1-4 The present invention provides a technical solution: a perfect binding thread inspection device for publication printing, comprising a conveyor frame 1, a conveyor channel extending along its length on the conveyor frame 1, a conveyor belt 4 for conveying publications inside the conveyor channel, a first camera 5 installed at the end of the conveyor channel, and second cameras 6 installed on both sides of the conveyor channel. Fixed plates 7 are installed on the inner walls of opposite sides of the conveyor frame 1, and a movable plate 8 is rotatably connected to one end of the fixed plate 7 away from the inner wall of the conveyor frame 1. A drive assembly for adjusting the rotation of the movable plate 8 is also installed on the conveyor frame 1.

[0018] Specifically, the conveyor channel on the conveyor frame 1 provides a stable conveying path for the publications, and the conveyor belt 4 carries the publications to be inspected along the channel. The first camera 5 at the end of the conveyor channel and the second cameras 6 on both sides form a complementary detection layout of vertical end face and horizontal side face. The fixed plate 7 on the inner wall of the opposite side of the conveyor frame 1 provides fixed support, and the movable plate 8 cooperates with the fixed plate 7 to clamp the publications from both sides to ensure that they are perpendicular to the conveyor belt 4. The drive component can adjust the rotation angle of the movable plate 8 to adapt to the vertical positioning requirements of publications of different specifications. As the conveyor belt 4 conveys the publications, after they move beyond the constraint range of the fixed plate 7 and the movable plate 8, they naturally tilt to a horizontal state under the action of gravity, realizing the posture conversion from vertical to horizontal. At this time, the first camera 5 completes the detection of the binding end face of the publication in the vertical state, and the second camera 6 completes the detection of the glue binding lines on both sides of the publication in the horizontal state, forming full-dimensional coverage.

[0019] As a technical optimization of the present invention, two conveying rollers 2 are rotatably installed on the conveying frame 1, one of which is located at the beginning of the conveying channel and the other is located at the end of the conveying channel. The conveyor belt 4 is connected between the two conveying rollers 2. A conveying motor 3 is installed on the outer wall of the conveying frame 1, and the driving end of the conveying motor 3 is connected to the conveying roller 2 located at the end of the conveying channel.

[0020] Specifically, the two conveyor rollers 2 on the conveyor frame 1 correspond to the beginning and end of the conveying channel, respectively, and the conveyor belt 4 is connected between the two conveyor rollers 2. The conveyor motor 3 on the outer wall of the conveyor frame 1 drives the tail conveyor roller 2 to rotate. Through the friction between the conveyor roller 2 and the conveyor belt 4, the conveyor belt 4 is driven to rotate at a constant speed along the length of the conveying channel. This transmission method ensures that the vertical publication moves smoothly to the detection area of ​​the first camera 5 under the constraint of the fixed plate 7 and the movable plate 8. After the end face detection is completed, it continues to move at a constant speed until it is out of the constraint range, tilts smoothly to a horizontal state, and is then accurately conveyed to the detection area of ​​the second camera 6.

[0021] As a technical optimization of the present invention, the drive assembly includes a bidirectional lead screw 9 rotatably mounted on the conveyor frame 1, a lead screw nut 10 threadedly connected to the bidirectional lead screw 9, a connecting rod 12 rotatably connected to the lead screw nut 10, and the end of the connecting rod 12 away from the lead screw nut 10 is hinged to the movable plate 8.

[0022] Specifically, the bidirectional lead screw 9 is rotatably mounted on the conveyor frame 1, and the lead screw nut 10 is threadedly engaged with the bidirectional lead screw 9. The two ends of the connecting rod 12 are respectively connected to the lead screw nut 10 and the movable plate 8 by a rotatable connection. When the bidirectional lead screw 9 rotates, the lead screw nuts 10 on both sides move synchronously relative to each other or in opposite directions, and transmit thrust or pull through the connecting rod 12 to drive the movable plate 8 to rotate around the end of the fixed plate 7 away from the inner wall of the conveyor frame 1, thereby adjusting the included angle between the movable plate 8 and the fixed plate 7, realizing the clamping and positioning of publications of different thicknesses, and ensuring that they are always perpendicular to the conveyor belt 4.

[0023] As a technical optimization of the present invention, a drive motor 11 is installed on the outer side wall of the conveyor frame 1, and the drive end of the drive motor 11 is connected to one end of the bidirectional lead screw 9.

[0024] Specifically, the drive end of the drive motor 11 on the outer wall of the conveyor frame 1 is fixedly connected to one end of the bidirectional lead screw 9. The rotation direction of the bidirectional lead screw 9 is controlled by the forward and reverse rotation of the drive motor 11, which in turn drives the lead screw nut 10 to translate and the connecting rod 12 to drive, ultimately realizing the automatic adjustment of the rotation angle of the movable plate 8. Vertical positioning and adaptation of publications of different thicknesses can be completed without manual intervention.

[0025] As a technical optimization of the present invention, both the movable plate 8 and the nut 10 are provided with connecting seats, and the connecting rod 12 is connected to the movable plate 8 and the nut 10 respectively through the connecting seats.

[0026] Specifically, both the movable plate 8 and the lead screw nut 10 are equipped with connecting seats, and the connecting rod 12 forms a flexible rotatable connection with the movable plate 8 and the lead screw nut 10 respectively through the connecting seats. This structure ensures that when the bidirectional lead screw 9 drives the lead screw nut 10 to translate, the connecting rod 12 can adaptively adjust its angle, smoothly transmit power, drive the movable plate 8 to rotate smoothly, and avoid jamming or force concentration during the transmission process.

[0027] As a technical optimization of the present invention, a bracket is installed at the tail of the conveyor frame 1, and the first camera 5 is fixedly installed on the bracket.

[0028] Specifically, the bracket installed at the tail of the conveyor 1 provides stable support for the first camera 5, so that the first camera 5 is precisely fixed at a preset height and angle, ensuring that when the publication is in a vertical state and moves to the detection area, the first camera 5 can accurately align with the binding end face of the publication and clearly capture the image information of the binding line on the end face.

[0029] The specific working process of this device is as follows: Initial positioning and conveying preparation: First, the publication to be inspected is placed vertically on the conveyor belt 4 within the conveying channel of the conveyor frame 1. At this time, the fixed plate 7 and the movable plate 8 on opposite inner walls of the conveyor frame 1 are in an initial engagement state. The fixed plate 7 provides fixed support, and the movable plate 8 clamps the publication from both sides through a preset angle via a drive assembly, ensuring that the publication is always perpendicular to the surface of the conveyor belt 4. It should be noted that the length of the fixed plate 7 and the movable plate 8 is designed to be half the length of the conveyor belt 4. This structural design provides the basic conditions for subsequent changes in the posture of the publication. At the same time, the conveyor motor 3 on the outer wall of the conveyor frame 1 is in a ready-to-start state, and its drive end is connected to the conveyor roller 2 at the end of the conveying channel, providing power for the conveying action. Stable conveying and vertical surface detection start the conveyor motor 3, whose drive end drives the tail conveyor roller 2 to rotate. Since the conveyor belt 4 is connected between the two conveyor rollers 2 at the beginning and end of the conveying channel, the conveyor belt 4 is driven to run at a constant speed along the length of the conveying channel by the friction between the conveyor roller 2 and the conveyor belt 4. The vertically placed publication moves smoothly to the end of the conveying channel with the conveyor belt 4 under the constraint of the fixed plate 7 and the movable plate 8. When the publication moves to the detection range of the first camera 5, the first camera 5 installed on the tail bracket of the conveyor frame 1 is precisely aimed at the binding end face or key detection surface of the publication in the vertical state, and collects image information in real time to complete the preliminary detection of the core area of ​​the perfect binding line in the vertical posture. As the conveyor belt 4 continues to transport the publication, the gravity-driven attitude conversion gradually moves towards the end of the conveyor channel. When the moving distance exceeds the length range of the fixed plate 7 and the movable plate 8, the publication is completely freed from their clamping constraints. At this point, under the action of gravity, the vertical publication naturally tilts over and eventually transforms into a horizontal posture, lying flat on the conveyor belt 4. This achieves a powerless attitude conversion from vertical to horizontal. This conversion process requires no additional driving components and is completed solely through the structural length design and the coordination of gravity, ensuring a highly efficient and simple process. The publication, now in a horizontal position, continues to move with the conveyor belt 4 and enters the detection area of ​​the second cameras 6 on both sides of the conveyor channel. Since the publication is horizontal, the binding lines on both sides are fully exposed. The second cameras 6 simultaneously acquire image information of the binding lines on both sides of the publication, accurately capturing key indicators such as glue uniformity, stitch continuity, and adhesion stability. This complements the detection results of the first camera 5, achieving comprehensive detection of the binding line end faces and both sides of the publication. Adaptive adjustment to accommodate publications of different thicknesses: When inspecting publications of different specifications and thicknesses, the drive motor 11 on the outer wall of the conveyor frame 1 is activated. Its drive end drives the bidirectional lead screw 9, which is rotatably mounted on the conveyor frame 1, to rotate. Since the lead screw nut 10 is threadedly connected to the bidirectional lead screw 9, the rotation of the bidirectional lead screw 9 will drive the lead screw nuts 10 on both sides to move synchronously relative to each other or in opposite directions. Both the lead screw nut 10 and the movable plate 8 are provided with connecting seats. The connecting rod 12 is rotatably connected to the lead screw nut 10 and the movable plate 8 respectively through the connecting seats. Therefore, the displacement of the lead screw nut 10 will transmit thrust or pull through the connecting rod 12, driving the movable plate 8 to rotate around the end of the fixed plate 7 away from the inner wall of the conveyor frame 1, thereby adjusting the angle between the movable plate 8 and the fixed plate 7 to adapt to the vertical positioning requirements of publications of different thicknesses, ensuring that publications of various specifications can maintain a stable vertical posture in the initial stage of inspection.

[0030] The entire workflow achieves posture transformation without complex drive through the ingenious combination of mechanical structure design and gravity. With the precise layout of multiple cameras and adaptive adjustment structure, it efficiently completes the full-dimensional inspection of the perfect binding line of publications, taking into account the comprehensiveness of inspection, the simplicity of the process and the adaptability of specifications.

[0031] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A glue line inspection device for printed publications, comprising a conveyor frame (1), characterized in that: The conveying frame (1) is provided with a conveying channel extending along the length direction thereof, a conveying belt (4) for conveying publications is arranged inside the conveying channel, a first camera (5) is installed at the tail of the conveying channel, a second camera (6) is installed on both sides of the conveying channel, a fixing plate (7) is installed on the inner wall of the opposite side of the conveying frame (1), an active plate (8) is rotatably connected to the end of the fixing plate (7) away from the inner wall of the conveying frame (1), and a driving assembly for adjusting the rotation of the active plate (8) is further installed on the conveying frame (1).

2. A glue line inspection apparatus for printed publications as claimed in claim 1, wherein: The conveying frame (1) is provided with two conveying rollers (2) rotatably installed thereon, one of the conveying rollers (2) is located at the head of the conveying channel, the other conveying roller (2) is located at the tail of the conveying channel, the conveying belt (4) is drivingly connected between the two conveying rollers (2), and a conveying motor (3) is installed on the outer side wall of the conveying frame (1), the driving end of the conveying motor (3) is connected with the conveying roller (2) located at the tail of the conveying channel.

3. A glue line inspection apparatus for printed publications as claimed in claim 1, wherein: The driving assembly comprises a bidirectional screw rod (9) rotatably installed on the conveying frame (1), a nut (10) threadedly connected to the bidirectional screw rod (9), and a connecting rod (12) rotatably connected to the nut (10), the end of the connecting rod (12) away from the nut (10) is hingedly connected with the active plate (8).

4. A glue line inspection apparatus for printed publications as claimed in claim 3 wherein: The outer side wall of the conveying frame (1) is provided with a driving motor (11), and the driving end of the driving motor (11) is connected with one end of the bidirectional screw rod (9).

5. A glue line inspection apparatus for printed publications as claimed in claim 3 wherein: The active plate (8) and the nut (10) are both provided with a connecting seat, and the connecting rod (12) is connected with the active plate (8) and the nut (10) through the connecting seat.

6. A glue line inspection apparatus for printed publications as defined in claim 1, characterized in that: The tail of the conveying frame (1) is provided with a support, and the first camera (5) is fixedly installed on the support.

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