Post-print product positioning system for a printing press

Abstract

The utility model discloses a kind of post-printing product positioning systems of printing machine, it is related to printing equipment technical field, by the cooperation of paper feeding cam and speed reducer mechanism, paper is collected and stacked into a certain number, paper feeding cam is pressed down when needing to feed paper, and paper feeding tooth row and open tooth ball cooperate to realize paper feeding process, at the same time, the system is provided with photoelectric sensor on paper conveying route, counting paper, photoelectric sensor is additionally provided in the corresponding position of paper feeding cam to judge whether cam is pressed down, cooperate on-line counting process and PLC program, and the positioning of paper can be realized, to realize accurate tracking and accurate positioning of printing whole process.

Description

Technical Field

[0001] This utility model relates to the field of printing equipment technology, specifically to a post-printing product positioning system for a printing press. Background Technology

[0002] In existing technologies, banknote printing presses include multiple paper feed compartments. Taking intaglio printing presses as an example, because the principle of intaglio printing is different from other printing methods, it has its own unique characteristics, forming a unique printing process and method, and the printed products also have their own unique style.

[0003] From a technological perspective, because the ink layer of printed materials is relatively thick and requires a certain drying time, gravure printing machines are equipped with two sets of paper receiving compartments that work alternately to separate products in a certain quantity and prevent smudging. Generally, gravure printing machines have a unique paper receiving compartment and inserting plate mechanism. Every 1000 sheets (not exceeding 1000 sheets) of product are printed, an automatic inserting plate is inserted into the receiving panel. Simultaneously, two side plates are manually placed in front of and to the side of the already stacked 1000 sheets, inserting them into their corresponding holes. Finally, once the quantity reaches 10,000 sheets, a forklift is used to manually pull the products out of the compartment, and then the side short plates are inserted behind the panel and into their corresponding holes, thus forming a container-like structure composed of the panel, side long plates, and side short plates (collectively referred to as shelves), which are then sealed with straps for storage. With technological advancements, banknote offset printing machines and banknote coding machines have also gradually been equipped with two receiving compartments.

[0004] Due to its unique digital management requirements, banknote printing necessitates digital tracking and management throughout the entire printing process. Therefore, banknote printing presses are equipped with online counting processes to store and circulate products in units of tens of thousands. However, online counting technology cannot precisely locate the position of a specific product. When errors occur in the product's count, its location cannot be directly determined through online counting, increasing the difficulty of manual verification. This is particularly true in the intaglio printing process, where printed products need to be stacked in layers, making it difficult to locate a specific product and prone to smudging of the printed image. Utility Model Content

[0005] Based on this, the purpose of this utility model is to provide a post-printing product positioning system for printing presses, which aims to accurately track and position the entire banknote printing process.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a post-printing product positioning system for a printing press, including a printing press and a drop-in assembly connected to the printing press via a transmission line. The drop-in assembly consists of several independent drop-in combinations. Each drop-in consists of a side wall and a top plate fixedly connected to the side wall. Several movable inserts are provided inside the drop-in to divide the drop-in into layers.

[0007] The top plate inside the drop chamber is provided with a paper feeding cam, a reduction mechanism that is drivenly connected to the paper feeding cam, and a paper output gripper bar and a gripper ball that cooperate with the paper feeding cam.

[0008] A first photoelectric sensor is provided on one side of the paper feeding cam to determine whether the paper feeding cam is pressing down.

[0009] The system also includes a second photoelectric sensor disposed on the transmission line to count the number of papers on the transmission line.

[0010] By adopting the above technical solution, the paper is collected and stacked into a certain quantity through the cooperation of the paper feeding cam and the deceleration mechanism. When paper needs to be fed, the paper feeding cam is pressed down, which works with the paper feed bar and the opening ball to realize the paper feeding process. At the same time, the system is equipped with photoelectric sensors on the paper feeding route to count the paper. Photoelectric sensors are added at the corresponding positions of the paper feeding cam to determine whether the cam is pressed down. With the online counting process and PLC program, the paper can be positioned, thereby achieving accurate tracking and precise positioning of the entire printing process.

[0011] Furthermore, the drop-off group includes three drop-off compartments, including two paper drop-off compartments and one sampling compartment.

[0012] Furthermore, each of the aforementioned drop chambers is equipped with five of the aforementioned insert plates.

[0013] Furthermore, the height of each layer after the paper is divided into layers by the insert plate should be greater than the thickness of a preset number of papers.

[0014] Furthermore, the height of the layer where the paper-feeding cam is located should be greater than the sum of a preset number of paper thicknesses and the minimum distance at which the first photoelectric sensor senses the downward pressure of the paper-feeding cam.

[0015] Furthermore, the positions of the insert plates in each of the aforementioned drop chambers are distributed in the same way, so that each layer in each drop chamber is at the same horizontal height. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the warehouse loading assembly;

[0017] Figure 2 This is a cross-sectional view of the warehouse assembly.

[0018] In the diagram: 1. Side wall; 2. Top plate; 3. Insert plate; 4. Paper feeding cam. Detailed Implementation

[0019] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0020] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] The embodiments of this utility model will be described below based on its overall structure.

[0023] A post-printing product positioning system for a printing press, such as Figures 1 to 2 As shown, the post-printing product positioning system of the printing press provided by this utility model includes a printing press and a drop chamber assembly connected to the printing press via a transmission line. The drop chamber assembly consists of several independent drop chamber combinations. Each drop chamber is composed of a side wall 1 and a top plate 2 fixedly connected to the side wall 1. Several movable insert plates 3 are provided inside the drop chamber to divide the drop chamber into layers.

[0024] In this embodiment, the paper stacking group includes three stacks: two paper stacks and one sampling stack. A preset number of sheets of paper need to be stacked in the two paper stacks and on the five insert plates 3 in each stack to form two stacks of paper for storage and circulation. It can be understood that in order to place the preset number of sheets of paper into the accommodating space formed by the five insert plates 3 in each stack, the stacks are arranged from bottom to top as the first layer, the second layer, the third layer, the fourth layer, and the fifth layer. The fifth layer is the layer closest to the top plate 2. Since the insert plates 3 in each stack are distributed in the same position, each layer in each stack is at the same horizontal height. The height of each layer after the stacks are divided by the insert plates 3 should be greater than the thickness of the preset number of sheets of paper. For example, when the preset number of sheets of paper is one thousand sheets, the height of each layer should be greater than the thickness of one thousand sheets of paper.

[0025] The top plate 2 inside the drop chamber is equipped with a paper-feeding cam 4, a reduction gear mechanism connected to the paper-feeding cam 4, and a paper feed gripper bar and a gripper ball that cooperate with the paper-feeding cam 4. Specifically, the paper-feeding cam 4 is a key driving component in the entire paper collection process and is mounted on the power transmission shaft of the printing press. When the printing press is running, power drives the paper-feeding cam 4 to rotate through the transmission device. The profile design of the paper-feeding cam 4 allows it to generate periodic motion during rotation, which is transmitted to the reduction gear mechanism through mechanical linkages. Furthermore, the function of the reduction gear mechanism is to precisely control the paper collection speed. The reduction gear mechanism is generally composed of a gear set or a pulley set. For example, through multi-stage gear transmission, the rapid rotational motion of the paper-feeding cam 4 is converted into a slower speed suitable for paper collection. The reduction gear mechanism can be adjusted according to factors such as printing speed and paper size to ensure that the paper is stacked neatly and stably in the drop chamber.

[0026] It should be noted that the paper feed gripper is a component used for conveying and transferring paper. It typically consists of one or more rows of grippers that clamp the paper and, driven by the printing press, transport the paper from the printing area to above the drop chamber. The opening and closing of the grippers is precisely controlled, and its power may also come from the main drive system of the printing press, achieved through a series of linkages and cam mechanisms.

[0027] Additionally, the opening ball works in conjunction with the paper feed cam 4. When the paper feed cam 4 is pressed down, it contacts the opening ball on the paper feed bar. The pressure from the cam triggers the gripper plates to open, releasing the paper from the paper feed bar and allowing it to fall into the feed chamber for stacking. Figure 2 As shown, when the paper feeding cam 4 is horizontal, it indicates downward pressure.

[0028] A first photoelectric sensor is installed on the inner wall of the fifth layer on one side of the paper feeding cam 4, and a photoelectric generator is installed on the inner wall of the fifth layer on the other side of the paper feeding cam 4. The first photoelectric sensor determines whether the paper feeding cam 4 has a downward pressing action by receiving the light signal emitted by the photoelectric generator. It can be understood that since the first photoelectric sensor is installed in the fifth layer, the layer height of the layer where the paper feeding cam 4 is located should be greater than the sum of the thickness of the preset number of papers and the minimum distance that the first photoelectric sensor can sense when the paper feeding cam 4 is pressed down.

[0029] The system also includes a second photoelectric sensor mounted on the transport line to count the number of sheets on the line. This second photoelectric sensor consists of a light-emitting element and a receiving element. The light-emitting element (such as an infrared LED) emits a beam of light that crosses the paper transport path. As paper passes by, it blocks the light, and the receiving element (such as a phototransistor) detects this change in light. This change in light signal is converted into an electrical signal and then transmitted to the printing press's control system, which counts the sheets based on these signals.

[0030] More specifically, when the first photoelectric sensor detects the paper feeding cam 4 pressing down, it sends a signal to the second photoelectric sensor and begins counting. For example, the papers in the first layer of the first feeder are sequentially marked as a1-1, a1-2, ..., a1-1000; the papers in the first layer of the second feeder are sequentially marked as b1-1, b1-2, ..., b1-1000, and so on. This allows for marking of the papers collected on each insert plate 3. Furthermore, since the insert plates 3 are movable, they are inserted and removed under the control of a motor. Specifically, every 1000 sheets (not exceeding 1000 sheets) of product are printed, the corresponding insert plate 3 is automatically inserted. This completes the marking and positioning of each sheet of paper, facilitating paper tracking and digital management.

[0031] In summary, this utility model proposes a post-printing product positioning system for a printing press. Through the cooperation of a paper-feeding cam and a deceleration mechanism, paper is collected and stacked to a certain quantity. When paper needs to be released, the paper-feeding cam depresses, cooperating with the gripper bar and the gripper ball to realize the paper release process. Simultaneously, the system incorporates photoelectric sensors along the paper feeding path to count the paper, and photoelectric sensors at corresponding positions on the paper-feeding cam to determine whether the cam has depressed. Combined with an online counting process and a PLC program, the system can achieve paper positioning, thus realizing precise tracking and positioning throughout the entire printing process. Specifically, it not only ensures numerical accuracy but also, when product numbers are incorrect, the precise positioning system can determine the product's location, facilitating manual checks and improving the management and verification of product numbers on the production line, significantly increasing work efficiency. This system can be applied to printing presses in various stages of banknote printing, ensuring numerical accuracy through technical means and improving the work efficiency of frontline workers.

[0032] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A post-printing product positioning system for a printing press, comprising a printing press and a drop-off assembly connected to the printing press via a transmission line, characterized in that, The drop chamber assembly consists of several independent drop chamber combinations. Each drop chamber is composed of a side wall and a top plate fixedly connected to the side wall. Several movable insert plates are provided inside the drop chamber to divide the drop chamber into layers. The top plate inside the drop chamber is provided with a paper feeding cam, a reduction mechanism that is drivenly connected to the paper feeding cam, and a paper output gripper bar and a gripper ball that cooperate with the paper feeding cam. A first photoelectric sensor is provided on one side of the paper feeding cam to determine whether the paper feeding cam is pressing down. The system also includes a second photoelectric sensor disposed on the transmission line to count the number of papers on the transmission line.

2. The post-printing product positioning system for a printing press according to claim 1, characterized in that, The drop-off group includes three drop-off compartments, including two paper drop-off compartments and one sampling compartment.

3. The post-printing product positioning system for a printing press according to claim 2, characterized in that, Each of the aforementioned drop chambers is equipped with five of the aforementioned insert plates.

4. The post-printing product positioning system for a printing press according to claim 3, characterized in that, The height of each layer after the paper is divided into layers by the insert plate should be greater than the thickness of a preset number of papers.

5. The post-printing product positioning system for a printing press according to claim 4, characterized in that, The height of the layer where the paper-feeding cam is located should be greater than the sum of the thickness of a preset number of papers and the minimum distance at which the paper-feeding cam is pressed down by the first photoelectric sensor.

6. The post-printing product positioning system for a printing press according to claim 5, characterized in that, The insertion plates in each of the aforementioned drop chambers are positioned in the same way, so that each layer in each drop chamber is at the same horizontal level.

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