A paper stack leveling device and its leveling method

Abstract

This application discloses a paper stack leveling device and its leveling method, including a first leveling device and a second leveling device. Both leveling devices are equipped with a detection module, a controller, and a multi-point leveling module. The detection module is used to detect the flatness parameters of each detection point of the paper stack to be leveled. The controller receives the flatness parameters and generates corresponding leveling control commands for each detection point based on the flatness parameters. The multi-point leveling module executes the leveling control commands corresponding to each detection point. At the same time, the second leveling device is also equipped with a side paper insertion mechanism, which works in conjunction with the multi-point leveling module to achieve automatic leveling of the paper stack. Compared with the prior art, this application executes different leveling control commands in different areas of the paper stack, and the adjustment action of the leveling device matches the actual situation of the top surface of the paper stack. At the same time, this application also realizes automatic leveling of the paper stack without human intervention, freeing up labor, and has higher adjustment efficiency and better leveling effect.

Description

Technical Field

[0001] This application relates to the field of banknote printing technology, specifically to a paper stack leveling device and its leveling method. Background Technology

[0002] In the current banknote printing process, the flatness of the product surface is crucial to the printing quality during the pre-stacking and printing stages. In existing technology, the flatness of the product surface is judged by the gatekeeper based on production experience. When stacking paper, the flatness of the paper surface is adjusted by inserting triangular wedges or cardboard around the paper stack. During high-speed printing, as the paper is continuously conveyed and the paper stack rises, the gatekeeper still needs to continuously adjust the triangular wedges or cardboard to ensure smooth paper delivery.

[0003] The above adjustment method requires a dedicated gatekeeper, which not only wastes human resources, but also relies heavily on the experience and eyesight of the workers, and is prone to paper feeding stoppage due to human negligence, resulting in poor paper stack leveling quality. Summary of the Invention

[0004] The main purpose of this application is to provide a paper stack leveling device and its leveling method, which aims to solve the defects of poor leveling quality in traditional manual gate inspection.

[0005] To achieve the above objectives, this application provides a paper stack leveling device, including a first leveling device and a second leveling device. Both the first and second leveling devices are equipped with a detection module, a controller, and a multi-point leveling module. The detection module is used to detect the flatness parameter d at different detection points of the paper stack to be leveled. n , where n represents the number of each detection point;

[0006] The controller determines the flatness parameter d based on each of the flatness parameters. n Generate corresponding leveling control command A for each detection point. n ;

[0007] The multi-point leveling module executes the leveling control command A corresponding to each detection point at each detection point. n The specified adjustment action is used to adjust the flatness of the paper stack to be adjusted;

[0008] The second leveling device is also equipped with several side paper insertion mechanisms for side paper handling.

[0009] Optionally, the side paper insertion mechanism includes a base, on which a lifting plate and a screw motor for adjusting the height of the lifting plate are provided; the lifting plate is provided with a wedge-shaped insertion plate and an adjusting cylinder for driving the insertion plate to be inserted into the paper stack to be leveled.

[0010] Optionally, the base is also provided with a sliding rail and a sliding block that cooperate with each other, and the screw motor is fixed on the sliding block; the base is also provided with an adjusting motor and an adjusting screw that are connected to the power supply, and the adjusting screw is threadedly connected to the sliding block.

[0011] Optionally, a support frame is also fixedly installed on the lifting plate. The support frame is equipped with a second slide rail and a second slide block that cooperate with each other. An L-shaped card plate is hinged on the second slide block, and an adjusting roller is provided at the free end of the card plate. The support frame is also equipped with a screw motor that is threadedly connected to the second slide block.

[0012] Optionally, the detection module includes several independent detection sensors, each of which corresponds to a specific detection point.

[0013] Optionally, the detection module includes a power-connected sliding frame and a screw motor, and the sliding frame is equipped with several independent detection sensors.

[0014] Optionally, the multi-point leveling module includes an adjustment platform for placing the paper stack to be leveled. The adjustment platform is provided with a plurality of adjustment holes corresponding one-to-one with each detection point, and an adjustment plate is slidably disposed in the adjustment holes. The adjustment platform is also provided with a plurality of telescopic leveling devices, and each telescopic leveling device is connected to each of the adjustment plates.

[0015] Accordingly, this application discloses a method for leveling paper stacks, characterized by comprising the following steps:

[0016] The detection data includes the flatness parameter d at each detection point in the paper stack to be leveled, collected by the detection module. n , where n represents the number of each detection point;

[0017] According to the flatness parameter d n A leveling control command An is generated for the corresponding detection point;

[0018] Leveling control command A for each detection point n The command is sent to the multi-point leveling module, so that the multi-point leveling module executes the leveling control command A corresponding to each detection point at each detection point. n The specified adjustment action is used to adjust the flatness of the stack of paper to be adjusted.

[0019] Optionally, based on each of the flatness parameters d n For each corresponding detection point, a leveling control command A is generated for each detection point. n This includes the following steps:

[0020] Establish a correspondence between detection points, detection sensors, and telescopic leveling devices;

[0021] The flatness parameter d of a certain detection point is extracted based on the correspondence. n Simultaneously extract the leveling reference value D and calculate the adjustment parameter a. n , where a n =d n -D;

[0022] If the parameter a is adjusted n If the value is positive, a first control command is generated. The first control command includes performing a lifting action in the vertical direction and the lifting amount being the adjustment parameter a. n The absolute value;

[0023] If the parameter a is adjusted n If the value is negative, a second control command is generated. The second control command includes performing a retraction action in the vertical direction and the retraction amount being the adjustment parameter a. n The absolute value of.

[0024] Optionally, the leveling reference value D can be a preset value or a value for each flatness parameter d. n The average value.

[0025] Compared with the prior art, this application has the following beneficial effects:

[0026] The paper stack leveling device described in this application includes a detection module, a controller, and a multi-point leveling module. The detection module is used to detect the actual distance between each detection point of the paper stack to be leveled and the reference surface. The controller receives the detected actual distance values ​​and generates corresponding leveling control commands for each detection point based on the actual distance values. The multi-point leveling module executes the leveling control commands corresponding to each detection point to achieve leveling of the paper stack. At the same time, the second leveling device will also coordinately adjust the flatness of the paper stack through the side paper insertion mechanism.

[0027] In existing technologies, paper stacks are typically manually adjusted by operators inserting triangular wedges into them. In contrast, this application achieves automatic leveling of the paper stack without human intervention, resulting in higher leveling efficiency. Furthermore, the side-insertion paper structure adjusts the flatness of the paper stack edges, eliminating the need for dedicated operators. This not only saves labor but also frees workers from the monotonous and tedious task of wedge leveling, thereby increasing productivity.

[0028] Secondly, this application uses a detection module to detect each detection point of the paper stack to be leveled, providing accurate data support for subsequent leveling; after the data is collected, the controller formulates corresponding leveling control commands according to the specific parameters of each detection point, and then the multi-point leveling device accurately executes the corresponding leveling control commands at each detection point.

[0029] This application achieves accurate acquisition of relevant technical parameters of the concave and convex areas of the paper stack to be leveled through the detection module, and generates corresponding leveling control commands for each detection point through the controller. Therefore, the leveling method of the technical solution described in this application can be adapted to the actual situation of the paper stack at different points. Thus, its leveling solution is more targeted and more flexible, which is conducive to improving the leveling quality.

[0030] The technical solution described in this application achieves automatic leveling of the entire paper stack through the cooperation of a side paper lifting mechanism and a multi-point leveling mechanism. It can not only adjust the paper stack in the edge area, but also has a good leveling effect on the depressions or protrusions in the center area of ​​the paper stack. Compared with the overall lifting and leveling, the leveling scheme of the technical solution described in this application is more refined and can greatly improve the leveling quality.

[0031] Finally, this application can replace the traditional manual gate leveling method, realize automatic leveling of paper stacks, improve the automation level of printing production lines, and help promote the intelligent development of printing enterprises. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the leveling device described in this application;

[0033] Figure 2 This is a schematic diagram of the enlarged structure of part A;

[0034] Figure 3 This is a schematic diagram of the side-insertion paper mechanism.

[0035] Figure 4 Exploded view of the multi-point leveling module;

[0036] Figure 5 This is a top view of the multi-point leveling module;

[0037] Figure 6 A schematic diagram of the functional modules of a controller provided for an embodiment of this application;

[0038] Figure 7 A flowchart of a leveling method provided for embodiments of this application.

[0039] Reference numerals: 1-First leveling device, 2-Second leveling device, 3-Detection module, 4-Controller, 5-Multi-point leveling module, 6-Base, 7-Lifting plate, 8-Screw motor, 9-Inserting cardboard, 10-Adjusting cylinder, 11-Slide rail, 12-Slide seat, 13-Adjusting motor, 14-Adjusting screw, 15-Support frame, 16-Second slide rail, 17-Second slide seat, 18-Paperboard pusher, 19-Adjusting roller, 20-Detection sensor, 21-Sliding frame, 22-Adjusting platform, 23-Adjusting hole, 24-Adjusting plate, 25-Telescopic leveling device, 26-Limiting block, 27-Limiting groove.

[0040] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0042] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0043] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0045] Implementation Method 1

[0046] Reference Figure 1 , 3 4 and 5, this embodiment provides a paper stack leveling device, including a first leveling device 1 and a second leveling device 2. The second leveling device 2 includes a frame, and a mounting frame is provided on the top of the frame. A detection module 3 is provided on the mounting frame. The detection module 3 includes several independent detection sensors 20. According to the actual detection accuracy requirements, the detection sensors 20 are photoelectric sensors or distance sensors. The detection sensors 20 are evenly arranged in a rectangular or square row on the mounting frame. At the same time, according to the printing process, under the condition that other external conditions remain unchanged or do not change much, the position of the concave or convex areas of the paper stack is generally fixed after stacking. Therefore, in order to improve the accuracy of adjustment and control, more detection sensors 20 can be selectively set in the above-mentioned areas. During the installation process, each detection sensor 20 is in a vertical state, and the detection end face of each detection sensor 20 faces downward and is coplanar, which facilitates the subsequent parameter calibration.

[0047] The above setup not only allows for the wide availability of various components, effectively reducing the cost of the entire equipment, but also cleverly selects the characteristics of the detection sensor 20 in the selection of the reference plane in the above scheme, thereby simplifying the algorithm of the leveling method. This effectively reduces the complexity of the entire leveling method and is conducive to simplifying the control system.

[0048] The bottom of the frame is also provided with a multi-point leveling module 5. The multi-point leveling module 5 includes an adjustment platform 22 for stacking paper stacks to be leveled. Several adjustment holes 23 are provided on the adjustment platform 22. The multi-point leveling module 5 includes several independent telescopic leveling devices 25. As needed, the telescopic leveling device 25 can be an electric push rod, a cylinder, a hydraulic cylinder or a screw motor 8. Each adjustment hole 23 corresponds to one telescopic leveling device 25. At the same time, an adjustment plate 24 is slidably arranged in the adjustment hole 23. The adjustment plate 24 is fixedly connected to the telescopic leveling device 25.

[0049] Meanwhile, a number of limiting blocks 26 are also provided on the adjusting platform 22, and the adjusting plate is provided with limiting grooves 27 that are adapted to the limiting blocks 26. During installation, the limiting blocks 26 are inserted into the limiting grooves 27 to realize the rotation limiting of the adjusting plate, so as to avoid the adjusting plate from damaging the paper due to rotation. At the same time, it can also improve the response speed of the adjusting plate and realize the rapid lifting of the paper.

[0050] Two sets of four side paper insertion mechanisms are symmetrically arranged on both sides of the frame. Each side paper insertion mechanism includes a base 6 fixed to the frame. The base 6 has a connecting groove, and an adjusting motor 13 and an adjusting screw 14 are respectively arranged on both sides of the connecting groove. The adjusting motor 13 and the adjusting screw are connected by a synchronous drive passing through the connecting groove. Two slide rails 11 are symmetrically arranged on both sides of the adjusting screw 14. The slide rails 11 have a T-shaped structure, and a slide block 12 is slidably arranged on them. A screw motor 8 is fixedly arranged on the slide block 12. The output shaft of the screw motor 8 is connected to a lifting plate 7, thereby controlling the lifting plate 7 to rise or fall through the screw motor 8. An adjusting cylinder 10 is fixedly arranged on the top of the lifting plate 7. The output end of the adjusting cylinder 10 is connected to an insertion plate 9. The insertion plate 9 includes an integrally connected connecting end and an insertion end, wherein the connecting end is connected to the adjusting cylinder 10, and the insertion end has a wedge-shaped structure.

[0051] Meanwhile, a support frame 15 is also provided on the lifting plate 7. The support frame 15 spans above the insert paperboard 9. A screw motor 8 is also fixedly provided on the support frame 15. A second slide rail 16 is provided on the top surface of the screw motor 8. The second slide rail 16 is a T-shaped slide rail. A second slide block 17 is slidably provided on it. The second slide block 17 has a U-shaped structure. A paper-pulling plate 18 is hinged on it. The paper-pulling plate 18 has an L-shaped structure. A connecting shaft is provided at its corner. One end of the shaft is a paddle for moving the paper stack, and the other end is an adjusting roller 19.

[0052] In the actual printing process, it was found that after the banknote paper is stacked, its edges are often areas with severe collapse. Therefore, the above-mentioned structure is needed to help adjust the edge areas of the paper stack.

[0053] When using the above-mentioned equipment, the height of the inserting plate 9 is first controlled by the screw motor 8 to adjust the thickness of the paper stack to be adjusted; then, the inserting plate 9 is controlled by the adjusting motor 13 and the adjusting cylinder 10 to move horizontally to insert into the paper stack to be leveled. The adjusting motor 13 is responsible for achieving a large range of sliding. When the pushing plate 18 contacts the surface of the paper stack, the adjusting cylinder 10 pushes the inserting plate 9 to move independently. During the horizontal movement, the inserting plate 9 will contact the inside of the pushing plate 18 and push the pushing plate 18 to rotate. Since the pushing plate 18 is located on the outside of the inserting plate 9, during the movement of the pushing plate 18, it will push the paper stack upward to form an open gap in the area where the inserting plate 9 needs to be inserted, thereby facilitating the quick insertion of the inserting plate 9 and avoiding damage to the paper during the insertion process, thus improving the efficiency and quality of paper insertion.

[0054] Meanwhile, adjusting the roller 19 can effectively reduce the friction between the insert paperboard 9 and the push paperboard 18 during the movement and ensure the stability of the push paperboard 18; the height of the push paperboard 18 can also be adjusted by the screw motor 8 to meet different paper-pushing adjustment needs.

[0055] During the equipment design phase, it is necessary to select the detection points as needed. The number of detection points should take into account both the adjustment quality and the control difficulty. After the detection points are selected, the positions of the detection sensor 20 and each telescopic adjustment device are determined. One detection point corresponds to one detection sensor 20 and one telescopic leveling device 25, and the axes of the above-mentioned equipment in the same group are collinear.

[0056] Reference Figure 1 and Figure 6 A controller 4 is installed on the side wall of the frame. The controller 4 includes a first module and a second module, which are communicatively connected. The controller 4 also includes a communication module, which is communicatively connected to each of the detection sensors 20 to receive parameters detected by each sensor. The operator uses the first module to set and generate a reference distance value D. Simultaneously, based on the aforementioned position settings, a correspondence is established between the detection points, the detection sensors 20, and the telescopic leveling device 25, and a unique and fixed number is assigned to each detection point. The second module, upon receiving the flatness parameter d... n In this case, the reference distance value D stored in the first module is called to generate a corresponding leveling control command A for each detection point. n ; and then through the leveling control command A n Precisely control each telescopic leveling device 25 to perform the corresponding action.

[0057] Meanwhile, a paper stack lifting mechanism is also installed on the frame. The paper stack lifting mechanism is connected to an external lifting device, thereby lifting the multi-point leveling module 5 as a whole through the paper stack lifting mechanism, so as to ensure that the distance between the top surface of the paper stack to be leveled and the detection sensor 20 remains unchanged, thereby meeting the working requirements of the feeder and realizing cooperation with external equipment.

[0058] Reference Figure 1 and Figure 2 The controller 4 and multi-point leveling device of the first leveling device 1 have the same structure as the controller 4 and multi-point leveling device of the second leveling device 2. Its detection module 3 includes a sliding frame 21 fixed to the top of the frame and a screw motor 8. The sliding frame 21 is poweredly connected to the screw motor 8. Several independent detection sensors 20 are also provided on the sliding frame 21. Photoelectric sensors or distance sensors are selected as needed for the detection sensors 20.

[0059] In use, the sliding frame 21 is driven by the screw motor 8 to move the detection sensor to different detection points, thereby realizing data acquisition at all detection points; compared with the existing technology, it can significantly reduce the number of detection sensors 20.

[0060] Meanwhile, the aforementioned detection module 3 can also collect relevant data in a continuous scanning mode, and fit the flatness curve of the top surface of the paper stack using the data, thereby further improving the accuracy of the adjustment.

[0061] Implementation Method 2

[0062] like Figure 7 As shown, this embodiment discloses a paper stack leveling method based on the automatic leveling device described in Embodiment 1. The method of this embodiment uses the controller in the leveling device as the execution subject:

[0063] The leveling of the first leveling device includes the following steps:

[0064] S1. Acquire detection data, which includes the flatness parameter d at each detection point in the paper stack to be leveled, collected by the detection module. n , where n represents the number of each detection point;

[0065] The paper stacks are neatly arranged on the leveling platform; the detection sensors are activated to measure the flatness parameters d1, ..., d2 at each detection point on the top surface of the paper stack to be leveled. n ;

[0066] After the detection is completed, the corresponding parameters are sent to the controller, and the controller then obtains the detection data from each detection sensor.

[0067] S2, based on the flatness parameters d described above nA leveling control command An is generated for the corresponding detection point;

[0068] S21. Establish a correspondence between the detection points, detection sensors, and telescopic leveling devices;

[0069] During the equipment installation process, the required detection points are first established based on the top surface of the paper stack to be leveled, and a unique number n is generated for each detection point.

[0070] During installation, each detection sensor and each telescopic leveling device are paired and grouped according to a one-to-one correspondence. After the pairing and grouping are completed, the detection sensors and leveling devices are installed at the corresponding detection points, and the axes of the detection sensors and the telescopic leveling devices are collinear.

[0071] The above settings enable the establishment of a stable correspondence between the detection points, detection modules, and leveling devices, thereby facilitating the controller to quickly and accurately control the corresponding devices to perform corresponding actions, thus improving the accuracy and reliability of the control. Moreover, this can be achieved through simple structural adjustments, without the need to set up cumbersome calling programs, which greatly simplifies the leveling method.

[0072] S22. Extract the flatness parameter d of a certain detection point according to the correspondence. n Simultaneously extract the leveling reference value D. i Where i represents the scan job number; calculate the adjustment parameter a. n , where a n =d n -D i It should be noted that D i It belongs to the same technical indicator as D mentioned above, but its acquisition method is different. Here, different symbols are used to describe it in order to distinguish it.

[0073] Since the first leveling device is used for offline leveling of the stacks, where workers continuously stack banknotes in increments of 500 or 1000 sheets, the equipment needs to continuously level the stacks to ensure flatness after stacking. As the paper is continuously stacked, the height of the stack increases dynamically, while the sensor position remains fixed. Therefore, the average value of all leveling parameters collected in the same scanning operation is taken as the leveling reference value D. i , where i represents the number of each scan job; this value is updated once after each scan is completed;

[0074] The controller's communication module receives the flatness parameters d1, ..., d2 at each detection point measured by the detection module. nThe controller first calculates the leveling reference value Di according to the above method, and then the second module in the controller extracts the flatness parameter a of any detection point from it. n Then according to formula a n =d n -D i Calculate the adjustment parameter 'a' for each detection point. n ;

[0075] S23, If the parameter a is adjusted n If the value is positive, a first control command is generated. The first control command includes performing a lifting action in the vertical direction and the lifting amount being the adjustment parameter a. n The absolute value;

[0076] If the parameter a is adjusted n If the value is positive, the second module generates a first control command, wherein the first control command includes a lifting action, and the lifting action refers to the telescopic leveling device lifting in a vertically upward direction, the lifting amount being the adjustment parameter a. n The absolute value; the first control command is the leveling control command A. n ;

[0077] S24. If the parameter a is adjusted... n If the value is negative, a second control command is generated. The second control command includes performing a retraction action in the vertical direction and the retraction amount being the adjustment parameter a. n The absolute value of.

[0078] If the parameter a is adjusted n If the value is negative, the second module generates a second control command, wherein the second control command includes a retraction action, and the retraction action refers to the telescopic leveling device retracting downwards in a vertically downward direction, the retraction amount being the adjustment parameter a. n The absolute value; the second control command is the leveling control command A. n ;

[0079] During the adjustment process, if the paper stack becomes concave, according to the definition of reference distance and actual distance in this application, the actual distance will inevitably be greater than the reference distance. If the paper stack bulges, the actual distance will inevitably be less than the reference distance. Based on the above rules, this application cleverly sets the leveling reference value D. i With flatness parameter d n Combined with the pre-set correspondence, the entire leveling process is greatly simplified, reducing the difficulty of leveling the entire paper stack.

[0080] S3. Execute the leveling control command A for each detection point. nThe multi-point leveling module executes the leveling control command A corresponding to each detection point at each detection point. n The specified adjustment action is used to adjust the flatness of the paper stack to be adjusted;

[0081] The second module in the controller retrieves each leveling control command A. n According to the second control command, the corresponding leveling device is controlled to perform lifting or retraction actions, and the amount of its action is adjusted by parameter a. n The absolute value of the value is used to support the paper stack in the concave area to move upward to fill the concave area, or to lower the paper stack in the convex area, so as to ensure that the flatness of the top surface of the entire paper stack is within the allowable range.

[0082] The leveling of the second leveling device includes the following steps:

[0083] S1. Acquire detection data, which includes the flatness parameter d at each detection point in the paper stack to be leveled, collected by the detection module. n , where n represents the number of each detection point;

[0084] The paper stacks are neatly arranged on the leveling platform; the detection sensors are activated to measure the flatness parameters d1, ..., d2 at each detection point on the top surface of the paper stack to be leveled. n ;

[0085] After the detection is completed, the corresponding parameters are sent to the controller, and the controller then obtains the detection data from each detection sensor.

[0086] S2, based on the flatness parameters d described above n A leveling control command An is generated for the corresponding detection point;

[0087] S21. Establish a correspondence between the detection points, detection sensors, and telescopic leveling devices;

[0088] During the equipment installation process, the required detection points are first set based on the top surface of the paper stack to be leveled, and a unique number n is generated for each detection point.

[0089] During installation, each detection sensor and each telescopic leveling device are paired and grouped according to a one-to-one correspondence. After the pairing and grouping are completed, the detection sensors and leveling devices are installed at the corresponding detection points, and the axes of the detection sensors and the telescopic leveling devices are collinear.

[0090] The above settings enable the establishment of a stable correspondence between the detection points, detection modules, and leveling devices, thereby facilitating the controller to quickly and accurately control the corresponding devices to perform corresponding actions, thus improving the accuracy and reliability of the control. Moreover, this can be achieved through simple structural adjustments, without the need to set up cumbersome calling programs, which greatly simplifies the leveling method.

[0091] S22. Extract the flatness parameter d of a certain detection point according to the correspondence. n Simultaneously extract the leveling reference value D and calculate the adjustment parameter a. n , where a n =d n -D;

[0092] Since the second leveling device is used for online paper feeding leveling, it needs to work with the feeder. As the paper is continuously removed, the height of the paper stack will continuously decrease. Since the position of the paper suction device is not adjustable, the entire multi-point leveling device is often lifted by the paper stack lifting mechanism to ensure that the height of the paper on the top surface is always in a suitable position. Therefore, in the second leveling device, the height of the top of the paper to be leveled is constant. At the same time, since the position of the detection sensor is fixed, the distance between the top surface of the paper stack to be leveled and the detection sensor is a fixed value. This fixed value is the leveling reference value D, which needs to be entered into the controller in advance and saved.

[0093] The controller's communication module receives the flatness parameters d1, ..., d2 at each detection point measured by the detection module. n The second module in the controller extracts the flatness parameter d of any one of the detection points. n Then according to formula a n =d n -D calculates the adjustment parameters a for each detection point separately. n ;

[0094] S23, If the parameter a is adjusted n If the value is positive, a first control command is generated. The first control command includes performing a lifting action in the vertical direction and the lifting amount being the adjustment parameter a. n The absolute value;

[0095] If the parameter a is adjusted n If the value is positive, the second module generates a first control command, wherein the first control command includes a lifting action, and the lifting action refers to the telescopic leveling device lifting in a vertically upward direction, the lifting amount being the adjustment parameter a. n The absolute value; the first control command is the leveling control command A. n ;

[0096] S24. If the parameter a is adjusted... nIf the value is negative, a second control command is generated. The second control command includes performing a retraction action in the vertical direction and the retraction amount being the adjustment parameter a. n The absolute value of.

[0097] If the parameter a is adjusted n If the value is negative, the second module generates a second control command, wherein the second control command includes a retraction action, and the retraction action refers to the telescopic leveling device retracting downwards in a vertically downward direction, the retraction amount being the adjustment parameter a. n The absolute value; the second control command is the leveling control command A. n ;

[0098] If the paper stack becomes dented during the adjustment process, then the flatness parameter d in this application shall apply. n According to the definition of the leveling reference value D, it is inevitable that the leveling reference value D will be less than the flatness parameter d. n If the paper stack protrudes, it will inevitably cause the leveling reference value D to be greater than the flatness parameter d. n Based on the above principles, this application cleverly sets the leveling reference value D and the flatness parameter d. n Combined with the pre-set correspondence, the entire leveling process is greatly simplified, reducing the difficulty of leveling the entire paper stack.

[0099] S3. Execute the leveling control command A for each detection point. n The multi-point leveling module executes the leveling control command A corresponding to each detection point at each detection point. n The specified adjustment action is used to adjust the flatness of the paper stack to be adjusted;

[0100] The second module in the controller retrieves each leveling control command A. n According to the second control command, the corresponding leveling device is controlled to perform lifting or retraction actions, and the amount of its action is adjusted by parameter a. n The absolute value of the value is used to support the paper stack in the concave area to move upward to fill the concave area, or to lower the paper stack in the convex area, so as to ensure that the flatness of the top surface of the entire paper stack is within the allowable range.

[0101] For example, the flatness parameters d in the edge region n If the value is lower than the set value, it can be determined that the edge of the paper stack is concave. At this time, the edge of the paper stack is adjusted by the side paper insertion mechanism to improve the flatness of the paper stack.

[0102] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A paper stack leveling device, characterized in that, It includes a first leveling device (1) and a second leveling device (2), both of which are equipped with a detection module (3), a controller (4), and a multi-point leveling module (5); the detection module (3) is used to detect the flatness parameter d at different detection points of the paper stack to be leveled. n , where n represents the number of each detection point; The controller (4) determines the flatness parameters d according to the flatness parameters. n Generate corresponding leveling control command A for each detection point. n ; The multi-point leveling module (5) executes the leveling control command A corresponding to each detection point at each detection point. n The specified adjustment action is used to adjust the flatness of the paper stack to be adjusted; The second leveling device (2) is also provided with several side paper insertion mechanisms for side paper handling; The side paper insertion mechanism includes a base (6), on which a lifting plate (7) and a screw motor (8) for adjusting the height of the lifting plate (7) are provided; the lifting plate (7) is provided with a wedge-shaped insertion plate (9) and an adjusting cylinder (10) for driving the insertion plate (9) to be inserted into the paper stack to be leveled; A support frame (15) is also fixedly installed on the lifting plate (7). The support frame (15) is provided with a second slide rail (16) and a second slide block (17) that cooperate with each other. An L-shaped push plate (18) is hinged on the second slide block (17). An adjusting roller (19) is provided at the free end of the push plate (18). A screw motor that is threadedly connected to the second slide block (17) is also provided on the support frame (15). The multi-point leveling module (5) includes an adjustment platform (22) for placing the paper stack to be leveled. The adjustment platform (22) is provided with a plurality of adjustment holes (23) that correspond one-to-one with each detection point. An adjustment plate (24) is slidably arranged in the adjustment hole (23). The adjustment platform (22) is also provided with a plurality of telescopic leveling devices (25), and each telescopic leveling device (25) is connected to each adjustment plate (24).

2. The paper stack leveling device according to claim 1, characterized in that, The base (6) is also provided with a slide rail (11) and a slide block (12) that cooperate with each other, and the screw motor (8) is fixed on the slide block (12); the base (6) is also provided with a power-connected adjusting motor (13) and adjusting screw (14), and the adjusting screw (14) is threadedly connected to the slide block (12).

3. The paper stack leveling device according to claim 1, characterized in that, The detection module (3) includes several independent detection sensors (20), each of which corresponds to a detection point.

4. The paper stack leveling device according to claim 1, characterized in that, The detection module (3) includes a sliding frame (21) and a screw motor (8) connected by a power source. Several independent detection sensors (20) are provided on the sliding frame (21).

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