Automatic paper aligning and correcting device of four-color printing machine

Abstract

The utility model relates to the technical field of printing machines, and discloses a four-color printing machine paper automatic aligning and correcting device which comprises a printing machine, a correcting cavity is formed in one side of the outer wall of the printing machine, a conveying plate is fixedly connected to the interior of the correcting cavity, and a first servo motor is fixedly connected to the inner top wall of the conveying plate. The output end of the first servo motor is fixedly connected with a cam, the left side and the right side of the inner wall of the conveying plate are each fixedly connected with one end of a first telescopic rod, the other end of each first telescopic rod is fixedly connected with a trapezoidal block, the two trapezoidal blocks are connected through a second telescopic rod, and the left end and the right end of the outer wall of the second telescopic rod are fixedly connected with a first spring. According to the utility model, the paper is pushed by the trapezoidal block, so that the center of the paper moves towards the median line inside the correction cavity, the design considers the paper with different sizes, meets the requirement of printing in the middle of the paper with different areas, ensures the printing quality and improves the printing efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of printing presses, in particular to an automatic paper alignment and correction device for a four-color printing press. Background Art

[0002] A four-color printing press is a common printing device used to print multiple colors on printed materials. It usually uses four colors of ink: cyan, magenta, yellow and black. By printing color by color, it can produce colorful patterns and texts. During the printing process, paper alignment and correction is one of the key factors to ensure printing quality and accuracy.

[0003] However, the existing printing press paper alignment calibration is mostly unilateral calibration, which can ensure the alignment of one end of the paper, but when there is a need for centered printing, the disadvantages of unilateral calibration are exposed. In addition, unilateral calibration still has certain limitations in actual application. Due to the diversity of printing press paper sizes and the complexity of printing content, unilateral calibration is difficult to meet the printing needs in all scenarios. Sometimes, even if the paper is adjusted into place through unilateral calibration, it may still be offset during the printing process, which undoubtedly brings many inconveniences to printing work. Utility Model Content

[0004] In order to remedy the above shortcomings, the utility model provides an automatic paper alignment and correction device for a four-color printing press, aiming to improve the problem in the prior art that single-side calibration is difficult to meet printing requirements in all scenarios.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an automatic paper alignment and correction device for a four-color printing press, comprising a printing press, a correction cavity is opened on one side of the outer wall of the printing press, a transmission plate is fixedly connected inside the correction cavity, a first servo motor is fixedly connected to the inner top wall of the transmission plate, a cam is fixedly connected to the output end of the first servo motor, one end of a contraction rod 1 is fixedly connected to the left and right sides of the inner wall of the transmission plate, a trapezoidal block is fixedly connected to the other end of the contraction rod 1, the two trapezoidal blocks are connected by a contraction rod 2, a spring 1 is fixedly connected to the left and right ends of the outer wall of the contraction rod 2, a limiting plate is fixedly connected to the bottom of the outer wall of the trapezoidal block, and a transmission mechanism is fixedly connected to the inside of the limiting plate.

[0006] As a further description of the above technical solution:

[0007] The transmission mechanism comprises a telescopic rod, the telescopic rod is fixedly connected to the inner top wall of the limiting plate, the output end of the telescopic rod is fixedly connected to a second spring, and the outer wall of the second spring is fixedly connected to a fixing plate.

[0008] As a further description of the above technical solution:

[0009] A cavity is provided inside the transmission plate, and a plurality of round rollers are equidistantly rotatably connected inside the cavity, and the plurality of round rollers are connected by a transmission belt.

[0010] As a further description of the above technical solution:

[0011] The outer wall of the printing machine is fixedly connected with a controller, and the controller is electrically connected to the first servo motor and the telescopic rod respectively.

[0012] As a further description of the above technical solution:

[0013] The plurality of transmission mechanisms are placed in a staggered manner.

[0014] As a further description of the above technical solution:

[0015] The transmission mechanism also includes a pressing plate, which is fixedly connected to the output end of the telescopic rod.

[0016] As a further description of the above technical solution:

[0017] The outer wall of the fixed plate is rotatably connected with a rotating plate.

[0018] The utility model has the following beneficial effects:

[0019] 1. In the utility model, the paper is pushed by the trapezoidal block so that the center of the paper moves toward the median line inside the correction cavity. This design takes into account papers of different sizes and meets the needs of centering printing of papers of different areas. This design not only ensures the printing quality, but also improves the printing efficiency.

[0020] 2. In the present invention, after the limit plate completes the position calibration of the paper to be printed, the telescopic rod drives the fixed plate to contact the side of the paper, reducing the friction between the inner wall of the limit plate and the paper, so that the paper can move smoothly during calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional diagram of the automatic paper alignment and correction device for a four-color printing press proposed by the utility model;

[0022] Figure 2 This is a display diagram of the automatic paper alignment and correction device for a four-color printing press proposed by the utility model;

[0023] Figure 3 This is a cross-sectional view of the automatic paper alignment correction device for a four-color printing press proposed by the utility model;

[0024] Figure 4 This is an enlarged view of point A of the automatic paper alignment and correction device for a four-color printing press proposed by the utility model.

[0025] Legend:

[0026] 1. Printing machine; 2. Correction cavity; 3. Transmission plate; 4. Retraction rod 1; 5. First servo motor; 6. Cam; 7. Trapezoidal block; 8. Spring 1; 9. Retraction rod 2; 10. Limit plate; 11. Transmission mechanism; 1101. Telescopic rod; 1102. Spring 2; 1103. Fixed plate; 1104. Rotating plate; 1105. Pressing plate; 12. Transmission belt; 13. Round roller; 14. Cavity; 15. Controller. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Reference Figure 1-4 The utility model provides an embodiment: a paper automatic alignment correction device for a four-color printing press, comprising a printing press 1, a correction chamber 2 is provided on one side of the outer wall of the printing press 1, a transmission plate 3 is fixedly connected inside the correction chamber 2, a first servo motor 5 is fixedly connected to the inner top wall of the transmission plate 3, a cam 6 is fixedly connected to the output end of the first servo motor 5, one end of a contraction rod 4 is fixedly connected to the left and right sides of the inner wall of the transmission plate 3, a trapezoidal block 7 is fixedly connected to the other end of the contraction rod 4, two trapezoidal blocks 7 are connected by a contraction rod 2 9, a spring 1 8 is fixedly connected to the left and right ends of the outer wall of the contraction rod 2 9, a limit plate 10 is fixedly connected to the bottom of the outer wall of the trapezoidal block 7, and a transmission mechanism 11 is fixedly connected to the inside of the limit plate 10;

[0029] Specifically, in the entire printing process, the first servo motor 5 plays a vital role. Its startup drives the rotation of the cam 6. This mechanical transmission mode is a common mechanical transmission element. In this transmission mode, the rotational force of the motor is converted into linear motion, thereby realizing the transmission of force. The rotation of the cam 6 drives the trapezoidal blocks 7 on both sides to be synchronously subjected to different degrees of outward extrusion force. This pressure enables the trapezoidal blocks 7 on both sides to make linear relative motion, providing physical conditions for the correction of paper. In this process, when the paper passes through the correction cavity 2, the trapezoidal block 7 pushes the paper with its unique shape, so that the center of the paper moves toward the median line inside the correction cavity 2. This design takes into account papers of different sizes and meets the needs of centering printing of papers of different areas. This design not only ensures the printing quality, but also improves the printing efficiency, because during the printing process, the paper can automatically adjust its position to avoid printing errors caused by inaccurate paper position. In addition, this design also reduces the difficulty of operation and makes the printing process easier.

[0030] The transmission mechanism 11 includes a telescopic rod 1101, which is fixedly connected to the inner top wall of the limit plate 10, and the output end of the telescopic rod 1101 is fixedly connected to a spring 1102, and the outer wall of the spring 1102 is fixedly connected to a fixed plate 1103;

[0031] Specifically, after the limiting plate 10 completes the position calibration of the paper to be printed, the telescopic rod 1101 drives the fixing plate 1103 to contact the side of the paper, reducing the friction between the inner wall of the limiting plate 10 and the paper, so that the paper can move smoothly during calibration.

[0032] A cavity 14 is provided inside the transmission plate 3, and a plurality of round rollers 13 are equidistantly connected to the cavity 14 for rotation. The plurality of round rollers 13 are connected by a transmission belt 12.

[0033] Specifically, the plurality of round rollers 13 rotate to drive the conveyor belt 12, so that the paper on the top wall of the conveyor belt 12 is fed accordingly, and the paper is calibrated and printed during the feeding process.

[0034] The outer wall of the printing machine 1 is fixedly connected with a controller 15, and the controller 15 is electrically connected to the first servo motor 5 and the telescopic rod 1101 respectively;

[0035] Specifically, the first servo motor 5 and the telescopic rod 1101 can be quickly turned on respectively through the controller 15.

[0036] The plurality of transmission mechanisms 11 are staggered;

[0037] The outer wall of the fixed plate 1103 is rotatably connected with a rotating plate 1104;

[0038] Specifically, the staggered placement of the multiple transmission mechanisms 11 enables different groups of rotating plates 1104 to be at different heights, thereby preventing the paper from being stuck in the gaps of the rotating plates 1104 .

[0039] The transmission mechanism 11 further includes a pressing plate 1105, which is fixedly connected to the output end of the telescopic rod 1101;

[0040] Specifically, the extension of the output end of the telescopic rod 1101 can drive the pressing plate 1105 to press down, so that the top of the paper is slightly limited to avoid the paper being too light and causing the paper to fold.

[0041] Working principle: Multiple round rollers 13 rotate to drive the transmission belt 12, so that the paper on the top wall of the transmission belt 12 is fed accordingly. The paper is calibrated and printed during the feeding process. During the whole printing process, the first servo motor 5 plays a vital role. Its start-up drives the rotation of the cam 6. This mechanical transmission mode is a common mechanical transmission element. Under this transmission mode, the rotation force of the motor is converted into linear motion, thereby realizing the transmission of force. The rotation of the cam 6 drives the trapezoidal blocks 7 on both sides to be subjected to different degrees of outward extrusion force synchronously. This pressure enables the trapezoidal blocks 7 on both sides to make linear relative motion, providing physical conditions for the correction of the paper. In this process, when the paper passes through the correction cavity 2, the trapezoidal block 7 pushes the paper with its unique shape, so that the center of the paper moves toward the median line inside the correction cavity 2. This design takes into account papers of different sizes and meets the needs of centered printing of papers of different areas. This design not only ensures printing quality, but also improves printing efficiency, because during the printing process, the paper can automatically adjust its position, avoiding printing errors caused by inaccurate paper position. In addition, this design reduces the difficulty of operation and makes the printing process simpler. After the limit plate 10 completes the position calibration of the paper to be printed, the telescopic rod 1101 drives the fixed plate 1103 to contact the side of the paper, reducing the friction between the inner wall of the limit plate 10 and the paper, so that the paper can move smoothly during calibration.

[0042] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A paper automatic alignment correction device for a four-color printing press, comprising a printing press (1), characterized in that: A correction chamber (2) is provided on one side of the outer wall of the printing machine (1); a transmission plate (3) is fixedly connected to the interior of the correction chamber (2); a first servo motor (5) is fixedly connected to the inner top wall of the transmission plate (3); a cam (6) is fixedly connected to the output end of the first servo motor (5); one end of a retracting rod (4) is fixedly connected to the left and right sides of the inner wall of the transmission plate (3); a trapezoidal block (7) is fixedly connected to the other end of the retracting rod (4); the two trapezoidal blocks (7) are connected via a retracting rod (9); a spring (8) is fixedly connected to the left and right ends of the outer wall of the retracting rod (9); a limit plate (10) is fixedly connected to the bottom of the outer wall of the trapezoidal block (7); a transmission mechanism (11) is fixedly connected to the interior of the limit plate (10).

2. The automatic paper alignment correction device for a four-color printing press according to claim 1, characterized in that: The transmission mechanism (11) comprises a telescopic rod (1101), wherein the telescopic rod (1101) is fixedly connected to the inner top wall of the limit plate (10), the output end of the telescopic rod (1101) is fixedly connected to a second spring (1102), and the outer wall of the second spring (1102) is fixedly connected to a fixing plate (1103).

3. The automatic paper alignment correction device for a four-color printing press according to claim 1, characterized in that: A cavity (14) is provided inside the transmission plate (3), and a plurality of round rollers (13) are equidistantly rotatably connected inside the cavity (14), and the plurality of round rollers (13) are connected via a transmission belt (12).

4. The automatic paper alignment correction device for a four-color printing press according to claim 2 is characterized in that: A controller (15) is fixedly connected to the outer wall of the printing machine (1), and the controller (15) is electrically connected to the first servo motor (5) and the telescopic rod (1101) respectively.

5. The automatic paper alignment correction device for a four-color printing press according to claim 2, characterized in that: The plurality of transmission mechanisms (11) are placed in a staggered manner.

6. The automatic paper alignment correction device for a four-color printing press according to claim 2, characterized in that: The transmission mechanism (11) further comprises a pressing plate (1105), wherein the pressing plate (1105) is fixedly connected to the output end of the telescopic rod (1101).

7. The automatic paper alignment correction device for a four-color printing press according to claim 2, characterized in that: The outer wall of the fixed plate (1103) is rotatably connected to a rotating plate (1104).

Images