A printing machine paper rectifying device

Abstract

The utility model discloses a printing machine paper deviation rectifying device relates to printing machine technical field, including detection mechanism, controller and deviation rectifying mechanism from left to right electric connection in proper order, deviation rectifying mechanism includes support block, first fixed ring, moving block, pivot, rotating roller, support, moving mechanism, and moving mechanism is electrically connected with controller, and the bottom end screw thread connection of moving mechanism is with support, and the top fixedly connected with second fixed ring of support top, and one end is movably connected with second fixed ring of pivot, and the other end is movably connected with first fixed ring, and first fixed ring bottom end is fixedly connected with moving block top, and the top of support block is equipped with moving groove, and moving block is located in moving groove, and moving block moves in moving groove, and rotating roller is rotatably connected on pivot, the utility model discloses through rotating roller and paper carry out reverse inclination, and paper is rectified, and paper is guided to return to correct conveying path, and the whole process does not contact to paper side edge, and thoroughly avoids the friction to paper side edge.

Description

Technical Field

[0001] This utility model relates to the field of printing press technology, and in particular to a paper correction device for printing presses. Background Technology

[0002] A printing press is a machine for printing text and images. Its principle is to first make a printing plate of the text or image to be printed, load it onto the printing press, and then apply ink to the areas of the printing plate with text and images by hand or by the printing press. The ink is then transferred directly or indirectly onto paper or other printing substrates. During the printing process, when the paper roll enters the digital printing press, the paper is prone to positional shift during unfolding, which can cause deviations in the position of the text or images to be printed on the paper, affecting the printing quality. Therefore, a correction device is needed.

[0003] The prior art patent CN223015988U discloses a paper correction structure for a printing press, which effectively solves the problems of high friction on the sides of the paper and insufficient simplification and reliability in the correction structure of existing printing presses. The technical solution includes a frame, a transmission belt that can move left and right installed inside the frame, a rotating shaft arranged in the front-back direction above the transmission belt, and the end of the rotating shaft is rotatably connected to the frame, and the rotating shaft can rotate actively; the rotating shaft has helical blades at both ends, and the two helical blades at both ends of the rotating shaft rotate in opposite directions and are symmetrical front and back; however, in actual use, the helical blades still cause friction on the sides of the paper. Therefore, there is an urgent need for a paper correction device for printing presses that can eliminate side friction during the paper feeding and correction process, in order to improve the effect of paper correction. Utility Model Content

[0004] The purpose of this invention is to provide a paper correction device for printing presses to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A paper correction device for a printing press includes a detection mechanism, a controller, and a correction mechanism that are electrically connected from left to right. The correction mechanism includes a support block, a first fixed ring, a movable block, a rotating shaft, a rotating roller, a support, and a moving mechanism. The moving mechanism is electrically connected to the controller and threadedly connected to the bottom end of the support. A second fixed ring is fixedly connected to the top end of the support. One end of the rotating shaft is movably connected to the second fixed ring, and the other end is movably connected to the first fixed ring. The bottom end of the first fixed ring is fixedly connected to the top end of the movable block. A moving groove is provided at the top end of the support block, and the movable block is disposed in the moving groove. The movable block moves horizontally within the moving groove, moving closer to or away from the moving mechanism. The rotating roller is rotatably connected to the rotating shaft.

[0006] Furthermore, the detection mechanism includes a body, which has a U-shaped structure. Several laser emitters and laser receivers are uniformly fixed on opposite sides of the body, with each laser emitter and laser receiver corresponding to the other. The several laser emitters and laser receivers are electrically connected to the controller.

[0007] Furthermore, the moving mechanism includes a fixing mechanism, a motor, a transmission mechanism, and a lead screw. The lead screw is rotatably connected to the fixing mechanism. The motor is fixed to the top of the fixing mechanism. The transmission mechanism is located inside the fixing mechanism. The output end of the motor is connected to one end of the lead screw through the transmission mechanism. The support is sleeved on the lead screw and is threadedly connected to the lead screw. The motor is electrically connected to the controller.

[0008] Furthermore, the fixing mechanism includes a horizontal support plate, a first vertical support plate, and a second vertical support plate. The first vertical support plate and the second vertical support plate are respectively fixed on both sides of the top of the horizontal support plate. The lead screw is rotatably connected between the first vertical support plate and the second vertical support plate. The motor is fixed on the top of the horizontal support plate. A cavity is provided inside the first vertical support plate, and the transmission mechanism is located inside the cavity.

[0009] Furthermore, the transmission mechanism includes a first gear and a second gear that mesh with each other. The output end of the motor passes through the first vertical support plate and is fixedly connected to the first gear. The output end of the motor is rotatably connected to the first vertical support plate. One end of the lead screw passes through the first vertical support plate and is fixedly connected to the second gear. The lead screw is rotatably connected to the first vertical support plate.

[0010] Furthermore, a telescopic cover is provided on the outside of the lead screw, the telescopic cover is fixed between the first vertical support plate and the second vertical support plate, the bottom end of the support passes through the middle of the telescopic cover and is threaded to the lead screw, and the support is fixedly connected to the telescopic cover.

[0011] Furthermore, sliders are fixed on both sides of the movable block, and grooves that cooperate with the sliders are provided on the support block.

[0012] This utility model discloses the following technical effects: This utility model discloses a paper correction device for a printing press. The detection mechanism detects whether the paper is deviated during the conveying process and transmits the data to the controller. The controller controls the moving mechanism to work according to the transmitted data, thereby controlling the movement of one side of the rotating shaft. The other side of the rotating shaft moves and rotates accordingly, so that the rotating roller can shift forward or backward, thereby correcting the paper that is passing through the rotating roller and guiding the paper back to the correct conveying path. The whole process does not contact the side of the paper, completely avoiding friction on the side of the paper. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This utility model discloses a schematic diagram of a paper correction device for a printing press. Figure 2 This utility model discloses a schematic diagram of the installation structure of a paper correction device for a printing press. Figure 3 : Schematic diagram of the moving mechanism structure of this utility model; Figure 4 : Schematic diagram of the moving block and support block structure of this utility model; Figure 5 : Schematic diagram of the rotating shaft and the first fixed ring structure of this utility model; Specifically, 1. Detection mechanism; 11. Body; 12. Laser emitter; 13. Laser receiver; 2. Controller; 3. Correction mechanism; 31. Support block; 311. Moving groove; 312. Slide groove; 32. First fixed ring; 33. Moving block; 331. Sliding block; 34. Rotating shaft; 35. Rotating roller; 36. Support; 37. Moving mechanism; 371. Horizontal support plate; 372. First vertical support plate; 373. Second vertical support plate; 374. Motor; 375. Gear one; 376. Gear two; 377. Lead screw; 378. Telescopic cover; 379. Cavity; 38. Second fixed ring. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] The specific implementation method is as follows: like Figures 1-5 As shown; this utility model discloses a paper correction device for a printing press, which includes a detection mechanism 1, a controller 2 and a correction mechanism 3 connected in sequence from left to right; The detection mechanism 1 includes a body 11, which has a U-shaped structure. Three sets of laser emitters 12 and laser receivers 13 are evenly fixed on opposite sides of the body 11. The three laser emitters 12 and the three laser receivers 13 correspond one-to-one. The three laser emitters 12 and the three laser receivers 13 are electrically connected to the controller 2. The correction mechanism 3 includes a support block 31, a first fixed ring 32, a movable block 33, a rotating shaft 34, a rotating roller 35, a support 36, and a moving mechanism 37. The moving mechanism 37 is electrically connected to the controller 2. The moving mechanism 37 is threadedly connected to the bottom end of the support 36. A second fixed ring 38 is fixedly connected to the top end of the support 36. One end of the rotating shaft 34 is movably connected to the second fixed ring 38, and the other end is movably connected to the first fixed ring 32. The bottom end of the first fixed ring 32 is fixedly connected to the top end of the movable block 33. A moving groove 311 is opened at the top end of the support block 31. The movable block 33 is located in the moving groove 311. The movable block 33 moves horizontally in the moving groove 311, approaching or moving away from the moving mechanism 37. The rotating roller 35 is rotatably connected to the rotating shaft 34. The moving mechanism 37 includes a fixed mechanism, a motor 374, a transmission mechanism, and a lead screw 377. The lead screw 377 is rotatably connected to the fixed mechanism. The motor 374 is fixed to the top of the fixed mechanism. The transmission mechanism is located inside the fixed mechanism. The output end of the motor 374 is connected to one end of the lead screw 377 through the transmission mechanism. The support 36 is sleeved on the lead screw 377 and is threadedly connected to the lead screw 377. The motor 374 is electrically connected to the controller 2. The fixing mechanism includes a horizontal support plate 371, a first vertical support plate 372, and a second vertical support plate 373. The first vertical support plate 372 and the second vertical support plate 373 are respectively fixed on both sides of the top of the horizontal support plate 371. A lead screw 377 is rotatably connected between the first vertical support plate 372 and the second vertical support plate 373. A motor 374 is fixed on the top of the horizontal support plate 371. The first vertical support plate 372 has a cavity 379 inside, and the transmission mechanism is located inside the cavity 379. The transmission mechanism includes a first gear 375 and a second gear 376 that mesh with each other. The output end of the motor 374 passes through the first vertical support plate 372 and is fixedly connected to the first gear 375. The output end of the motor 374 is rotatably connected to the first vertical support plate 372. One end of the lead screw 377 passes through the first vertical support plate 372 and is fixedly connected to the second gear 376. The lead screw 377 is rotatably connected to the first vertical support plate 372.

[0018] Specifically, such as Figure 2 As shown, the detection mechanism 1, controller 2, and correction mechanism 3 are sequentially fixed on the frame along the paper feeding direction. The side of the paper passes through the body 11. The laser emitters 12 and receivers on both sides of the body 11 correspond one-to-one to form three laser detections. The laser emitter 12 and receiver closest to the paper are the first laser emitters 12 and receivers, and the direction is to the right. When the paper is being fed normally, the side of the paper passes through the second laser emitter 12 and receiver, which means that the laser beams of the first and second laser emitters 12 and receivers are blocked. If the paper shifts to the left or right or is tilted, it will block additional laser beams or allow the originally blocked laser beams to leak out, causing the receiver signal to change. The signal is transmitted to the controller 2, which analyzes the signal to calculate the direction and amount of paper shift. When the paper shifts to the right, the control motor 374 is started, and the motor 374 rotates to drive the gear 3. Gear 375 and gear 376 rotate, thereby driving the lead screw 377 to rotate. The lead screw 377 drives the support 36 to move forward on the lead screw 377, causing the rotating roller 35 to tilt and then reset, until the deviated paper is brought back to its original conveying path, restoring the paper to its normal position and blocking the first and second laser beams. This is to determine whether the paper has returned to the correct path. Motor 374 stops. When the paper shifts to the left, control motor 374 starts. The rotation of motor 374 drives gear 375 and gear 376 to rotate, thereby driving the lead screw 377 to rotate. The lead screw 377 drives the support 36 to move backward on the lead screw 377 and then reset, causing the rotating roller 35 to tilt and until the deviated paper is brought back to its original conveying path, restoring the paper to its normal position and blocking the first and second laser beams. This is to determine whether the paper has returned to the correct path and achieve paper deviation correction.

[0019] Throughout the entire operation of this invention, the paper position is detected by laser non-contact detection, and the correction force is transmitted through the friction between the rotating roller 35 and the paper surface. There is no contact on the side, which completely eliminates friction damage on the side of the paper and improves the pass rate of printed products.

[0020] In this embodiment, eight first springs are welded between one end of the rotating shaft 34 and the second fixed ring 38, and eight second springs are welded between the other end and the first fixed ring 32. The rotating shaft is connected to the end of the rotating shaft through the springs. Since the springs have elastic deformation, it is convenient for the rotating shaft 34 to change position relative to the first fixed ring 32 or the second fixed ring 38, so that the rotating shaft 34 can be tilted, thereby driving the rotating roller 35 to tilt.

[0021] In this embodiment, a telescopic cover 378 is provided on the outside of the lead screw 377. The telescopic cover 378 is fixed between the first vertical support plate 372 and the second vertical support plate 373. The bottom end of the support 36 passes through the middle of the telescopic cover 378 and is threadedly connected to the lead screw 377. The support 36 and the telescopic cover 378 are fixedly connected.

[0022] This utility model sets the telescopic cover 378 as a corrugated pipe to block dust and paper scraps from the printing workshop from entering the thread gap of the lead screw 377, causing the thread transmission to jam and the transmission effect to deteriorate.

[0023] In this embodiment, sliders 331 are fixed on both sides of the movable block 33, and a groove 312 that cooperates with the sliders 331 is provided on the support block 31.

[0024] The slider 331 of this utility model slides in the groove 312, which limits the movement of the moving block 33, so that the moving block 33 can only move in the moving groove 311. This makes it easier for the other side to move towards or away from the moving mechanism 37 as the rotating shaft 34 moves on one side, so that the rotating roller 35 can tilt.

[0025] In this embodiment, three sets of laser emitters 12 and laser receivers 13 are used to collect edge information of the paper edge. The edge information includes position and direction information. A correction analysis module is built into the controller to receive and analyze the edge information of the paper edge to obtain deviation information. The deviation information includes a deviation value measurement and an offset. The deviation information is normalized to obtain a correction value. A correction threshold is set, and the correction value is compared with the correction threshold. If the correction value is less than the correction threshold, no processing is performed. If the correction value is greater than or equal to the correction threshold, a correction signal is generated. When generating the correction process, the distance that the support needs to move is calculated based on the correction value and the set correction coefficient. The movement direction and distance of the support are obtained, and the number of revolutions of the motor in the forward or reverse direction is calculated based on the direction and distance to be moved. The paper edge is detected by the three sets of laser emitters 12 and laser receivers 13, and the operation of the motor is quickly adjusted according to the real-time situation of the correction process to ensure the paper correction effect.

[0026] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A paper alignment device for a printing press, characterized in that, It includes a detection mechanism (1), a controller (2), and a correction mechanism (3) that are electrically connected from left to right. The correction mechanism (3) includes a support block (31), a first fixed ring (32), a moving block (33), a rotating shaft (34), a rotating roller (35), a support (36), and a moving mechanism (37). The moving mechanism (37) is electrically connected to the controller (2). The moving mechanism (37) is threaded to the bottom end of the support (36). The top end of the support (36) is fixedly connected to a second fixed ring (38). One end of the rotating shaft (34) is movably connected to the second fixed ring (38), and the other end is movably connected to the first fixed ring (32). The bottom end of the first fixed ring (32) is fixedly connected to the top end of the moving block (33). The top end of the support block (31) is provided with a moving groove (311). The moving block (33) is located in the moving groove (311). The moving block (33) moves horizontally in the moving groove (311) closer to or further away from the moving mechanism (37). The rotating roller (35) is rotatably connected to the rotating shaft (34).

2. The paper alignment device for a printing press according to claim 1, characterized in that, The detection mechanism (1) includes a body (11), which is a U-shaped structure. Several laser emitters (12) and laser receivers (13) are uniformly fixed on opposite sides of the body (11). The laser emitters (12) and the laser receivers (13) correspond one-to-one. The several laser emitters (12) and the laser receivers (13) are electrically connected to the controller (2).

3. The paper alignment device for a printing press according to claim 1, characterized in that, The moving mechanism (37) includes a fixed mechanism, a motor (374), a transmission mechanism, and a lead screw (377). The lead screw (377) is rotatably connected to the fixed mechanism. The motor (374) is fixed to the top of the fixed mechanism. The transmission mechanism is located inside the fixed mechanism. The output end of the motor (374) is connected to one end of the lead screw (377) through the transmission mechanism. The support (36) is sleeved on the lead screw (377) and threadedly connected to the lead screw (377). The motor (374) is electrically connected to the controller (2).

4. The paper alignment device for a printing press according to claim 3, characterized in that, The fixing mechanism includes a horizontal support plate (371), a first vertical support plate (372), and a second vertical support plate (373). The first vertical support plate (372) and the second vertical support plate (373) are respectively fixed on both sides of the top of the horizontal support plate (371). The first vertical support plate (372) and the second vertical support plate (373) are rotatably connected by the lead screw (377). The motor (374) is fixed on the top of the horizontal support plate (371). The first vertical support plate (372) has a cavity (379) inside, and the transmission mechanism is located in the cavity (379).

5. A paper alignment device for a printing press according to claim 4, characterized in that, The transmission mechanism includes a first gear (375) and a second gear (376) that mesh with each other. The output end of the motor (374) passes through the first vertical support plate (372) and is fixedly connected to the first gear (375). The output end of the motor (374) is rotatably connected to the first vertical support plate (372). One end of the lead screw (377) passes through the first vertical support plate (372) and is fixedly connected to the second gear (376). The lead screw (377) is rotatably connected to the first vertical support plate (372).

6. A paper alignment device for a printing press according to claim 5, characterized in that, A telescopic cover (378) is provided on the outside of the lead screw (377). The telescopic cover (378) is fixed between the first vertical support plate (372) and the second vertical support plate (373). The bottom end of the support (36) passes through the middle of the telescopic cover (378) and is threaded to the lead screw (377). The support (36) is fixedly connected to the telescopic cover (378).

7. A paper alignment device for a printing press according to claim 1, characterized in that, The movable block (33) has sliders (331) fixed on both sides, and the support block (31) has a groove (312) that cooperates with the sliders (331).

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