Paper deviation rectifying and conveying device of printing machine

Abstract

The utility model relates to the technical field of printing machines, in particular to a paper deviation rectification conveying device of a printing machine, which comprises a U-shaped base, a smooth plate is arranged in the U-shaped base, a deviation rectification piece is arranged on the smooth plate, the deviation rectification piece comprises a two-way screw rod and a first motor used for driving the two-way screw rod to rotate, and two strip-shaped moving plates are in threaded connection with the two-way screw rod. A plurality of connecting blocks which are arranged at equal intervals in the left-right direction are arranged at the top of the strip-shaped moving plate, the top ends of the connecting blocks are jointly connected with a strip-shaped push plate, and a conveying piece is arranged in the U-shaped base and located above the smooth plate. According to the paper deviation rectifying and conveying device of the printing machine, the deviation rectifying piece is arranged on the smooth plate, the two-way lead screw is matched with the first motor to drive the strip-shaped moving plate to move and drive the strip-shaped push plate to synchronously and relatively move or reversely move, the position of paper can be accurately adjusted, deviation of the paper can be effectively avoided, and it is ensured that the paper is accurately conveyed into the printing machine.

Description

Technical Field

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

[0002] A printing press is a device used for printing text, images, and graphics, widely used in the production of various printed materials such as books, newspapers, and advertisements. Modern printing presses typically consist of several basic mechanisms, including plate mounting, inking, printing, and paper feeding. Their working principle is as follows: First, the text, pattern, or image to be printed is made into a printing plate and installed in the corresponding position on the printing press. Next, a specific ink is evenly applied to the areas containing the text and pattern on the printing plate, either manually or through an automated system. Subsequently, the ink is transferred directly or indirectly to paper or other printing substrates, thus achieving efficient reproduction of the printed content. This process requires high-precision operation of the equipment and stable paper feeding to ensure the quality and consistency of the printed materials. However, if misalignment or inaccurate positioning occurs during paper feeding, it often leads to misalignment of the printed content, affecting the aesthetics and usability of the final product.

[0003] Patent CN222081946U discloses a web-correcting conveying device for a two-color printing press. The device includes a base, with multiple equidistant U-shaped frames vertically fixed on both sides of the base's top surface. A support beam is vertically connected between each pair of longitudinally symmetrical U-shaped frames. A support bar is longitudinally slidably connected to the bottom surface of the support beam, and a traction mechanism is telescopically connected to the bottom surface of the support bar. A stepped groove is formed on the top surface of the base, with multiple equidistant position sensors fixed within it. A glass plate is fixed to the upper opening of the stepped groove, with its top surface flush with the top surface of the base. This invention, by creating a stepped groove on the bottom surface of the base, installing multiple position sensors within it, and fixing a glass plate at the upper opening of the groove, with a support bar slidably connected above the glass plate and a traction mechanism movably connected to the bottom surface of the support bar, prevents paper misalignment during the gripping and traction process, thus avoiding any impact on the final printed appearance.

[0004] The aforementioned existing technology, through the cooperation of multiple position sensors and multiple traction mechanisms, can achieve paper feeding and correction functions to a certain extent. However, each traction mechanism in this system relies on a rotary motor to drive the pressure roller, requiring multiple rotary motors and significantly increasing the overall production cost of the device. Furthermore, the system contains numerous rotary motors, position sensors, and electric push rods, demanding high coordination between these components and significantly increasing the system's structural complexity, leading to a higher failure rate and hindering long-term efficient operation. Simultaneously, the complex mechanical and electronic structure also increases maintenance and operating costs, reducing the equipment's economic efficiency and applicability. Therefore, we propose a paper feeding and correction device for printing presses. Utility Model Content

[0005] The purpose of this invention is to provide a paper correction and conveying device for a printing press to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A paper correction and conveying device for a printing press includes a U-shaped base, which provides an installation position for a correction component, a smooth plate, and a conveying component. A smooth plate is provided inside the U-shaped base and near the bottom, which facilitates the movement of paper on the surface of the smooth plate. A correction component is provided on the smooth plate to correct the position of the paper and make the paper centered at the top of the smooth plate. The correction component includes a bidirectional lead screw rotatably connected between the front and rear sides of the inner wall of the U-shaped base. The correction component also includes a first motor for driving the bidirectional lead screw to rotate. The first motor is connected to an external power supply and a controller. The first motor is installed on the front side of the U-shaped base and drives the bidirectional lead screw to rotate in both directions.

[0008] The bidirectional lead screw is threaded with two strip-shaped moving plates. The top of the strip-shaped moving plates is provided with multiple connecting blocks arranged equidistantly from left to right. The front and rear sides of the smooth plate are provided with strip-shaped clearance openings for the connecting blocks to pass through. The top of the multiple connecting blocks is connected to a strip-shaped push plate. The bidirectional lead screw drives the two strip-shaped moving plates to move synchronously relative to each other or synchronously in opposite directions. When the two strip-shaped moving plates move synchronously relative to each other, the paper on the smooth plate can be centered and positioned, thereby ensuring that the paper enters the printing press accurately.

[0009] A conveying component is located within the U-shaped base and above the smooth plate. This component transports the centered paper to the printing press. The conveying component includes two fixed longitudinal plates arranged symmetrically to the left and right. The front and rear ends of the fixed longitudinal plates are fixedly connected to the front and rear sides of the inner wall of the U-shaped base, respectively. Each of the two fixed longitudinal plates has an electric telescopic rod at the center of its top. The electric telescopic rod is powered by an external power source and controller. The two electric telescopic rods work synchronously, and their telescopic movement moves the movable plate up and down, thereby adjusting the height of the conveying component to accommodate paper of different thicknesses. The movable rods of the two electric telescopic rods are connected to the movable plate. The bottom of the movable plate has three conveying components arranged equidistantly to the left and right. The two electric telescopic rods drive the movable plate to move up and down. When the movable plate moves downward, the conveying components can contact the paper and transport the paper into the printing press.

[0010] Preferably, a mounting protrusion is provided at the center of the bottom of the front strip moving plate for mounting an infrared ranging sensor, providing it with a stable mounting position. An infrared ranging sensor is provided on the rear side of the mounting protrusion, and a ranging baffle is provided at the center of the bottom of the rear strip moving plate. The infrared ranging sensor is used to detect the distance between the mounting protrusion and the ranging baffle. The thickness of the infrared ranging sensor itself is added when calculating the distance. The distance between the mounting protrusion and the ranging baffle is the distance between the two strip push plates. The distance between the two strip push plates after relative movement is preset according to the width of the paper to avoid excessive compression of the paper, which would lead to centering failure. In use, when the distance detected by the infrared ranging sensor reaches the set threshold, the first motor stops working. At this time, the paper can be centered on the top of the smooth plate.

[0011] Preferably, the bottom of the strip pusher plate is attached to the top of the smooth plate, and the length of the strip pusher plate is the same as the length of the smooth plate, so as to ensure that the strip pusher plate can push the paper.

[0012] Preferably, the conveying component includes a hollow column fixedly connected to the bottom of the movable plate. A spring is provided inside the hollow column to provide elastic support for the circular anti-detachment block, ensuring that the conveying component has a certain degree of flexibility and anti-detachment function during operation. A circular anti-detachment block is provided at the bottom of the spring to prevent the connecting rod from separating from the hollow column. A connecting rod is provided at the bottom of the circular anti-detachment block. The bottom end of the connecting rod passes through the bottom of the inner wall of the hollow column and is fixedly connected to a U-shaped plate. The U-shaped plate can move up and down to avoid excessive pressure on the paper and ensure that the conveying roller can smoothly push the paper toward the printing press.

[0013] Preferably, a conveying roller is rotatably connected between the front and rear sides of the inner wall of the U-shaped plate for pushing and conveying paper. The front end of the shaft of the conveying roller passes through the inner wall of the U-shaped plate and is coaxially connected to a double grooved wheel. The double grooved wheels of two adjacent conveying components are connected by a transmission belt to transmit power and enable the three conveying components to operate synchronously.

[0014] Preferably, a second motor is provided on the rear side of the U-shaped plate of one of the conveying components. The output shaft of the second motor is coaxially connected to the rear end of the rotating shaft of the conveying roller to provide power to the conveying roller and drive it to rotate to convey paper. Only one second motor is needed to drive the operation of three conveying components.

[0015] Preferably, the top of the U-shaped plate is provided with two positioning rods arranged symmetrically front and back. A circular tube is sleeved on the outer side of each of the two positioning rods. The top end of the circular tube is fixedly connected to the bottom of the movable plate, so that the U-shaped plate can move up and down stably and improve the overall stability of the conveying roller.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. The paper correction and conveying device of this printing press, by setting correction components on a smooth plate, uses a two-way lead screw in conjunction with a first motor to drive the strip moving plate to move, which in turn drives the strip push plate to move synchronously relative to each other or in opposite directions. This can accurately adjust the position of the paper. When the two strip push plates achieve precise distance control based on the feedback of the infrared distance sensor, it can effectively avoid paper deviation, achieve the centering of the paper, ensure that the paper is accurately conveyed to the printing press, and improve the aesthetics and consistency of the printed products.

[0018] 2. The paper correction and conveying device of this printing press, with the fixed longitudinal plate, electric telescopic rod and movable plate working together, can flexibly adjust the height of the conveying component according to the paper of different thicknesses, so that the conveying component and the paper are well matched. Through the elastic design of spring and circular anti-detachment block, the conveying component avoids applying too much pressure to the paper, ensuring the smoothness of the conveying process and adapting to paper of different specifications and materials.

[0019] 3. The paper correction and conveying device of this printing press uses a double grooved wheel and a drive belt to transmit power to the conveying rollers. Only one second motor is needed to drive all conveying components to operate synchronously, avoiding the complexity and high failure rate caused by the coordinated operation of multiple motors in traditional technology. The simplified power transmission structure not only reduces equipment costs but also improves the reliability of system operation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall first-view structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the overall second-view structure of this utility model;

[0022] Figure 3 This is a partial structural schematic diagram of the present invention;

[0023] Figure 4 This is a partial structural schematic diagram of the correction component in this utility model;

[0024] Figure 5 This is a schematic diagram of the conveyor structure in this utility model;

[0025] Figure 6 This is a schematic diagram of the conveying component structure in this utility model;

[0026] In the diagram: 1. U-shaped base; 2. Smooth plate; 20. Strip-shaped clearance opening; 3. Correction component; 30. Bidirectional lead screw; 31. First motor; 32. Strip-shaped moving plate; 320. Connecting block; 33. Strip-shaped push plate; 34. Mounting protrusion plate; 35. Infrared ranging sensor; 36. Ranging baffle; 4. Conveying component; 40. Fixed longitudinal plate; 41. Electric telescopic rod; 42. Movable plate; 43. Conveying component; 430. Hollow column; 431. Connecting rod; 432. Circular anti-detachment block; 433. Spring; 434. U-shaped plate; 435. Conveying roller; 436. Double grooved wheel; 437. Positioning rod; 438. Circular tube; 44. Second motor; 45. Drive belt. Detailed Implementation

[0027] 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.

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] Please see Figures 1-6 This utility model provides a technical solution:

[0030] The paper correction and conveying device of the printing press includes a U-shaped base 1, which provides an installation position for the correction component 3, the smooth plate 2 and the conveying component 4. The smooth plate 2 is provided inside the U-shaped base 1 and near the bottom, which facilitates the movement of the paper on the surface of the smooth plate 2. The correction component 3 is provided on the smooth plate 2 to correct the position of the paper and make the paper centered at the top of the smooth plate 2. The correction component 3 includes a bidirectional lead screw 30 rotatably connected between the front and rear sides of the inner wall of the U-shaped base 1. The correction component 3 also includes a first motor 31 for driving the bidirectional lead screw 30 to rotate. The first motor 31 is connected to an external power supply and a controller. The first motor 31 is installed on the front side of the U-shaped base 1 and drives the bidirectional lead screw 30 to rotate in both directions.

[0031] Two strip-shaped moving plates 32 are threaded onto the bidirectional lead screw 30. The top of the strip-shaped moving plates 32 is provided with multiple connecting blocks 320 arranged equidistantly from left to right. The front and rear sides of the smooth plate 2 are provided with strip-shaped clearance openings 20 for the connecting blocks 320 to pass through. The top of the multiple connecting blocks 320 is connected to a strip-shaped push plate 33. The two strip-shaped moving plates 32 are driven to move synchronously relative to each other or synchronously in opposite directions by the bidirectional lead screw 30. When the two strip-shaped moving plates 32 move synchronously relative to each other, the paper on the smooth plate 2 can be centered and positioned, thereby ensuring that the paper enters the printing press accurately.

[0032] A conveyor 4 is located inside the U-shaped base 1 and above the smooth plate 2. It is used to transport the centered paper to the printing press. The conveyor 4 includes two fixed longitudinal plates 40 arranged symmetrically on the left and right. The front and rear ends of the fixed longitudinal plates 40 are respectively fixedly connected to the front and rear sides of the inner wall of the U-shaped base 1. An electric telescopic rod 41 is provided at the middle of the top of each of the two fixed longitudinal plates 40. The electric telescopic rod 41 is connected to an external power supply and controller. The two electric telescopic rods 41 work synchronously. Through their telescopic movement, the movable plate 42 is moved up and down, thereby adjusting the height of the conveyor 43 to accommodate paper of different thicknesses. The movable rods of the two electric telescopic rods 41 are connected to the movable plate 42. The bottom of the movable plate 42 is provided with three conveyor 43 arranged equidistantly on the left and right. The two electric telescopic rods 41 drive the movable plate 42 to move up and down. When the movable plate 42 moves down, the conveyor 43 can contact the paper and transport the paper into the printing press.

[0033] In this embodiment, a mounting protrusion 34 is provided at the center of the bottom of the front strip moving plate 32 for mounting an infrared ranging sensor 35, providing it with a stable mounting position. An infrared ranging sensor 35 is provided on the rear side of the mounting protrusion 34, and a ranging baffle 36 is provided at the center of the bottom of the rear strip moving plate 32. The infrared ranging sensor 35 is used to detect the distance between the mounting protrusion 34 and the ranging baffle 36. The thickness of the infrared ranging sensor 35 itself is added when calculating the distance. The distance between the mounting protrusion 34 and the ranging baffle 36 is the distance between the two strip push plates 33. The distance between the two strip push plates 33 after relative movement is preset according to the width of the paper to avoid excessive compression of the paper and failure of centering positioning. In use, when the distance detected by the infrared ranging sensor 35 reaches the set threshold, the first motor 31 stops working. At this time, the paper can be centered on the top of the smooth plate 2.

[0034] Specifically, the bottom of the strip pusher 33 is attached to the top of the smooth plate 2, and the length of the strip pusher 33 is the same as the length of the smooth plate 2, ensuring that the strip pusher 33 can push the paper.

[0035] Furthermore, the conveying component 43 includes a hollow column 430 fixedly connected to the bottom of the movable plate 42. A spring 433 is provided inside the hollow column 430 to provide elastic support for the circular anti-detachment block 432, ensuring that the conveying component 43 has a certain degree of flexibility and anti-detachment function during operation. The bottom end of the spring 433 is provided with a circular anti-detachment block 432 to prevent the connecting rod 431 from separating from the hollow column 430. The bottom of the circular anti-detachment block 432 is provided with a connecting rod 431. The bottom end of the connecting rod 431 passes through the bottom of the inner wall of the hollow column 430 and is fixedly connected to a U-shaped plate 434. The U-shaped plate 434 can move up and down to avoid excessive pressure on the paper and ensure that the conveying roller 435 can smoothly push the paper toward the printing press.

[0036] Furthermore, a conveying roller 435 is rotatably connected between the front and rear sides of the inner wall of the U-shaped plate 434 for pushing and conveying paper. The front end of the rotating shaft of the conveying roller 435 passes through the inner wall of the U-shaped plate 434 and is coaxially connected to a double grooved wheel 436. The double grooved wheels 436 of two adjacent conveying components 43 are connected by a transmission belt 45. The adjacent double grooved wheels 436 are connected to transmit power so that the three conveying components 43 can operate synchronously.

[0037] Furthermore, a second motor 44 is provided on the rear side of the U-shaped plate 434 of one of the conveying components 43. The output shaft of the second motor 44 is coaxially connected to the rear end of the rotating shaft of the conveying roller 435, providing power to the conveying roller 435 and driving it to rotate to convey paper. Only one second motor 44 is needed to drive the operation of the three conveying components 43.

[0038] Furthermore, the top of the U-shaped plate 434 is provided with two positioning rods 437 arranged symmetrically front and back. A circular tube 438 is sleeved on the outside of each of the two positioning rods 437. The top end of the circular tube 438 is fixedly connected to the bottom of the movable plate 42, so that the U-shaped plate 434 can move up and down stably, improving the overall stability of the conveying roller 435.

[0039] In this embodiment, the paper alignment and conveying device of the printing press is used by placing the paper to be printed on top of the smooth plate 2. A first motor 31 drives a bidirectional lead screw 30 to rotate. The bidirectional lead screw 30, through a threaded connection, drives two strip-shaped moving plates 32 to move synchronously relative to each other. The strip-shaped moving plates 32, through multiple connecting blocks 320 at the top, drive strip-shaped push plates 33 to move. The strip-shaped push plates 33 slide on the smooth plate 2, pushing the paper to be centered and positioned. An infrared distance sensor 35 detects the distance between the strip-shaped push plates 33 in real time. When the detected distance reaches a preset value, the controller controls the first... When motor 31 stops working, the paper is centered. Then, the movable plate 42 is moved downward by the electric telescopic rod 41, adjusting the conveyor 43 to the height of contact with the paper. The conveyor 43 is provided with elastic support by the internal spring 433 and the circular anti-detachment block 432 to avoid applying excessive pressure to the paper. Driven by the second motor 44, the conveyor roller 435 realizes the synchronous operation of multiple conveyors 43 in the conveyor 4 through the double groove wheel 436 and the transmission belt 45, and smoothly conveys the centered paper into the printing press, completing the paper correction and conveying process.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A paper alignment and conveying device for a printing press, comprising a U-shaped base (1), characterized in that: A smooth plate (2) is provided inside the U-shaped base (1) and near the bottom. A correction component (3) is provided on the smooth plate (2). The correction component (3) includes a bidirectional lead screw (30) rotatably connected between the front and rear sides of the inner wall of the U-shaped base (1). The correction component (3) also includes a first motor (31) for driving the bidirectional lead screw (30) to rotate. The first motor (31) is installed on the front side of the U-shaped base (1). Two strip-shaped moving plates (32) are threadedly connected to the bidirectional lead screw (30). The top of the strip-shaped moving plates (32) is provided with multiple connecting blocks (320) arranged equidistantly from left to right. The smooth plate (2) The front and rear sides of the U-shaped base (1) are provided with strip-shaped clearance openings (20) for the connecting blocks (320) to pass through. The top of the multiple connecting blocks (320) are connected to a strip-shaped push plate (33). The U-shaped base (1) is provided with a conveying component (4) located inside and above the smooth plate (2). The conveying component (4) includes two fixed longitudinal plates (40) arranged symmetrically on the left and right. The middle of the top of the two fixed longitudinal plates (40) is provided with an electric telescopic rod (41). The movable rods of the two electric telescopic rods (41) are connected to a movable plate (42). The bottom of the movable plate (42) is provided with three conveying components (43) arranged equidistantly on the left and right.

2. The paper alignment and conveying device for a printing press according to claim 1, characterized in that: An mounting protrusion (34) is provided at the middle of the bottom of the front strip moving plate (32), an infrared ranging sensor (35) is provided on the rear side of the mounting protrusion (34), and a ranging baffle (36) is provided at the middle of the bottom of the rear strip moving plate (32).

3. The paper alignment and conveying device for a printing press according to claim 1, characterized in that: The bottom of the strip pusher (33) is attached to the top of the smooth plate (2), and the length of the strip pusher (33) is the same as the length of the smooth plate (2).

4. The paper alignment and conveying device for a printing press according to claim 1, characterized in that: The conveying component (43) includes a hollow column (430) fixedly connected to the bottom of the movable plate (42). A spring (433) is provided inside the hollow column (430). A circular anti-detachment block (432) is provided at the bottom end of the spring (433). A connecting rod (431) is provided at the bottom of the circular anti-detachment block (432). The bottom end of the connecting rod (431) passes through the bottom of the inner wall of the hollow column (430) and is fixedly connected to a U-shaped plate (434).

5. The paper alignment and conveying device for a printing press according to claim 4, characterized in that: A conveying roller (435) is rotatably connected between the front and rear sides of the inner wall of the U-shaped plate (434). The front end of the shaft of the conveying roller (435) passes through the inner wall of the U-shaped plate (434) and is coaxially connected to a double grooved wheel (436). The double grooved wheels (436) of two adjacent conveying components (43) are connected by a transmission belt (45).

6. The paper alignment and conveying device for a printing press according to claim 5, characterized in that: One of the conveying components (43) has a second motor (44) on the rear side of the U-shaped plate (434), and the output shaft of the second motor (44) is coaxially connected to the rear end of the rotating shaft of the conveying roller (435).

7. The paper alignment and conveying device for a printing press according to claim 4, characterized in that: The top of the U-shaped plate (434) is provided with two positioning rods (437) arranged symmetrically in front and behind. A circular tube (438) is sleeved on the outside of each of the two positioning rods (437), and the top end of the circular tube (438) is fixedly connected to the bottom of the movable plate (42).

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