Photoelectric-induction-based tail paper collection lifting device of lithographic printing machine

Abstract

The utility model discloses a photoelectricity induction-based lithographic printing machine tail paper collection lifting device, and relates to the technical field of printing machine accessories, the photoelectricity induction-based lithographic printing machine tail paper collection lifting device comprises a bottom plate, four corners of the bottom plate are fixedly connected with sliding rods, the outer walls of the sliding rods are slidably connected with a bearing plate, the top ends of the sliding rods are provided with driving devices, and the driving devices are connected with the bearing plate. The driving device is arranged, the photoelectric sensor installed in the device can accurately detect the stacking height of the paper in real time, the top position of a paper pile is sensed by transmitting and receiving optical signals, the signals are rapidly transmitted to the single chip microcomputer, and the single chip microcomputer is used for controlling the height of the paper. And when the paper is stacked, the servo motor is instructed to drive the adjusting screw rod to drive the bearing plate to move up and down along the sliding rod, so that the paper stacking height is accurately adjusted, the paper is always located at a proper position, the paper collecting process is stable and efficient, manual intervention is greatly reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of printing press accessories technology, specifically to a tail paper delivery lifting device for a lithographic printing press based on photoelectric sensing. Background Technology

[0002] Traditional paper delivery lifting devices at the tail end of offset printing presses suffer from numerous limitations that restrict production efficiency and product quality. In terms of detecting and adjusting paper stacking height, traditional devices lack effective automation methods, relying mostly on manual observation of the paper stacking and manual operation of the equipment for lifting and adjusting. This method is not only inefficient and time-consuming, but also prone to significant errors in human judgment, making it difficult to accurately perceive the paper stacking height in real time. Furthermore, traditional devices are ineffective in paper side-limiting and correction functions. During the stacking process, there are no efficient correction methods for unevenness on both sides of the stacked paper, resulting in uneven paper stacks. This not only affects the appearance quality of the printed products but may also cause more problems in subsequent binding, cutting, and other processing stages, reducing product qualification rates and the company's economic benefits.

[0003] Against this backdrop, this utility model proposes a photoelectric sensing-based tail paper delivery lifting device for offset printing presses, aiming to solve the aforementioned drawbacks of traditional devices. Through innovative structural design and automated control methods, it achieves precise paper positioning, intelligent height adjustment, and efficient side limit and correction functions, thereby improving the overall performance and production efficiency of offset printing presses. Utility Model Content

[0004] To address the shortcomings of existing technologies, the technical solution adopted by this utility model is as follows: A photoelectric sensing-based tail-end paper receiving lifting device for a offset printing press includes: a base plate, with slide rods fixedly connected to the four corners of the base plate; a support plate slidably connected to the outer wall of the slide rods; a driving device at the top of the slide rods, used to identify the paper height and control the height of the support plate; a limiting device on the outer wall of the support plate, used to correct the position of the paper on the support plate; the driving device includes a sliding plate, with fixed plates symmetrically slidably connected to the outer wall of the sliding plate; a servo motor fixedly connected to the outer wall of the fixed plate; an adjusting screw fixedly connected to the output end of the servo motor; and a baffle fixedly connected to the outer wall of the sliding plate. The adjusting screw is threadedly connected to the inner wall of the support plate. When the servo motor rotates, the adjusting screw drives the support plate to move up and down along the slide rods, thereby adjusting the height of the paper stack and ensuring that the paper is always in the appropriate position.

[0005] Preferably, the outer wall of the fixed plate is fixedly connected to the outer wall of the slide rod, the outer wall of the adjusting screw is threadedly connected to the inner wall of the bearing plate, and the bottom end of the adjusting screw is rotatably connected to the outer wall of the base plate. Positioning holes are provided in the walls of both the fixed plate and the slide plate, and positioning pins are slidably connected to the inner walls of the positioning holes. The position of the slide plate is adjusted according to the width of the paper. After adjustment, the positioning pin is inserted into the positioning hole to limit the position of the slide plate, ensuring that the paper is blocked by the baffle on the bearing plate, restricting its position and ensuring the neatness of the paper stack.

[0006] Preferably, a microcontroller is fixedly connected to the outer wall of the fixing plate, and a photoelectric sensor is fixedly connected to the outer wall of the sliding plate. The photoelectric sensor is installed in the device to detect the height of the paper stack in real time. The photoelectric sensor senses the top position of the paper stack by emitting and receiving light signals and transmits the signal to the microcontroller. After receiving the signal from the photoelectric sensor, the microcontroller determines whether the current paper height has reached the required adjustment position according to a preset program. If the paper stack is too high or too low, the microcontroller will issue a command to control the servo motor. The photoelectric sensor is an EE-SX670 infrared photoelectric sensor, and the microcontroller is an STM32 series microcontroller.

[0007] Preferably, the limiting device includes a bidirectional screw, the outer wall of which is threadedly connected to a limiting plate. A guide post is fixedly connected to the outer wall of the limiting plate, and a movable plate is slidably connected to the outer wall of the guide post. A correction plate is fixedly connected to the top of the movable plate. The bidirectional screw rotates to drive the limiting plate to slide on the support plate, thereby adjusting the position of the limiting plate. The limiting plate is used to limit the sides of the paper, preventing the paper from shifting during stacking.

[0008] Preferably, the outer wall of the bidirectional screw is rotatably connected to the outer wall of the bearing plate, the outer wall of the limiting plate is slidably connected to the inner wall of the bearing plate, and a return spring is fixedly connected to the outer wall of the guide post. The other end of the return spring is fixedly connected to the outer wall of the moving plate. The drive motor drives the eccentric wheel to rotate, causing it to slide on the outer wall of the moving plate, so that the moving plate slides on the guide post. Under the action of the return spring, it continuously moves and resets, and drives the correction plate to move. Since the maximum moving distance of the correction plate is flush with the moving plate, it pushes back any paper that exceeds the moving plate, thereby ensuring the neatness of the paper stack.

[0009] Preferably, a drive motor is fixedly connected to the outer wall of the limiting plate, and an eccentric wheel is fixedly connected to the output end of the drive motor. The eccentric wheel is slidably connected to the outer wall of the moving plate.

[0010] The beneficial effects of this utility model are as follows:

[0011] 1. This utility model, through the setting of a driving device, incorporates a photoelectric sensor that can detect the paper stacking height in real time and with precision. It senses the top position of the paper stack by emitting and receiving light signals and quickly transmits the signals to a microcontroller. The microcontroller determines the paper height according to a preset program; when the height is abnormal, it immediately instructs a servo motor to operate. The servo motor drives an adjusting screw, causing the support plate to move up and down along a slide bar, achieving precise adjustment of the paper stacking height. This ensures the paper is always in a suitable position, guaranteeing a stable and efficient paper collection process, greatly reducing manual intervention and improving production efficiency.

[0012] 2. This utility model, by setting a limiting device, allows the bidirectional screw to rotate, enabling the limiting plate to slide flexibly on the support plate, easily adjusting the position of the limiting plate and effectively limiting the side of the paper to prevent the paper from shifting during stacking. The drive motor drives the eccentric wheel to rotate, and the eccentric wheel slides on the outer wall of the moving plate, causing the moving plate to slide on the guide post. Combined with the return spring, the moving plate continuously resets and moves, thereby driving the correction plate to move. The correction plate can push back any paper that exceeds the moving plate, ensuring that the stacked paper is neat on both sides, avoiding uneven paper that would affect subsequent processing, and effectively improving product quality. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the drive device structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the limiting device of this utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the correction plate of this utility model;

[0017] Figure 5 This is a system block diagram of this utility model.

[0018] In the diagram: 1. Base plate; 2. Slide rod; 3. Bearing plate; 4. Drive device; 41. Slide plate; 42. Fixing plate; 43. Servo motor; 44. Adjusting screw; 45. Baffle; 46. Microcontroller; 47. Photoelectric sensor; 48. Positioning hole; 49. Positioning pin; 5. Limiting device; 51. Bidirectional screw; 52. Limiting plate; 53. Guide post; 54. Moving plate; 55. Correcting plate; 56. Return spring; 57. Drive motor; 58. Eccentric wheel. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose. Example

[0020] Please see Figure 1 - Figure 5 This utility model provides a technical solution: a photoelectric sensing-based tail paper receiving lifting device for a flatbed printing press, comprising: a base plate 1, with slide rods 2 fixedly connected to the four corners of the base plate 1, a bearing plate 3 slidably connected to the outer wall of the slide rods 2, a driving device 4 at the top of the slide rods 2, the driving device 4 being used to identify the paper height and control the height of the bearing plate 3, a limiting device 5 being provided on the outer wall of the bearing plate 3, the limiting device 5 being used to correct the position of the paper on the bearing plate 3; the driving device 4 includes a slide plate 41, with a fixed plate 42 symmetrically slidably connected to the outer wall of the slide plate 41, a servo motor 43 fixedly connected to the outer wall of the fixed plate 42, an adjusting screw 44 fixedly connected to the output end of the servo motor 43, and a baffle 45 fixedly connected to the outer wall of the slide plate 41.

[0021] The outer wall of the fixed plate 42 is fixedly connected to the outer wall of the slide rod 2. The outer wall of the adjusting screw 44 is threadedly connected to the inner wall of the bearing plate 3. The bottom end of the adjusting screw 44 is rotatably connected to the outer wall of the base plate 1. Positioning holes 48 are provided in the walls of both the fixed plate 42 and the slide plate 41. Positioning pins 49 are slidably connected to the inner wall of the positioning holes 48.

[0022] A microcontroller 46 is fixedly connected to the outer wall of the fixed plate 42, and a photoelectric sensor 47 is fixedly connected to the outer wall of the slide plate 41.

[0023] The limiting device 5 includes a bidirectional screw 51, a limiting plate 52 is threadedly connected to the outer wall of the bidirectional screw 51, a guide post 53 is fixedly connected to the outer wall of the limiting plate 52, a movable plate 54 is slidably connected to the outer wall of the guide post 53, and a correction plate 55 is fixedly connected to the top of the movable plate 54.

[0024] The outer wall of the bidirectional screw 51 is rotatably connected to the outer wall of the bearing plate 3, the outer wall of the limiting plate 52 is slidably connected to the inner wall of the bearing plate 3, and a return spring 56 is fixedly connected to the outer wall of the guide post 53. The other end of the return spring 56 is fixedly connected to the outer wall of the moving plate 54.

[0025] A drive motor 57 is fixedly connected to the outer wall of the limiting plate 52, and an eccentric wheel 58 is fixedly connected to the output end of the drive motor 57. The eccentric wheel 58 is slidably connected to the outer wall of the moving plate 54.

[0026] Working principle:

[0027] In use, the position of the slide plate 41 is adjusted according to the width of the paper by the drive device 4. After adjustment, the position of the slide plate 41 is limited by the positioning pin 49 inserted into the positioning hole 48, so that the paper is blocked by the baffle 45 on the support plate 3, limiting its position and ensuring the neatness of the paper stack. A photoelectric sensor 47 is installed in the device to detect the height of the paper stack in real time. The photoelectric sensor 47 senses the top position of the paper stack by emitting and receiving light signals and transmits the signal to the microcontroller 46. After receiving the signal from the photoelectric sensor 47, the microcontroller 46 determines whether the current paper height has reached the position that needs to be adjusted according to the preset program. If the paper stack is too high or too low, the microcontroller 46 will issue a command to control the servo motor 43 to work. The servo motor 43 drives the support plate 3 to rise and fall through the adjusting screw 44. The adjusting screw 44 is threadedly connected to the inner wall of the support plate 3. When the servo motor 43 rotates, the adjusting screw 44 drives the support plate 3 to move up and down along the slide bar 2, thereby adjusting the height of the paper stack and ensuring that the paper is always in the appropriate position.

[0028] Through the limiting device 5, the bidirectional screw 51 rotates and drives the limiting plate 52 to slide on the bearing plate 3, thereby adjusting the position of the limiting plate 52. The limiting plate 52 is used to limit the side of the paper to prevent the paper from shifting during the stacking process. In order to prevent the stacked paper from being uneven on both sides, the drive motor 57 drives the eccentric wheel 58 to rotate, so that it slides on the outer wall of the moving plate 54, so that the moving plate 54 slides on the guide post 53, and under the action of the return spring 56, it moves and resets continuously, and drives the correction plate 55 to move. Since the maximum moving distance of the correction plate 55 is flush with the moving plate 54, the paper that exceeds the moving plate 54 is pushed back, thereby ensuring the neatness of the paper stack.

[0029] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A photovoltaic-sensing based lithographic tailer lift comprising: The bottom plate (1), the four corners of the bottom plate (1) are fixedly connected with slide rods (2), the outer walls of the slide rods (2) are slidably connected with bearing plates (3), characterized in that the top ends of the slide rods (2) are provided with driving devices (4), the driving devices (4) are used for identifying the height of paper and controlling the height of the bearing plates (3), the outer walls of the bearing plates (3) are provided with limiting devices (5), and the limiting devices (5) are used for position deviation correction of paper on the bearing plates (3). The driving device (4) comprises slide plates (41), the outer walls of the slide plates (41) are symmetrically and slidably connected with fixed plates (42), the outer walls of the fixed plates (42) are fixedly connected with servo motors (43), the output ends of the servo motors (43) are fixedly connected with adjusting screws (44), and the outer walls of the slide plates (41) are fixedly connected with baffle plates (45).

2. A photovoltaic sensing based tail lift for a lithographic printing press according to claim 1, characterized in that: The outer wall of the fixed plate (42) is fixedly connected with the outer wall of the slide rod (2), the outer wall of the adjusting screw (44) is threadedly connected with the inner wall of the bearing plate (3), the bottom end of the adjusting screw (44) is rotatably connected with the outer wall of the bottom plate (1), and the walls of the fixed plate (42) and the slide plate (41) are both provided with positioning holes (48), and the inner wall of the positioning hole (48) is slidably connected with a positioning pin (49).

3. A photovoltaic sensing based tail lift for a lithographic printing press as claimed in claim 1, characterized in that: The outer wall of the fixed plate (42) is fixedly connected with a single-chip microcomputer (46), and the outer wall of the slide plate (41) is fixedly connected with a photoelectric sensor (47).

4. A photovoltaic sensing based tail lift for a lithographic printing press as claimed in claim 1, characterized in that: The limiting device (5) comprises a bidirectional screw rod (51), the outer wall of the bidirectional screw rod (51) is threadedly connected with a limiting plate (52), the outer wall of the limiting plate (52) is fixedly connected with a guide column (53), the outer wall of the guide column (53) is slidably connected with a moving plate (54), and the top end of the moving plate (54) is fixedly connected with a deviation correction plate (55).

5. A photovoltaic sensing based tail lift for a lithographic printing press as claimed in claim 4, characterized in that: The outer wall of the bidirectional screw rod (51) is rotatably connected with the outer wall of the bearing plate (3), the outer wall of the limiting plate (52) is slidably connected with the inner wall of the bearing plate (3), the outer wall of the guide column (53) is fixedly connected with a return spring (56), and the other end of the return spring (56) is fixedly connected with the outer wall of the moving plate (54).

6. A photovoltaic sensing based tail lift for a lithographic printing press as claimed in claim 5, characterized in that: The outer wall of the limiting plate (52) is fixedly connected with a driving motor (57), the output end of the driving motor (57) is fixedly connected with an eccentric wheel (58), and the eccentric wheel (58) is slidably connected with the outer wall of the moving plate (54).

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