Phase adjusting mechanism of paper feeding machine

Abstract

The utility model discloses a phase adjusting mechanism of a paper conveying machine, which relates to the technical field of phase adjustment of paper conveying machines and comprises a movable sliding block, a first movable chain wheel and a second movable chain wheel are arranged on the movable sliding block, and the first movable chain wheel and the second movable chain wheel are respectively connected to two sides of a clutch chain wheel through a chain. The movable sliding block is fixedly connected with a nut fixing seat, the nut fixing seat is in threaded connection with a screw rod, the screw rod is connected with a direct current motor, a limiting switch is arranged beside the screw rod, the movable sliding block is connected with a pull rope displacement sensor, and the limiting switch, the pull rope displacement sensor and the direct current motor are all connected to a digital display controller. The technical problem to be solved by the utility model is to provide the phase adjusting mechanism of the paper feeding machine, which can directly carry out accurate phase adjustment and provide good feedback without re-fastening a transmission part and restarting the machine.

Description

Technical Field

[0001] This utility model relates to the field of paper feeder phase adjustment technology, and specifically to a paper feeder phase adjustment mechanism. Background Technology

[0002] In high-speed printing, the paper needs to reach the front guide before the print head; otherwise, printing errors or paper jams will occur. Therefore, the paper feeder needs to adjust the time it takes for the paper to reach the front guide when it is in operation. This can usually be achieved by adjusting the position of the front guide or adjusting its delay time. The feeder's phase adjustment is a crucial step in ensuring correct paper alignment and timing during printing. Correct phase adjustment ensures that the paper enters the printing unit smoothly and accurately, avoiding registration errors or paper skew. Currently, the paper arrival time is usually delayed or advanced by reducing or increasing the feeder speed. However, adjusting the feeder speed currently requires shutting down the machine, disengaging the feeder from the main unit's transmission components, and then re-tightening the transmission components and restarting the machine after the feeder speed adjustment is complete. This entire process is time-consuming, thus reducing production efficiency. Utility Model Content

[0003] Technical problem to be solved by the utility model

[0004] The technical problem to be solved by this utility model is to provide a phase adjustment mechanism for a paper feeder that can directly perform precise phase adjustment and provide good feedback without the need to retighten the transmission components and restart the machine.

[0005] Technical solution

[0006] To solve the above problems, the technical solution provided by this utility model is as follows:

[0007] A paper feeder phase adjustment mechanism includes a movable slider, on which are mounted movable sprocket one and movable sprocket two positioned vertically. Movable sprocket one and movable sprocket two are respectively connected to both sides of a clutch sprocket via a chain. A nut fixing seat is fixedly connected to the movable slider, and a lead screw is threadedly connected to the nut fixing seat. A DC motor is connected to the lead screw, and a limit switch is provided next to the lead screw. A pull rope displacement sensor is connected to the movable slider, and the limit switch, pull rope displacement sensor, and DC motor are all connected to a digital display controller.

[0008] By controlling the vertical movement of the lead screw, the rotation angle of the clutch sprocket can be precisely adjusted, thereby regulating the phase of the paper feeder. A drawstring displacement sensor is mounted on the moving slider to measure its movement distance. A limit switch is located next to the lead screw to prevent the slider from exceeding a safe range. The digital display controller receives signals from the drawstring displacement sensor and the limit switch, and controls the operation of the DC motor based on these signals. Through feedback from the drawstring displacement sensor, the digital display controller can display the lead screw's movement distance in real time and calculate the paper's movement distance, ensuring the accuracy of phase adjustment.

[0009] Optionally, the digital display controller may include a screen.

[0010] The digital display controller features a screen, providing operators with an intuitive interface to monitor and adjust the operating status of the paper feeder's phase adjustment mechanism. The screen not only displays current parameters but also provides real-time feedback through graphical or digital means, helping users better understand and control the equipment's operation.

[0011] Optionally, the movable slider is located inside the wall panel of the paper feeder, and the nut fixing seat is located outside the wall panel of the paper feeder. The lead screw, the DC motor, the limit switch, and the pull rope displacement sensor connected to the nut fixing seat are all located outside the wall panel of the paper feeder.

[0012] Protecting internal moving parts: The sliding block is located inside the wall panel of the paper feeder, effectively preventing external dust, paper scraps, and other impurities from entering, reducing the risk of wear and malfunction. At the same time, its inner position also helps maintain the sliding block's movement accuracy, avoiding the influence of the external environment on phase adjustment.

[0013] Easy maintenance and monitoring: The nut holder, lead screw, DC motor, limit switch, and pull rope displacement sensor are all located on the outside of the wall panel, making these components easier to access and maintain. Operators can inspect, adjust, or replace parts without opening the paper feeder, reducing downtime and improving maintenance efficiency.

[0014] Simplified installation: The centralized arrangement of external components makes installation simpler, especially when frequent adjustments or replacements of components such as motors and sensors are required. There is no need to disassemble other parts of the paper feeder, reducing the difficulty of installation.

[0015] Optionally, fixed sliders are provided on both sides of the movable slider, and fixed sprockets are provided on the fixed sliders. The movable sprocket one and the movable sprocket two are first connected to the fixed sprockets by a chain. An adjusting screw is provided inside the fixed slider, and part of the fixed sprockets are movably connected to the fixed slider and the rotating shaft abuts against the adjusting screw.

[0016] The fixed slider contains an adjusting screw, with the shaft of a portion of the fixed sprocket abutting against it. By rotating the adjusting screw, the position of the fixed sprocket can be changed, thereby adjusting the chain tension. This design allows operators to fine-tune the chain tension without disassembling the equipment, ensuring the chain is always in optimal condition. This is crucial for maintaining the long-term stability and accuracy of the system, especially during extended operation or in environments with significant changes.

[0017] Optionally, the lead screw is rotatably connected to a fixed base via a bearing, and the fixed base is installed on the outside of the wall panel of the paper feeder.

[0018] The lead screw is rotatably connected to the fixed base via bearings, which allows the lead screw to maintain high precision and low friction during rotation. The fixed base is installed on the outside of the paper feeder wall panel, which allows components such as the lead screw, DC motor, limit switches, and pull rope displacement sensor to be concentrated on the outside of the wall panel for easy maintenance and monitoring. At the same time, the design of the fixed base should ensure that it has sufficient strength and rigidity to withstand the rotational torque of the lead screw and external loads.

[0019] Optionally, the end of the lead screw is provided with a bevel gear that meshes with the bevel gear at the output end of the DC motor, and the DC motor is horizontally positioned.

[0020] One of the main advantages of bevel gear drives is their ability to change the direction of power transmission, typically by 90 degrees. In this design, the DC motor is mounted horizontally, with its output shaft perpendicular to the axis of the lead screw. Through the meshing of the bevel gears, the motor's rotational motion is effectively transmitted to the lead screw, enabling its rotation. Because the DC motor is mounted horizontally, the overall height of the drive system can be significantly reduced, making the entire mechanism more compact.

[0021] Optionally, two limit switches are provided, each set at the extreme position of the nut fixing seat on the lead screw.

[0022] Two limit switches are installed on the upper and lower limit positions of the nut fixing seat on the lead screw, respectively, to ensure that the slider does not exceed the set safety range when moving up and down. When the slider approaches either limit position, the corresponding limit switch will be triggered, and the controller will immediately stop the motor to prevent the slider from continuing to move and avoid mechanical failure or damage caused by overshoot.

[0023] Optionally, the digital display controller is located on the outside of the wall panel of the paper feeder.

[0024] It makes it easier for operators to observe.

[0025] Beneficial effects

[0026] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0027] No need to retighten transmission components:

[0028] Traditional phase adjustment usually requires stopping the machine and readjusting and tightening the transmission components. However, this design, through screw drive and sprocket transmission, can perform phase adjustment without stopping the machine, which greatly improves production efficiency.

[0029] Precise phase adjustment:

[0030] Through the precise movement of the lead screw and the feedback from the rope displacement sensor, very precise phase adjustment can be achieved, ensuring synchronization between the paper feeder and the main machine.

[0031] Real-time feedback and control:

[0032] The digital display controller can adjust the motor's operation in real time based on sensor feedback, ensuring the accuracy and stability of phase adjustment. Simultaneously, operators can visually view the phase adjustment results through the controller, facilitating monitoring and adjustment.

[0033] High security:

[0034] The limit switch ensures that the slider does not exceed the safe range, avoiding mechanical failure or damage caused by excessive movement.

[0035] High degree of automation:

[0036] The entire phase adjustment process can be completed automatically by a digital display controller, reducing the need for manual intervention and improving the system's level of automation. Attached Figure Description

[0037] Figure 1 A schematic diagram of the outer side of the wall panel of a paper feeder phase adjustment mechanism according to an embodiment of this utility model;

[0038] Figure 2 A schematic diagram of the phase adjustment section of a paper feeder phase adjustment mechanism, as proposed in an embodiment of this utility model;

[0039] Figure 3 A schematic diagram of the inner wall panel of a paper feeder phase adjustment mechanism according to an embodiment of this utility model;

[0040] Figure 4 A cross-sectional schematic diagram of the moving sprocket of a paper feeder phase adjustment mechanism provided in an embodiment of this utility model;

[0041] Figure 5A cross-sectional schematic diagram of the fixed sprocket of a paper feeder phase adjustment mechanism according to an embodiment of the present invention;

[0042] Figure 6 A cross-sectional schematic diagram of the clutch sprocket of a paper feeder phase adjustment mechanism proposed in an embodiment of this utility model;

[0043] 1. Wall panel; 2. Input sprocket; 3. Output sprocket; 4. Phase adjustment unit; 5. DC motor; 6. Bevel gear; 7. Fixed base; 8. Lead screw; 9. Limit switch; 10. Pull rope displacement sensor; 11. Clutch sprocket; 12. Transition sprocket; 13. Fixed sprocket one; 14. Fixed sprocket two; 15. Moving sprocket one; 16. Fixed sprocket three; 17. Fixed sprocket four; 18. Moving sprocket two; 19. Fixed slider; 20. Moving slider; 21. Nut fixing base; 22. Nut; 23. Clutch; 24. Digital display controller. Detailed Implementation

[0044] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0045] Example

[0046] Combined with appendix Figure 1 , 2 A paper feeder phase adjustment mechanism is disclosed, comprising components mounted on a wall panel 1. A lead screw 8 is rotatably connected to a fixed base 7 via bearings, and the fixed base 7 is mounted on the outside of the wall panel 1 of the paper feeder. A bevel gear 6 is provided at the end of the lead screw 8 and meshes with the bevel gear 6 at the output end of a DC motor 5, which is horizontally positioned. The DC motor 5 is supported by a bracket and fixed to the wall panel 1. A digital display controller 24 is located on the outside of the wall panel 1 of the paper feeder.

[0047] Combined with appendix Figure 2 Two limit switches 9 are provided, one on the upper limit position of the nut 22 fixing seat 217 on the lead screw 8, and the other on the lower limit position of the nut 22 fixing seat 217 on the lead screw 8. One limit switch 9 is installed at the upper limit position of the nut 22 fixing seat 217 on the lead screw 8 to detect the upper limit position of the slider when it moves upward. When the slider approaches the upper limit position, the limit switch 9 is triggered, and the controller stops the motor from rotating forward (i.e., moving upward). The other limit switch 9 is installed at the lower limit position of the nut 22 fixing seat 217 on the lead screw 8 to detect the lower limit position of the slider when it moves downward. When the slider approaches the lower limit position, the limit switch 9 is triggered, and the controller stops the motor from rotating in reverse (i.e., moving downward).

[0048] Combined with appendix Figure 3The movable slider 20 is equipped with movable sprocket 15 and movable sprocket 28 located at opposite ends. Movable sprocket 15 and movable sprocket 28 are respectively connected to both sides of the clutch sprocket 11 by a chain. Fixed sliders 19 are located on both sides of the movable slider 20, and fixed sprockets are mounted on the fixed sliders 19. Movable sprocket 15 and movable sprocket 28 are first connected to the fixed sprockets by chains. The fixed sprockets are divided into fixed sprocket 13, fixed sprocket 24, fixed sprocket 36, and fixed sprocket 47. Movable sprocket 15 is located on top, and movable sprocket 28 is located on the bottom. The chain is fitted onto the clutch sprocket 11. The chain above the clutch sprocket 11 starts from the clutch sprocket 11 and passes sequentially through the fixed sprocket 2 14, the movable sprocket 15, and the fixed sprocket 13, and then passes through two transition sprockets 12 to connect to the input sprocket 2. The chain below the clutch sprocket 11 starts from the clutch sprocket 11 and passes sequentially through the fixed sprocket 4 17, the movable sprocket 2 18, and the fixed sprocket 3 16, and then passes through two transition sprockets 12 to connect to the input sprocket 2.

[0049] Combined with appendix Figure 2 , 4 The movable slider 20 is fixedly connected to a nut 22 and a fixing seat 217. The nut 22 and fixing seat 217 are threadedly connected to a lead screw 8. The lead screw 8 is connected to a DC motor 5. A limit switch 9 is provided next to the lead screw 8. The movable slider 20 is connected to a pull rope displacement sensor 10. The limit switch 9, the pull rope displacement sensor 10, and the DC motor 5 are all connected to a digital display controller 24. The digital display controller 24 is equipped with a screen.

[0050] The movable slider 20 is located inside the wall panel 1 of the paper feeder, and the nut 22 fixing seat 217 is located outside the wall panel 1 of the paper feeder. The lead screw 8, DC motor 5, limit switch 9 and pull rope displacement sensor 10 connected to the nut 22 fixing seat 217 are all located outside the wall panel 1 of the paper feeder.

[0051] Combined with appendix Figure 5 The fixed slider 19 is equipped with an adjusting screw. Fixed sprocket 3 16 and fixed sprocket 4 17 are movably connected to the fixed slider 19. The rotating shafts of fixed sprocket 3 16 and fixed sprocket 4 17 abut against the adjusting screw.

[0052] Combined with appendix Figure 6 The clutch sprocket 11 is axially connected to the clutch 23, and the other side of the clutch 23 is the output sprocket 3. The clutch 23 is fixed on the wall plate 1.

[0053] Working principle:

[0054] A DC motor 5 drives a lead screw 8 to rotate, and the lead screw 8 is threadedly connected to a nut 22 fixing seat 217. When the lead screw 8 rotates, the nut 22 fixing seat 217 moves up and down along the lead screw 8, causing the entire movable slider 20 to move up and down. The movable slider 20 has two sprockets: movable sprocket one 15 and movable sprocket two 18, located at the upper and lower ends of the slider, respectively. These two sprockets are connected to both sides of the clutch sprocket 11 via a chain. When the movable slider 20 moves up and down, the position of the sprockets changes, resulting in a difference in chain length. Since the chain is rigid, the change in chain length forces the clutch sprocket 11 to rotate at a certain angle. The rotation angle of the clutch sprocket 11 directly determines the phase relationship between the paper feeder and the main machine. By controlling the up and down movement distance of the lead screw 8, the rotation angle of the clutch sprocket 11 can be precisely adjusted, thereby achieving phase adjustment of the paper feeder. A drawstring displacement sensor 10 is installed on the movable slider 20 to measure the slider's movement distance. A limit switch 9 is located next to the lead screw 8 to prevent the slider from exceeding the safe range. The digital display controller 24 receives signals from the drawstring displacement sensor 10 and the limit switch 9, and controls the operation of the DC motor 5 based on these signals. Through feedback from the drawstring displacement sensor 10, the digital display controller 24 can display the real-time movement distance of the lead screw 8 and calculate the paper movement distance, ensuring the accuracy of phase adjustment.

[0055] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A phase adjustment mechanism for a paper feeder, characterized in that, The device includes a movable slider, on which are mounted movable sprocket one and movable sprocket two positioned vertically. Movable sprocket one and movable sprocket two are respectively connected to both sides of a clutch sprocket via a chain. The movable slider is fixedly connected to a nut fixing seat, and a lead screw is threaded onto the nut fixing seat. The lead screw is connected to a DC motor, and a limit switch is located next to the lead screw. A pull rope displacement sensor is connected to the movable slider, and the limit switch, pull rope displacement sensor, and DC motor are all connected to a digital display controller.

2. The paper feeder phase adjustment mechanism according to claim 1, characterized in that, The digital display controller is equipped with a screen.

3. The paper feeder phase adjustment mechanism according to claim 1, characterized in that, The movable slider is located inside the wall panel of the paper feeder, and the nut fixing seat is located outside the wall panel of the paper feeder. The lead screw, the DC motor, the limit switch and the pull rope displacement sensor connected to the nut fixing seat are all located outside the wall panel of the paper feeder.

4. The paper feeder phase adjustment mechanism according to claim 1, characterized in that, The movable slider has fixed sliders on both sides, and fixed sprockets are provided on the fixed sliders. The movable sprocket one and the movable sprocket two are first connected to the fixed sprockets by a chain. An adjusting screw is provided inside the fixed slider, and part of the fixed sprockets are movably connected to the fixed slider and the rotating shaft abuts against the adjusting screw.

5. A paper feeder phase adjustment mechanism according to claim 1, characterized in that, The lead screw is rotatably connected to the fixed seat via a bearing, and the fixed seat is installed on the outside of the wall panel of the paper feeder.

6. A paper feeder phase adjustment mechanism according to claim 5, characterized in that, The end of the lead screw is provided with a bevel gear that meshes with the bevel gear at the output end of the DC motor, and the DC motor is horizontally positioned.

7. A paper feeder phase adjustment mechanism according to claim 1, characterized in that, Two limit switches are provided, each set at the extreme position of the nut fixing seat on the lead screw.

8. A paper feeder phase adjustment mechanism according to claim 1, characterized in that, The digital display controller is located on the outside of the wall panel of the paper feeder.

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