Automatic ink fountain lifting device of photogravure press

Abstract

The utility model relates to the field of gravure printing equipment, and discloses an automatic ink fountain lifting device of a gravure printing machine, which comprises a frame, a support rod, a power source, an ink fountain, a rack, a zero switch and a controller. The rack is used for being installed on a printing roller and an ink fountain below the printing roller. The supporting rods are horizontally installed at the two ends of the bottom of the rack. The power source is connected with the end of the supporting rod and drives the supporting rod to rotate. The rack is fixedly installed at the bottom of the ink fountain, the supporting rod is sleeved with a gear, the rack is meshed with the gear, and the gear rotates to drive the rack to ascend and descend. The zero switch is connected with the power source, the ink fountain is provided with a zero position located at the bottom of the rack, and the zero switch is used for detecting whether the ink fountain is located at the zero position or not. The controller is electrically connected with the power source and the zero switch and used for receiving signals of the zero switch and controlling the stroke of the power source. The ink fountain lifting device solves the problem of inconvenience of manual hand-cranking lifting of the ink fountain of the photogravure press, and automatic and accurate adjustment can be achieved by being matched with a zero switch and a transmission structure.

Description

Technical Field

[0001] This utility model relates to the field of gravure printing equipment, and in particular to an automatic ink fountain lifting device for a gravure printing machine. Background Technology

[0002] Traditional gravure printing presses typically employ manual operation for their ink fountain lifting mechanisms, requiring operators to adjust the ink fountain height by cranking a handle. Due to the low installation position of the ink fountain, manual operation suffers from low efficiency, high labor intensity, and difficulty in controlling precision. Furthermore, in the event of an emergency stop or power failure, the ink fountain may remain in an unsafe position, posing a safety hazard. Current industry advancements in electrification primarily focus on single-drive structures, lacking systematic designs such as automatic zeroing, multi-unit coordination, and emergency stop linkage. Therefore, an automatically controlled, automatic ink fountain lifting device is needed. Summary of the Invention

[0003] This utility model addresses the shortcomings of existing technologies by providing an automatic ink fountain lifting device for a gravure printing machine.

[0004] To solve the above-mentioned technical problems, this utility model achieves its solution through the following technical solution:

[0005] An automatic ink fountain lifting device for a gravure printing machine includes a frame, support rods, a power source, an ink fountain, a rack, a zero-position switch, and a controller. The frame is installed on the printing roller and the ink fountain below it. The support rods are horizontally installed at both ends of the bottom of the frame. The power source is connected to the end of the support rods and drives them to rotate. The rack is fixedly installed at the bottom of the ink fountain, and a gear is fitted on the support rod. The rack meshes with the gear, and the rotation of the gear drives the rack to rise and fall. The zero-position switch is connected to the power source. The ink fountain has a zero position at the bottom of the frame, and the zero-position switch is used to detect whether the ink fountain is at the zero position. This device achieves automated control of the ink fountain height, replacing traditional manual adjustment, improving efficiency. The rack and gear meshing structure ensures lifting accuracy and reduces human error. The zero-position switch is linked to the controller to ensure that the ink fountain position automatically returns to zero, making each lifting position more precise and avoiding safety hazards during power outages or emergency stops.

[0006] Preferably, the controller is electrically connected to the power source and the zero-position switch, and is used to receive the signal from the zero-position switch and control the stroke of the power source.

[0007] Preferably, a control button is also included, which is connected to the controller and used to drive the power source.

[0008] Preferably, an emergency stop button is also included, connected to the controller, to provide the controller with a zero-point drive power source. The emergency stop button's linkage with the zero-position detection sensor ensures that the ink fountain automatically resets to its initial safe position in abnormal conditions. The emergency stop button's linkage with the zero-position switch also ensures that the ink fountain automatically resets to its initial safe position in abnormal conditions.

[0009] Preferably, the power source includes a stepper motor and a worm gear mechanism. The output shaft is designed to be perpendicular to the support rod, optimizing the spatial layout and reducing structural interference.

[0010] Preferably, the worm gear is mounted on the end of the support rod via a bearing to drive the support rod to rotate. The worm is the output shaft of the stepper motor or the output shaft of the stepper motor is connected to the worm. The output shaft of the stepper motor is perpendicular to the support rod.

[0011] Preferably, the output shaft of the stepper motor is connected to the worm shaft of the worm gear mechanism via a coupling. By integrating the stepper motor with the worm gear, electric drive replaces manual operation, improving adjustment accuracy and efficiency.

[0012] Preferably, a guide seat is provided between the frame and the support rod. The guide seat is fixed on the frame, and the gear and at least part of the rack are housed in the guide seat. The bottom of the rack passes through the frame and is limited by the frame.

[0013] Preferably, the printing press comprises multiple parallel printing units, several of which are equipped with ink fountains. 1. It supports multi-color printing or simultaneous multi-process printing, improving production efficiency; its modular design facilitates expansion and adapts to different printing needs.

[0014] Preferably, the controller is the main control system of the printing press. When the emergency stop button is triggered, the controller controls the power source of each printing unit to reverse until the ink fountain is at zero. All ink fountain execution units are synchronized through the main controller, and if any problem occurs, the ink fountain can be reset with one button. During an emergency stop, all units are uniformly controlled to return to zero, avoiding the risk of cascading failures caused by local faults. Centralized management reduces system complexity and improves collaborative efficiency.

[0015] This utility model, by adopting the above technical solution, has significant technical effects:

[0016] It solves the inconvenience of manually raising and lowering the ink fountain of gravure printing machines due to its low height, and can achieve automatic and precise adjustment by combining a zero-position switch and transmission structure;

[0017] Multiple ink fountain actuators are synchronized to stop and return to zero via a main controller, adapting to the ink fountain operation needs of different gravure printing units. This collaborative control improves efficiency and simplifies the control process for operators. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a front view of the present invention;

[0020] Figure 3 This is a schematic diagram of the automatic ink line lifting device;

[0021] Figure 4 This is a schematic diagram of the rear structure of the automatic ink line lifting device.

[0022] The parts referred to by the numbers in the above attached diagrams are as follows: 1. Frame; 11. Printing roller; 12. Guide seat; 2. Support rod; 3. Power source; 31. Stepper motor; 32. Worm gear; 33. Worm; 4. Ink fountain; 5. Rack; 51. Gear; 6. Zero position switch. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Example

[0024] An automatic ink fountain lifting device for a gravure printing machine, such as Figure 1-4As shown, the system includes a frame 1, a support rod 2, a power source 3, an ink fountain 4, a rack 5, a zero-position switch 6, and a controller. The frame 1 is used to install the ink fountain 4 below the printing roller 11. The support rod 2 is horizontally installed at both ends of the bottom of the frame 1. The power source 3 is connected to the end of the support rod 2 and drives the support rod 2 to rotate. The rack 5 is fixedly installed at the bottom of the ink fountain 4, and a gear 51 is sleeved on the support rod 2. The rack 5 meshes with the gear 51, and the rotation of the gear 51 drives the rack 5 to rise and fall. The zero-position switch 6 is connected to the power source 3. The ink fountain 4 has a zero position located at the bottom of the frame 1, and the zero-position switch 6 is used to move the ink fountain 4 to the zero position. The zero-position switch 6 can take several forms. One type uses an optical sensor, proximity switch, position sensor, displacement sensor, or other sensor installed at the bottom of the ink fountain 4 to determine the position of the ink fountain, combined with a switch button; pressing the switch button resets the position to zero. Another type uses a mechanical sensing structure; when the zero position touches the mechanical sensing position, the zero position is determined. For example, the power source can be equipped with zero-point detection. If the power source includes a motor, the zero point can be set using a voltage signal or a position sensor. When the motor reaches the zero-point position, the position sensor generates a signal. The zero-point detection sensor settings can be changed according to the preferences of those skilled in the art. There are two sensing methods for zero-position switches: one is an electrical zero point, which uses an electrical measuring element to measure a "0" position signal (such as the position signal digital measured by an encoder, electronic ruler, etc.). This electrical zero point is a number defined by the programmer relative to the mechanical zero point (the measuring element corresponding to the mechanical zero point can be used to fix the measuring element, and the two coincide). Sometimes the data measured by the measuring element corresponding to the mechanical zero point is a range (or the mechanical zero point and the electrical encoder's measured zero point are difficult to coincide), so the electrical measurement digital corresponding to the mechanical zero point can be used as the electrical zero point, and other actions are adjusted accordingly. The other type is a mechanical zero point, which is a machine reference zero point marked on the equipment with scales or similar instruments. Other equipment installations and operations are based on this reference zero point. This point serves as a reference position, primarily used as the mechanical zero point, generally marking the initial position of the machine's stopped state. The specific connection to the controller is not an inventive aspect of this invention and falls under conventional technology in the art, so it will not be elaborated upon here. Instead, it provides a zeroing signal to the power source 3. When at this zero position, a corresponding power source will receive the signal, indicating it is at the zero position of the ink marker 4. If not at the zero position, the power source continues operation until it reaches the zero position. The controller is a conventional PLC main controller or other conventional choice in the art. Its connection to components such as motors and sensors is a conventional technique in the art, and how to achieve control is not the technical problem this invention aims to solve, so it will not be elaborated upon here. The power source 3 is a common rotational power source in the art, which can be a motor, electric cylinder, pneumatic cylinder, or their linked synchronous belts, gears, lead screws, etc., as the power source.

[0025] The controller is electrically connected to the power source 3 and the zero-position switch 6, and is used to receive signals from the zero-position switch 6 and control the stroke of the power source 3. It also includes a control button, which is connected to the controller and used to drive the power source 3.

[0026] It also includes an emergency stop button, which connects to the controller and is used to provide the controller with the power source 3 to return to zero. The control buttons and emergency stop button can be physical buttons, or they can be parameter input interfaces on the touch screen, or a module of the touch screen.

[0027] The power source 3 includes a stepper motor 31 and a worm gear mechanism. The worm gear is just a relatively common helical gear meshing linkage method in the field, which can convert the rotation of the motor into the rotation of the worm gear, so that the rotation direction of the stepper motor 31 in the front-back direction of the output shaft is changed and converted into the rotation of the support rod 2 extending in the left-right direction. The shape of the worm gear and worm can be rod-shaped or wheel-shaped, and is not limited here.

[0028] The worm gear 32 is mounted on the end of the support rod 2 via a bearing to drive the support rod 2 to rotate. The worm 33 is the output shaft of the stepper motor 31 or the output shaft of the stepper motor 31 is connected to the worm 33. The output shaft of the stepper motor 31 is perpendicular to the support rod 2.

[0029] The output shaft of the stepper motor 31 is connected to the worm shaft 33 of the worm gear mechanism via a coupling.

[0030] A guide seat 12 is provided between the frame 1 and the support rod 2. The guide seat 12 is fixed on the frame 1. The gear 51 and at least part of the rack 5 are housed in the guide seat 12. The bottom of the rack 5 passes through the frame 1 and is limited by the frame 1.

[0031] The printing press contains multiple parallel printing units, some of which are equipped with ink fountains 4.

[0032] The controller is the main control system of the printing press. When the emergency stop button is triggered, the controller controls the power source 3 of each printing unit to reverse so that the ink fountain 4 is at zero position. Detailed Implementation

[0034] 1. In the initial state, the zero-position switch 6 detects whether the ink fountain 6 is in the zero position, and the ink fountain 6 is in the lowest safe position.

[0035] 2. After the operator inputs the plate diameter parameter through the printing press control panel, the controller calculates the number of rotations of the stepper motor 31 and drives the rack 5 to rise to the target height. When ink demand increases, printing speed increases, ink transfer rate decreases, or ink type / color is changed, the ink fountain needs to be raised. This raising of the ink fountain is operated by the corresponding control button on the control panel.

[0036] 3. When the equipment is under maintenance or shut down, when the ink scraping effect is abnormal, when the printing speed is reduced, or when the ink volume requirement is reduced, an emergency stop is triggered. The controller 8 cuts off the power and controls the stepper motor 13 of the power source to reverse, and the rack 5 descends to reset to the zero position.

[0037] 4. When multiple units work together, the main controller sends instructions in a unified manner, and each ink fountain execution unit synchronously completes the lifting or zeroing action.

[0038] In the description of this utility model, it should be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," 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 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall fall within the scope of the patent of the present utility model.

Claims

1. An automatic ink fountain lifting device for a gravure printing machine, characterized by, Comprising a rack (1) for mounting a printing roller (11) and an ink fountain (4) below the printing roller (11); a support rod (2) horizontally mounted at both ends of the bottom of the rack (1); a power source (3) connected to the ends of the support rod (2) and driving the support rod (2) to rotate; a rack (5) fixedly installed at the bottom of the ink fountain (4), a gear (51) is sleeved on the support rod (2), the rack (5) is engaged with the gear (51), and the gear (51) drives the rack (5) to rise and fall in rotation; a zero position switch (6) connected with the power source (3), the ink fountain (4) has a zero position at the bottom of the rack (1); a controller electrically connected with the power source (3) and the zero position switch (6), for receiving the signal of the zero position switch (6) and controlling the stroke of the power source (3).

2. An automatic ink fountain lifting device for a gravure printing machine according to claim 1, characterized in that: Further comprising a control button connected with the controller, for driving the power source (3) to act.

3. An automatic ink fountain lifting device for a gravure printing press according to claim 1, characterized in that: Further comprising an emergency stop button connected with the controller, for providing the controller to drive the power source (3) to zero.

4. An automatic ink fountain lifting device for a gravure printing press according to claim 1, characterized in that: The power source (3) comprises a stepping motor (31) and a worm and gear mechanism.

5. An automatic ink fountain lifting device for a photogravure printing machine according to claim 4, characterized in that: The worm gear (32) is arranged at the end of the support rod (2) through a bearing for driving the support rod (2) to rotate, the worm (33) is the output shaft of the stepping motor (31) or the output shaft of the stepping motor (31) is connected with the worm (33), and the output shaft of the stepping motor (31) is perpendicular to the support rod (2).

6. An automatic ink fountain lifting device for a photogravure printing machine according to claim 5, characterized in that: The output shaft of the stepping motor (31) is connected with the worm (33) of the worm and gear mechanism through a shaft coupling.

7. An automatic ink fountain lifting device for a gravure printing press according to claim 1, wherein: A guide seat (12) is arranged between the rack (1) and the support rod (2), the guide seat (12) is fixed on the rack (1), the gear (51) and at least part of the rack (5) are accommodated in the guide seat (12), the bottom of the rack (5) is arranged in the rack (1) and is limited by the rack (1).

8. An automatic ink fountain lifting device for a gravure printing press according to any one of claims 1 to 7, characterized in that: The printing machine comprises a plurality of parallel printing units, and some of the printing units are provided with ink fountains (4).

9. An automatic ink fountain lifting device for a photogravure printing machine according to claim 8, characterized in that: The controller is a main control system of the printing machine, and when the emergency stop button is triggered, the power source (3) of each printing unit is controlled by the controller to reverse to the zero position of the ink fountain (4).

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