Automatic plate changing device for printing press

Abstract

The utility model relates to the technical field of printing machine discloses a printing machine automatic change edition device, include: bearing seat, main shaft and printing roller, two between the bearing seat are equipped with main shaft, the outer wall both sides of main shaft are fixed with end plate, the outer periphery of end plate is equipped with U type groove, be equipped with printing roller between U type groove, be equipped with the pressing block in the inside of U type groove and be located printing roller top, the central part of end plate one end is equipped with the threaded bush, the outside of threaded bush is equipped with the location bush, the utility model discloses through the interference fit of upper pressing block and U type groove and carries out the preliminary fixation of printing roller, then through the screwing of location bush and threaded bush, make the location bush cover in the outside of end plate, through the further location of location bush to upper pressing block, guarantee printing roller connection stable, when disassembling, only need to unscrew screw location bush, pull out upper pressing block to realize the disassembly of printing roller, and printing roller installation disassembly is convenient.

Description

Technical Field

[0001] This utility model relates to the field of printing press technology, specifically to an automatic plate changing device for a printing press. Background Technology

[0002] Automatic plate changing devices for printing presses are core components in modern printing equipment used for automated plate changing. Their core function is to enable the rapid and precise installation and removal of printing plates through mechanical, electrical, or pneumatic systems, thereby reducing manual intervention, shortening downtime, and improving printing efficiency.

[0003] For example, an existing Chinese patent (CN222522254U) discloses an automatic plate-changing device for a printing press, including a fixed frame, a printing roller, and a roller frame. A meter counter is fixedly connected to one side of the fixed frame, and a motor is fixedly connected to the other side. Fixed rods are connected to one side of the motor and the inner wall of the fixed frame. A positioning bolt is movably installed at one end of each fixed rod. The roller frame is movably installed on the side of the fixed rod closest to it. A meter counter sensor is fixedly connected to one side of the roller frame, and the printing roller is connected to one side of the meter counter sensor. Connecting rods are fixedly connected to both sides of the printing roller, and the connecting rods engage with the fixed rods. This application, through the coordinated use of the motor, meter counter sensor, roller frame, and printing roller, can automatically and quickly change plates according to the set printing length, eliminating the need for manual operation by staff, saving manpower and time, and improving work efficiency.

[0004] The installation and disassembly of the printing roller and the roller frame in the existing technical solution is inconvenient. Although the roller frame is designed with a multi-roller integrated layout and usually has 4-8 sets of printing rollers to meet the needs of multi-color printing or composite processes, the printing roller is not easy to disassemble when it is necessary to replace or repair a specific printing roller during actual production and maintenance. Utility Model Content

[0005] The purpose of this invention is to provide an automatic plate changing 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: an automatic plate changing device for a printing press, comprising: a bearing housing, a main shaft, and a printing roller. The main shaft is disposed between two bearing housings. End plates are fixed on both sides of the outer wall of the main shaft. A U-shaped groove is formed on the outer periphery of the end plate. A printing roller is disposed between the U-shaped grooves. A pressure block is disposed inside the U-shaped groove above the printing roller. A threaded sleeve is disposed at the center of one end of the end plate. A positioning sleeve is disposed on the outer side of the threaded sleeve. One side of the inner wall of the positioning sleeve can abut against the outer wall of the pressure block. A locking nut is disposed on the outer side of the threaded sleeve at one end of the positioning sleeve.

[0007] Furthermore, there are six U-shaped grooves on the end plate, which are evenly distributed circumferentially on the end plate, and there are also six printing rollers.

[0008] Furthermore, the positioning sleeve has a Z-shaped cross-section, the inner wall of the top of the positioning sleeve abuts against the pressure block, and the inner wall of the middle part of the positioning sleeve is provided with an internal thread that mates with the threaded sleeve.

[0009] Furthermore, a positioning block is fixed at one end of the main shaft. The positioning block is hexagonal. Positioning cylinders are provided on both sides of the bearing seat. A positioning plate is provided at one end of the positioning cylinder. One side of the positioning plate can abut against the outer wall of the positioning block.

[0010] Furthermore, the pressure block and the U-shaped groove are interference fit, and the top surface of the pressure block is flush with the outer ring of the end plate.

[0011] Furthermore, a servo motor is fixed to the outer wall of the bearing housing on one side, and one end of the output shaft of the servo motor is fixed to one end of the main shaft.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This utility model, through the design of a U-shaped groove, an upper pressure block, and a positioning sleeve, enables the printing roller to rotate automatically when the automatic plate changing device of the printing press is in use. This is achieved by driving the main shaft to rotate via a servo motor, thereby automatically switching to the printing station.

[0014] During the installation of the printing roller, the two ends of the printing roller are placed in the U-shaped groove, and the printing roller is initially fixed by the interference fit between the upper pressure block and the U-shaped groove. Then, the positioning sleeve and the threaded sleeve are tightened so that the positioning sleeve is placed on the outside of the end plate. The positioning sleeve further limits the upper pressure block, ensuring the stable connection of the printing roller. When disassembling, the printing roller can be disassembled simply by unscrewing the positioning sleeve and pulling out the upper pressure block. The installation and disassembly of the printing roller are convenient.

[0015] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0016] Figure 1 This is a perspective view of an automatic plate changing device for a printing press according to the present invention;

[0017] Figure 2 This is a perspective view of an automatic plate changing device for a printing press according to the present invention.

[0018] Figure 3 This is a front sectional view of an automatic plate changing device for a printing press according to the present invention;

[0019] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle.

[0020] In the diagram: 1. Bearing housing; 2. Main shaft; 3. Positioning block; 4. Positioning cylinder; 5. Positioning plate; 6. End plate; 7. Printing roller; 8. Threaded sleeve; 9. Locking nut; 10. Positioning sleeve; 11. Servo motor; 12. U-shaped groove; 13. Pressure block. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Please see Figures 1-4 This utility model provides a technical solution: an automatic plate changing device for a printing press, comprising: bearing seats 1, a main shaft 2, and a printing roller 7. The main shaft 2 is positioned between two bearing seats 1, which support the main shaft 2, enabling it to be stably mounted on the printing press. The main shaft 2, as the core rotating component of the entire device, has end plates 6 fixed to both sides of its outer wall. The end plates 6 provide a mounting base for subsequent installation of components such as the printing roller 7 and pressure block 13, thus constructing the basic framework structure of the device and ensuring that all components can be installed in an orderly manner and work collaboratively.

[0023] End plates 6 are fixed to both sides of the outer wall of the main shaft 2. U-shaped grooves 12 are formed on the outer periphery of the end plates 6, providing an installation position for the printing roller 7. This design allows the printing roller 7 to be easily placed within the U-shaped grooves 12, facilitating installation and disassembly. Simultaneously, the structure of the U-shaped grooves 12 restricts some degrees of freedom of the printing roller 7, ensuring its stability during rotation and providing a reliable foundation for printing operations. The printing roller 7 is positioned between the U-shaped grooves 12. A pressure block 13 is located above the printing roller 7 within the U-shaped grooves 12. The pressure block 13, positioned above the printing roller 7 within the U-shaped grooves 12, is tightly fixed within the U-shaped grooves 12 through an interference fit, thereby exerting downward pressure on the printing roller 7 and achieving initial fixation. The design of the top surface of the pressure block 13 being flush with the outer ring of the end plates 6 makes the entire structure flatter, avoiding potential interference problems caused by protruding components, and also facilitating the subsequent installation and operation of the positioning sleeve 10.

[0024] A threaded sleeve 8 is provided at the center of one end of the end plate 6, and a positioning sleeve 10 is provided on the outside of the threaded sleeve 8. One side of the inner wall of the positioning sleeve 10 can abut against the outer wall of the pressure block 13. A locking nut 9 is provided at one end of the positioning sleeve 10 on the outside of the threaded sleeve 8. The threaded sleeve 8 at the center of one end of the end plate 6 provides the mounting base for the positioning sleeve 10. After the positioning sleeve 10 is fitted on the outside of the threaded sleeve 8, one side of its inner wall abuts against the outer wall of the lower pressure block 13, further limiting the lower pressure block 13, thereby enhancing the fixing effect on the printing roller 7 and ensuring that the printing roller 7 will not loosen or fall off during high-speed rotation and printing. The locking nut 9 is located at one end of the positioning sleeve 10 outside the threaded sleeve 8. By tightening the locking nut 9, the positioning sleeve 10 can be firmly fixed on the threaded sleeve 8, preventing the positioning sleeve 10 from loosening during operation and ensuring the stability of the entire fixing structure.

[0025] There are six U-shaped grooves 12 on the end plate 6, which are evenly distributed circumferentially on the end plate 6. Six printing rollers 7 are also provided. The arrangement of six evenly distributed circumferential U-shaped grooves 12 and corresponding six printing rollers 7 increases the number of printing rollers usable by the printing press. During the printing process, different printing rollers 7 can be quickly switched to the printing station by rotating the main shaft 2 according to different printing needs, improving the flexibility and applicability of the printing press, meeting diverse printing tasks, and reducing the time and cost of changing printing rollers.

[0026] The positioning sleeve 10 has a Z-shaped cross-section. The inner top wall of the positioning sleeve 10 abuts against the pressure block 13, and the inner middle wall of the positioning sleeve 10 has an internal thread that mates with the threaded sleeve 8. The Z-shaped design of the positioning sleeve 10 allows it to better mate with the lower pressure block 13 and the threaded sleeve 8. The inner top wall abuts against the lower pressure block 13, limiting its movement; the inner middle wall has an internal thread that mates with the threaded sleeve 8, allowing the positioning sleeve 10 to be easily screwed onto the threaded sleeve 8. This structure ensures the ease of installation of the positioning sleeve 10 and improves its limiting effect on the lower pressure block 13, further enhancing the connection stability of the printing roller 7.

[0027] A positioning block 3, hexagonal in shape, is fixed to one end of the main shaft 2. Positioning cylinders 4 are located on both sides of the bearing housing 1, and a positioning plate 5 is located at one end of each cylinder. One side of the positioning plate 5 abuts against the outer wall of the positioning block 3. The hexagonal positioning block 3 fixed to one end of the main shaft 2 provides a precise reference for positioning the main shaft 2. When the main shaft 2 needs to stop at a specific position for printing, the positioning cylinders 4 on both sides of the bearing housing 1 are activated, pushing the positioning plate 5 towards the positioning block 3 until one side of the positioning plate 5 abuts against the outer wall of the positioning block 3. The cooperation between the hexagonal positioning block 3 and the positioning plate 5 achieves precise positioning, ensuring that the main shaft 2 stops at the accurate position, allowing the printing roller 7 to be accurately positioned at the printing station, thus improving printing accuracy and quality.

[0028] The pressure block 13 and the U-shaped groove 12 are interference-fitted, and the top surface of the pressure block 13 is flush with the outer ring of the end plate 6. A servo motor 11 is fixed to the outer wall of the bearing seat 1 on one side, and one end of the output shaft of the servo motor 11 is fixed to one end of the main shaft 2. The servo motor 11 is fixed to the outer wall of the bearing seat 1 on one side, and its output shaft is fixedly connected to one end of the main shaft 2, providing the power source for the entire device. The servo motor 11 has precise control performance and can accurately control the rotation angle and speed of the main shaft 2 according to the preset program. When the automatic plate changing device of the printing press is used, the servo motor 11 drives the main shaft 2 to rotate, thereby causing the printing roller 7 to rotate accordingly, realizing the function of automatically switching to the printing station, improving the automation level and production efficiency of the printing press.

[0029] When the automatic plate changing device of the printing press is in use, the main shaft 2 is driven to rotate by the servo motor 11, so that the printing roller 7 rotates accordingly, thereby automatically switching to the printing station;

[0030] During the installation of the printing roller 7, the two ends of the printing roller 7 are placed in the U-shaped groove 12, and the printing roller 7 is initially fixed by the interference fit between the upper pressure block 13 and the U-shaped groove 12. Then, the positioning sleeve 10 is tightened with the threaded sleeve 8, so that the positioning sleeve 10 is fitted on the outside of the end plate 6. The positioning sleeve 10 further limits the upper pressure block 13, ensuring the stable connection of the printing roller 7. When disassembling, the printing roller 7 can be disassembled simply by unscrewing the positioning sleeve 10 and pulling out the upper pressure block 13. The printing roller 7 is easy to install and disassemble.

[0031] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

Claims

1. An automatic plate changing device for a printing press, comprising: The bearing housing (1), main shaft (2) and printing roller (7) are characterized in that: a main shaft (2) is provided between the two bearing housings (1), and end plates (6) are fixed on both sides of the outer wall of the main shaft (2). A U-shaped groove (12) is provided on the outer periphery of the end plate (6), and a printing roller (7) is provided between the U-shaped grooves (12). A pressure block (13) is provided inside the U-shaped groove (12) above the printing roller (7). A threaded sleeve (8) is provided at the center of one end of the end plate (6), and a positioning sleeve (10) is provided on the outside of the threaded sleeve (8). One side of the inner wall of the positioning sleeve (10) can abut against the outer wall of the pressure block (13). A locking nut (9) is provided on the outside of the threaded sleeve (8) at one end of the positioning sleeve (10).

2. The automatic plate changing device for a printing press according to claim 1, characterized in that: There are six U-shaped grooves (12) on the end plate (6), and the six U-shaped grooves (12) are evenly distributed circumferentially on the end plate (6). There are also six printing rollers (7).

3. The automatic plate changing device for a printing press according to claim 1, characterized in that: The positioning sleeve (10) has a Z-shaped cross section. The inner wall of the top of the positioning sleeve (10) abuts against the pressure block (13). The inner wall of the middle part of the positioning sleeve (10) is provided with an internal thread that cooperates with the threaded sleeve (8).

4. The automatic plate changing device for a printing press according to claim 2, characterized in that: One end of the main shaft (2) is fixed with a positioning block (3), which is hexagonal. The bearing seat (1) is provided with positioning cylinders (4) on both sides. One end of the positioning cylinder (4) is provided with a positioning plate (5), and one side of the positioning plate (5) can abut against the outer wall of the positioning block (3).

5. The automatic plate changing device for a printing press according to claim 1, characterized in that: The pressure block (13) and the U-shaped groove (12) are interference fit, and the top surface of the pressure block (13) is flush with the outer ring of the end plate (6).

6. An automatic plate changing device for a printing press according to any one of claims 1-5, characterized in that: A servo motor (11) is fixed to the outer wall of the bearing housing (1) located on one side, and one end of the output shaft of the servo motor (11) is fixed to one end of the main shaft (2).

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