Paper winding drum supporting device of paper printing machine

Abstract

The utility model relates to the technical field of paper printing machines, and discloses a paper printing machine paper reel supporting device which comprises a base, the left side and the right side of the base are fixedly connected with fixing seats, the left side and the right side of each fixing seat are provided with first limiting grooves, the front side and the rear side of each fixing seat are provided with first sliding grooves, and the front end of the top of the base is fixedly connected with a motor. A threaded rod is fixedly connected to the top of the motor, a rotating rod is connected to the threaded rod through a gear, connecting rods are fixedly connected to the left end and the right end of the outer side of the rotating rod, sliding rods are fixedly connected to the rear ends of the connecting rods, and second sliding grooves are formed in the left sides of the sliding rods. According to the lifting device, the paper winding drum which is large in size, heavy in weight and high in installation position can be installed at a low position and then lifted, and installation is convenient, fast and efficient; and meanwhile, portable auxiliary positioning is achieved through the first fixing plate, the second positioning plate and the roller, the problem that the paper reel is prone to rolling and difficult to position is solved, positioning is more accurate and portable, and the installation efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of paper printing machine technology, and in particular to a paper roll support device for a paper printing machine. Background Technology

[0002] A printing press is a machine for printing text and images. A modern printing press generally consists of mechanisms for plate mounting, inking, printing, and paper feeding (including folding). Its working principle is as follows: first, the text and images to be printed are made into a printing plate, which is then mounted on the printing press. Ink is then applied manually or by the printing press to the areas of the printing plate containing the text and images, and then directly or indirectly transferred to paper or other printing substrates (such as textiles, metal plates, plastics, leather, wood panels, glass, and ceramics), thus reproducing a printed product identical to the printing plate. The invention and development of the printing press has played a vital role in the dissemination of human civilization and culture, and it is typically used for mass production.

[0003] The paper roll support frame for printing presses is a device used to place and support paper rolls. However, in actual printing work, it has been found that existing paper roll support devices still have the following technical problems:

[0004] When installing large, heavy, and elevated paper rolls, existing equipment presents significant installation inconvenience and inefficiency. Firstly, workers must manually lift the heavy rolls to the higher installation position, which is extremely physically demanding, consuming considerable time and energy, easily leading to worker fatigue, and compromising operational safety. Because the paper rolls are cylindrical, the lack of effective anti-rolling measures during installation makes them prone to rolling back and forth. Once rolled, workers must readjust the roll position, repeating the process multiple times, severely impacting the installation progress and significantly increasing the difficulty. Furthermore, frequent adjustments make it difficult to maintain precise roll positioning, leading to installation deviations and greatly affecting installation quality.

[0005] Therefore, in view of the problems of low efficiency when installing large paper rolls and difficulty in quickly positioning and installing them when the rolls roll back and forth, there is a need for a paper roll support device for paper printing presses that can solve the above problems. Utility Model Content

[0006] To address the issues of low efficiency and difficulty in quickly positioning large paper rolls during installation, as well as the challenges of rapid positioning due to the roll's forward and backward rolling motion, this application provides a paper roll support device for a paper printing press. This device enables the installation of large, heavy paper rolls at high positions, allowing for easy and efficient installation by lowering the roll and then raising it. Furthermore, it utilizes a fixed plate, a positioning plate, and rollers for portable auxiliary positioning, solving the problem of easy rolling and difficult positioning of paper rolls. This results in more precise and portable positioning, improving installation efficiency.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A paper roll support device for a paper printing machine includes a base, characterized in that: fixed seats are fixedly connected to both the left and right sides of the base; each fixed seat has a limiting groove on its left and right sides; each fixed seat has a sliding groove on its front and rear sides; a motor is fixedly connected to the top front end of the base; a threaded rod is fixedly connected to the top of the motor; the threaded rod is connected to a rotating rod via gears; connecting rods are fixedly connected to both the left and right ends of the rotating rod; sliding rods are fixedly connected to the rear ends of each connecting rod; a second sliding groove is provided on the left side of each sliding rod; the second sliding groove is connected to the limiting groove through a sliding sleeve assembly; and an installation sleeve rod is fixedly connected inside the sliding sleeve assembly on the right side; the inner wall of the installation sleeve rod... A round rod is slidably connected, and an installation block is fixedly connected to the left end of the outer wall of the round rod. Installation grooves are provided on both the front and rear sides of the left end of the inner wall of the mounting sleeve. A support rod is installed inside the left-side sliding sleeve assembly. A bushing is rotatably connected to the middle of the outer side of the support rod. A paper roll is connected to the support rod through the bushing. A round groove is provided on the right side of the support rod. Installation grooves are provided on both the front and rear sides of the inner wall of the round groove. A slot is provided on the left side of the inner wall of the round groove. The inner wall of the round groove is detachably connected to the round rod. The dimensions of the second installation groove and the slot are adapted to the installation block. A fixing block is fixedly connected to the left side of the support rod. The fixing block is connected to the left-side sliding sleeve assembly through a positioning component.

[0009] As a further improvement of this utility model, a fixing plate is fixedly connected to the middle of the top of the base, a storage groove is opened at the rear end of the top of the base, a positioning plate is rotatably connected to the front end of the inner wall of the storage groove, a connecting block is rotatably connected to the middle of the bottom of the positioning plate, a roller is rotatably connected to the bottom end of the connecting block, a limiting groove is opened on the bottom side of the inner wall of the storage groove, an inner cavity is connected to the storage groove through the limiting groove, an electric push rod is fixedly connected to the rear end of the inner wall of the inner cavity, and a trapezoidal block is fixedly connected to the front end of the electric push rod.

[0010] As a further improvement of this utility model, the sliding sleeve assembly includes a slider, which is installed inside the left and right limiting grooves. A rotating cylinder is rotatably connected to the side of the slider that is close to it. A fixing plate is fixedly connected to the outside of the slider, and a limiting ring is fixedly connected to the inside of the fixing plate.

[0011] As a further improvement of this utility model, the inner wall of the second fixing plate is fitted with the outer wall of the fixing seat, and a positioning ring is fixedly connected to the outer wall of the second fixing plate on the left end.

[0012] As a further improvement of this utility model, the positioning component includes a positioning ring and a positioning pin. The positioning ring is fixedly connected to the outside of the left sliding sleeve component, and a positioning hole is opened on the outside of the positioning ring. The positioning pin is fixedly connected to the right side of the fixing block and is installed inside the positioning hole.

[0013] As a further improvement of this utility model, a fixing groove is provided on the left side of the inner wall of the circular groove, and a spring is fixedly connected inside the fixing groove.

[0014] As a further improvement of this utility model, the rotating cylinder is sleeved inside the second slide groove, and the outer wall of the slide rod is installed on the inner wall of the first slide groove.

[0015] As a further improvement of this utility model, the outer wall of the roller is in contact with the left side of the outer wall of the trapezoidal block, and the trapezoidal block is slidably connected to the inner wall of the inner cavity.

[0016] In summary, compared with the prior art, this application includes at least one of the following beneficial technical effects:

[0017] 1. This utility model achieves more convenient and efficient installation, including but not limited to large-volume, heavy paper rolls that are installed at a relatively high position. Through the transmission structure such as the threaded rod, gear, rotating rod, connecting rod and sliding rod driven by the motor, the position of the installation sleeve rod and support rod can be flexibly adjusted, so that the workers do not have to operate with difficulty at a high position. They can first put the roll on the support rod at a low position, and then lift it to the installation position with the help of the motor drive, which greatly improves the installation efficiency.

[0018] 2. This utility model achieves portable auxiliary positioning, improving installation efficiency and effectively solving the problem of paper rolls being prone to rolling back and forth and difficult to position due to their cylindrical shape. During installation, one end of the paper roll is limited by a fixing plate, and the positioning plate is rotated to make the roller contact the outer wall of the roll and limit it from the other side, achieving convenient and accurate positioning. Attached Figure Description

[0019] Figure 1 This is an isometric view of a paper roll support device for a paper printing machine proposed in this utility model;

[0020] Figure 2 This is a schematic diagram of the left side structure of a paper roll support device for a paper printing machine proposed in this utility model;

[0021] Figure 3 This is a schematic diagram of a sliding sleeve assembly for a paper roll support device of a paper printing machine according to the present invention;

[0022] Figure 4 This is a schematic diagram of the positioning component structure of a paper roll support device for a paper printing machine proposed in this utility model;

[0023] Figure 5 This is a schematic diagram of the support rod structure of a paper roll support device for a paper printing machine proposed in this utility model;

[0024] Figure 6 This is a schematic diagram of the chamber structure of a paper roll support device for a paper printing machine proposed in this utility model.

[0025] Legend:

[0026] 1. Base; 2. Motor; 3. Threaded rod; 4. Gear; 5. Rotating rod; 6. Connecting rod; 7. Sliding rod; 8. Sliding sleeve assembly; 9. Fixed seat; 10. Limiting groove one; 11. Sliding groove one; 12. Limiting ring; 13. Mounting sleeve rod; 14. Round rod; 15. Mounting groove one; 16. Mounting block; 17. Sliding groove two; 18. Support rod; 19. Bushing; 20. Paper roll; 21. Round groove; 22. Mounting groove two; 23. Fixed seat; 24. Fixed groove; 25. Spring; 26. Fixing block; 27. Positioning assembly; 28. Storage groove; 29. ​​Positioning plate two; 30. Fixing plate one; 31. Connecting block; 32. Inner chamber; 33. Roller; 34. Electric push rod; 35. Trapezoidal block; 36. Limiting groove two; 801. Slider; 802. Fixing plate two; 803. Rotary drum; 2601. Positioning ring; 2602. Positioning hole; 2603. Positioning pin. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0028] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These terms are used solely for the convenience of describing this application and for 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. Therefore, they should not be construed as limitations on this application. Furthermore, the use of terms such as "first" and "second" in the description of this application is only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it may be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0032] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] Example 1: As Figures 3-5As shown, a paper roll support device for a paper printing machine includes a base 1. The base 1 is characterized by: fixed seats 9 fixedly connected to both the left and right sides; each fixed seat 9 has a limiting groove 10 on its left and right sides; sliding grooves 11 on the front and rear sides of the fixed seat 9; a motor 2 fixedly connected to the top front end of the base 1; a threaded rod 3 fixedly connected to the top of the motor 2; a rotating rod 5 connected to the threaded rod 3 via a gear 4; connecting rods 6 fixedly connected to the left and right ends of the rotating rod 5; sliding rods 7 fixedly connected to the rear ends of the connecting rods 6; sliding grooves 17 on the left side of each sliding rod 7; sliding grooves 17 connected to the limiting grooves 10 via a sliding sleeve assembly 8; and an installation sleeve rod 13 fixedly connected inside the right sliding sleeve assembly 8; a round rod 1 slidingly connected to the inner wall of the installation sleeve rod 13. 4. An installation block 16 is fixedly connected to the left end of the outer wall of the round rod 14. An installation groove 15 is provided on the front and rear sides of the left end of the inner wall of the mounting sleeve rod 13. A support rod 18 is installed inside the left sliding sleeve assembly 8. A bushing 19 is rotatably connected to the middle of the outer side of the support rod 18. A paper roll 20 is connected to the support rod 18 through the bushing 19. A round groove 21 is provided on the right side of the support rod 18. An installation groove 22 is provided on the front and rear sides of the inner wall of the round groove 21. A slot 36 is provided on the left side of the inner wall of the round groove 21. The inner wall of the round groove 21 is detachably connected to the round rod 14. The dimensions of the installation groove 22 and the slot 36 are adapted to the installation block 16. A fixing block 25 is fixedly connected to the left side of the support rod 18. The fixing block 25 is connected to the left sliding sleeve assembly 8 through the positioning assembly 26.

[0034] Specifically, in actual printing scenarios, it is often necessary to handle the installation of large-volume and heavy paper rolls, and the installation position is relatively high, making the installation extremely inconvenient for workers and greatly reducing efficiency. To address this, a support system based on base 1 was constructed. Fixed seats 9 are fixedly connected to the left and right sides of base 1. Limiting grooves 10 on the left and right sides and sliding grooves 11 on the front and rear sides, together with sliding sleeve assembly 8, provide stable guidance and limiting for the operation of the device, ensuring the precise movement of each component. The motor 2 fixed at the top front end of base 1 serves as the power core. The threaded rod 3 connected to the top of motor 2 forms an efficient transmission link with gear 4 and rotating rod 5. When motor 2 starts, threaded rod 3 rotates, driving rotating rod 5. The connecting rods 6 at both ends of the outer side of rotating rod 5 move accordingly, thereby driving sliding rod 7 to move within sliding groove 11. This design allows the mounting sleeve rod 13 fixed inside the right sliding sleeve assembly 8 and the sliding support rod 18 inside the left sliding sleeve assembly 8 to be easily displaced, realizing flexible adjustment of the installation position of paper roll 20, greatly improving installation efficiency and convenience.

[0035] The mounting sleeve 13 and the round rod 14 are detachably connected. The mounting block 16 on the round rod 14 is compatible with the mounting groove 15 on the inner wall of the mounting sleeve 13 and the mounting groove 22 and slot 36 in the round groove 21 on the right side of the support rod 18. During installation, when the paper roll moves to the designated installation position, the round rod 14 slides to the left into the round groove 21, and the mounting block 16 can accurately engage in the corresponding groove, ensuring a stable connection. After reaching the top, the round rod 14 is rotated, and the mounting block 16 engages in the slot 36. In conjunction with the spring 24, the spring 24 is compressed to the left by a leftward force during this process. After the mounting block 16 engages in the slot 36, it generates a rightward force, ensuring the stability of the paper roll 20 after installation. The fixing block 25 on the left side of the support rod 18 is connected to the left sliding sleeve assembly 8 through the positioning component 26, further enhancing the reliability of the entire support structure. The overall structural design is ingenious, effectively solving the problem of installing large-volume paper rolls in existing equipment. It realizes multiple functions such as quick installation, motor-driven lifting, and stable support, greatly optimizing the installation process of paper rolls in paper printing machines.

[0036] Example 2: As Figure 1 , Figure 5 and Figure 6 As shown, a fixing plate 29 is fixedly connected to the top center of the base 1. A storage groove 27 is provided at the top rear end of the base 1. A positioning plate 28 is rotatably connected to the front end of the inner wall of the storage groove 27. A connecting block 30 is rotatably connected to the bottom center of the positioning plate 28. A roller 32 is rotatably connected to the bottom end of the connecting block 30. A limiting groove 35 is provided on the bottom side of the inner wall of the storage groove 27. The storage groove 27 is connected to an inner cavity 31 through the limiting groove 35. An electric push rod 33 is fixedly connected to the rear end of the inner wall of the inner cavity 31. A trapezoidal block 34 is fixedly connected to the front end of the electric push rod 33. The sliding sleeve assembly 8 includes a slider 801. The slider 801 is installed inside the left and right limiting grooves 10. A rotating cylinder 803 is rotatably connected to the side of the slider 801. A fixing plate 802 is fixedly connected to the outside of the slider 801. A limiting groove 34 is fixedly connected to the inside of the fixing plate 802. Positioning ring 12, the inner wall of fixing plate 2 802 is attached to the outer wall of fixing seat 9, positioning ring 2601 is fixedly connected to the outer wall of fixing plate 2 802 at the left end, positioning component 26 includes positioning ring 2601 and positioning pin 2603, positioning ring 2601 is fixedly connected to the outer side of left sliding sleeve component 8, positioning hole 2602 is opened on the outer side of positioning ring 2601, positioning pin 2603 is fixedly connected to the right side of fixing block 25, positioning pin 2603 is installed inside positioning hole 2602, fixing groove 23 is opened on the left side of inner wall of circular groove 21, spring 24 is fixedly connected inside fixing groove 23, rotating cylinder 803 is sleeved inside sliding groove 2 17, outer wall of sliding rod 7 is installed on inner wall of sliding groove 1 11, outer wall of roller 32 is attached to the left side of outer wall of trapezoidal block 34, trapezoidal block 34 is slidably connected to inner wall of inner cavity 31.

[0037] Specifically, the fixing plate 29, fixedly connected to the top center of the base 1, and the positioning plate 28, rotatably connected within the storage slot 27 at the rear end of the top of the base 1, effectively avoid the positioning difficulties caused by the cylindrical shape of the paper roll during installation. The fixing plate 29 provides a stable reference plane, which can limit the paper roll 20 from one side during installation, preventing the paper roll from shifting to that side. The roller 32, rotatably connected to the bottom center of the positioning plate 28 via the connecting block 30, can contact the paper roll during installation, thus limiting the forward and backward rolling of the paper roll to a certain extent. When the paper roll 20 needs to be installed, one end of the paper roll is brought close to the fixing plate 29, and the positioning plate 28 is rotated to a suitable angle, allowing the roller 32 to contact the outer wall of the paper roll, limiting the paper roll from the other side, thereby achieving convenient positioning and installation, and making up for the lack of a portable auxiliary positioning structure in existing equipment.

[0038] From the perspective of the overall structural benefits, the limiting groove 35 on the bottom side of the inner wall of the receiving groove 27 is connected to the inner cavity 31. The trapezoidal block 34 connected to the front end of the electric push rod 33 in the inner cavity 31 can slide within the limiting groove 35 through the extension and retraction of the electric push rod 33. Since the outer wall of the roller 32 is in contact with the left side of the outer wall of the trapezoidal block 34, the movement of the trapezoidal block 34 can drive the roller 32 to move up and down. Thus, the height of the positioning plate 28 and the roller 32 can be flexibly adjusted according to the different sizes of the paper roll 20 and the installation requirements, further improving the adaptability of the positioning installation. The cooperation between the positioning ring 2601 and the positioning pin 2603 in the positioning assembly 26, as well as the synergistic effect of the spring 24 and the mounting block 16 in the fixing groove 23 on the left side of the inner wall of the circular groove 21, further stabilizes the support structure after the paper roll is installed, ensuring that the paper roll rotates stably during the printing process, providing efficient and stable support for the paper printing work, and improving the practicality and functionality of the entire paper roll support device of the paper printing machine.

[0039] Working principle: During operation, the motor 2 located at the top front of the base 1 starts, driving the threaded rod 3 at the top to rotate. The threaded rod 3 is connected to the rotating rod 5 through the gear 4, transmitting power to the rotating rod 5 to make it rotate. The connecting rods 6, which are fixedly connected to the left and right ends of the rotating rod 5, move with the rotation of the rotating rod 5. The sliding rod 7, which is fixedly connected to the rear end of the connecting rod 6, moves within the first sliding groove 11 on the front and rear sides of the fixed seat 9. The second sliding groove 17 on the left side of the sliding rod 7 cooperates with the first limiting groove 10 on the left and right sides of the fixed seat 9 through the sliding sleeve assembly 8, thereby driving the installation sleeve rod 13 fixedly connected inside the right sliding sleeve assembly 8 and the support rod 18 slidably connected inside the left sliding sleeve assembly 8 to move, thereby adjusting the installation position of the paper roll 20. During installation, when the paper roll 20 moves to the designated installation position, the round rod 14, driven by the mounting sleeve rod 13, slides to the left into the round groove 21 on the right side of the support rod 18. The mounting block 16 fixed to the left end of the outer wall of the round rod 14 precisely engages with the mounting slots 22 on the front and rear sides of the inner wall of the round groove 21 and the slot 36 on the left side. At the same time, the spring 24 in the fixing slot 23 on the left side of the inner wall of the round groove 21 is compressed by a leftward force when the mounting block 16 moves to the left. When the mounting block 16 engages with the slot 36, the spring 24 generates a rightward force, ensuring the stability of the paper roll 20 after installation. In addition, the fixing block 25 fixed to the left side of the support rod 18 is connected to the positioning hole 2602 on the positioning ring 2601 fixed to the outside of the left sliding sleeve assembly 8 through the positioning pin 2603 in the positioning assembly 26, further enhancing the reliability of the entire support structure.

[0040] When installing the paper roll 20, place one end of the paper roll near the fixing plate 29 fixedly connected to the top center of the base 1. Simultaneously, rotate the positioning plate 28 rotatably connected to the front end of the inner wall of the storage groove 27 to a suitable angle. The roller 32, rotatably connected to the bottom center of the positioning plate 28 via the connecting block 30, contacts the outer wall of the paper roll, limiting the paper roll from the other side and preventing it from rolling back and forth due to its cylindrical shape, thus achieving convenient positioning and installation. The limiting groove 35 opened on the bottom side of the inner wall of the storage groove 27 is connected to the inner cavity 31. The trapezoidal block 34 connected to the front end of the electric push rod 33 fixedly connected to the rear end of the inner wall of the inner cavity 31 can slide within the limiting groove 35 by extending and retracting the electric push rod 33. Since the outer wall of the roller 32 is in contact with the left side of the outer wall of the trapezoidal block 34, the movement of the trapezoidal block 34 can drive the roller 32 to move up and down. Therefore, the height of the positioning plate 28 and the roller 32 can be flexibly adjusted according to the different sizes of the paper roll 20 and installation requirements, further improving the adaptability of positioning and installation. After installation, the cooperation between the positioning ring 2601 and the positioning pin 2603 in the positioning assembly 26, as well as the synergistic effect of the spring 24 and the mounting block 16 in the fixing groove 23 on the left side of the inner wall of the circular groove 21, ensures that the paper roll rotates stably during the printing process, providing efficient and stable support for the paper printing work and improving the practicality and functionality of the entire paper roll support device of the paper printing machine.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A paper roll support device for a paper printing machine, comprising a base (1), characterized in that: The base (1) is fixedly connected to the left and right sides of the base (1). The fixed seats (9) are provided with limit grooves (10) on the left and right sides. The fixed seats (9) are provided with sliding grooves (11) on the front and rear sides. The base (1) is fixedly connected to the top front end of the base (2). The top of the motor (2) is fixedly connected to the threaded rod (3). The threaded rod (3) is connected to the rotating rod (5) through the gear (4). The rotating rod (5) is fixedly connected to the left and right ends of the outer side of the rotating rod (5). The rear end of the connecting rod (6) is fixedly connected to the sliding rod (7). The left side of the sliding rod (7) is provided with a second sliding groove (17). The second sliding groove (17) is connected to the limit groove (10) through the sliding sleeve assembly (8). The right side of the sliding sleeve assembly (8) is fixedly connected to the mounting sleeve rod (13). The inner wall of the mounting sleeve rod (13) is slidably connected to the round rod (14). The left end of the outer wall of the round rod (14) is fixedly connected to the mounting sleeve rod (13). There is an installation block (16). The front and rear sides of the left end of the inner wall of the installation sleeve rod (13) are provided with installation grooves (15). The sliding sleeve assembly (8) on the left side is equipped with a support rod (18). The middle of the outer side of the support rod (18) is rotatably connected to a bushing (19). The support rod (18) is connected to a paper roll (20) through the bushing (19). A circular groove (21) is provided on the right side of the support rod (18). The front and rear sides of the inner wall of the circular groove (21) are provided with installation grooves (15). Each of the two is provided with a second mounting groove (22). A slot (36) is provided on the left side of the inner wall of the circular groove (21). The inner wall of the circular groove (21) is detachably connected to the circular rod (14). The dimensions of the second mounting groove (22) and the slot (36) are adapted to the mounting block (16). A fixing block (25) is fixedly connected to the left side of the support rod (18). The fixing block (25) is connected to the sliding sleeve assembly (8) on the left side through the positioning component (26).

2. The paper roll support device for a paper printing machine according to claim 1, characterized in that: A fixing plate (29) is fixedly connected to the top middle of the base (1). A storage groove (27) is opened at the top rear end of the base (1). A positioning plate (28) is rotatably connected to the front end of the inner wall of the storage groove (27). A connecting block (30) is rotatably connected to the bottom middle of the positioning plate (28). A roller (32) is rotatably connected to the bottom end of the connecting block (30). A limiting groove (35) is opened on the bottom side of the inner wall of the storage groove (27). The storage groove (27) is connected to an inner cavity (31) through the limiting groove (35). An electric push rod (33) is fixedly connected to the rear end of the inner wall of the inner cavity (31). A trapezoidal block (34) is fixedly connected to the front end of the electric push rod (33).

3. The paper roll support device for a paper printing machine according to claim 1, characterized in that: The sliding sleeve assembly (8) includes a slider (801), which is installed inside the first limiting groove (10) on the left and right sides. A rotating cylinder (803) is rotatably connected to the side of the slider (801) close to it. A second fixing plate (802) is fixedly connected to the outside of the slider (801), and a limiting ring (12) is fixedly connected to the inside of the second fixing plate (802).

4. The paper roll support device for a paper printing machine according to claim 3, characterized in that: The inner wall of the second fixing plate (802) is in contact with the outer wall of the fixing seat (9), and a positioning ring (2601) is fixedly connected to the outer wall of the second fixing plate (802) on the left end.

5. The paper roll support device for a paper printing machine according to claim 1, characterized in that: The positioning component (26) includes a positioning ring (2601) and a positioning pin (2603). The positioning ring (2601) is fixedly connected to the outside of the sliding sleeve component (8) on the left side. A positioning hole (2602) is provided on the outside of the positioning ring (2601). The positioning pin (2603) is fixedly connected to the right side of the fixing block (25). The positioning pin (2603) is installed inside the positioning hole (2602).

6. The paper roll support device for a paper printing machine according to claim 1, characterized in that: A fixing groove (23) is provided on the left side of the inner wall of the circular groove (21), and a spring (24) is fixedly connected inside the fixing groove (23).

7. A paper roll support device for a paper printing machine according to claim 3, characterized in that: The rotating cylinder (803) is fitted inside the second slide groove (17), and the outer wall of the slide rod (7) is installed on the inner wall of the first slide groove (11).

8. A paper roll support device for a paper printing machine according to claim 2, characterized in that: The outer wall of the roller (32) is in contact with the left side of the outer wall of the trapezoidal block (34), and the trapezoidal block (34) is slidably connected to the inner wall of the inner cavity (31).

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