Rotary offset press

Abstract

The utility model discloses a rotary offset press, and relates to the technical field of printing. A rotary offset press comprises a frame body, a supporting frame is fixed to the frame body, a glue printing roller is installed in the supporting frame, a plurality of rotating rollers are installed in one end of the frame body, paper roll equipment is installed at one end of the frame body, a fixing frame is fixed to the side, away from the supporting frame, of the frame body, a motor is fixed to the fixing frame, and the output end of the motor extends into the fixing frame. A fan is fixed to the supporting frame, and an adjusting mechanism is arranged between the motor and the frame body. And through the adjusting mechanism, the tightness degree of the paper is conveniently adjusted, fluctuation during paper printing is reduced, the situations of inaccurate overprinting, double images and the like of the paper are reduced, and the influence on the printing quality and the printing efficiency is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the printing technical field, and in particular to a rotary offset press. BACKGROUND

[0002] The rotary offset press is a high-speed, high-efficiency, high-precision printing equipment widely used in the printing industry. The rotary offset press is suitable for various occasions requiring mass and rapid printing, such as newspapers, magazines, books, packaging materials, etc. Its high work efficiency and stable printing quality make it an important equipment in the commercial printing field.

[0003] Its working principle is mainly based on offset printing technology, which transfers ink to the printing material through the cooperation of the plate cylinder and the rubber cylinder, realizing high-speed and mass printing production.

[0004] In the use of the rotary offset press, the rotating printing roller cooperates with the cylinder to facilitate the rapid printing of paper and improve the printing efficiency. However, the position of the rotating roller in the existing rotary offset press is relatively fixed, which is not convenient for adjusting the tension of the printed paper. In high-speed printing, the paper may be easily fluctuated, affecting the tension of the paper, and easily causing inaccurate registration, ghosting, etc. of the paper, which may affect the printing quality and efficiency. CONTENT OF THE INVENTION

[0005] The present application aims to solve the problem of the existing rotary offset press, i.e. the position of the rotating roller is relatively fixed, which is not convenient for adjusting the tension of the printed paper, and in high-speed printing, the paper may be easily fluctuated, affecting the tension of the paper, and easily causing inaccurate registration, ghosting, etc. of the paper, which may affect the printing quality and efficiency. The present application provides a rotary offset press.

[0006] In order to achieve the above-mentioned purpose, the present application specifically adopts the following technical solution:

[0007] The rotary offset press comprises a frame, a support frame fixed on the frame, a printing roller installed in the support frame, a plurality of rotating rollers installed at one end of the frame, a paper roll device installed at one end of the frame, a fixed frame fixed on the side of the frame away from the support frame, a motor fixed on the fixed frame, the output end of the motor extending into the fixed frame, a fan fixed on the support frame, and an adjusting mechanism provided between the motor and the frame.

[0008] By adopting the above-mentioned technical solution, the tension of the paper can be adjusted by the adjusting mechanism, the fluctuation of the paper during printing can be reduced, the inaccurate registration, ghosting, etc. of the paper can be reduced, and the influence on the printing quality and efficiency can be reduced.

[0009] Further, the adjusting mechanism comprises an adjusting screw fixed to the output end of the motor, an adjusting block threadedly connected to the adjusting screw, an adjusting roller rotatably connected to one side of the adjusting block, and a limiting assembly arranged between the adjusting roller and the frame.

[0010] By adopting the above technical scheme, the motor drives the adjusting screw to rotate, the adjusting screw drives the adjusting block to move, and the adjusting block drives the adjusting roller to move, thereby adjusting the tension of the paper on the adjusting roller.

[0011] Further, the limiting assembly comprises an adjusting column fixed to the frame, a limiting block rotatably connected to one end of the adjusting roller away from the adjusting block, and the adjusting column slidingly penetrating the limiting block.

[0012] By adopting the above technical scheme, the limiting block slides on the adjusting column to limit the adjusting column, thereby facilitating the adjustment of the tension of the paper.

[0013] Further, the adjusting member comprises a photoelectric sensor fixed to the adjusting block, a controller fixed to one side of the fixed frame, and the controller being electrically connected to the photoelectric sensor and the motor.

[0014] By adopting the above technical scheme, the photoelectric sensor detects the fluctuation, position and movement speed of the passing paper, and feeds back to the controller when an abnormality is detected.

[0015] Further, the frame is provided with a moving plate, two symmetrical sliding columns are slidingly arranged on the moving plate, fixed plates are fixedly connected to the sliding columns penetrating the moving plate, a smoothing roller is rotatably connected between the two fixed plates, and the smoothing roller corresponds to the rotating roller.

[0016] By adopting the above technical scheme, the force of the sliding column causes the fixed plate to be stressed, and the smoothing roller is stressed against the paper on the rotating roller, thereby reducing the wrinkles of the paper.

[0017] Further, the sliding column is fixedly connected with a fixed block at the upper end, a spring is sleeved on the sliding column, and the end portions of the spring are fixedly connected with the fixed block and the moving plate.

[0018] By adopting the above technical scheme, the spring force causes the sliding column to be stressed.

[0019] Further, the frame body is fixed with a limiting plate on both sides, a moving screw is rotatably connected to the limiting plate, the moving screw is in threaded connection with a moving plate, the moving screw penetrates through the moving plate, a handle is fixed to the upper end of the moving screw, a guide column is slidably arranged at the end of the moving plate away from the moving screw, and the guide column is fixedly connected with the limiting plate.

[0020] By adopting the above technical scheme, the handle is twisted to rotate the moving screw, the moving screw drives the moving plate to move, the moving plate is limited to slide on the guide column, the moving plate drives the smoothing roller to move, and the resistance to the paper is conveniently adjusted.

[0021] Further, the fan is fixed with a blowing pipe at one end, the fan is fixed with a ventilation pipe at the end, the blowing pipe extends into the support frame and is fixedly connected with a fixed pipe, the fixed pipe is fixed with a shunt pipe on one side and is arrayed, the shunt pipe corresponds to the printing rubber roller, two symmetrical fixed sleeves are fixed on the support frame, the fixed sleeves penetrate through the support frame, the two fixed sleeves are fixed at one end through a connecting pipe, a water inlet is formed at the end of the fixed sleeve away from the connecting pipe, and the printing rubber roller is rotatably arranged on the fixed sleeve.

[0022] By adopting the above technical scheme, the fan generates wind power, the wind power enters the fixed pipe through the blowing pipe, and then enters the printing rubber roller through the multiple shunt pipes on the fixed pipe to blow and heat dissipation, so that the situation that the temperature is too high to affect the printing quality is reduced, at the same time, the water pump is externally connected to the water inlet of the fixed sleeve to pump water, so that the water enters the fixed sleeve, the heat generated by the printing rubber roller enters the fixed sleeve, and the heat is taken away by the entering water, so that the heat dissipation effect is improved.

[0023] In summary, the present application has at least one of the following beneficial effects:

[0024] 1. When the rotary offset printing machine is used, the light sensor detects the fluctuation, position and movement speed of the passing paper, feeds back to the controller when an abnormality is detected, the controller starts the motor, the motor drives the adjusting screw to rotate, the adjusting screw drives the adjusting block to move, the adjusting block moves to make the adjusting roller move, the tension of the paper on the adjusting roller is adjusted, the limiting block slides on the adjusting column to limit the adjusting column, the tension of the paper is adjusted, the position deviation of the paper is reduced, the tightness of the paper is adjusted through the adjusting mechanism, the fluctuation of the paper during printing is reduced, the situations of inaccurate overprint, ghosting and the like are reduced, and the influence on the printing quality and the printing efficiency is reduced.

[0025] 2. In the use of the rotary offset printing machine, the smoothing roller is in contact with the paper passing through the rotating roller to smooth the paper, and the spring force makes the sliding column bear the force, the sliding column makes the fixed plate bear the force, and the smoothing roller bears the force to resist the paper on the rotating roller, reduces the wrinkles of the paper, adapts to the thickness of different printing paper, facilitates the printing of the paper, when the resistance force needs to be adjusted, the handle is twisted to make the moving screw rotate, the moving screw drives the moving plate to move, the moving plate is limited on the guide column, the moving plate drives the smoothing roller to move, and the spring force is convenient for adjusting the resistance force of the paper, reducing the wrinkles, and facilitating the printing of the paper. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is the first structure schematic diagram of the offset printing machine in the application.

[0027] Figure 2 is the second structure schematic diagram of the offset printing machine in the application.

[0028] Figure 3 is the internal structure schematic diagram of the offset printing machine in the application.

[0029] Figure 4 is the third structure schematic diagram of the offset printing machine in the application.

[0030] BRIEF DESCRIPTION OF DRAWINGS:

[0031] 1, frame; 2, support frame; 3, printing rubber roller; 4, rotating roller; 5, fixed frame; 6, fan; 7, motor; 8, adjusting screw; 9, adjusting block; 10, adjusting column; 11, limiting block; 12, adjusting roller; 13, controller; 14, photoelectric sensor; 15, smoothing roller; 16, fixed plate; 17, sliding column; 18, spring; 19, fixed block; 20, limiting plate; 21, moving screw; 22, moving plate; 23, guide column; 24, fixed tube; 25, shunt pipe; 26, connecting pipe; 27, fixed sleeve; 28, blowing pipe. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings Figures 1-4 The application is further described in detail.

[0033] The embodiment of the application discloses a rotary offset printing machine.

[0034] Refer to Figure 1 and Figure 2The utility model provides a rotary offset press, including frame body 1, the support frame 2 is fixed on frame body 1, and the printing rubber roller 3 is installed in support frame 2, and a plurality of rotating rollers 4 are installed in one end of frame body 1, and the paper roll equipment is installed in one end of frame body 1, and the fixed frame 5 is fixed on the side of frame body 1 away from support frame 2, and the motor 7 is fixed on fixed frame 5, and the output end of motor 7 extends into fixed frame 5, and the fan 6 is fixed on support frame 2, and the adjusting mechanism is arranged between motor 7 and frame body 1.

[0035] When the rotary offset press is used, the staff places the paper to be printed on the paper roll equipment, drives the paper roll to move through the rotating rollers 4, and simultaneously starts the printing rubber roller 3 to continuously print the paper, and when printing, the tightness of the paper is adjusted through the adjusting mechanism, the fluctuation of the paper during printing is reduced, the situations such as inaccurate overprinting and ghosting of the paper are reduced, and the influence on the printing quality and printing efficiency is reduced.

[0036] Referring to Figure 2 and Figure 3 , the adjusting mechanism includes the adjusting screw 8 fixed on the output end of the motor 7, the adjusting block 9 threadedly connected on the adjusting screw 8, the adjusting roller 12 rotationally connected on one side of the adjusting block 9, the adjusting block 9 slidingly arranged with the frame body 1, and the limiting assembly arranged between the adjusting roller 12 and the frame body 1. The limiting assembly includes the adjusting column 10 fixed on the frame body 1, the limiting block 11 rotationally connected on the end of the adjusting roller 12 away from the adjusting block 9, the adjusting column 10 slidingly penetrating the limiting block 11, the limiting block 11 slidingly arranged with the frame body 1, the upper end of the adjusting column 10 fixedly connected with the fixed frame 5, and the adjusting member arranged between the adjusting block 9 and the fixed frame 5. The adjusting member includes the photoelectric sensor 14 fixed on the adjusting block 9, the controller 13 fixed on one side of the fixed frame 5, the controller 13 electrically connected with the photoelectric sensor 14, and the controller 13 electrically connected with the motor 7.

[0037] When the rotary offset press is used, the fluctuation, position and movement speed of the passing paper are detected by the photoelectric sensor 14, and when an abnormality is detected, the controller 13 is fed back, the motor 7 is started by the controller 13, the adjusting screw 8 is rotated by the motor 7, the adjusting block 9 is moved by the rotation of the adjusting screw 8, the adjusting roller 12 is moved by the movement of the adjusting block 9, the tension of the paper on the adjusting roller 12 is adjusted, the limiting block 11 is slid on the adjusting column 10, the adjusting column 10 is limited, the tension of the paper is adjusted, the position deviation of the paper is reduced, the tightness of the paper is adjusted through the adjusting mechanism, the fluctuation of the paper during printing is reduced, the situations such as inaccurate overprinting and ghosting of the paper are reduced, and the influence on the printing quality and printing efficiency is reduced.

[0038] Referring to Figure 3 and Figure 4The moving plate 22 is arranged on the frame body 1, two symmetrical sliding columns 17 are slidably arranged on the moving plate 22, the sliding columns 17 are fixedly connected with the fixed plates 16 penetrating through the moving plate 22, the two fixed plates 16 are rotatably connected with the smoothing roller 15, the smoothing roller 15 corresponds to the rotating roller 4. The fixed blocks 19 are fixed on the upper ends of the sliding columns 17, the springs 18 are sleeved on the sliding columns 17, and the ends of the springs 18 are fixedly connected with the fixed blocks 19 and the moving plate 22. The limiting plates 20 are fixed on the two sides of the frame body 1, the moving screws 21 are rotatably connected with the limiting plates 20, the moving screws 21 are threadedly connected with the moving plate 22, penetrate through the moving plate 22, and have handles fixed on the upper ends, the guide columns 23 are slidably arranged on the end, away from the moving screws 21, of the moving plate 22, and the guide columns 23 are fixedly connected with the limiting plates 20. The blowing pipe 28 is fixed on one end of the fan 6, the fan 6 has a ventilation pipe fixed on the end, the blowing pipe 28 penetrates into the support frame 2 and is fixedly connected with the fixed pipes 24, the fixed pipes 24 are fixed with the shunt pipes 25 on one side and are arrayed and distributed, the shunt pipes 25 correspond to the rubber printing roller 3, the two symmetrical fixed sleeves 27 are fixed on the support frame 2 and penetrate through the support frame 2, one end of the two fixed sleeves 27 is fixed through the connecting pipe 26, the end, away from the connecting pipe 26, of the fixed sleeve 27 is provided with a water inlet, and the rubber printing roller 3 is sleeved on the fixed sleeve 27 and is rotatably arranged.

[0039] In use, the smoothing roller 15 is in contact with the paper and is matched with the rotating roller 4 to smooth the paper, the spring 18 provides an elastic force to the sliding column 17, the sliding column 17 provides a force to the fixed plate 16, the fixed plate 16 provides a force to the smoothing roller 15 to be in contact with the paper on the rotating roller 4, the paper is prevented from being wrinkled, the thickness of the paper is adapted, and the paper is conveniently printed, when the contact force needs to be adjusted, the handle is twisted to drive the moving screw 21 to rotate, the moving screw 21 drives the moving plate 22 to move, the moving plate 22 is limited to slide on the guide column 23, the moving plate 22 drives the smoothing roller 15 to move, the spring 18 provides an elastic force, the contact force on the paper is conveniently adjusted, the paper is prevented from being wrinkled, and the paper is conveniently printed, when printing, the fan 6 is started to generate wind, the wind enters the fixed pipe 24 through the blowing pipe 28, then enters the shunt pipes 25 on the fixed pipe 24 to blow and cool the rubber printing roller 3, the high temperature of the rubber printing roller 3 is prevented from affecting the printing quality, meanwhile, the water pump is connected to the water inlet of the fixed sleeve 27 to draw water into the fixed sleeve 27, the heat generated by the rubber printing roller 3 enters the fixed sleeve 27, the water carries away the heat, the heat dissipation effect is improved, the water flows through the connecting pipe 26 and then flows out of the other fixed sleeve 27, and the heat dissipation effect is improved.

[0040] The implementation principle of the rotary offset printing machine is as follows: when the rotary offset printing machine is used, the staff places the paper to be printed on the paper winding device, the paper is moved by the plurality of rotating rollers 4, and at the same time, the printing roller 3 is started to continuously print the paper;

[0041] When the rotary offset printing machine is used, the light sensor 14 is started to detect the fluctuation, position and movement speed of the passing paper, and when an abnormality is detected, the controller 13 is fed back, the motor 7 is started by the controller 13, the motor 7 drives the adjusting screw 8 to rotate, the adjusting screw 8 drives the adjusting block 9 to move, the adjusting block 9 drives the adjusting roller 12 to move, the tension of the paper on the adjusting roller 12 is adjusted, the limiting block 11 is slid on the adjusting column 10, the adjusting column 10 is limited, and the tension of the paper is adjusted;

[0042] When the rotary offset printing machine is used, the flattening roller 15 is in contact with the paper passing through the rotating roller 4 to flatten the paper, and in the flattening process, the spring 18 is stressed, the sliding column 17 is stressed, the fixed plate 16 is stressed, the flattening roller 15 is stressed to contact the paper on the rotating roller 4, the wrinkles of the paper are reduced, the thickness of the different printing paper is adapted, and the printing of the paper is facilitated, when the contact force needs to be adjusted, the handle is twisted to drive the moving screw 21 to rotate, the moving screw 21 drives the moving plate 22 to move, the moving plate 22 is limited on the guide column 23, the moving plate 22 drives the flattening roller 15 to move, the contact force on the paper is adjusted, the wrinkles are reduced, and the printing of the paper is facilitated, when printing, the fan 6 is started, the fan 6 generates wind, the wind enters the fixed pipe 24 through the blowing pipe 28, and then the wind is blown and cooled on the printing roller 3 through the plurality of shunt pipes 25 on the fixed pipe 24, the situation that the high temperature affects the printing quality is reduced, at the same time, the water pump is connected to the water inlet of the fixed sleeve 27 to pump water, the water enters the fixed sleeve 27, the heat generated by the printing roller 3 enters the fixed sleeve 27, the heat is taken away by the entering water, the heat dissipation effect is improved, the water flows through the connecting pipe 26 and then flows out through another fixed sleeve 27, and the water tank is connected to facilitate the recycling of the water.

Claims

1. A rotary offset printing machine, comprising a frame (1), characterized in that: A support frame (2) is fixed on the frame (1). An ink roller (3) is installed inside the support frame (2). Multiple rotating rollers (4) are installed inside one end of the frame (1). A paper roll device is installed at one end of the frame (1). A fixed frame (5) is fixed on the side of the frame (1) away from the support frame (2). A motor (7) is fixed on the fixed frame (5). The output end of the motor (7) extends into the fixed frame (5). A fan (6) is fixed on the support frame (2). An adjustment mechanism is provided between the motor (7) and the frame (1).

2. The rotary offset printing machine according to claim 1, characterized in that: The adjustment mechanism includes an adjustment screw (8) fixed to the output end of the motor (7), an adjustment block (9) is threadedly connected to the adjustment screw (8), an adjustment roller (12) is rotatably connected to one side of the adjustment block (9), the adjustment block (9) is slidably disposed with the frame (1), and a limiting component is provided between the adjustment roller (12) and the frame (1).

3. A rotary offset printing machine according to claim 2, characterized in that: The limiting component includes an adjusting column (10) fixed on the frame (1), a limiting block (11) rotatably connected to the end of the adjusting roller (12) away from the adjusting block (9), the adjusting column (10) sliding through the limiting block (11), the limiting block (11) slidingly disposed with the frame (1), the upper end of the adjusting column (10) being fixedly connected to the fixed frame (5), and an adjusting element being disposed between the adjusting block (9) and the fixed frame (5).

4. A rotary offset printing machine according to claim 3, characterized in that: The adjusting component includes a photoelectric sensor (14) fixed on the adjusting block (9), and a controller (13) is fixed on one side of the fixing frame (5). The controller (13) is electrically connected to the photoelectric sensor (14) and the controller (13) is electrically connected to the motor (7).

5. A rotary offset printing machine according to claim 1, characterized in that: The frame (1) is provided with a movable plate (22), and two symmetrical sliding columns (17) are slidably arranged on the movable plate (22). The sliding columns (17) pass through the movable plate (22) and are fixedly connected to a fixed plate (16). A smoothing roller (15) is rotatably connected between the two fixed plates (16), and the smoothing roller (15) corresponds to the rotating roller (4).

6. A rotary offset printing machine according to claim 5, characterized in that: The upper end of the sliding column (17) is fixedly connected to a fixing block (19), and a spring (18) is sleeved on the sliding column (17). The ends of the spring (18) are fixedly connected to the fixing block (19) and the moving plate (22).

7. A rotary offset printing machine according to claim 6, characterized in that: Both sides of the frame (1) are fixed with limiting plates (20). A movable screw (21) is rotatably connected to the limiting plate (20). The movable screw (21) is threadedly connected to the movable plate (22). The movable screw (21) passes through the movable plate (22). A handle is fixed at the upper end of the movable screw (21). A guide post (23) is slidably provided at the end of the movable plate (22) away from the movable screw (21). The guide post (23) is fixedly connected to the limiting plate (20).

8. A rotary offset printing machine according to claim 1, characterized in that: One end of the blower (6) is fixed with a blower pipe (28), and the end of the blower (6) is fixed with a ventilation pipe. The blower pipe (28) extends into the support frame (2) and is fixedly connected with a fixed pipe (24). A diversion pipe (25) is fixed on one side of the fixed pipe (24) and is arranged in an array. The diversion pipe (25) corresponds to the printing roller (3). Two symmetrical fixed sleeves (27) are fixed on the support frame (2). The fixed sleeves (27) penetrate the support frame (2). One end of the two fixed sleeves (27) is fixed through a connecting pipe (26). A water inlet is opened at the end of the fixed sleeve (27) away from the connecting pipe (26). The printing roller (3) is sleeved on the fixed sleeve (27) and rotates.

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