Paper positioning device of digital printing machine

Abstract

The utility model discloses a digital printing machine paper positioning device which comprises a bottom plate and a roll paper body, the upper end of the bottom plate is fixedly connected with two sets of side plates and a placing plate, the positions of the two sets of side plates and the placing plate are mutually symmetrical, two sets of extrusion rollers are rotationally connected between the two sets of side plates, and the two sets of extrusion rollers are arranged in parallel. The outer walls of the two sets of side plates are jointly connected with a fixing plate, the cleaning plate makes contact with the outer walls of the two sets of extrusion rollers, and elastic mechanisms enabling the cleaning plate to be tightly attached to the outer walls of the extrusion rollers are installed on the outer walls of the sliding rods. In the rotating process of the extrusion roller, the cleaning plate is in contact with the outer wall of the extrusion roller, and the surface of the extrusion roller is continuously cleaned through the friction effect. The spring provides continuous pressure, so that the cleaning plate is tightly attached to the outer wall of the extrusion roller all the time, dust, paper scraps and other impurities are effectively removed, cleanliness of the surface of the extrusion roller is guaranteed, impurity accumulation is prevented, and therefore flatness and cleanliness of paper are kept, the printing quality is improved, and stains and flaws caused by dust and impurities are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of paper positioning, in particular to a paper positioning device for a digital printing press. Background Art

[0002] A printing press is a machine for printing text and images. A modern printing press is generally composed of mechanisms such as plate loading, inking, embossing, and paper feeding. Its working principle is: first, the text and image to be printed are made into printing plates and then installed on the printing press.

[0003] A Chinese utility model with authorization announcement number CN215204029U discloses a paper positioning mechanism for a printing press. When in use, the device flattens the paper through the action of an upper squeezing roller and a lower squeezing roller to avoid the problem that paper wrinkles affect subsequent printing work. However, during specific use, dust particles suspended in the air in the printing workshop will be deposited on the surface of the equipment, including the outer wall of the squeezing roller, as the air flows. When the paper contacts the outer wall of the squeezing roller, the dust will adhere to the outer wall of the paper. The dust will be transferred to the surface of the paper, resulting in a decrease in printing quality, such as stains, spots or other defects, which affect the final printing effect. Therefore, it is necessary to redesign a paper positioning device for a digital printing press to address the above problems. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a paper positioning device for a digital printing press.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A paper positioning device for a digital printing press comprises a bottom plate and a paper roll body, wherein two groups of side plates and a placement plate are fixedly connected to the upper end of the bottom plate, and the positions of the two groups of side plates and the placement plate are symmetrical to each other, and two groups of squeezing rollers are rotatably connected between the two groups of side plates, and the outer walls of the two groups of side plates are commonly connected to a fixed plate, and the outer walls of the fixed plates are slidably connected to two groups of sliding rods, and the ends of the two groups of sliding rods are fixedly connected to cleaning plates, and the cleaning plates are respectively in contact with the outer walls of the two groups of squeezing rollers, and the outer walls of the sliding rods are installed with elastic mechanisms that make the cleaning plates fit tightly against the outer walls of the squeezing rollers.

[0007] Preferably, the elastic mechanism comprises a limit block fixedly connected to the end of the sliding rod, the outer wall of the sliding rod is sleeved with a spring, one end of the spring is fixedly connected to the fixing plate, and the other end of the spring is fixedly connected to the limit block.

[0008] Preferably, the radius of the limit block is greater than the radius of the slide rod, and a slide groove is provided on the outer wall of the fixing plate.

[0009] Preferably, the axis of the roll paper body is commonly placed on the upper ends of the two groups of placement plates, and the outer walls thereof are commonly fixedly connected to a fixing frame.

[0010] Preferably, a double-headed threaded rod is rotatably connected to the inner wall of the fixing frame, and two groups of sliding blocks are threadedly connected to the threaded section of the double-headed threaded rod.

[0011] Preferably, the two groups of sliding blocks are fixedly connected with positioning plates, the positioning plates are in contact with the axis of the roll paper body, and the curvatures of the inner and outer walls of the two are consistent.

[0012] Preferably, a limiting groove is formed through the upper end surface of the fixing frame, and the two groups of sliding blocks are slidably connected inside the limiting groove.

[0013] Preferably, the outer walls on both sides of the slider are both arranged in a plane, and the outer wall of the slider is in close contact with the inner wall of the limiting groove.

[0014] Preferably, the outer wall of the fixing frame is rotatably connected with a turning handle, and the turning handle is coaxially and fixedly connected with the double-headed threaded rod.

[0015] The utility model has the following beneficial effects:

[0016] 1. In the process of the squeezing roller rotating, the cleaning plate contacts the outer wall of the squeezing roller and continuously cleans the surface of the squeezing roller through friction. The spring provides continuous pressure, so that the cleaning plate always fits tightly to the outer wall of the squeezing roller, effectively removes dust, paper scraps and other impurities, ensures the cleanliness of the squeezing roller surface, prevents the accumulation of impurities, thereby keeping the paper flat and clean, improving the printing quality, and reducing the stains and defects caused by dust and impurities.

[0017] 2. The utility model drives the slider and the positioning plate to slide toward each other through a double-headed threaded rod, clamps the axis of the roll paper body, accurately aligns its position, and effectively positions it to ensure the stability of the roll paper during transmission. This design not only improves the positioning accuracy of the paper and avoids the deviation of the roll paper during transmission, but also ensures the stability of paper transmission, thereby improving the flatness of the paper and the printing quality during the printing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a paper positioning device for a digital printing press proposed by the utility model;

[0019] Figure 2 for Figure 1 Structural diagram.

[0020] Figure 3 for Figure 1 Section view.

[0021] Figure 4 for Figure 1 Schematic diagram of the structure of the middle slider and positioning plate.

[0022] In the figure: 1. bottom plate; 2. side plate; 3. fixed plate; 4. squeezing roller; 5. cleaning plate; 6. sliding rod; 7. fixing frame; 8. paper roll body; 9. turning handle; 10. placing plate; 11. double-headed threaded rod; 12. limiting groove; 13. limiting block; 14. spring; 15. sliding block; 16. positioning plate. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Reference Figure 1-4 A paper positioning device for a digital printing press comprises a bottom plate 1 and a paper roll body 8. Two groups of side plates 2 and a placement plate 10 are fixedly connected to the upper end of the bottom plate 1. The positions of the two groups of side plates 2 and the placement plate 10 are symmetrical to each other. Two groups of squeezing rollers 4 are rotatably connected between the two groups of side plates 2. The outer walls of the two groups of side plates 2 are commonly connected to a fixed plate 3. The outer walls of the fixed plate 3 are slidably connected to two groups of slide bars 6. The ends of the two groups of slide bars 6 are fixedly connected to cleaning plates 5. The cleaning plates 5 are respectively in contact with the outer walls of the two groups of squeezing rollers 4. The outer walls of the slide bars 6 are equipped with elastic mechanisms that make the cleaning plates 5 fit tightly against the outer walls of the squeezing rollers 4. With the help of the contact between the cleaning plates 5 and the outer walls of the squeezing rollers 4, the surface of the squeezing rollers 4 can be continuously cleaned during the rotation of the squeezing rollers 4, effectively removing dust, paper scraps and other impurities on the surface of the squeezing rollers 4, preventing these impurities from accumulating, and keeping the surface of the squeezing rollers 4 clean.

[0025] The elastic mechanism includes a limit block 13 fixedly connected to the end of the slide rod 6, and a spring 14 is sleeved on the outer wall of the slide rod 6. One end of the spring 14 is fixedly connected to the fixed plate 3, and the other end of the spring 14 is fixedly connected to the limit block 13; the spring 14 can make the cleaning plate 5 always fit the outer wall of the squeezing roller 4 to ensure the cleaning effect.

[0026] The radius of the limit block 13 is larger than the radius of the slide rod 6. A slide groove is provided on the outer wall of the fixed plate 3. The upper ends of the two sets of placement plates 10 are commonly placed with the axis of the roll paper body 8, and the outer walls thereof are commonly fixedly connected with a fixing frame 7. The inner wall of the fixing frame 7 is rotatably connected with a double-headed threaded rod 11. Two sets of sliders 15 are threadedly connected on the threaded section of the double-headed threaded rod 11. Both sets of sliders 15 are fixedly connected with a positioning plate 16. The positioning plate 16 is in contact with the axis of the roll paper body 8, and the curvature of the inner and outer walls of the two are consistent.

[0027] By means of the rotation of the double-headed threaded rod 11, the two sets of positioning plates 16 are driven to slide towards each other, and at the same time, the position of the roll paper body 8 is positioned and adjusted to ensure that the roll paper body 8 can be accurately centered during installation; it should be noted that a driving component for driving the two sets of squeezing rollers 4 is installed on the outer wall of one set of side plates 2.

[0028] A limiting groove 12 is formed through the upper end surface of the fixing frame 7, and two sets of sliders 15 are slidably connected inside the limiting groove 12. The outer walls on both sides of the sliders 15 are arranged in a plane, and the outer walls of the sliders 15 are in close contact with the inner walls of the limiting groove 12. The outer wall of the fixing frame 7 is rotatably connected to a turning handle 9, and the turning handle 9 is coaxially fixedly connected to the double-headed threaded rod 11.

[0029] In the utility model, when the device is used specifically: the axis of the roll paper body 8 is placed on the upper ends of the two groups of placement plates 10, so that the outer walls thereof are clamped on the fixing frame 7, the turning handle 9 is turned to drive the double-headed threaded rod 11 to rotate, so that the two groups of sliders 15 on the threaded section slide toward each other along the limiting grooves 12, the sliders 15 drive the positioning plates 16 to slide toward each other, and clamp the axis of the roll paper body 8 so that its position is accurately centered to ensure the stability of the roll paper body 8 during the transmission process, and then one end of the paper is passed through the two groups of squeezing rollers 4 and the slide grooves on the side walls of the fixing plate 3, and connected to the paper feeding system of the printing press, the squeezing rollers 4 can level the paper to avoid paper wrinkles and ensure the flatness in the subsequent printing process.

[0030] During the rotation of the squeezing roller 4, the cleaning plate 5 contacts the outer wall of the squeezing roller 4, and the surface of the squeezing roller 4 is continuously cleaned through the friction of the cleaning plate 5. During this process, the spring 14 provides continuous pressure to ensure that the cleaning plate 5 is always tightly attached to the outer wall of the squeezing roller 4, effectively removing dust, paper scraps and other impurities, and keeping the surface of the squeezing roller 4 clean.

[0031] After being leveled and cleaned, the paper enters the printing area for printing. Keeping the paper level and clean can improve the printing quality and reduce stains and defects.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A paper positioning device for a digital printing press, comprising a bottom plate (1) and a roll paper body (8), characterized in that: The upper end of the bottom plate (1) is fixedly connected with two groups of side plates (2) and a placement plate (10), and the positions of the two groups of side plates (2) and the placement plate (10) are symmetrical to each other. Two groups of squeezing rollers (4) are rotatably connected between the two groups of side plates (2). The outer walls of the two groups of side plates (2) are commonly connected with a fixed plate (3). The outer walls of the fixed plates (3) are slidably connected with two groups of sliding rods (6). The ends of the two groups of sliding rods (6) are fixedly connected with cleaning plates (5). The cleaning plates (5) are respectively in contact with the outer walls of the two groups of squeezing rollers (4). The outer walls of the sliding rods (6) are installed with elastic mechanisms that enable the cleaning plates (5) to fit tightly against the outer walls of the squeezing rollers (4).

2. A paper positioning device for a digital printing press according to claim 1, characterized in that: The elastic mechanism comprises a limit block (13) fixedly connected to the end of the slide rod (6); the outer wall of the slide rod (6) is sleeved with a spring (14); one end of the spring (14) is fixedly connected to the fixed plate (3); and the other end of the spring (14) is fixedly connected to the limit block (13).

3. A paper positioning device for a digital printing press according to claim 2, characterized in that: The radius of the limit block (13) is greater than the radius of the slide rod (6), and a slide groove is provided on the outer wall of the fixing plate (3).

4. A paper positioning device for a digital printing press according to claim 3, characterized in that: The axis of the roll paper body (8) is commonly placed on the upper ends of the two groups of placement plates (10), and the outer walls thereof are commonly fixedly connected to a fixing frame (7).

5. A paper positioning device for a digital printing press according to claim 4, characterized in that: A double-headed threaded rod (11) is rotatably connected to the inner wall of the fixing frame (7), and two groups of sliding blocks (15) are threadedly connected to the threaded section of the double-headed threaded rod (11).

6. A paper positioning device for a digital printing press according to claim 5, characterized in that: The two groups of sliding blocks (15) are both fixedly connected with a positioning plate (16), the positioning plate (16) is in contact with the axis of the roll paper body (8), and the curvature of the inner and outer walls of the two are consistent.

7. A paper positioning device for a digital printing press according to claim 6, characterized in that: A limiting groove (12) is formed through the upper end surface of the fixing frame (7), and the two groups of sliding blocks (15) are both slidably connected inside the limiting groove (12).

8. The paper positioning device of a digital printing press according to claim 7, characterized in that: The outer walls on both sides of the slider (15) are both arranged in a plane, and the outer wall of the slider (15) is in close contact with the inner wall of the limiting groove (12).

9. The paper positioning device of a digital printing press according to claim 8, characterized in that: The outer wall of the fixing frame (7) is rotatably connected to a turning handle (9), and the turning handle (9) is coaxially and fixedly connected to a double-headed threaded rod (11).

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