A brush roller and printing apparatus

Abstract

The utility model relates to digital printing technical field, concretely discloses a kind of brush roller and printing equipment applied to digital printing technical field, the brush roller at least includes roller, mandrel and is set to the brush of the roller, the brush is made of several brush filaments, the brush filament is vertically arranged relative to the axial direction of the roller, the included angle A is arranged between the brush filament and the radial direction of the roller, wherein, 0°≤A≤90°, in the circumferential direction of roller, the inclination direction of the brush filament is same. Among them, brush filament is inclinedly arranged relative to the radial direction of roller, forms the radial elastic self-adapting structure form of more flexible, can realize the change of self-adapting tension;Since the inclination direction of brush filament is only related to paper direction, can play the role of self-adapting tightness, but will not cause the displacement of paper in width (i. e. brush roller axial direction) direction, thereby the printing precision and the effect of paper roll are well guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of digital printing technology, specifically to a brush roller and printing equipment applied in the field of digital printing technology. Background Technology

[0002] Digital printers are the most commonly used digital printing medium, with a very wide range of applications. Inkjet printing, as the mainstream printing method, can print on various media, such as various types of paper, polymer film media and films, and various fabrics, and its application scenarios are becoming increasingly broad. For general printing media, especially paper-based printing media, roll paper is prone to moisture absorption and deformation, or deformation due to poor quality control during the roll production process. When using this type of low-quality roll paper, the paper feeding system, composed of drive rollers and various guide rollers with different functions, drives the paper movement. During the paper movement, uneven tension is generated in the width direction of the paper, causing a phenomenon similar to "slightly tight edges" (here, "slightly tight edges" is just a common term and does not mean only the two sides of the paper, but also includes any position with different tension in the width direction of the paper), thereby reducing print quality.

[0003] Chinese utility model patent CN208789253U discloses a printing machine and its brush roller, which includes a roller, a core shaft, and brush strips. The brush filaments of each brush group form a preset angle with the axis of the roller, ranging from 15 to 85 degrees. The brush filaments of the left and right brush groups in each groove are inclined towards the left and right ends of the roller, respectively. This type of brush roller structure mainly serves to support and unfold paper wrinkles. It also has a certain adaptive function to the paper's "tightness edge." However, due to this structure, during the compression and deformation process, the paper at the supporting part will experience "axial movement." This "axial movement" can cause local displacement in the width direction of the paper during its travel, thus affecting printing accuracy or the paper roll's retraction effect. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to address the technical defect in the prior art where the brush filaments of the brush roller form a preset angle with the axis of the roller, which causes displacement of the printing medium in the width direction during the compression and deformation of the brush, thus affecting the printing accuracy or the paper roll retraction effect.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a brush roller, comprising at least a roller, a mandrel, and a brush disposed on the roller, the brush being composed of a plurality of bristles, the bristles being disposed perpendicular to the axial direction of the roller, and the bristles being disposed at an angle A with the radial direction of the roller, wherein 0° < A < 90°, and the bristles being in the same inclination direction in the circumferential direction of the roller.

[0006] In a preferred embodiment, the brush extends spirally along the axial and circumferential directions on the roller.

[0007] In a preferred embodiment, the spiral angle of the brush is B, where 0° < B < 45°.

[0008] In a preferred embodiment, the brushes are evenly distributed on the outer peripheral surface of the roller.

[0009] In a preferred embodiment, the brush extends along the axial direction of the roller, and multiple sets of the axially extending brushes are arranged along the circumferential direction of the roller.

[0010] In a preferred embodiment, a plurality of axially extending brush bases are evenly distributed along the circumferential direction on the roller, the brush bases are embedded in the roller, and a plurality of brush filaments are provided on the brush bases.

[0011] In a preferred embodiment, the brush base is fixedly disposed on the outer circumferential surface of the roller, and an angle A is provided between the brush base and the radial direction of the roller, wherein 0° < A < 90°; in the circumferential direction of the roller 1, all the brush bases have the same inclination direction, and the inclination direction of the brush bristles relative to the radial direction in the circumferential direction is consistent with that of the brush base.

[0012] In a preferred embodiment, the brush base is disposed on the outer circumferential surface of the roller and integrally formed with the roller. The brush base is provided with a slot, and the brush bristles are inserted into the slot. An angle A is provided between the brush base and the radial direction of the roller, wherein 0° < A < 90°. In the circumferential direction of the roller 1, the inclination direction of all the brush bases is the same, and the inclination direction of the brush bristles in the circumferential direction relative to the radial direction is consistent with that of the brush base.

[0013] In a preferred embodiment, the radial height of the brush bristles is distributed in a stepped or wavy manner in the axial direction of the roller.

[0014] This embodiment also discloses a printing apparatus, which includes at least the aforementioned brush roller.

[0015] In this embodiment of the brush roller and printing equipment, the brush filaments on the brush roller are arranged perpendicularly to the axial direction of the roller, and an angle A is formed between the brush filaments and the radial direction of the roller, wherein 0° < A < 90°, and the brush filaments are tilted in the same direction along the circumference of the roller. This arrangement has the following advantages compared to the prior art: (1) The brush bristles are set at an inclination relative to the radial direction of the roller, forming a more flexible radial elastic adaptive structure. This allows the brush to be fully extended outward in areas where the paper is "loose" and has slightly less support and tension. In areas where the paper is "tight," the brush bristles can bend more inward along the inclination direction under greater tension, thereby achieving adaptive tension change.

[0016] (2) The bristles exhibit different radial inclination states at different tightness positions, which is equivalent to "following the shape" to form different guide roller diameters. Thus, along with the paper's movement and the synchronous rotation of the brush roller, different parts of the brush roller can adaptively extend different inclination angles according to the tightness of the paper at that part. Under the active maintenance of a certain tension, each width of the paper is pressed against the brush, thereby sending out the uneven paper with "tightness edge".

[0017] (3) The relatively radially inclined bristles can effectively adapt to the different paper travel requirements. Since the inclination direction of the bristles is only related to the paper feed direction, it can play a self-adjusting role in tension, but will not cause the paper to shift in the width direction (i.e., the axial direction of the brush roller), thus ensuring the printing accuracy and paper roll retraction effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the brush roller structure shown in Embodiment 1; Figure 2 for Figure 1 A schematic diagram of the longitudinal section of the brush roller shown; Figure 3 This is a schematic diagram of the brush roller structure shown in Embodiment 2; Figure 4 for Figure 3 A schematic diagram of the longitudinal section of the brush roller shown; Figure 5 This is a schematic diagram of the brush roller structure shown in Example 3; Figure 6 for Figure 5 A schematic diagram of the longitudinal section of the brush roller shown; Figure 7 This is a schematic diagram of the longitudinal section of the brush roller shown in Example 4; Figure 8 This is a schematic diagram of the longitudinal section of the brush roller shown in Example 5; Figure 9 This is a schematic diagram of the longitudinal section of the brush roller shown in Embodiment Six; Figure 10 This is a schematic diagram of the brush roller structure shown in Embodiment Six; Figure 11 This is a schematic diagram of the structure of the brush roller shown in Embodiment 7. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0022] Example 1 This embodiment describes a brush roller used in printing equipment, such as... Figure 1 , Figure 2 As shown, it includes a roller 1, a spindle 4, and a brush 2 disposed on the roller 1, wherein the brush 2 is composed of a plurality of bristles 3.

[0023] As a special feature of this embodiment, the brush bristles 3 are arranged perpendicularly to the axial direction of the roller 1, and an angle A is formed between the brush bristles 3 and the radial direction of the roller 1, wherein 0° < A < 90°. Furthermore, all the brush bristles 3 have the same inclination direction along the circumference of the roller 1.

[0024] As a preferred embodiment, in this case, Figure 1 As shown, the brush 2 extends spirally along the axial and circumferential directions on the roller 1. Preferably, the helix angle of the brush 2 is B, where 0° < B < 45°.

[0025] Example 2 This embodiment describes a brush roller used in printing equipment, such as... Figure 3 , Figure 4As shown, the difference from Embodiment 1 is that the brush 2 is evenly distributed on the outer circumferential surface of the roller 1, and the inclination of the brush bristles is the same as in Embodiment 1. This type of brush roller structure applies a more even force to the printing medium.

[0026] Example 3 This embodiment describes a brush roller used in printing equipment, such as... Figure 5 , Figure 6 As shown, the difference from Embodiment 1 is that multiple axially extending brush bases 5 are evenly distributed along the circumferential direction on the roller 1, and several brush filaments 3 are evenly distributed on the brush base 5, thereby forming multiple sets of brushes 2 arranged along the circumferential direction of the roller. The inclination of the brush filaments 3 on the brush 2 is the same as in Embodiment 1.

[0027] Preferably, in this embodiment, the brush base 5 is embedded in the roller 1.

[0028] The characteristic of this type of brush roller is that the brush filaments alternately and intermittently contact the printing medium during the rotation of the brush roller.

[0029] Example 4 This embodiment describes a brush roller used in printing equipment, such as... Figure 7 As shown, the axially extending brush 2 includes a brush base 5 and brush bristles disposed on the brush base 5. The difference between this embodiment and Embodiment 3 is that the brush base 5 is fixedly disposed on the outer circumferential surface of the roller 1, and an angle A is formed between the brush base 5 and the radial direction of the roller 1, wherein 0° < A < 90°. Furthermore, in the circumferential direction of the roller 1, all the brush bases 5 have the same inclination direction.

[0030] In this embodiment, the bristles 3 are disposed on the brush base 5, and the extension direction of the bristles 3 is consistent with the direction of the brush base 5, that is, the inclination direction of the bristles 3 in the circumferential direction relative to the radial direction is consistent with the brush base 5.

[0031] Preferably, in this embodiment, the brush base 5 is fixedly disposed on the outer peripheral surface of the roller 1 by welding.

[0032] Example 5 This embodiment describes a brush roller used in printing equipment, such as... Figure 8 As shown, the brush 2 extending axially includes a brush base 5 and brush bristles disposed on the brush base 5. The difference between this embodiment and embodiment four is that the roller 1 is provided with an insertion part 6 for inserting the brush base 5, the insertion part 6 is provided with a slot, and the brush base 5 is located in the slot.

[0033] Preferably, in this embodiment, the insertion part 6 and the roller 1 are integrally formed. Typically, the insertion part 6 and the roller 1 are integrally hot-extruded from an aluminum alloy profile. Of course, this is only a preferred embodiment, and other machining methods can also be used for processing.

[0034] In this embodiment, an angle A is provided between the insertion part 6 and the radial direction of the roller 1, wherein 0° < A < 90°. Furthermore, all insertion parts 6 have the same inclination direction in the circumferential direction of the roller 1. The extension direction of the brush bristles 3 is consistent with the direction of the insertion part 6; that is, the inclination direction of the brush bristles 3 relative to the radial direction in the circumferential direction is consistent with that of the insertion part 6.

[0035] Example 6 This embodiment describes a brush roller used in printing equipment, such as... Figure 9 , Figure 10 As shown, the axially extending brush 2 includes a brush base 5 and brush bristles 3 disposed on the brush base 5. Similar to embodiments one through five described above, the brush bristles 3 are arranged perpendicularly to the axial direction of the roller 1, and an angle A is formed between the brush bristles 3 and the radial direction of the roller 1, wherein 0° < A < 90°. Furthermore, all the brush bristles 3 have the same inclination direction along the circumference of the roller 1.

[0036] As a special feature of this embodiment, the radial height of the brush bristles is distributed in a stepped alternating pattern in the axial direction of the roller.

[0037] Example 7 This embodiment describes a brush roller used in printing equipment, such as... Figure 11 As shown, the difference from Embodiment Six is ​​that the radial height of the brush bristles is distributed in a wavy pattern in the axial direction of the roller.

[0038] As shown in Examples 6 and 7, this undulating axial wave shape design, axial stepped design, or other alternating axial outer contour design allows the bristles to absorb the deformation in the paper feeding direction due to the inclination of the radial angle A, and also to support the paper in the lateral deformation, thus reducing the wrinkles and displacement of the paper caused by lateral deformation to a certain extent.

[0039] It should be noted that the stepped alternating distribution pattern shown in Example 6 and the wave-like distribution pattern shown in Example 7 are also applicable to Examples 2 to 5.

[0040] In summary, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements 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 brush roller, comprising at least a roller, a mandrel, and a brush disposed on the roller, the brush being composed of a plurality of bristles, characterized in that, The brush bristles are arranged perpendicular to the axial direction of the roller, and there is an angle A between the brush bristles and the radial direction of the roller, wherein 0° < A < 90°, and the brush bristles are in the same inclination direction in the circumferential direction of the roller.

2. The brush roller according to claim 1, characterized in that, The brush extends spirally along the axial and circumferential directions on the roller.

3. The brush roller according to claim 2, characterized in that, The spiral angle of the brush is B, where 0° < B < 45°.

4. The brush roller according to claim 1, characterized in that, The brushes are evenly distributed on the outer circumferential surface of the roller.

5. The brush roller according to claim 1, characterized in that, The brush extends along the axial direction of the roller, and multiple sets of the axially extending brushes are arranged along the circumferential direction of the roller.

6. The brush roller according to claim 5, characterized in that, The roller has multiple axially extending brush bases evenly distributed along the circumferential direction. The brush bases are embedded in the roller and have a number of brush filaments.

7. The brush roller according to claim 6, characterized in that, The brush base is fixedly disposed on the outer circumferential surface of the roller, and an angle A is provided between the brush base and the radial direction of the roller, wherein 0° < A < 90°; in the circumferential direction of the roller 1, all the brush bases have the same inclination direction, and the inclination direction of the brush bristles relative to the radial direction in the circumferential direction is consistent with that of the brush base.

8. The brush roller according to claim 6, characterized in that, The brush base is disposed on the outer circumferential surface of the roller and integrally formed with the roller. The brush base is provided with a slot, and the brush bristles are inserted into the slot. An angle A is provided between the brush base and the radial direction of the roller, wherein 0° < A < 90°. In the circumferential direction of the roller 1, the inclination direction of all the brush bases is the same, and the inclination direction of the brush bristles in the circumferential direction relative to the radial direction is consistent with that of the brush base.

9. The brush roller according to any one of claims 1, 5-8, characterized in that, The radial height of the brush bristles is distributed in an alternating stepped or wavy pattern in the axial direction of the roller.

10. A printing apparatus, characterized in that, It includes at least the brush roller as described in any one of claims 1-9.

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