Roller assembly for conveying printing paper

Abstract

According to the roller assembly used for conveying the printing paper, the first eccentric wheel, the second eccentric wheel, the first supporting plate and the second supporting plate are arranged, when the roller assembly needs to be in a separated state, only the eccentric wheels need to be rotated, and the wheel faces of the eccentric wheels are supported by the supporting plates; the rotating shaft of the eccentric wheel can be pushed to move upwards, so that the upper roller is driven to ascend, and the roller surfaces of the upper roller and the lower roller are mutually separated; and when the roller wheel assembly needs to be in a pressing state, under the action of the first elastic assembly and the second elastic assembly, the roller surfaces of the upper roller and the lower roller can be attached to each other and have pressing force, so that the roller wheel assembly can be flexibly switched between the pressing state and the separation state according to actual requirements, and operation such as putting in and taking out of paper is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of printing technology, and more specifically, to a roller assembly for conveying printing paper. Background Technology

[0002] The description in this section provides only background information related to the disclosure of this utility model and does not constitute prior art.

[0003] In the field of printing equipment, the roller assembly used to feed printing paper is a crucial component of the printer. Traditional roller assemblies suffer from numerous problems. For example, the pressing and releasing operations of the rollers are often either structurally complex, requiring specialized drive mechanisms and control systems, which significantly increases equipment costs and the probability of malfunctions; or cumbersome to operate, requiring manual adjustments in multiple steps, severely impacting work efficiency. Furthermore, regarding the stability of paper feeding, because the pressing force cannot be automatically adjusted according to paper thickness, paper slippage can easily occur when feeding paper of different thicknesses. This not only leads to misalignment of the printing position, affecting print quality, but can also cause paper jams, further reducing printing efficiency.

[0004] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a roller assembly for conveying printing paper.

[0006] To address the aforementioned technical problems, this utility model provides a roller assembly for conveying printing paper, comprising an upper roller and a lower roller arranged vertically, a first fixing plate and a second fixing plate located at the left and right ends of the upper roller and the lower roller respectively, wherein the first fixing plate is equipped with a first mounting bracket, the first mounting bracket including a first vertical frame arranged in a vertical direction and a first support plate located on the lower side of the first vertical frame, and a first movable plate disposed on the first vertical frame, the first movable plate being movable up and down along the first vertical frame, and the second fixing plate being equipped with a second mounting bracket, the second mounting bracket including a first vertical frame... The system includes a second vertical frame and a second support plate located below the second vertical frame. A second movable plate is mounted on the second vertical frame and can move up and down along the frame. A first eccentric wheel and a second eccentric wheel are fixedly mounted at the left and right ends of the upper roller, respectively. The left and right ends of the lower roller are rotatably mounted on the first fixed plate and the second fixed plate via first bearings and second bearings, respectively. A first elastic component is provided between the first movable plate and the first fixed plate. This first elastic component is used to apply force to the first movable plate when it moves upward along the first vertical frame. A restoring force is applied. A second elastic component is provided between the second movable plate and the second fixed plate. The second elastic component is used to apply a restoring force to the second movable plate when it moves upward along the second vertical frame. The roller assembly has a pressing state and a separating state. When the roller assembly is in the pressing state, the roller surfaces of the upper roller and the lower roller are in contact with each other. The two ends of the first elastic component respectively tighten the first movable plate and the first fixed plate, and the two parts of the second elastic component respectively tighten the second movable plate and the second fixed plate, so that the roller surfaces of the upper roller and the lower roller have mutual pressure. A tight force is applied to maintain the roller assembly in a compressed state. When the roller assembly is in a separated state, the first eccentric wheel rotates at an angle, and the wheel surface of the first eccentric wheel, supported by the first support plate, pushes the rotating shaft of the first eccentric wheel upward, causing the first moving plate to overcome the tension of the first elastic component and rise a distance along the first vertical frame. The second eccentric wheel rotates at an angle, and the wheel surface of the second eccentric wheel, supported by the second support plate, pushes the rotating shaft of the second eccentric wheel upward, causing the second moving plate to overcome the tension of the second elastic component and rise a distance along the second vertical frame, so that the roller surfaces of the upper roller and the lower roller separate from each other.

[0007] Preferably, a rocker arm is mounted on the first eccentric wheel, the rocker arm comprising a connecting rod fixed axially to the shaft of the first eccentric wheel and a rocker arm that is perpendicular to and fixedly disposed to the connecting rod.

[0008] Preferably, the first elastic component includes two first upper lifting rings, two first lower lifting rings, and two first tension springs. The two first upper lifting rings are respectively installed on the front and rear sides of the first movable plate, and the two first lower lifting rings are respectively installed on the front and rear sides of the first fixed plate. The two first lower lifting rings are respectively installed below the two first upper lifting rings. The upper and lower ends of the first tension springs are respectively connected to the corresponding first upper and first lower lifting rings. The second elastic component includes two second upper lifting rings, two second lower lifting rings, and two second tension springs. The two second upper lifting rings are respectively installed on the front and rear sides of the second movable plate, and the two second lower lifting rings are respectively installed on the front and rear sides of the second fixed plate. The two second lower lifting rings are respectively installed below the two second upper lifting rings. The upper and lower ends of the second tension springs are respectively connected to the corresponding second upper and second lower lifting rings.

[0009] Preferably, a first fixing seat is fixedly installed on the lower side of the first fixing plate, and a second fixing seat is fixedly installed on the lower side of the second fixing plate. The two first lower lifting rings are fixedly installed on the first fixing seat, and the two second lower lifting rings are fixedly installed on the second fixing seat.

[0010] Preferably, the first and second upper lifting rings are eye bolts.

[0011] Preferably, the roller surfaces of the upper and lower rollers are made of rubber or polyurethane material.

[0012] Preferably, the first mounting bracket includes two first vertical frames arranged in a front-to-back direction, and the second mounting bracket includes two second vertical frames arranged in a front-to-back direction.

[0013] Based on the above technical solution, the beneficial effects of this utility model are as follows:

[0014] This invention relates to a roller assembly for conveying printing paper. By incorporating a first eccentric wheel and a second eccentric wheel, along with corresponding first and second support plates, the roller assembly can be separated when needed. Rotating the eccentric wheel, supported by the support plates, moves its axis upwards, causing the upper roller to rise and separating the upper and lower roller surfaces. Conversely, when in a compressed state, the first and second elastic components allow the upper and lower roller surfaces to adhere and press against each other, enabling the roller assembly to flexibly switch between compressed and separated states as required, facilitating paper loading and unloading. The first and second elastic components, when in the compressed state, tighten corresponding moving and fixed plates at their ends, providing stable pressure to the upper and lower rollers. This ensures the printing paper is stably held between the rollers during transport, preventing slippage and improving the stability and reliability of the paper conveying process, thus contributing to better printing quality. The first and second elastic components, when the roller assembly is in the pressed state, respectively tighten the corresponding moving plate and fixed plate at both ends, which can provide a stable clamping force for the upper and lower rollers, ensuring that the printing paper can be stably clamped between the upper and lower rollers during the conveying process, avoiding slippage of the paper during the conveying process, thereby improving the stability and reliability of the printing paper conveying and helping to ensure printing quality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the roller assembly for conveying printing paper according to this utility model.

[0016] Figure 2 This is a schematic diagram of the structure of the roller assembly for conveying printing paper according to this utility model.

[0017] Figure 3 This is a schematic diagram of the structure of the roller assembly for conveying printing paper according to this utility model.

[0018] Figure 4 This is a structural schematic diagram of the mounting bracket of this utility model.

[0019] Wherein: 1. Upper roller; 2. Lower roller; 3. First fixed plate; 4. First mounting bracket; 41. First support plate; 42. First vertical frame; 5. First movable plate; 6. First upper lifting ring; 7. First tension spring; 8. First lower lifting ring; 9. First fixed seat; 10. First eccentric wheel; 11. First bearing; 12. Connecting rod; 13. Rocker arm; 14. Second mounting bracket; 141. Second support plate; 15. Second movable plate; 16. Second eccentric wheel; 17. Second upper lifting ring; 18. Second tension spring; 19. Second lower lifting ring; 20. Second bearing; 21. Second fixed seat. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] It should be noted that in the description of this utility model, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] like Figure 1-4As shown, this utility model provides a roller assembly for conveying printing paper, including an upper roller 1 and a lower roller 2 arranged vertically, a first fixing plate 3 and a second fixing plate located at the left and right ends of the upper roller 1 and the lower roller 2 respectively. The first fixing plate 3 is equipped with a first mounting bracket 4, which includes a first vertical frame 42 arranged vertically and a first support plate 41 located below the first vertical frame 42. A first movable plate 5 is provided on the first vertical frame 42, and the first movable plate 5 can move vertically along the first vertical frame 42. The second fixing plate is equipped with a second mounting bracket 14, which includes a second fixed plate 14 arranged vertically. A vertical frame and a second support plate 141 located below the second vertical frame. A second movable plate 15 is provided on the second vertical frame, and the second movable plate 15 can move up and down along the second vertical frame. A first eccentric wheel 10 and a second eccentric wheel 16 are respectively fixedly installed at the left and right ends of the upper roller 1. The left and right ends of the lower roller 2 are rotatably mounted on the first fixed plate 3 and the second fixed plate via a first bearing 11 and a second bearing 20, respectively. A first elastic component is provided between the first movable plate 5 and the first fixed plate 3. The first elastic component is used to adjust the first movable plate 5 when it moves upward along the first vertical frame 42. A restoring force is applied. A second elastic component is provided between the second movable plate 15 and the second fixed plate. The second elastic component is used to apply a restoring force to the second movable plate 15 when it moves upward along the second vertical frame. The roller assembly has a pressing state and a separating state. When the roller assembly is in the pressing state, the roller surfaces of the upper roller 1 and the lower roller 2 are in contact with each other. The two ends of the first elastic component respectively tighten the first movable plate 5 and the first fixed plate 3, and the two parts of the second elastic component respectively tighten the second movable plate 15 and the second fixed plate, so that the roller surfaces of the upper roller 1 and the lower roller 2 have a mutual pressing force. The roller assembly is kept in a pressed state; when the roller assembly is in a separated state, the first eccentric wheel 10 rotates at an angle, and the wheel surface of the first eccentric wheel 10, supported by the first support plate 41, pushes the rotating shaft of the first eccentric wheel 10 to move upward, causing the first moving plate 5 to overcome the tension of the first elastic component and rise a distance along the first vertical frame 42. The second eccentric wheel 16 rotates at an angle, and the wheel surface of the second eccentric wheel 16, supported by the second support plate 141, pushes the rotating shaft of the second eccentric wheel 16 to move upward, causing the second moving plate 15 to overcome the tension of the second elastic component and rise a distance along the second vertical frame, so that the roller surfaces of the upper roller 1 and the lower roller 2 are separated from each other.

[0023] A rocker arm 13 is mounted on the first eccentric wheel 10. The rocker arm 13 includes a connecting rod 12 fixed axially to the rotating shaft of the first eccentric wheel 10 and a rocker arm 13 fixedly arranged perpendicular to the connecting rod 12. The user can rotate the first eccentric wheel 10 by manipulating the rocker arm 13, thereby conveniently changing the distance between the upper roller 1 and the lower roller 2, realizing the switching between the pressing and separating states of the roller assembly, and improving the convenience of operation. The first elastic component includes two first upper hanging rings 6, two first lower hanging rings 8, and two first tension springs 7. The two first upper hanging rings 6 are respectively installed on the front and rear sides of the first movable plate 5, and the two first lower hanging rings 8 are respectively installed on the front and rear sides of the first fixed plate 3. The two first lower hanging rings 8 are respectively installed on the lower side of the two first upper hanging rings 6. The upper and lower ends of the first tension springs 7 are respectively connected to the corresponding first upper hanging rings 6 and first lower hanging rings 8. The second elastic component includes two second upper hanging rings 17, two second lower hanging rings 19, and two second tension springs 18. The two second upper hanging rings 17 are respectively installed on the front and rear sides of the second movable plate 15, and the two second lower hanging rings 19 are respectively installed on the front and rear sides of the second fixed plate. The two second lower hanging rings 19 are respectively installed on the lower side of the two second upper hanging rings 17. The upper and lower ends of the second tension springs 18 are respectively connected to the corresponding second upper hanging rings 17 and second lower hanging rings 19. A first fixing seat 9 is fixedly installed on the lower side of the first fixing plate 3, and a second fixing seat 21 is fixedly installed on the lower side of the second fixing plate. Two first lower lifting rings 8 are fixedly installed on the first fixing seat 9, and two second lower lifting rings 19 are fixedly installed on the second fixing seat 21. In a preferred embodiment, the first upper lifting ring 6 and the second upper lifting ring 17 are lifting ring screws, and the roller surfaces of the upper roller 1 and the lower roller 2 are made of rubber or polyurethane material. The first mounting bracket 4 includes two first vertical frames 42 arranged in a front-to-back direction, and the second mounting bracket 14 includes two second vertical frames arranged in a front-to-back direction.

[0024] The roller assembly for conveying printing paper of this utility model, by setting a first eccentric wheel 10 and a second eccentric wheel 16, and a first support plate 41 and a second support plate 141 that cooperate with them, allows the roller assembly to be in a separated state when it is necessary to rotate the eccentric wheel. The wheel surface of the eccentric wheel, supported by the support plate, can push the eccentric wheel's rotation axis to move upward, thereby driving the upper roller 1 to rise and realizing the separation of the roller surfaces of the upper roller 1 and the lower roller 2. When it is necessary to be in a pressed state, under the action of the first elastic component and the second elastic component, the roller surfaces of the upper roller 1 and the lower roller 2 can be pressed together and have a mutual pressing force, so that the roller assembly can flexibly switch between the pressed state and the separated state according to actual needs, which is convenient for operations such as paper loading and unloading. The first and second elastic components, when the roller assembly is in the pressed state, respectively tighten the corresponding moving plates and fixed plates at both ends, providing a stable clamping force for the upper roller 1 and lower roller 2. This ensures that the printing paper is stably clamped between the upper and lower rollers 2 during transport, preventing slippage and improving the stability and reliability of the printing paper transport, thus contributing to ensuring print quality.

[0025] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A roller assembly for feeding print paper, characterized by, The utility model relates to a roller assembly of a printing machine, The upper roller and the lower roller are arranged in a vertical manner, the first fixed plate and the second fixed plate are respectively arranged at the left and right ends of the upper roller and the lower roller, The first fixed plate is provided with a first mounting bracket, the first mounting bracket comprises a first vertical frame arranged in a vertical direction and a first support plate arranged at the lower side of the first vertical frame, The second fixed plate is provided with a second mounting bracket, the second mounting bracket comprises a second vertical frame arranged in a vertical direction and a second support plate arranged at the lower side of the second vertical frame, The left and right ends of the upper roller are respectively provided with a first eccentric wheel and a second eccentric wheel, The left and right ends of the lower roller are rotatably arranged on the first fixed plate and the second fixed plate through a first bearing and a second bearing, The first elastic component is arranged between the first moving plate and the first fixed plate, and is used for applying a restoring force to the first moving plate when the first moving plate moves upwards along the first vertical frame, The second elastic component is arranged between the second moving plate and the second fixed plate, and is used for applying a restoring force to the second moving plate when the second moving plate moves upwards along the second vertical frame, The roller assembly has a compression state and a separation state, When the roller assembly is in the compression state, the roller surfaces of the upper roller and the lower roller are in close contact with each other, the two ends of the first elastic component are respectively pulled to the first moving plate and the first fixed plate, the two ends of the second elastic component are respectively pulled to the second moving plate and the second fixed plate, the roller surfaces of the upper roller and the lower roller have a compression force, and the roller assembly is maintained in the compression state; When the roller assembly is in the separation state, the first eccentric wheel rotates by an angle, the wheel surface of the first eccentric wheel is supported by the first support plate, the rotating shaft of the first eccentric wheel is pushed to move upwards, the first moving plate is driven to move upwards along the first vertical frame by a distance after overcoming the pulling force of the first elastic component, the second eccentric wheel rotates by an angle, the wheel surface of the second eccentric wheel is supported by the second support plate, the rotating shaft of the second eccentric wheel is pushed to move upwards, the second moving plate is driven to move upwards along the second vertical frame by a distance after overcoming the pulling force of the second elastic component, and the roller surfaces of the upper roller and the lower roller are separated from each other.

2. The roller assembly of claim 1, wherein The first eccentric wheel is provided with a rocker, the rocker comprises a connecting rod fixed on the rotating shaft of the first eccentric wheel in an axial direction and a rocker arranged perpendicularly to the connecting rod.

3. The roller assembly of claim 2, wherein, The first elastic component comprises two first upper eyelets, two first lower eyelets and two first tension springs, The two first upper eyelets are respectively arranged on the front and back sides of the first moving plate, The two first lower eyelets are respectively arranged on the front and back sides of the first fixed plate, The two first lower eyelets are respectively arranged on the lower sides of the two first upper eyelets, The upper and lower ends of the first tension spring are connected with corresponding first upper and lower hanging rings, respectively. The second elastic assembly comprises two second upper hanging rings, two second lower hanging rings and two second tension springs, The two second upper hanging rings are respectively installed on the front and rear sides of the second moving plate, The two second lower hanging rings are respectively installed on the front and rear sides of the second fixed plate, The two second lower hanging rings are respectively installed on the lower sides of the two second upper hanging rings, The upper and lower ends of the second tension spring are connected with corresponding second upper and lower hanging rings, respectively.

4. The roller wheel assembly of claim 3, wherein, The lower side of the first fixed plate is further fixedly installed with a first fixed seat, the lower side of the second fixed plate is further fixedly installed with a second fixed seat, and the two first lower hanging rings are fixedly installed on the first fixed seat, and the two second lower hanging rings are fixedly installed on the second fixed seat.

5. The roller assembly of claim 4, wherein, The first upper hanging ring and the second upper hanging ring are hanging ring screws.

6. The roller assembly of claim 1, wherein, The roller surfaces of the upper roller and the lower roller are made of rubber or polyurethane material.

7. The roller assembly of any one of claims 1-6, wherein, The first mounting bracket comprises two first vertical supports arranged in the front-rear direction, and the second mounting bracket comprises two second vertical supports arranged in the front-rear direction.

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