Digital printing folding and unfolding mechanism

Abstract

The utility model discloses a digital printing take-up and pay-off mechanism which comprises two frames, a take-up roller, a support and a guide roller, the number of the frames is two, supporting legs are installed at the two ends of the bottoms of the two frames, the take-up roller and the guide roller are installed between the two frames respectively, a gap is formed between the take-up roller and the guide roller, a connecting rod is arranged on one side of each frame, and the connecting rod is connected with the support. A driving assembly is installed on the connecting rod and comprises a driving motor and further comprises a linear guide rail assembly, a limiting blocking piece, a rear limiting sensor and a front limiting sensor. Through cooperation of an expansion roller, a distance measuring sensor, a driving assembly, a rear limiting sensor, a front limiting sensor and a guide roller, the distance measuring sensor measures the linear distance from the expansion roller to the outer diameter face of winding paper of a winding roller in real time, the linear distance from the expansion roller to the outer diameter face of the winding paper in the horizontal direction is adjusted through a driving motor, and it is guaranteed that in the winding process, the winding paper is not damaged. The wrap angles of the expansion roller and the winding roller are fixed, and the distances in the vertical direction are the same, so that the constant tension of the winding on the material is effectively kept.

Description

Technical Field

[0001] This utility model relates to the field of digital printing technology, and in particular to a digital printing take-up and take-down mechanism. Background Technology

[0002] Traditional printing requires plate making before printing, which cannot achieve small-batch or rapid printing. With the market demand for small-batch and personalized products, digital printing, which uses computer color matching and direct output to the print head, prints on demand, breaking through the bottlenecks of traditional printing methods.

[0003] With the expansion of the digital printing market, the demand for cost is also increasing. The thickness of the printing material is a direct economic cost. However, thin materials will deform after ink is applied. In addition, the material's hardness is reduced, which can cause wrinkling or unwinding during winding. This will lead to distortion and damage of the printed image, seriously affecting the yield. Utility Model Content

[0004] This invention proposes a digital printing take-up and take-down mechanism, which, through the cooperation of an extension roller, a distance sensor, a drive assembly, a rear limit sensor, a front limit sensor, and a guide roller, effectively maintains constant tension on the material during take-up and prevents deformation and folding of the material.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A digital printing take-up and take-down mechanism includes a frame, a take-up roller, a bracket, and a guide roller. There are two frames, and support feet are installed at both ends of the bottom of the two frames. The take-up roller and the guide roller are respectively installed between the two frames, and there is a gap between the take-up roller and the guide roller. A connecting rod is provided on one side of the frame, and a drive assembly is installed on the connecting rod. The drive assembly includes a drive motor, a connector is installed at one end of the drive motor, and a drive rod is installed at the top of the connector.

[0007] It also includes a linear guide rail assembly, a limit stop, a rear limit sensor and a front limit sensor. The linear guide rail assembly is installed on one side of the frame and is located in the gap between the take-up roller and the guide roller. A slider is provided on the linear guide rail assembly, and a bracket is installed on the slider. One end of the bracket is rotatably connected to the extension roller. A distance sensor is provided on the top of the bracket. The rear limit sensor and the front limit sensor are respectively installed on both sides of the bottom end of the bracket. The limit stop is located in the middle of the bottom end of the bracket.

[0008] Preferably, the frame has a mounting hole, one end of the take-up roller extends through the mounting hole to the outside of the frame, and a driver is mounted on the extended end of the take-up roller.

[0009] Preferably, the two ends of the bracket are respectively abutted against the opposite surfaces of the two frames, and a hole is opened on the side of the bracket away from the extension roller, and the top end of the drive rod is installed on the bracket through the hole.

[0010] Preferably, the front limit sensor is located at the leftmost position at the bottom of the bracket, the rear limit sensor is located at the rightmost position at the bottom of the bracket, the extension roller is set towards the take-up roller, and the extension roller is located below the take-up roller.

[0011] This utility model has the following beneficial effects:

[0012] This invention utilizes an extension roller, a distance sensor, a drive assembly, a rear limit sensor, a front limit sensor, and a guide roller in conjunction. The distance sensor measures the linear distance in real time between the extension roller and the outer diameter surface of the winding paper on the take-up roller. The drive motor adjusts the horizontal linear distance between the extension roller and the outer diameter surface of the take-up paper, ensuring that the wrap angle between the extension roller and the take-up roller is fixed and the vertical distance is the same during winding. This effectively maintains constant tension on the material during winding, preventing material deformation and folding. By keeping the wrap angle fixed and the vertical distance consistent between the extension roller and the take-up roller, deformation and wrinkling of the material during winding are effectively reduced, helping to ensure that the wound material is flat and compact, improving printing quality and appearance. By adjusting the position of the extension roller, the winding effect can be optimized according to the characteristics and thickness of the material, improving the versatility and flexibility of the equipment and increasing production efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the retraction and extension mechanism;

[0014] Figure 2 This is a structural diagram of the bracket, extension roller, distance sensor, linear guide rail assembly, limit baffle, rear limit sensor and front limit sensor;

[0015] Figure 3 This is a top view of the retraction mechanism.

[0016] Figure 4 This is a schematic diagram of the internal structure of the take-up and take-down mechanism.

[0017] In the diagram: 1. Frame; 2. Support foot; 3. Take-up roller; 4. Bracket; 5. Extending roller; 6. Distance sensor; 7. Linear guide rail assembly; 8. Connecting rod; 9. Drive assembly; 901. Drive motor; 902. Connector; 903. Drive rod; 10. Limit stop; 11. Rear limit sensor; 12. Front limit sensor; 13. Guide roller. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Reference Figure 1-4 A digital printing take-up and untake-up mechanism includes a frame 1, a take-up roller 3, a bracket 4, and a guide roller 13. Two frames 1 are provided, each with support feet 2 mounted at both ends of its bottom. The take-up roller 3 and guide roller 13 are respectively installed between the two frames 1. The guide roller 13 guides the movement of the printing material during the take-up process, ensuring the material is smoothly wound onto the take-up roller 3. Mounting holes are provided on the frame 1, and one end of the take-up roller 3 extends through the mounting holes to the outside of the frame 1. A driver is mounted on the extended end of the take-up roller 3. A gap is provided between the take-up roller 3 and the guide roller 13. The guide roller 13 guides the movement of the printing material during the take-up process, ensuring the material is smoothly wound onto the take-up roller. On frame 1, a connecting rod 8 is provided on one side, and a drive assembly 9 is installed on the connecting rod 8. The drive assembly 9 includes a drive motor 901, a connector 902 is installed at one end of the drive motor 901, and a drive rod 903 is installed at the top of the connector 902. The two ends of the bracket 4 are respectively abutted on the opposite surfaces of the two frames 1. A hole is opened on the side of the bracket 4 away from the extension roller 5. The top of the drive rod 903 is installed on the bracket 4 through the hole. The drive motor 901 drives the drive rod 903 to move the bracket 4 and the extension roller 5 back and forth in the horizontal direction. The take-up roller 3 is used to take up the printed material. The driver provides power to the take-up roller 3 so that it can rotate and wind up the material.

[0020] Linear guide rail assembly 7 is installed on one side of frame 1. Linear guide rail assembly 7 is located in the gap between take-up roller 3 and guide roller 13. A slider is provided on linear guide rail assembly 7, and a bracket 4 is installed on the slider. One end of bracket 4 is rotatably connected to extension roller 5. A distance sensor 6 is provided on the top of bracket 4. According to the distance data measured by distance sensor 6, the system can automatically adjust the position of extension roller 5 to adapt to take-up under different roll diameters. When the roll diameter increases, the extension roller 5 will move outward accordingly to maintain an appropriate material expansion effect; when the roll diameter decreases, the extension roller 5 will move inward to avoid over-expansion. It is suitable for winding under different roll diameters. The bottom end of the bracket 4 is equipped with a rear limit sensor 11 and a front limit sensor 12 respectively. The limit baffle 10 is set in the middle of the bottom end of the bracket 4. The front limit sensor 12 is located at the leftmost position of the bottom end of the bracket 4. The motor is restricted to forward rotation and can only rotate in the reverse direction. The rear limit sensor 11 is located at the rightmost position of the bottom end of the bracket 4. The motor is restricted to reverse rotation and can only rotate in the forward direction. When the slider moves to the rightmost position, the rear limit sensor 11 will detect the limit baffle 10, thereby restricting the reverse rotation of the motor and making it only rotate in the forward direction. The front limit sensor 12 is located at the leftmost position of the bottom end of the bracket 4. Similarly, when the slider moves to the leftmost position, the front limit sensor 12 will detect the limit baffle 10, restricting the forward rotation of the motor and making it only rotate in the reverse direction. The extension roller 5 is set towards the winding roller 3.

[0021] When using this device, first connect an external power source to the electrical equipment. Place the device in the designated working position. Through the cooperation of the extension roller 5, distance sensor 6, drive assembly 9, rear limit sensor 11, front limit sensor 12, and guide roller 13, the distance sensor measures the straight-line distance in real time from the extension roller 5 to the outer diameter surface of the take-up paper on the take-up roller 3. By driving the motor 901, the horizontal straight-line distance between the extension roller 5 and the outer diameter surface of the take-up paper is adjusted, thereby ensuring that the wrap angle between the extension roller 5 and the take-up roller 3 is fixed and the vertical distance is the same during the winding process. This effectively maintains a constant tension on the material during winding, preventing material deformation and folding. By keeping the wrap angle between the extension roller 5 and the take-up roller 3 fixed and the vertical distance consistent, the deformation and wrinkling of the material during the winding process can be effectively reduced, helping to ensure that the wound material is flat and compact, improving printing quality and appearance. By adjusting the position of the extension roller 5, the winding effect can be optimized according to the characteristics and thickness of the material, improving the versatility and flexibility of the equipment and increasing production efficiency.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A digital printing take-up and take-down mechanism, comprising a frame (1), a take-up roller (3), a support (4), and a guide roller (13), characterized in that: There are two frames (1), and support feet (2) are installed at both ends of the bottom of the two frames (1). The take-up roller (3) and guide roller (13) are respectively installed between the two frames (1). There is a gap between the take-up roller (3) and guide roller (13). A connecting rod (8) is provided on one side of the frame (1). A drive assembly (9) is installed on the connecting rod (8). The drive assembly (9) includes a drive motor (901). A connector (902) is installed at one end of the drive motor (901). A drive rod (903) is installed at the top of the connector (902). It also includes a linear guide rail assembly (7), a limit stop (10), a rear limit sensor (11), and a front limit sensor (12). The linear guide rail assembly (7) is installed on one side of the frame (1). The linear guide rail assembly (7) is located in the gap between the take-up roller (3) and the guide roller (13). A slider is provided on the linear guide rail assembly (7), and a bracket (4) is installed on the slider. One end of the bracket (4) is rotatably connected to the extension roller (5). A distance sensor (6) is provided on the top of the bracket (4). The rear limit sensor (11) and the front limit sensor (12) are respectively installed on both sides of the bottom end of the bracket (4). The limit stop (10) is located in the middle of the bottom end of the bracket (4).

2. The digital printing take-up and take-down mechanism according to claim 1, characterized in that: The frame (1) has an installation hole, and one end of the take-up roller (3) extends through the installation hole to the outside of the frame (1). A driver is installed on the extended end of the take-up roller (3).

3. The digital printing take-up and take-down mechanism according to claim 1, characterized in that: The bracket (4) is respectively abutted on the opposite surfaces of the two frames (1). A hole is opened on the side of the bracket (4) away from the extension roller (5). The top end of the drive rod (903) is installed on the bracket (4) through the hole.

4. The digital printing take-up and take-down mechanism according to claim 3, characterized in that: The front limit sensor (12) is located at the leftmost position at the bottom of the bracket (4), and the rear limit sensor (11) is located at the rightmost position at the bottom of the bracket (4). The extension roller (5) is positioned facing the take-up roller (3) and is located below the take-up roller (3).

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