Paper feeding device of large-format image acquisition equipment

Abstract

The utility model provides a paper feeding device of large-format image acquisition equipment, which belongs to the technical field of automatic acquisition of paper document images and comprises a machine body, a guide frame mounted on the machine body, a movable frame mounted on the guide frame, a paper feeding support plate mounted on the guide frame, a power component mounted on the left side of the movable frame, and a paper feeding support plate mounted on the paper feeding support plate. The power assembly is in transmission connection with a paper separating assembly, the paper separating assembly is in transmission connection with a paper rubbing assembly, the paper separating assembly is in meshed connection with an idle gear, a one-way clutch is installed on the idle gear, and the movable frame can swing up and down along the paper separating assembly. The paper feeding device has the advantages that power is provided through the power assembly, when paper needs to be fed, power is provided through the paper separating assembly, meanwhile, the one-way clutch is in a separated state, the paper separating assembly drives the paper rubbing assembly to rotate, then the movable frame drives the whole paper feeding device to move downwards, the paper rubbing assembly is attached to paper, and the paper feeding efficiency is improved. And the paper is conveyed.

Description

Technical Field

[0001] This utility model belongs to the field of automatic image acquisition technology for paper documents, and specifically relates to a paper feeding device for a large-format image acquisition device. Background Technology

[0002] With the continuous promotion of online marking technology, automated image acquisition of small-format paper (A3 size and below) has been widely used; however, automated image acquisition of large-format exam papers (A2 and above) required by special industries such as construction exams and qualification exams still faces many challenges.

[0003] Currently, the image acquisition of these large-format interview papers mainly relies on manual operation, which suffers from low work efficiency, high labor intensity, low accuracy, and easy operational errors. Traditional paper feeding devices have many shortcomings when handling large-format exam papers. In terms of paper feeding, due to the large area and relatively heavy weight of large-format papers, ordinary paper feeding devices lack sufficient feeding power, which can easily lead to paper jams. In addition, traditional paper feeding devices are difficult to adapt to exam papers of different thicknesses and materials. Problems such as inconsistent paper feeding speeds, skewed paper feeding, and multiple sheets can occur in the paper feeding devices, resulting in overlapping and blurry scanned images. This seriously affects the accuracy of image acquisition and the quality of subsequent processing, and cannot meet the needs of large-scale, high-intensity, and high-efficiency paper processing during exams.

[0004] To address the issues of inconsistent paper feeding speeds, skewed paper feeding, and multiple sheets in existing image acquisition devices, which lead to overlapping and blurry scanned images, a new paper feeding device for large-format image acquisition equipment is needed. Utility Model Content

[0005] The purpose of this invention is to address the problems of inconsistent paper feeding speed, skewed paper feeding, and multiple sheets in the paper feeding devices of existing image acquisition equipment, which lead to overlapping and blurry scanned images. This invention proposes a paper feeding device for large-format image acquisition equipment that can ensure consistent paper feeding speed, prevent paper skew and multiple sheets, and achieve better overall performance.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows: a paper feeding device for a large-format image acquisition equipment, comprising a body, a guide frame mounted on the body, a movable frame mounted on the guide frame, a paper feeding tray mounted on the guide frame, a power assembly mounted on the left side of the movable frame, a paper separating assembly drivenly connected to the power assembly, a paper feeding assembly drivenly connected to the paper separating assembly, an interlocking wheel engaged with the paper separating assembly, a one-way clutch mounted on the interlocking wheel, and the movable frame capable of swinging up and down along the paper separating assembly. In use, power is provided by the power assembly, and when paper feeding is required, it is controlled by the paper separating assembly. Power is provided while the one-way clutch is disengaged, causing the paper separating assembly to drive the paper feeding assembly to rotate. This, in turn, causes the movable frame to move the entire paper feeding device downwards, allowing the paper feeding assembly to come into contact with the paper and feed it. After feeding is complete, the power assembly drives the paper separating assembly to rotate in the opposite direction, engaging the one-way clutch and making the roller, paper separating assembly, and movable frame a single unit. This causes the movable frame to move the entire paper feeding device upwards, allowing the paper feeding assembly to detach from the paper for repeated feeding operations. Overall, it has good performance and strong practicality.

[0007] Furthermore, the paper separating assembly includes a paper separating wheel shaft, with both ends of the paper separating wheel shaft rotatably connected to the movable frame via bearings. One end of the paper separating wheel shaft is connected to the output end of the power assembly for transmission, and the other end of the paper separating wheel shaft is fixed with a paper separating gear and a paper separating wheel pulley. At least two paper separating wheels are symmetrically arranged on both sides of the paper separating wheel pulley, and the paper separating wheels are mounted on the paper separating wheel shaft.

[0008] Furthermore, the paper feeding assembly includes a paper feeding roller shaft, with both ends of the paper feeding roller shaft rotatably connected to the movable frame via bearings. A paper feeding pulley is installed in the middle of the paper feeding roller shaft, and the paper feeding pulley is connected to the paper separating gear via a synchronous belt drive. At least two paper feeding rollers are symmetrically arranged on both sides of the paper feeding pulley.

[0009] Furthermore, a rotatable wheel shaft is rotatably mounted on the movable frame, and the rotatable wheel is fixed on the rotatable wheel shaft.

[0010] Furthermore, a paper-feeding limit sensor is installed on the movable frame.

[0011] Furthermore, a paper sensor is installed at the bottom of the paper feed tray.

[0012] As can be seen from the above technical solutions, this utility model has the following advantages:

[0013] Power is provided by a power unit. When paper feeding is required, power is provided by the paper separating component, while the one-way clutch is disengaged. This causes the paper separating component to drive the paper feeding component to rotate, which in turn causes the movable frame to move the entire paper feeding device downward, allowing the paper feeding component to come into contact with the paper and convey the paper. After conveying is completed, the power unit drives the paper separating component to rotate in the opposite direction, causing the one-way clutch to engage. This makes the roller, paper separating component, and movable frame a single unit, allowing the movable frame to move the entire paper feeding device upward, thus disengaging the paper feeding component from the paper for repeated paper feeding operations. Overall, it has good performance and strong practicality. Attached Figure Description

[0014] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0016] Figure 2 This is a side view schematic diagram of the paper-feeding lifting structure of this utility model.

[0017] Figure 3 This is a side view schematic diagram of the paper-feeding and falling structure of this utility model.

[0018] In the diagram: 1. Power unit; 2. Paper separating assembly; 3. Paper feeding assembly; 4. Paper feed tray; 5. Guide frame; 6. Paper separating wheel shaft; 7. Paper separating gear; 8. Paper separating wheel pulley; 9. Paper separating wheel; 10. Paper feeding wheel shaft; 11. Paper feeding pulley; 12. Paper feeding wheel; 13. Synchronous belt; 14. Intermediate wheel; 15. Intermediate wheel shaft; 16. One-way clutch; 17. Movable frame; 18. Paper feeding limit sensor; 19. Paper. Detailed Implementation

[0019] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0020] like Figure 1-3As shown, this embodiment proposes a paper feeding device for a large-format image acquisition device, including a body, a guide frame 5 mounted on the body, a movable frame 17 mounted on the guide frame 5, a paper feeding tray 4 mounted on the guide frame 5, a power assembly 1 mounted on the left side of the movable frame 17, a paper separating assembly 2 drivenly connected to the power assembly 1, a paper feeding assembly 3 drivenly connected to the paper separating assembly 2, an interlocking wheel 14 engaged with the paper separating assembly 2, a one-way clutch 16 mounted on the interlocking wheel 14, and the movable frame 17 being able to swing up and down along the paper separating assembly 2.

[0021] Specifically, the paper separating assembly 2 includes a paper separating wheel shaft 6, with both ends of the paper separating wheel shaft 6 rotatably connected to the movable frame 17 via bearings. One end of the paper separating wheel shaft 6 is connected to the output end of the power assembly 1 for transmission. The other end of the paper separating wheel shaft 6 is fixed with a paper separating gear 7 and a paper separating wheel pulley 8. At least two paper separating wheels 9 are symmetrically arranged on both sides of the paper separating wheel pulley 8. The paper separating wheels 9 are mounted on the paper separating wheel shaft 6. The paper feeding assembly 3 includes a paper feeding wheel shaft 10, with both ends of the paper feeding wheel shaft 10 rotatably connected to the movable frame 17 via bearings. A paper feeding pulley 11 is installed in the middle of the paper feeding wheel shaft 10. The paper feeding pulley 11 is connected to the paper separating gear 7 for transmission via a synchronous belt 13. At least two paper feeding wheels 12 are symmetrically arranged on both sides of the paper feeding pulley 11. An intermediate wheel shaft 15 is rotatably mounted on the movable frame 17. An intermediate wheel 14 is fixed on the intermediate wheel shaft 15. A paper feeding limit sensor 18 is installed on the movable frame 17. A paper sensor is installed at the bottom of the paper feed tray 4.

[0022] Working principle: First, the reverse rotation of the power component 1 drives the paper feeding device to rotate in the opposite direction around the axis of the paper separating wheel 6. At this time, the paper separating gear 7 drives the intermediate wheel 14 to rotate. At this time, the one-way clutch 16 built into the intermediate wheel 14 is in a "locked" state. The paper separating gear 7 and the intermediate wheel 14 cannot transmit rotational motion and are locked. The intermediate wheel 14, the paper separating gear 7 and the movable frame 17 are a rigid part as a whole. At this time, the movable frame 17 can only rotate around the axis of the paper separating wheel 6, driving the paper feeding wheel 12 to gradually move away from the paper feeding tray 4. When the rotation reaches the limit angle, the power component 1 stops and keeps the current position stationary. The paper feeding limit sensor 18 detects the paper.

[0023] The second step is that if there is no paper in the paper tray, the system prompts to put in paper 19 and wait. If the system senses that paper 19 has been put in and receives the paper feeding command, the power component 1 rotates in the forward direction to drive the paper separating wheel shaft 6 and the paper feeding wheel shaft 10 to rotate. At this time, the one-way clutch 16 in the intermediate wheel 14 is in the "unlocked" state and can rotate along the intermediate wheel shaft 15 under the drive of the paper separating gear 7. The paper feeding wheel 12 and the paper separating wheel 9 also rotate together. At this time, the entire paper feeding device descends along the paper separating wheel shaft 6 towards the paper feeding tray 4 under the action of gravity until the paper feeding wheel 12 contacts the paper 19 at the top of the paper feeding tray 4. Multiple paper feeding wheels 12 simultaneously rub the paper 19 at multiple points, driving the paper 19 to move forward and feed the paper 19 into the paper separating wheel 9 and enter the next processing step.

[0024] Third, when the paper 19 reaches the designated position, the power component 1 stops and immediately rotates in the opposite direction. At this time, the one-way clutch 16 in the intermediate wheel 14 is in a "locked" state, so that the paper separating gear 7 and the intermediate wheel 14 cannot achieve rotational transmission and are locked. This makes the paper feeding device only rotate in the opposite direction along the axis of the paper separating wheel 6, driving the paper feeding wheel 12 away from the paper feeding tray 4 and separating it from the top layer of paper 19 by a small distance. This releases the pressure of the paper feeding wheel 12 on the top layer of paper 19, allowing the paper separating wheel 9 to drive the paper 19 to continue moving forward and enter the next process.

[0025] Fourth step: After the previous paper completes one paper feeding action and reaches the designated position, the system issues another paper feeding command. The paper feeding device will repeat the second and third steps until all the papers 19 on the paper feeding tray 4 are successfully fed in and the image acquisition and processing is completed.

[0026] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A paper feeding device for a large-format image acquisition equipment, comprising a body, a guide frame (5) mounted on the body, and a movable frame (17) mounted on the guide frame (5), characterized in that, A paper feed tray (4) is installed on the guide frame (5). A power assembly (1) is installed on the left side of the movable frame (17). A paper separating assembly (2) is connected to the power assembly (1). A paper feeding assembly (3) is connected to the paper separating assembly (2). A mediator (14) is engaged with the paper separating assembly (2). A one-way clutch (16) is installed on the mediator (14). The movable frame (17) can swing up and down along the paper separating assembly (2).

2. The paper feeding device of the large-format image acquisition equipment according to claim 1, characterized in that, The paper separating assembly (2) includes a paper separating wheel shaft (6). Both ends of the paper separating wheel shaft (6) are rotatably connected to the movable frame (17) via bearings. One end of the paper separating wheel shaft (6) is connected to the output end of the power assembly (1). The other end of the paper separating wheel shaft (6) is fixed with a paper separating gear (7) and a paper separating wheel pulley (8). At least two paper separating wheels (9) are symmetrically arranged on both sides of the paper separating wheel pulley (8). The paper separating wheels (9) are mounted on the paper separating wheel shaft (6).

3. The paper feeding device of the large-format image acquisition equipment according to claim 2, characterized in that, The paper feeding assembly (3) includes a paper feeding wheel shaft (10), the two ends of which are rotatably connected to the movable frame (17) via bearings. A paper feeding pulley (11) is installed in the middle of the paper feeding wheel shaft (10). The paper feeding pulley (11) is connected to the paper separating gear (7) via a synchronous belt (13). At least two paper feeding wheels (12) are symmetrically arranged on both sides of the paper feeding pulley (11).

4. The paper feeding device of the large-format image acquisition equipment according to claim 1, characterized in that, The movable frame (17) is rotatably mounted with a wheel shaft (15), and the wheel (14) is fixed on the wheel shaft (15).

5. The paper feeding device of the large-format image acquisition equipment according to claim 4, characterized in that, A paper feed limit sensor (18) is installed on the movable frame (17).

6. The paper feeding device of the large-format image acquisition equipment according to claim 1, characterized in that, A paper sensor is installed at the bottom of the paper feed tray (4).

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