Automatic deviation correcting device for paper feeding mechanism of offset printing machine

Abstract

The utility model discloses a rubber -type press paper feed mechanism automatic deviation rectifying device, it includes support, and the lower surface fixed connection of support has the locating frame board, and the side surface fixed connection of locating frame board has motor three, and the output fixed connection of motor three has the conveyance gyro wheel, and the side surface fixed connection of conveyance gyro wheel has the connecting shaft, and the side surface transmission connection of connecting shaft has the belt, and the lower surface fixed connection of support has the photoelectric sensor, and the lower surface fixed connection of support has the support frame board no.

Description

Technical Field

[0001] This utility model relates to the field of paper feeding mechanism correction technology, and in particular to an automatic correction device for the paper feeding mechanism of an offset printing machine. Background Technology

[0002] In offset printing presses, the stability and accuracy of the paper feeding mechanism directly affect printing quality. Existing paper feeding mechanisms typically rely on conveyor belts for paper transport. However, due to factors such as vibrations during conveyor belt operation and the unevenness of the paper itself, paper is prone to deviation during transport. Traditional paper feeding methods rely solely on the friction of the conveyor belt to propel the paper forward, lacking effective auxiliary support and making it difficult to ensure smooth paper transport along the predetermined path, resulting in frequent deviations. Furthermore, existing correction devices often employ a single correction structure, leading to low accuracy in correction when paper deviation occurs and failing to ensure complete paper return to the correct position. In addition, while some complex correction devices possess certain correction functions, their numerous structural components not only increase manufacturing costs but also significantly raise the failure rate. If any component malfunctions during operation, it severely impacts the normal operation of the correction process, causing equipment downtime for maintenance and reducing production efficiency. Utility Model Content

[0003] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide an automatic correction device for the paper feeding mechanism of an offset printing machine. This device uses multiple sets of conveyor rollers connected by a belt above the center line of the conveyor belt to assist the conveyor belt in feeding paper from above, reducing paper deviation. A set of correction rollers is provided on the left or right side of each of the two sets of conveyor rollers distributed front and rear. When a photoelectric sensor detects paper deviation, the speed difference between the correction rollers and the conveyor rollers is used to cause the paper to rotate around the contact point of the conveyor rollers as the center of rotation under the action of the correction rollers, thus correcting the paper. The paper is then corrected a second time by the two sets of correction rollers performing sequential correction on the left and right sides, improving the accuracy of the correction. Furthermore, the structure is simple, avoiding the increased failure rate and impact on the correction process caused by complex structures with too many components.

[0004] This utility model also provides an automatic correction device for the paper feeding mechanism of the offset printing machine, comprising: a fixed frame, a rotating shaft rotatably connected to the inner side wall of the fixed frame, a conveyor belt drivingly connected to the side surface of the rotating shaft, a bracket fixedly connected to the upper surface of the fixed frame, a positioning frame plate fixedly connected to the lower surface of the bracket, a motor three fixedly connected to the side surface of the positioning frame plate, a conveyor roller fixedly connected to the output end of the motor three, a connecting shaft fixedly connected to the side surface of the conveyor roller, and a belt drivingly connected to the side surface of the connecting shaft;

[0005] A photoelectric sensor is fixedly connected to the lower surface of the bracket. A support plate is fixedly connected to the lower surface of the bracket. A motor is fixedly connected to the side surface of the support plate. A straightening roller is fixedly connected to the output end of the motor. A fourth motor is fixedly connected to the side surface of the support plate. A straightening roller is fixedly connected to the output end of the fourth motor. Using these components, the paper can be conveyed from the center using a conveyor roller. The straightening rollers, through their speed difference with the conveyor roller, allow any misaligned paper to rotate along the conveyor roller and return to its correct position.

[0006] According to the automatic correction device for the paper feeding mechanism of the offset printing machine described in this utility model, the side surface of the first correction roller is rotatably connected to the first support plate, and the side surface of the second correction roller is rotatably connected to the second support plate. This allows the first and second correction rollers to be fixed on the first and second support plates respectively and to rotate along the plates.

[0007] According to the automatic correction device for the paper feeding mechanism of the offset printing machine described in this utility model, the first correction roller and the second correction roller are symmetrically distributed, and the center point of the support is located between the first correction roller and the second correction roller. By positioning the first correction roller and the second correction roller on both sides of the support and distributing them front and back, secondary correction of the paper can be performed.

[0008] According to the automatic correction device for the paper feeding mechanism of the offset printing machine described in this utility model, a motor is fixedly connected to the side surface of the fixed frame, and the output end of the motor is fixedly connected to the rotating shaft. The motor drives the rotating shaft to rotate, thereby driving the conveyor belt to transport the paper.

[0009] According to the automatic correction device for the paper feeding mechanism of the offset printing machine described in this utility model, there are multiple conveying rollers that are equidistantly distributed, and the conveying rollers are located between the first correction roller and the second correction roller. Multiple sets of conveying rollers are used to transport the paper from above.

[0010] According to the automatic correction device for the paper feeding mechanism of the offset printing machine described in this utility model, there are multiple sets of photoelectric sensors, with two sensors in each set, and the conveying roller is located between two photoelectric sensors. The photoelectric sensors can be used to detect whether the paper has shifted.

[0011] According to the automatic deviation correction device for the paper feeding mechanism of the offset printing machine described in this utility model, a positioning plate is fixedly connected to the lower surface of the bracket. There are two positioning plates symmetrically distributed, and the conveying roller is located between the two positioning plates. The positioning plates provide auxiliary positioning for the paper from above, preventing the sides of the paper from curling up and affecting the deviation correction process.

[0012] According to the automatic deviation correction device for the paper feeding mechanism of the offset printing machine described in this utility model, a support plate is fixedly connected to the inner side of the fixed frame, and the upper surface of the support plate is in contact with the conveyor belt. The support plate provides support for the conveyor belt.

[0013] Beneficial effects:

[0014] This portable conical hole grinding machine utilizes multiple sets of conveyor rollers connected by a belt above the center line of the conveyor belt to assist the conveyor belt in transporting paper from above, reducing paper deviation. A set of correcting rollers is located on the left or right side of each of the two sets of conveyor rollers distributed front and rear. When a photoelectric sensor detects paper deviation, the speed difference between the correcting rollers and the conveyor rollers causes the paper to rotate around the contact point of the conveyor rollers under the action of the correcting rollers, thus straightening the paper. The paper undergoes secondary correction through the sequential correction of the two sets of correcting rollers on the left and right sides, improving the accuracy of the correction. Furthermore, its simple structure avoids the increased failure rate and impact on the correction process caused by complex structures with too many components. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0016] Figure 1 This is a right-side overall structural view of the automatic correction device for the paper feeding mechanism of an offset printing machine according to this utility model;

[0017] Figure 2 This is a left-side view of the overall structure of the automatic correction device for the paper feeding mechanism of an offset printing machine according to this utility model;

[0018] Figure 3 This is a structural diagram of the conveyor rollers and belt of the automatic correction device for the paper feeding mechanism of an offset printing machine according to this utility model;

[0019] Figure 4 This is a cross-sectional view of the fixing frame of the automatic correction device for the paper feeding mechanism of the offset printing machine according to this utility model.

[0020] Legend:

[0021] 1. Fixed frame; 2. Motor 1; 3. Bracket; 4. Support plate 1; 5. Motor 2; 6. Straightening roller 1; 7. Positioning plate; 8. Positioning plate; 9. Conveyor roller; 10. Motor 3; 11. Photoelectric sensor; 12. Conveyor belt; 13. Belt; 14. Support plate 2; 15. Motor 4; 16. Straightening roller 2; 17. Connecting shaft; 18. Support plate; 19. Rotating shaft. Detailed Implementation

[0022] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0023] Reference Figure 1-4 The present invention relates to an automatic correction device for the paper feeding mechanism of an offset printing machine, comprising: a fixed frame 1, a rotating shaft 19 rotatably connected to the inner side wall of the fixed frame 1, a motor 2 fixedly connected to the side surface of the fixed frame 1, the output end of the motor 2 fixedly connected to the rotating shaft 19, a conveyor belt 12 connected to the side surface of the rotating shaft 19, a bracket 3 fixedly connected to the upper surface of the fixed frame 1, a positioning plate 8 fixedly connected to the lower surface of the bracket 3, a motor 10 fixedly connected to the side surface of the positioning plate 8, a conveyor roller 9 fixedly connected to the output end of the motor 10, multiple conveyor rollers 9 being equally spaced, the conveyor rollers 9 being located between the first correction roller 6 and the second correction roller 16, a connecting shaft 17 fixedly connected to the side surface of the conveyor roller 9, and a belt 13 connected to the side surface of the connecting shaft 17.

[0024] Specifically, a rotating shaft 19 driven by a motor 2 is set between the fixed frames 1, and the rotating shaft 19 drives the conveyor belt 12 to move, so that the conveyor belt 12 can transport the paper placed on the surface. Multiple sets of conveyor rollers 9 are set above the center line of the conveyor belt 12 and fixed to the bracket 3 by the positioning frame plate 8. Each conveyor roller 9 is equipped with a connecting shaft 17, and the connecting shafts 17 are connected by a belt 13, so that all the conveyor rollers 9 can rotate synchronously at the same speed. The motor 3 10 is used as a power source to enable the conveyor rollers 9 to move at the same speed as the conveyor belt 12 to transport the paper, reducing the possibility of deviation during the paper transport process.

[0025] A photoelectric sensor 11 is fixedly connected to the lower surface of the bracket 3. There are multiple sets of photoelectric sensors 11, with two in each set. The conveying roller 9 is located between two photoelectric sensors 11. A support plate 1 4 is fixedly connected to the lower surface of the bracket 3. A motor 2 5 is fixedly connected to the side surface of the support plate 1 4. A straightening roller 1 6 is fixedly connected to the output end of the motor 2 5. The side surface of the straightening roller 1 6 is rotatably connected to the support plate 1 4. A support plate 2 14 is fixedly connected to the lower surface of the bracket 3. A motor 4 15 is fixedly connected to the side surface of the support plate 2 14. A straightening roller 2 16 is fixedly connected to the output end of the motor 4 15. The side surface of the straightening roller 2 16 is rotatably connected to the support plate 2 14. The straightening roller 1 6 and the straightening roller 2 16 are symmetrically distributed at the center. The center point of the bracket 3 is located between the straightening roller 1 6 and the straightening roller 2 16.

[0026] Specifically, a set of support plates 1 and 2 are respectively provided below the support frame 3. Correcting rollers 1 and 2 are also installed on support plates 1 and 2, respectively, powered by motors 2 and 4. The correcting rollers 1 and 2 are located on the left and right sides of the center line of the support 3, respectively, and are distributed front and back. They are also on the same horizontal line as the conveyor rollers 9 located in the middle, adjacent to the conveyor rollers 9 on both sides. The support 3 is also equipped with multiple sets of photoelectric sensors 11, two in each set, located on both sides of the conveyor rollers 9. The correcting rollers 1 and 2 are located between two adjacent sets of photoelectric sensors 11. When the paper is not shifted, the correcting rollers 1 and 2 are positioned correctly. The rotational speed of the first roller 16 is the same as that of the conveyor roller 9, assisting the conveyor roller 9 in transporting paper. When a set of photoelectric sensors 11 located in front of the first roller 16 detects that the paper has deviated, the deviation signal is transmitted to the external controller through the wire. The external controller then transmits the signal to the second motor 5 to change the rotational speed of the first roller 16. When the paper reaches the first roller 16 and the conveyor roller 9 which are on the same horizontal line, the speed difference between the first roller 16 and the conveyor roller 9 causes the paper to rotate around the contact point with the conveyor roller 9 under the action of the first roller 16, thereby straightening the paper. If the paper has not been straightened after passing the next set of photoelectric sensors 11, the above steps are repeated to correct the deviation again through the second straightening roller 16.

[0027] A positioning plate 7 is fixedly connected to the lower surface of the bracket 3. There are two positioning plates 7, which are symmetrically distributed. The conveyor roller 9 is located between the two positioning plates 7. A support plate 18 is fixedly connected to the inner side of the fixed frame 1. The upper surface of the support plate 18 is in contact with the conveyor belt 12.

[0028] Specifically, two sets of positioning plates 7 are provided below the bracket 3 and are located on both sides of the conveyor roller 9. They are used to position the paper from above, so that the paper is kept as horizontal as possible during transportation to avoid curling edges, which would affect the correction process. A support plate 18 is also provided between the fixed frames 1 for support, so that the upper part of the support plate 18 is in close contact with the conveyor belt 12, providing support for the conveyor belt 12 and facilitating stable transportation and correction of the paper.

[0029] Working principle: The paper used in the offset printing machine is placed on the conveyor belt 12 and transported together with the conveyor roller 9. When the paper is not deviated, the rotation speed of the second correction roller 16 and the first correction roller 6 is the same as that of the conveyor roller 9, assisting the conveyor roller 9 in transporting the paper. When a set of photoelectric sensors 11 located in front of the first correction roller 6 detects that the paper has deviated, the deviation signal is transmitted to the external controller through the wire. The external controller then transmits the signal to the second motor 5 to change the rotation speed of the first correction roller 6. When the paper reaches the first correction roller 6 and the conveyor roller 9 which are on the same horizontal line, the speed difference between the first correction roller 6 and the conveyor roller 9 causes the paper to rotate around the contact point with the conveyor roller 9 under the action of the first correction roller 6, thereby straightening the paper. If the paper has not been straightened after passing the next set of photoelectric sensors 11, the above steps are repeated and the paper is corrected again by the second correction roller 16.

[0030] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An automatic correction device for the paper feeding mechanism of an offset printing machine, characterized in that, include: A fixed frame (1) is rotatably connected to the inner side wall of the fixed frame (1), and a conveyor belt (12) is driven to the side surface of the rotating shaft (19). A bracket (3) is fixedly connected to the upper surface of the fixed frame (1), and a positioning frame plate (8) is fixedly connected to the lower surface of the bracket (3). A motor (10) is fixedly connected to the side surface of the positioning frame plate (8). A conveyor roller (9) is fixedly connected to the output end of the motor (10). A connecting shaft (17) is fixedly connected to the side surface of the conveyor roller (9), and a belt (13) is driven to the side surface of the connecting shaft (17). A photoelectric sensor (11) is fixedly connected to the lower surface of the bracket (3). A support plate (4) is fixedly connected to the lower surface of the bracket (3). A motor (5) is fixedly connected to the side surface of the support plate (4). A correction roller (6) is fixedly connected to the output end of the motor (5). A support plate (14) is fixedly connected to the lower surface of the bracket (3). A motor (15) is fixedly connected to the side surface of the support plate (14). A correction roller (16) is fixedly connected to the output end of the motor (15).

2. The automatic correction device for the paper feeding mechanism of an offset printing machine according to claim 1, characterized in that, The side surface of the first straightening roller (6) is rotatably connected to the first support plate (4), and the side surface of the second straightening roller (16) is rotatably connected to the second support plate (14).

3. The automatic correction device for the paper feeding mechanism of an offset printing machine according to claim 1, characterized in that, The first correction roller (6) and the second correction roller (16) are symmetrically distributed at the center, and the center point of the bracket (3) is located between the first correction roller (6) and the second correction roller (16).

4. The automatic correction device for the paper feeding mechanism of an offset printing machine according to claim 1, characterized in that, The side surface of the fixed frame (1) is fixedly connected to a motor (2), and the output end of the motor (2) is fixedly connected to the rotating shaft (19).

5. The automatic correction device for the paper feeding mechanism of an offset printing machine according to claim 1, characterized in that, The conveying rollers (9) are multiple and equidistantly distributed, and the conveying rollers (9) are located between the first straightening roller (6) and the second straightening roller (16).

6. The automatic correction device for the paper feeding mechanism of an offset printing machine according to claim 1, characterized in that, The photoelectric sensors (11) are in multiple sets, with two in each set, and the conveying roller (9) is located between the two photoelectric sensors (11).

7. The automatic correction device for the paper feeding mechanism of an offset printing machine according to claim 1, characterized in that, The lower surface of the bracket (3) is fixedly connected to a positioning plate (7). There are two positioning plates (7) and they are symmetrically distributed. The conveying roller (9) is located between the two positioning plates (7).

8. The automatic correction device for the paper feeding mechanism of an offset printing machine according to claim 1, characterized in that, The inner side of the fixed frame (1) is fixedly connected to a support plate (18), and the upper surface of the support plate (18) is in contact with the conveyor belt (12).

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