Offset printing machine paper feeding positioning mechanism capable of preventing paper deviation

Abstract

The utility model relates to a rubber printing machine paper feeding mechanism, especially a rubber printing machine paper feeding positioning mechanism of preventing paper offset, a rubber printing machine paper feeding positioning mechanism of preventing paper offset, including support, motor, support plate, runner, conveyer belt, carrier plate and return spring, support right side rear part fixedly connected with motor, support right part front side fixedly connected with support plate, support plate middle part and support left part all rotationally connected with runner, the output shaft of motor front side and right side runner rear end fixed connection, be equipped with conveyer belt between two runners, support left side sliding connection has carrier plate, and return spring is connected between carrier plate and support. The utility model discloses through longitudinal pressing plate and horizontal pressing plate cooperation limiting effect, constraint to its left and right and up and down direction in the paper conveying process, prevent the paper offset caused by air current disturbance or mechanical vibration, ensure that the printing graph text position is accurate and correct, and the finished product quality is improved significantly.

Description

Technical Field

[0001] This utility model relates to the paper feeding mechanism of an offset printing machine, and more particularly to a paper feeding positioning mechanism for an offset printing machine that prevents paper deviation. Background Technology

[0002] With the continuous development of the printing industry, offset printing presses, as an important component of modern printing equipment, are widely used in various printing fields such as books, newspapers, packaging, and labels. Among these, the paper feeding and positioning mechanism is one of the key components of an offset printing press. Its function is to accurately and stably transport the paper to be printed to the printing station, ensuring precise paper positioning during the printing process, thereby guaranteeing the consistency and clarity of print quality. Currently, most offset printing presses use a combination of mechanical guides or pneumatic suction nozzles for paper positioning. However, due to their relatively simple structural design and lack of effective guiding and correction mechanisms, paper tilting, sliding, and misalignment are prone to occur at high speeds, leading to deviations in the position of printed images and affecting the quality of the finished product. Furthermore, existing paper feeding mechanisms are mostly fixed or semi-adjustable structures, with limited adaptability to different paper sizes, thicknesses, or materials. Changing paper types often requires stopping the machine to adjust multiple components, which is cumbersome, inefficient, and fails to meet the production needs of modern printing companies for multi-variety, small-batch, and rapid changeover.

[0003] Therefore, it is necessary to design a paper feeding and positioning mechanism for offset printing machines that prevents paper misalignment in order to solve the above problems. Utility Model Content

[0004] To overcome the drawbacks of easy paper deviation and difficulty in adapting to different paper sizes, this utility model provides a paper feeding and positioning mechanism for offset printing machines that prevents paper deviation.

[0005] Technical Solution: A paper feeding and positioning mechanism for an offset printing machine to prevent paper deviation includes a support, a motor, a support plate, a roller, a conveyor belt, a carrying plate, a return spring, a rotating bracket, fixing bolts, a first electric slide rail assembly, a second electric slide rail assembly, and a paper-feeding air duct. A motor is fixedly connected to the rear right side of the support, and a support plate is fixedly connected to the front right side of the support. Rollers are rotatably connected to the middle of the support plate and the left side of the support. The output shaft at the front of the motor is fixedly connected to the rear end of the right-side roller. A conveyor belt is provided between the two rollers. A carrying plate is slidably connected to the left side of the support, and a return spring connects the carrying plate to the support. A rotating bracket is rotatably connected to the left side of the support, and a fixing bolt is threadedly connected between the rotating bracket and the support. A first electric slide rail assembly is fixedly connected to the bottom of the rotating bracket, and a second electric slide rail assembly is slidably connected to the first electric slide rail assembly. A paper-feeding air duct is fixedly connected to the right side of the second electric slide rail assembly.

[0006] As an improvement to the above scheme, it also includes longitudinal pressure plates and adjusting bolts. The longitudinal pressure plates are slidably placed on both the front and rear sides of the top of the support, and adjusting bolts are threadedly connected to both the front and rear sides of the support. The adjusting bolts on the same side are threadedly connected to the longitudinal pressure plates on the same side.

[0007] As an improvement to the above scheme, a transverse pressure plate is also included, with the transverse pressure plate fixedly connected to the middle of the two longitudinal pressure plates near the center end.

[0008] As an improvement to the above solution, it also includes connecting rods and lifting plates. Connecting rods are fixedly connected to the left side of both longitudinal pressure plates, and lifting plates are slidably connected to the two connecting rods near the center end. The lifting plates are in sliding contact with the load plate.

[0009] As an improvement to the above scheme, it also includes a pressure roller, a rotating wheel and a belt. The pressure roller is rotatably connected to the right side of the support plate, and the rotating wheel is fixedly connected to the front side of both the rotating wheel and the pressure roller. A belt is provided between the two rotating wheels.

[0010] As an improvement to the above solution, a fixing plate is also included. A fixing plate is fixedly connected to the right side of the motor, and the fixing plate is located at the bottom of the pressure roller.

[0011] Beneficial effects: 1. This utility model uses the combined limiting effect of longitudinal and transverse pressure plates to constrain the paper in the left and right and up and down directions during the paper feeding process, preventing the paper from shifting due to airflow disturbance or mechanical vibration, ensuring the accurate position of printed graphics and text, and significantly improving the quality of finished products.

[0012] 2. This utility model controls the position of the paper feeding air duct by linking the first electric slide rail assembly and the second electric slide rail assembly. It can automatically adjust the blowing point, accurately separate the top layer of paper, avoid multiple sheets of paper from entering the conveyor belt at the same time, and improve the stability and automation of paper feeding.

[0013] 3. This utility model uses a rotating bracket fixed with fixing bolts to support 90-degree rotation adjustment, which improves the equipment's adaptability to the site layout and makes it easier for operators to flexibly arrange the work process.

[0014] 4. This utility model, through the cooperation of the carrier plate and the return spring, can automatically adjust the height according to the change of paper thickness, so that the top layer of paper is always kept at a fixed working height, without the need for frequent manual adjustment, thus improving the smoothness and reliability of continuous paper feeding. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a three-dimensional structural diagram of the motor, wheel, and conveyor belt of this utility model.

[0017] Figure 3 This is a three-dimensional sectional view of the support, loading plate, and return spring of this utility model.

[0018] Figure 4 This is a three-dimensional structural diagram of the rotating bracket, fixing bolts, and first electric slide rail assembly of this utility model.

[0019] Figure 5 This is a three-dimensional structural diagram of the longitudinal pressure plate, adjusting bolts, and transverse pressure plate components of this utility model.

[0020] Figure 6 This is a three-dimensional structural diagram of the rotating wheel, belt, and pressure roller components of this utility model.

[0021] Labels in the diagram: 1-Support, 2-Motor, 3-Roller, 4-Conveyor belt, 50-Carrying plate, 51-Return spring, 60-Rotating bracket, 61-Fixing bolt, 62-First electric slide rail assembly, 63-Second electric slide rail assembly, 64-Paper feeding duct, 70-Longitudinal pressure plate, 71-Adjusting bolt, 72-Transverse pressure plate, 73-Connecting rod, 74-Lifting plate, 80-Fixing plate, 81-Support plate, 82-Rotating wheel, 83-Belt, 84-Pressure roller. Detailed Implementation

[0022] Example: A paper feeding and positioning mechanism for an offset printing press to prevent paper misalignment, such as... Figures 1-6 As shown, the assembly includes a support 1, a motor 2, a support plate 81, a rotating wheel 3, a conveyor belt 4, a carrying plate 50, a return spring 51, a rotating bracket 60, fixing bolts 61, a first electric slide rail assembly 62, a second electric slide rail assembly 63, and a paper-feeding air duct 64. The motor 2 is bolted to the rear right side of the support 1, and the support plate 81 is bolted to the front right side of the support 1. Rotating wheels 3 are rotatably connected to both the middle of the support plate 81 and the left side of the support 1. The output shaft at the front of the motor 2 is fixedly connected to the rear end of the rotating wheel 3 on the right side. A conveyor belt 4 is provided between the rotating wheels 3. A carrying plate 50 is slidably connected to the left side of the support 1. A return spring 51 is connected between the carrying plate 50 and the support 1. A rotating bracket 60 is rotatably connected to the left side of the support 1. A fixing bolt 61 is threadedly connected between the rotating bracket 60 and the support 1. A first electric slide rail assembly 62 is fixedly connected to the bottom of the rotating bracket 60 by bolts. A second electric slide rail assembly 63 is slidably connected to the first electric slide rail assembly 62. A paper-feeding air duct 64 is fixedly connected to the right side of the second electric slide rail assembly 63 by bolts.

[0023] like Figure 1 and Figure 5As shown, it also includes a longitudinal pressure plate 70 and an adjusting bolt 71. The longitudinal pressure plate 70 is slidably placed on both the front and rear sides of the top of the support 1. The adjusting bolt 71 is threadedly connected to both the front and rear sides of the support 1. The adjusting bolt 71 on the same side is threadedly connected to the longitudinal pressure plate 70 on the same side.

[0024] like Figure 5 As shown, it also includes a transverse pressure plate 72, and the transverse pressure plate 72 is fixedly connected to the middle of the two longitudinal pressure plates 70 near the center end.

[0025] like Figure 5 As shown, it also includes a connecting rod 73 and a lifting plate 74. The two longitudinal pressure plates 70 are fixedly connected to the left side of the connecting rod 73, and the two connecting rods 73 are slidably connected to the lifting plate 74 near the center end. The lifting plate 74 is in slidable contact with the load plate 50.

[0026] like Figure 6 As shown, it also includes a pressure roller 84, a rotating wheel 82 and a belt 83. The pressure roller 84 is rotatably connected to the right side of the support plate 81. The rotating wheel 82 is fixedly connected to the front side of the rotating wheel 3 and the front side of the pressure roller 84. A belt 83 is provided between the two rotating wheels 82.

[0027] like Figure 1 and Figure 6 As shown, it also includes a fixing plate 80, which is fixedly connected to the right side of the motor 2. The fixing plate 80 is located at the bottom of the pressure roller 84.

[0028] When this device is needed for precise paper feeding and to prevent deviation, first loosen the fixing bolt 61, then rotate the rotating bracket 60 90 degrees counterclockwise to place the paper stack on the carrier plate 50. The carrier plate 50 automatically descends under the action of the return spring 51, keeping the top layer of paper at a fixed working height. Then rotate the rotating bracket 60 90 degrees clockwise to reset it, and then fix the position of the rotating bracket 60 with the reset fixing bolt 61 to ensure that the paper feeding duct 64 is aligned with the paper stack. Start the motor 2. The output shaft of the motor 2 drives the right rotating wheel 3 to rotate, which drives the pressure roller 84 to rotate synchronously with the left rotating wheel 3 through the belt 83 and the conveyor belt 4. The conveyor belt 4 starts to circulate. Start the first electric slide rail assembly 62 to drive the second electric slide rail assembly 63 to move to the left towards the paper. Then start the second electric slide rail assembly 63 and the paper feeding duct 64. The second electric slide rail assembly 63 drives the second electric slide rail assembly 63 to move to the left towards the paper stack. The paper-feeding duct 64 moves downwards to approach the paper, adsorbing the top layer of paper. The second electric slide rail assembly 63 then drives the paper-feeding duct 64 upwards, lifting the paper. The paper is then conveyed forward by the first electric slide rail assembly 62, and airflow is blown out through the duct to separate it from the paper. The paper moves to the right pressure roller 84 via the conveyor belt 4. During this process, the longitudinal pressure plate 70 prevents the paper from shifting during transport, and the transverse pressure plate 72 is located on top of the paper to prevent it from floating. The operator can also control the longitudinal pressure plate 70 to slide back and forth along the top of the support 1 by turning the adjusting bolt 71. The connecting rod 73 and the lifting plate 74 move synchronously to adapt to different paper sizes. The paper is conveyed to the printing area via the pressure roller 84 and the fixed plate 80, completing precise positioning. The above operation is repeated. After the paper is fed, the motor 2, the first electric slide rail assembly 62, the second electric slide rail assembly 63, and the paper-feeding duct 64 are turned off.

Claims

1. A paper feeding and positioning mechanism for an offset printing machine that prevents paper deviation, characterized in that: The components include a support (1), a motor (2), a support plate (81), a wheel (3), a conveyor belt (4), a load plate (50), a return spring (51), a rotating bracket (60), a fixing bolt (61), a first electric slide rail assembly (62), a second electric slide rail assembly (63), and a paper-feeding air duct (64). The motor (2) is fixedly connected to the rear right side of the support (1), and the support plate (81) is fixedly connected to the front right side of the support (1). Wheels (3) are rotatably connected to the middle of the support plate (81) and the left side of the support (1). The output shaft of the motor (2) is fixedly connected to the rear end of the wheel (3) on the right side. A conveyor belt (4) is provided between the two rotating wheels (3). A load plate (50) is slidably connected to the left side of the support (1). A return spring (51) is connected between the load plate (50) and the support (1). A rotating bracket (60) is rotatably connected to the left side of the support (1). A fixing bolt (61) is threaded between the rotating bracket (60) and the support (1). A first electric slide rail assembly (62) is fixedly connected to the bottom of the rotating bracket (60). A second electric slide rail assembly (63) is slidably connected to the first electric slide rail assembly (62). A paper-feeding air duct (64) is fixedly connected to the right side of the second electric slide rail assembly (63).

2. The offset printing press paper feeding and positioning mechanism for preventing paper deviation as described in claim 1, characterized in that: It also includes a longitudinal pressure plate (70) and an adjusting bolt (71). The longitudinal pressure plate (70) is slidably placed on both the front and rear sides of the top of the support (1). The adjusting bolt (71) is threadedly connected to both the front and rear sides of the support (1). The adjusting bolt (71) on the same side is threadedly connected to the longitudinal pressure plate (70) on the same side.

3. The offset printing press paper feeding and positioning mechanism for preventing paper deviation as described in claim 2, characterized in that: It also includes a transverse pressure plate (72), and the two longitudinal pressure plates (70) are fixedly connected to the transverse pressure plate (72) near the center end.

4. The offset printing press paper feeding and positioning mechanism for preventing paper deviation as described in claim 3, characterized in that: It also includes a connecting rod (73) and a lifting plate (74). The two longitudinal pressure plates (70) are fixedly connected to the left side of the connecting rod (73). The two connecting rods (73) are slidably connected to the lifting plate (74) near the center end. The lifting plate (74) is in sliding contact with the load plate (50).

5. The offset printing press paper feeding and positioning mechanism for preventing paper deviation as described in claim 4, characterized in that: It also includes a pressure roller (84), a rotating wheel (82) and a belt (83). The pressure roller (84) is rotatably connected to the right side of the support plate (81). The rotating wheel (82) is fixedly connected to the front side of the rotating wheel (3) and the front side of the pressure roller (84). A belt (83) is provided between the two rotating wheels (82).

6. The offset printing press paper feeding and positioning mechanism for preventing paper deviation as described in claim 5, characterized in that: It also includes a fixing plate (80), which is fixedly connected to the right side of the motor (2). The fixing plate (80) is located at the bottom of the pressure roller (84).

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