A paper conveying device

Abstract

This utility model relates to a paper conveying device, including a feeding platform with a feeding plane parallel to the horizontal plane; a paper separating unit with a suction cup and a first air nozzle, the suction plane of the suction cup being parallel to the feeding plane; the first air nozzle being disposed beside the suction cup and blowing air onto the paper to be printed adsorbed by the suction cup to separate the adhered paper; and a feeding unit with a conveying surface for transporting the paper to be printed along the paper conveying direction. The paper conveying device of this utility model, by providing a first air nozzle beside the suction cup to blow air onto the paper to be printed, separates adhered paper, ensuring that the suction cup adsorbs only one sheet of paper at a time, thereby reducing the generation of printing defects.

Description

Technical Field

[0001] This utility model relates to the field of printing press technology, and in particular to a paper conveying device. Background Technology

[0002] A printing press is a machine that prints text and / or images onto a substrate, typically paper. A printing press consists of a paper conveying device and a printing device. The paper conveying device delivers paper to the printing device according to a specific pattern, and the printing device prints the text and / or images onto the paper. Therefore, the efficiency and print quality of a printing press are directly related to the performance of the paper conveying device. A typical paper conveying device includes a stacking platform, suction cups, and a conveyor belt. During operation, the suction cups pick up paper from the stacking platform and move it onto the conveyor belt, which then transports the paper to the printing device. However, it has been found that during printing, a certain number of unprinted or incompletely printed defective products occur, requiring manual sorting and affecting the printing press's production efficiency. Utility Model Content

[0003] Therefore, the purpose of this utility model is to provide a paper conveying device.

[0004] A paper conveying device includes: a feeding platform with a feeding plane parallel to a horizontal plane for stacking paper to be printed; a paper separating unit located above the feeding plane, including a suction cup and a first air nozzle; the suction plane of the suction cup is parallel to the feeding plane and is used to suction the paper to be printed; the first air nozzle is located beside the suction cup and blows air onto the paper to be printed suctioned by the suction cup to separate the adhered paper to be printed; and a feeding unit located beside the feeding platform, having a conveying surface for transporting the paper to be printed along the paper conveying direction.

[0005] The paper conveying device of this utility model uses a suction cup to adsorb the paper to be printed, and a first air nozzle is provided on one side of the suction cup. The first air nozzle blows air onto the paper adsorbed by the suction cup, so that two or more sheets of paper that may stick together are separated. This allows the suction cup to adsorb and transfer only one sheet of paper to the conveyor belt at a time, thereby ensuring that the printing device prints one sheet of paper at a time, so as to reduce the production of defective products that are not printed or are incompletely printed.

[0006] Furthermore, in the vertical direction, the first air nozzle is lower than the suction cup; in the horizontal direction, the first air nozzle is separated from the paper to be printed piled on the feeding plane by a certain distance; the air jet direction of the first air nozzle is parallel to the suction plane.

[0007] With the above technical solution, when the suction cup adsorbs the paper to be printed and lifts it upward, there will be a gap between the two papers to be printed that are stuck together. At this time, the first air nozzle sprays air from the side of the paper to be printed, and the gas enters between the two papers to be printed that are stuck together from the gap, forcing the two papers to be printed to separate.

[0008] Furthermore, the height difference between the first jet nozzle and the suction cup is 10-15mm; along the jet direction of the first jet nozzle, the distance from the first jet nozzle to the paper to be printed stacked on the feeding plane is 20-30mm.

[0009] With the above technical solution, at this distance, the first air nozzle can provide enough air force to separate the two stuck sheets of paper to be printed, without blowing the paper away due to excessive air force.

[0010] Furthermore, in the vertical direction, the first jet nozzle is higher than the suction cup, and the angle between the jet direction of the first jet nozzle and the adsorption plane is greater than 45° and less than 90°.

[0011] Through the above technical solution, the first air nozzle causes the paper to be printed, which is adsorbed by the suction cup, to vibrate regularly, thereby separating the two pieces of paper that may stick together.

[0012] Furthermore, the first jet nozzle is a fan-shaped nozzle.

[0013] Through the above technical solution, the air outlet of the first jet nozzle has a large coverage area and a certain impact force, effectively forcing the two sticky sheets of paper to be printed to separate.

[0014] Furthermore, the paper separating unit also includes a second air nozzle, which is disposed on one side of the feeding platform and is separated from the paper to be printed stacked on the feeding plane by a certain distance in the horizontal direction; the air jet direction of the second air nozzle is parallel to the feeding plane; the second air nozzle is connected to the plasma blower.

[0015] Through the above technical solution, the second jet nozzle blows a flow of positive and negative electrons onto the paper to be printed, effectively neutralizing the static electricity on the paper surface and further preventing the paper from sticking together.

[0016] Furthermore, the paper separating unit also includes a horizontal guide rail, a slider, and a mounting base; the horizontal guide rail is disposed above the feeding plate and extends along the paper conveying direction; the slider is slidably disposed on the horizontal guide rail; one end of the mounting base is connected to the slider, and the other end extends vertically toward the feeding plate; the mounting base is capable of vertically extending and retracting; the suction cup is disposed at one end of the mounting base near the feeding plate.

[0017] Through the above technical solution, the mounting base drives the suction cup to approach the feeding plate and adsorb the paper to be printed. Then the slider moves on the horizontal guide rail and transports the paper to be printed to the transport unit.

[0018] Furthermore, the number of suction cups is several, and the several suction cups are arranged at intervals along a straight line parallel to the feeding plane.

[0019] The above technical solution allows multiple suction cups to ensure a more secure adhesion of the paper to be printed.

[0020] Furthermore, the feeding unit includes a conveyor table, a conveyor belt, and two paper feeding rollers; the conveyor table is located next to the paper separating unit, and the conveyor belt is laid on the conveyor table to form an upward conveying surface and transport the paper to be printed along the paper conveying direction; the two paper feeding rollers are located on the side of the conveyor belt near the paper separating unit; in the vertical direction, the two paper feeding rollers are symmetrically arranged with respect to the conveying surface and rotate in opposite directions around axes that are parallel to the horizontal plane and perpendicular to the paper conveying direction.

[0021] With the above technical solution, the paper feed roller receives the paper to be printed from the suction cup and is transported to the printing press by the conveyor belt.

[0022] Furthermore, the feeding unit also includes a roller frame, which is disposed above the conveying surface and extends along the paper conveying direction; a plurality of pressure rollers are evenly disposed at one end of the roller frame near the conveying surface along the conveying direction, the pressure rollers are separated from the conveying surface by a certain distance, and the axis of the pressure rollers is parallel to the axis of the paper feeding roller.

[0023] The above technical solution uses a pressure roller to press the paper to be printed, which is placed on a conveyor belt, to prevent the paper from shifting due to external environmental factors such as wind.

[0024] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the paper conveying device provided in Embodiment 1 of this utility model;

[0026] Figure 2 This is a schematic diagram of the paper conveying device provided in Embodiment 2 of this utility model. Detailed Implementation

[0027] The applicant conducted research and analysis on existing printing presses and found that the reason for the presence of defective products that are not printed or are incompletely printed is that the surface of the paper to be printed has static electricity, which easily causes two or more sheets of paper to stick together. When the suction cup of the paper conveyor picks up the paper, it is easy to move multiple sheets of paper that are stuck together onto the conveyor belt. The conveyor belt sends multiple sheets of paper that are stuck together into the printing device, thus causing the printing press to produce defective products that are not printed or are incompletely printed.

[0028] Based on this, the applicant proposes a paper conveying device that uses a suction cup to pick up the paper to be printed. A first air nozzle is provided on one side of the suction cup, blowing air onto the paper picked up by the suction cup. This separates two or more sheets of paper that may be stuck together, ensuring that the suction cup picks up and transports only one sheet of paper to the conveyor belt at a time. This ensures that the printing device prints only one sheet of paper at a time, reducing the production of unprinted or incompletely printed defective products. The following are specific embodiments of the paper conveying device provided by this utility model:

[0029] Example 1

[0030] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the paper conveying device provided in Embodiment 1 of this utility model.

[0031] This utility model provides a paper conveying device, including a feeding platform 1, a paper separating unit 2, and a feeding unit 3.

[0032] The feeding platform 1 is provided with a feeding plane 11 parallel to the horizontal plane for stacking the paper to be printed.

[0033] The paper separating unit 2 includes a horizontal guide rail 21, a slider 22, a mounting base 23, a suction cup 24, and a first air nozzle 25. The horizontal guide rail 21 is vertically positioned above the feeding plane 11; it extends along the paper conveying direction, which points from the feeding table 1 to the feeding unit 3 and is parallel to the feeding plane 11. The slider 22 is slidably mounted on the horizontal guide rail 21. One end of the mounting base 23 is connected to the slider 22, and the other end extends vertically toward the feeding plane 11. The mounting base 23 can extend and retract vertically to move closer to or further away from the feeding plane 11. In this embodiment, the mounting base 23 can be an electric telescopic rod as used in the prior art. The suction cup 24 is positioned at the end of the mounting base 23 near the feeding plane 11 and is connected to an external vacuum device (not shown). The vacuum device provides negative pressure to the suction cup 24 to adsorb the paper to be printed, and the adsorption plane of the suction cup 24 is parallel to the feeding plane 11. Optionally, there are multiple suction cups 24, arranged along a straight line parallel to the feeding plane 11 to stably adsorb the paper to be printed. The first air nozzle 25 is located near the mounting base 23. When the suction cup 24 approaches the paper to be printed, the first air nozzle 25 is positioned outside the paper to be printed stacked on the feeding plane 11 to avoid interfering with the suction cup 24's adsorption of the paper. The outlet of the first air nozzle 25 faces the side of the paper to be printed, and the air jet direction of the first air nozzle 25 is parallel to the adsorption plane. Vertically, the first air nozzle 25 is slightly lower than the suction cup 24. When the suction cup 24 adsorbs the paper to be printed and lifts it upwards, a gap will exist between the two pieces of paper that are stuck together. At this time, the first air nozzle 25 jets air from the side of the paper to be printed, and the gas enters between the two pieces of paper that are stuck together through the gap, forcing them to separate.

[0034] Furthermore, in the vertical direction, the height difference between the first air nozzle 25 and the suction cup 24 is 10-15mm; along the air jet direction of the first air nozzle 25, the distance from the first air nozzle 25 to the side of the paper to be printed is 20-30mm. At this time, the air jet effect of the first air nozzle 25 is the best, which can provide enough air force to separate the two sticky papers to be printed, and will not blow the paper away due to excessive air force.

[0035] Furthermore, the first air nozzle 25 can be a fan-shaped nozzle from the prior art, which makes the air outlet of the first air nozzle 25 cover a large range and has a certain impact force, effectively forcing the two sticky sheets of paper to be printed to separate.

[0036] Furthermore, the paper separating unit 2 also includes a second air nozzle 26, which is disposed on one side of the feeding platform 1 and separated from the paper to be printed stacked on the feeding plane 11 by a certain distance; the air jet direction of the second air nozzle 26 is parallel to the feeding plane 11. The second air nozzle 26 is connected to an external plasma fan (not shown) to blow positive and negative electron streams onto the paper to be printed, effectively neutralizing the static electricity on the paper surface and further preventing the paper to be printed from sticking together.

[0037] The feeding unit 3 includes a conveyor table 31, a conveyor belt 32, and two paper feeding rollers 33. The conveyor table 31 is located on one side of the paper separating unit 2, and the conveyor belt 32 is laid on the conveyor table 31 to form an upward conveying surface, transporting the paper to be printed in one direction. The two paper feeding rollers 33 are located on the side of the conveyor belt 32 near the paper separating unit 2 and are symmetrically arranged about the conveying surface, used to transfer the paper to be printed, which is attracted by the suction cup 24, onto the conveyor belt 32. The two paper feeding rollers 33 are respectively connected to the output shafts of two drive motors (not shown). The output shafts of the two drive motors extend in a direction perpendicular to the conveying direction of the conveyor belt 32 and parallel to the conveying surface. The two drive motors drive the two paper feeding rollers 33 to rotate in opposite directions to provide power to transfer the paper to be printed, which is attracted by the suction cup 24, onto the conveyor belt 32. In this embodiment, the conveyor belt 32 is located on the right side of the paper separating unit 2, the paper feeding roller 33 located above the conveying surface rotates counterclockwise, and the paper feeding roller 33 located below the conveying surface rotates clockwise.

[0038] Furthermore, the feeding unit 3 also includes a roller frame 34, which is positioned above the conveying surface and separated from it by a certain distance. The extending direction of the roller frame 34 is parallel to the conveying direction of the conveyor belt 32. A plurality of pressure rollers 341 are mounted on the roller frame 34 and evenly distributed along the conveying direction of the conveyor belt 32. The axis of each pressure roller 341 is parallel to the axis of the output shaft of the drive motor. A gap exists between the bottom surface of the pressure roller 341 and the conveying surface. When the paper to be printed is transported on the conveying surface, one side of its surface contacts the conveying surface, and the other side contacts the bottom surface of the pressure roller 341. The pressure rollers 341 are used to press the paper to be printed, preventing misalignment during transport on the conveyor belt 32.

[0039] Example 2

[0040] Please refer to Figure 2 , Figure 2 This is a schematic diagram of the paper conveying device provided in Embodiment 2 of this utility model.

[0041] The overall structure of the paper conveying device provided in this embodiment is basically the same as that in Embodiment 1, except that:

[0042] Vertically, the first air nozzle 25 is higher than the suction cup 24, and the outlet of the first air nozzle 25 is inclined towards the suction cup 24, so that the air jet direction forms an angle with the adsorption plane of the suction cup 24. The first air nozzle 25 is used to cause the paper to be printed, which is adsorbed by the suction cup 24, to vibrate regularly, thereby separating two pieces of paper that may be stuck together. In this embodiment, the angle between the air jet direction of the first air nozzle 25 and the adsorption plane of the suction cup 24 is 45°–90°.

[0043] The working principle of the paper conveying device provided by this utility model is as follows: Workers stack the paper to be printed onto the feeding plane 11. A second air nozzle 24 on one side of the feeding platform 1 blows positive and negative ion air onto the paper to neutralize the static electricity on its surface. The mounting base 23 extends downwards, causing the suction cup 24 to approach and adsorb the paper to be printed. The first air nozzle 25 blows air, separating two sheets of paper that may stick together, ensuring that the suction cup 24 adsorbs only one sheet of paper at a time. Then, the mounting base 23 retracts upwards, bringing the adsorption plane and the conveying surface to the same height. The slider 22 then moves the mounting base 23 and the suction cup 24 closer to the paper feeding roller 33. When the paper feeding roller 33 contacts the paper to be printed, the suction cup 24 releases the paper, and the paper feeding roller 33 transfers the paper to the conveyor belt 32 and transports it to the printing device in the subsequent process.

[0044] Compared with existing technologies, the paper conveying device provided by this utility model has the following advantages:

[0045] (1) A first air nozzle 25 is set slightly lower than the suction cup 24 and placed horizontally. The first air nozzle 25 blows air into the gap between the two sticky sheets of paper to be printed, so that the two sticky sheets of paper to be printed are separated.

[0046] (2) A first air nozzle 25 is set above the suction cup 24 and placed at an angle. The first air nozzle 25 blows air onto the paper to be printed that is adsorbed by the suction cup 24, causing it to vibrate regularly, thereby separating the two sticky papers to be printed.

[0047] (3) The second jet nozzle 24, located on one side of the feeding platform 1, blows positive and negative ion winds onto the paper to be printed stacked on the feeding plane 11 to neutralize the static electricity on the surface of the paper to be printed, and further prevents the paper to be printed from sticking together.

[0048] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and this utility model also intends to include these modifications and variations.

Claims

1. A paper conveying device, applied to a printing press, characterized in that, include: The feeding table has a feeding plane parallel to the horizontal plane for stacking the paper to be printed. The paper separating unit, located above the feeding plane, includes a suction cup and a first air nozzle; the suction plane of the suction cup is parallel to the feeding plane and is used to absorb the paper to be printed. The first air nozzle is located on the side of the suction cup and blows air onto the paper to be printed that is adsorbed by the suction cup to separate the paper that is stuck together. The feeding unit, located next to the feeding platform, is equipped with a conveying surface that transports the paper to be printed along the paper conveying direction.

2. The paper conveying device according to claim 1, characterized in that: In the vertical direction, the first air nozzle is lower than the suction cup; in the horizontal direction, the first air nozzle is separated from the paper to be printed piled on the feeding plane by a certain distance; the air jet direction of the first air nozzle is parallel to the suction plane.

3. The paper conveying device according to claim 2, characterized in that: The height difference between the first jet nozzle and the suction cup is 10-15mm; along the jet direction of the first jet nozzle, the distance from the first jet nozzle to the paper to be printed stacked on the feeding plane is 20-30mm.

4. The paper conveying device according to claim 1, characterized in that: In the vertical direction, the first jet nozzle is higher than the suction cup, and the angle between the jet direction of the first jet nozzle and the adsorption plane is greater than 45° and less than 90°.

5. The paper conveying device according to any one of claims 1-4, characterized in that: The first jet nozzle is a fan-shaped nozzle.

6. The paper conveying device according to any one of claims 1-4, characterized in that: The paper separating unit also includes a second air nozzle, which is disposed on one side of the feeding platform and is separated from the paper to be printed stacked on the feeding plane by a certain distance in the horizontal direction; the air jet direction of the second air nozzle is parallel to the feeding plane; the second air nozzle is connected to the plasma blower.

7. The paper conveying device according to any one of claims 1-4, characterized in that: The paper-splitting unit also includes a horizontal guide rail, a slider, and a mounting base; The horizontal guide rail is disposed above the feeding plane and extends along the paper conveying direction; the slider is slidably disposed on the horizontal guide rail; One end of the mounting base is connected to the slider, and the other end extends vertically toward the feeding plane; the mounting base can extend and retract vertically; the suction cup is located at the end of the mounting base near the feeding plane.

8. The paper conveying device according to claim 7, characterized in that: The number of suction cups is several, and the suction cups are arranged at intervals along a straight line parallel to the feeding plane.

9. The paper conveying device according to any one of claims 1-4, characterized in that: The feeding unit includes a conveyor table, a conveyor belt, and two paper feeding rollers; The conveyor table is located next to the paper separating unit, and the conveyor belt is laid on the conveyor table to form an upward conveying surface and transport the paper to be printed along the paper conveying direction; Two paper feeding rollers are arranged on the side of the conveyor belt near the paper separating unit; in the vertical direction, the two paper feeding rollers are symmetrically arranged with respect to the conveying surface and rotate in opposite directions about axes that are parallel to the horizontal plane and perpendicular to the paper conveying direction.

10. The paper conveying device according to claim 9, characterized in that: The feeding unit also includes a roller frame, which is disposed above the conveying surface and extends along the paper conveying direction; a plurality of pressure rollers are evenly arranged at one end of the roller frame near the conveying surface along the conveying direction, the pressure rollers are separated from the conveying surface by a certain distance, and the axis of the pressure rollers is parallel to the axis of the paper feeding roller.

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