Paper discharging device for lithographic printing machine

Abstract

The utility model discloses a paper discharging device for a lithographic printing machine, which belongs to the technical field of printing machines and comprises two groups of cross rods, rollers are uniformly and rotatably mounted between the two groups of cross rods, driving motors are mounted at the end parts of the outer sides of the cross rods, and the output ends of the driving motors are connected with the end parts of the rollers through chain wheels. And a U-shaped frame is fixed between the bottoms of the cross rods. The side plates are symmetrically arranged at the position close to the feeding end, and are used in cooperation with a distance adjusting mechanism composed of the two-way screw rod, the sliding block and the mounting rod, so that paper can be subjected to position correction after falling onto the rolling wheels, the accuracy of the conveying position is guaranteed, in addition, the U-shaped frame is mounted at the bottoms of the rolling wheels, and the conveying efficiency is improved. And the negative-pressure fan is arranged at the bottom of the U-shaped frame, in the paper conveying process, the negative-pressure fan sucks air from the position below the rolling wheels, downward suction force can be applied to the paper on the surfaces of the rolling wheels, it is guaranteed that the paper is attached to the surfaces of the rolling wheels, and conveying is more stable.

Description

Technical Field

[0001] The utility model relates to a paper discharging device, in particular to a paper discharging device for a lithographic printing press, belonging to the technical field of printing presses. Background Art

[0002] In the prior art, for example, a utility model with publication number 201420597479.7 discloses a new type of powered roller paper discharge device. Paper is pushed out of a machine and is pushed onto the paper discharge device by the machine's transport mechanism. After the paper is pushed onto the roller of the paper discharge device, a control switch is turned on, and the motor starts to rotate. The motor drives the chain to rotate, and the chain drives the roller to roll. The friction force between the roller and the paper is generated by gravity, so that the roller rolls and drives the paper forward, thereby achieving the purpose of transporting paper. The power required for the roller to roll is less than that required for transmission by a drive belt, which can save energy.

[0003] Similar to the above application, there are still some shortcomings:

[0004] During the paper conveying process, the friction between the paper and the roller is used to push the paper. Since the weight of a single layer of paper is light and it is easily disturbed by the outside world during the single layer conveying process, the conveying stability is affected. In addition, the position of the paper cannot be corrected during the conveying process, and the paper cannot be conveyed in a straight line. In addition, when the paper is pushed onto the roller, the friction between the papers will generate static electricity, and dust is easily attached to the surface of the paper.

[0005] For this purpose, a paper discharge device for a lithographic printing press is designed to optimize the above-mentioned problem. Utility Model Content

[0006] The main purpose of the utility model is to provide a paper discharge device for a lithographic printing machine. By symmetrically arranging side plates near the feed end position, and then using a spacing adjustment mechanism composed of a bidirectional screw, a slider and a mounting rod, the position of the paper can be corrected after falling onto the roller to ensure the accuracy of the conveying position. In addition, by installing a U-shaped frame at the bottom of the roller and providing a negative pressure fan at the bottom of the U-shaped frame, during the paper conveying process, the negative pressure fan sucks air from the bottom of the roller, which will apply a downward suction force to the paper on the surface of the roller to ensure that the paper is attached to the surface of the roller, and the conveying is more stable. By arranging an ion rod between two groups of cross bars, static electricity can be eliminated during the paper conveying process. Then, an exhaust hood is arranged on the top of the ion rod, and the air pipe is connected to the inner bottom end of the mounting box, so that the wind discharged by the negative pressure fan can be guided to the inside of the exhaust hood for discharge, thereby accelerating the ion movement rate, quickly eliminating static electricity, and blowing off the dust on the surface of the paper. Then, the negative pressure fan is used to extract, and the filter bag is used to filter, and the surface of the paper is cleaned, thereby improving the functionality of the device.

[0007] The purpose of the utility model can be achieved by adopting the following technical solutions:

[0008] A paper discharge device for a lithographic printing machine includes a cross bar, two groups of cross bars are symmetrically arranged, rollers are evenly rotated and installed between the two groups of cross bars, a drive motor is installed at the end of the outer side of the cross bar, the output end of the drive motor is connected to the end of the roller by a sprocket, a U-shaped frame is fixed between the bottoms of the cross bars, air holes are evenly opened at the bottom of the U-shaped frame away from the entrance end, an installation box is installed below the U-shaped frame, a negative pressure fan is installed inside the installation box, installation plates are symmetrically arranged on both sides of the installation box, and a correction mechanism for adjusting the position of paper is provided at the end of the top of the U-shaped frame away from the air hole.

[0009] Preferably: the correction mechanism includes side panels and a spacing adjustment assembly, the side panels are symmetrically arranged at both ends of the roller, and the bottom ends of the side panels are provided with arc grooves that cooperate with the roller surface, the side panels slide along the length direction of the roller, and the end of the side panel away from the air hole is open to the outside, and a spacing adjustment assembly is provided between the bottoms of the two sets of side panels.

[0010] Preferably: the spacing adjustment assembly includes a bidirectional screw, a slider and a mounting rod, the bidirectional screw is rotatably installed between the two sides of the U-shaped frame, the sliders are threadedly installed at both ends of the bidirectional screw, a mounting rod is fixed between the top of the slider and the bottom of the side plate, and the mounting rod passes through the two sets of rollers.

[0011] Preferably, one end of the bidirectional screw penetrates to the outside of the U-shaped frame, and an adjusting wheel is fixed to one end of the bidirectional screw located on the outside of the U-shaped frame.

[0012] Preferably, an ion rod is installed between the two groups of cross bars, and the ion rod is located at one end of the U-shaped frame away from the air hole.

[0013] Preferably, an exhaust hood is arranged on the top of the ion rod in an inclined manner toward the side plate, and an air pipe is installed between the top end of the exhaust hood and the bottom end of the installation box.

[0014] Preferably: a filter bag is horizontally installed at the bottom of the installation box, and the connection between the air pipe and the installation box is located below the filter bag.

[0015] The beneficial effects of the utility model are:

[0016] The utility model provides a paper discharge device for a planographic printing machine. By symmetrically arranging side plates near the feeding end, and then using a spacing adjustment mechanism composed of a bidirectional screw, a slider and a mounting rod, the paper can be corrected in position after falling onto the roller, thereby ensuring the accuracy of the conveying position. In addition, by installing a U-shaped frame at the bottom of the roller, and providing a negative pressure fan at the bottom of the U-shaped frame, during the conveying process of the paper, the negative pressure fan sucks air from the bottom of the roller, exerts a downward suction force on the paper on the surface of the roller, thereby ensuring that the paper is attached to the surface of the roller, and the conveying is more stable.

[0017] By setting an ion rod between the two sets of cross bars, static electricity can be eliminated during paper transportation. The exhaust hood is then set on the top of the ion rod and connected to the inner bottom end of the installation box through an air pipe. The wind discharged by the negative pressure fan can be guided to the inside of the exhaust hood for discharge, thereby accelerating the ion movement rate, quickly eliminating static electricity, and blowing off dust on the surface of the paper. The dust is then extracted by the negative pressure fan and filtered by the filter bag to clean the surface of the paper, thereby improving the functionality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the front view of the utility model;

[0019] Figure 2 It is a side sectional view of the utility model;

[0020] Figure 3 It is a side panel diagram of the utility model;

[0021] Figure 4 This is a U-shaped frame diagram of the present utility model.

[0022] In the figure: 1. cross bar; 2. roller; 3. drive motor; 4. U-shaped frame; 5. air hole; 6. mounting box; 7. negative pressure fan; 8. mounting plate; 9. side plate; 10. bidirectional screw; 11. slider; 12. mounting rod; 13. ion rod; 14. exhaust hood; 15. air pipe; 16. filter bag. DETAILED DESCRIPTION

[0023] In order to make the technical solution of the utility model more clear and specific to those skilled in the art, the utility model is further described in detail below in conjunction with embodiments and drawings, but the implementation methods of the utility model are not limited thereto.

[0024] like Figure 1-Figure 4 As shown, this embodiment provides a paper discharge device for a lithographic printing machine, including a cross bar 1, two groups of cross bars 1 are symmetrically provided, and rollers 2 are evenly rotated and installed between the two groups of cross bars 1, a driving motor 3 is installed at the end of the outer side of the cross bar 1, and the output end of the driving motor 3 is connected to the end of the roller 2 through a sprocket, a U-shaped frame 4 is fixed between the bottom of the cross bar 1, and air holes 5 are evenly opened at the bottom of the U-shaped frame 4 away from the entrance end, an installation box 6 is installed below the U-shaped frame 4, a negative pressure fan 7 is installed inside the installation box 6, and installation plates 8 are symmetrically provided on both sides of the installation box 6, and a correction mechanism for adjusting the position of the paper is provided at the end of the top of the U-shaped frame 4 away from the air hole 5.

[0025] The overall working principle is as follows: the paper is pushed between the rollers 2, and the driving motor 3 is started to control the transportation of the paper. During the transportation process, the position of the paper is first corrected by the correction mechanism, and then the paper is transported in a straight line. During the transportation process, in order to ensure the stability of the paper, the negative pressure fan 7 is started to generate negative pressure inside the installation box 6, and air is sucked from the inside of the air hole 5. At this time, the paper is subjected to downward suction and fits more stably on the roller 2, which increases the friction between the roller 2 and the paper, so that the paper can be stably transported.

[0026] In this embodiment, the correction mechanism includes side panels 9 and a spacing adjustment assembly. The side panels 9 are symmetrically arranged at both ends of the roller 2, and an arc groove that cooperates with the surface of the roller 2 is opened at the bottom end of the side panels 9. The side panels 9 slide along the length direction of the roller 2, and the end of the side panels 9 away from the air hole 5 is open to the outside, and a spacing adjustment assembly is provided between the bottoms of the two groups of side panels 9.

[0027] Local working principle: According to the width of the paper, the spacing between the two sets of side panels 9 is controlled by the spacing adjustment component to ensure that the spacing between the parallel surfaces of the two sets of side panels 9 is the same as the width of the paper. Then, when the paper enters the top of the roller 2, the inclined surfaces of the two sets of side panels 9 guide the paper to correct the position of the paper.

[0028] In this embodiment, the spacing adjustment assembly includes a bidirectional screw 10, a slider 11 and a mounting rod 12. The bidirectional screw 10 is rotatably installed between the two sides of the U-shaped frame 4. The sliders 11 are threadedly installed at both ends of the bidirectional screw 10. The mounting rod 12 is fixed between the top of the slider 11 and the bottom of the side plate 9, and the mounting rod 12 passes through the two sets of rollers 2.

[0029] Local working principle: When adjusting the spacing between the two groups of side panels 9, first rotate the bidirectional screw 10 to control the two groups of sliders 11 to move along the length direction of the bidirectional screw 10. The two groups of sliders 11 drive the movement of the side panels 9 through the mounting rods 12 to adjust the spacing between the side panels 9.

[0030] In this embodiment, one end of the bidirectional screw rod 10 passes through the outside of the U-shaped frame 4 , and an adjusting wheel is fixed to the end of the bidirectional screw rod 10 located outside the U-shaped frame 4 .

[0031] Partial working principle: When the bidirectional screw 10 is rotated, the adjusting wheel is manually controlled to rotate, which makes the operation more convenient.

[0032] In this embodiment, an ion rod 13 is installed between the two groups of cross bars 1 , and the ion rod 13 is located at one end of the U-shaped frame 4 away from the air hole 5 .

[0033] Partial working principle: Before the paper is transported, it first passes under the ion bar 13 to eliminate the static electricity on the surface of the paper.

[0034] In this embodiment, an exhaust hood 14 is provided at the top of the ion rod 13 in an inclined manner toward the side plate 9 , and an air pipe 15 is installed between the top of the exhaust hood 14 and the bottom of the installation box 6 .

[0035] Local working principle: During the startup of the negative pressure fan 7, part of the exhausted gas enters the interior of the air pipe 15 and is discharged from the exhaust hood 14, which accelerates the ion diffusion rate, quickly eliminates static electricity, and provides a downward thrust to the paper to ensure that the paper is attached to the roller 2.

[0036] In this embodiment, a filter bag 16 is horizontally installed at the bottom of the installation box 6 , and the connection between the air pipe 15 and the installation box 6 is located below the filter bag 16 .

[0037] Partial working principle: During the process of the negative pressure fan 7 extracting gas, dust is simultaneously sucked into the interior of the installation box 6, and the dust is collected and filtered by the filter bag 16 to ensure the workshop environment.

[0038] The above is only a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the scope disclosed by the present invention according to the technical solution and concept of the present invention, which fall within the protection scope of the present invention.

Claims

1. A paper discharge device for a lithographic printing press, characterized in that: The invention comprises a cross bar (1), wherein two groups of the cross bars (1) are symmetrically provided, and rollers (2) are evenly rotated and installed between the two groups of cross bars (1), and a driving motor (3) is installed at the outer end of the cross bar (1), and the output end of the driving motor (3) is connected to the end of the roller (2) via a sprocket, and a U-shaped frame (4) is fixed between the bottoms of the cross bars (1), and air holes (5) are evenly opened at the bottom of the U-shaped frame (4) away from the entrance end, and an installation box (6) is installed below the U-shaped frame (4), and a negative pressure fan (7) is installed inside the installation box (6), and installation plates (8) are symmetrically provided on both sides of the installation box (6), and a correction mechanism for adjusting the position of paper is provided at one end of the top of the U-shaped frame (4) away from the air holes (5).

2. A paper discharge device for a planographic printing press according to claim 1, characterized in that: The correction mechanism comprises side plates (9) and a spacing adjustment component. The side plates (9) are symmetrically arranged at the two ends of the roller (2). The bottom ends of the side plates (9) are provided with arc grooves that match the surface of the roller (2). The side plates (9) slide along the length direction of the roller (2). One end of the side plates (9) away from the air holes (5) is open to the outside. A spacing adjustment component is provided between the bottoms of the two sets of side plates (9).

3. A paper discharge device for a planographic printing press according to claim 2, characterized in that: The spacing adjustment component comprises a bidirectional screw (10), a slider (11) and a mounting rod (12). The bidirectional screw (10) is rotatably mounted between the two sides of the U-shaped frame (4). The sliders (11) are threadedly mounted on both ends of the bidirectional screw (10). The mounting rod (12) is fixed between the top of the slider (11) and the bottom of the side plate (9). The mounting rod (12) passes through the two sets of rollers (2).

4. The paper discharge device for a planographic printing press according to claim 3, characterized in that: One end of the bidirectional screw rod (10) penetrates the outside of the U-shaped frame (4), and an adjusting wheel is fixed to the end of the bidirectional screw rod (10) located outside the U-shaped frame (4).

5. A paper discharge device for a planographic printing press according to any one of claims 1 to 4, characterized in that: An ion rod (13) is installed between the two groups of cross bars (1), and the ion rod (13) is located at one end of the U-shaped frame (4) away from the air hole (5).

6. A paper discharge device for a planographic printing press according to claim 5, characterized in that: An exhaust hood (14) is arranged at the top of the ion rod (13) in an inclined manner toward the side plate (9), and an air pipe (15) is installed between the top end of the exhaust hood (14) and the bottom end of the installation box (6).

7. A paper discharge device for a planographic printing press according to claim 6, characterized in that: A filter bag (16) is horizontally installed at the bottom of the installation box (6), and the connection between the air pipe (15) and the installation box (6) is located below the filter bag (16).

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