A paper loading device for a printing press

Abstract

The utility model relates to printing equipment technical field discloses a paper loading device of printing machine, including "U" work table, work table bottom is equipped with hydraulic cylinder, and the lifting plate is connected through hydraulic telescopic link, and adjustable limiting frame is equipped on the inner baffle of work table, and the limiting frame is driven by second cylinder to adapt to different specifications paper. Work table top is equipped with transmission screw rod, drives transmission frame and mounting frame to move, and the vacuum suction nozzle with pressure disc has at mounting frame bottom, and the high and low difference side wall is equipped on the limiting frame, and mounting frame still is equipped with camera. The device lifts paper through hydraulic cylinder, and the limiting frame cooperates with the air blower device and prevents sticking, and the high and low side wall and pressure disc ensure single suction, and the camera assists positioning and detects the balance, realizes paper automatic loading, improves the adaptability, stability and efficiency, is applicable to all kinds of printing machine feeding scene.

Description

Technical Field

[0001] This utility model relates to the field of printing equipment technology, specifically to a paper feeding device for a printing machine. Background Technology

[0002] In the printing industry, paper feeding is a crucial step in the printing process. The stability, efficiency, and accuracy of the feeding directly affect printing quality and production efficiency. Existing paper feeding devices for printing presses suffer from poor adaptability. Traditional feeding devices often have fixed-size paper limiting structures, which cannot flexibly adapt to different paper sizes. Changing paper sizes requires manual disassembly or adjustment of the limiting components, which is cumbersome, time-consuming, and affects production continuity. Paper is prone to sticking. When paper is stacked, due to static electricity or the attraction between paper sheets, the vacuum nozzle may pick up a single sheet of paper, easily pulling up the paper below it, resulting in multiple sheets being fed at once, causing paper jams or printing misalignment, requiring frequent manual intervention and reducing efficiency. Alignment accuracy is insufficient. Paper is prone to skewing during stacking. Existing devices lack effective automatic alignment or limiting adjustment structures, leading to paper position deviations during feeding and affecting subsequent printing registration accuracy. Adsorption stability is poor. When the vacuum nozzle directly adsorbs paper, if the paper surface is uneven, it is easy for the adsorption to be weak or for local wrinkles to occur, causing the paper to fall off or deform during feeding. Therefore, it is necessary to design a paper feeding device that can adapt to different paper sizes, effectively prevent sticking, and improve adsorption stability to meet the needs of efficient and stable printing production. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a paper feeding device for a printing press to solve the problems of traditional paper feeding devices being unable to flexibly adapt to different paper sizes and the tendency for paper to stick together.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A paper feeding device for a printing machine includes a U-shaped worktable, a hydraulic cylinder at the bottom of the worktable, a hydraulic telescopic rod above the hydraulic cylinder, the top of the hydraulic telescopic rod being fixedly connected to the bottom of a lifting plate, a partition inside the worktable, a through hole in the middle of the partition matching the lifting plate, and limit frames on the left and right sides of the through hole on the partition.

[0006] The top inner wall of the workbench has corresponding grooves, and a transmission screw is installed in the groove. One end of the transmission screw is equipped with a motor, and the other end of the transmission screw is rotatably connected to the inner wall of the groove. The two transmission screws are respectively threaded to one end of the transmission frame. A first cylinder is fixedly connected to the middle of the transmission frame. A first cylinder telescopic rod is installed at the bottom of the first cylinder. The bottom of the first cylinder telescopic rod is fixedly connected to the top of the mounting frame. Multiple vacuum nozzles are installed at the bottom of the mounting frame.

[0007] Preferably, the limiting frame is a “]” shaped limiting frame arranged opposite to each other. A second cylinder is provided between the limiting frame and the inner wall of the workbench on the partition. A second cylinder extension rod is provided at the end of the second cylinder near the limiting frame. The end of the second cylinder extension rod near the limiting frame is fixedly connected to the side wall of the limiting frame.

[0008] Preferably, a blowing device is provided on the side wall of the limiting frame near the second cylinder, a vent is provided at the upper end of the limiting frame, and a blowing nozzle is provided at the upper end of the blowing device near the limiting frame, with the blowing nozzle located inside the vent.

[0009] Preferably, the height of the side wall of the limiting frame away from the motor should be lower than the height of the other two side walls.

[0010] Preferably, a pressure plate is provided on the outer periphery of the bottom of the vacuum nozzle.

[0011] Preferably, a camera is installed at the bottom center of the mounting bracket.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The second cylinder drives the limit frame to move, allowing for flexible adjustment of the limit spacing to accommodate different paper sizes. This solves the problems of poor adaptability and cumbersome changeover operations associated with traditional fixed limit structures, improving the device's versatility. The air blowing device and nozzles on the limit frame eliminate static electricity between the papers. Combined with the lower side wall of the limit frame, excess paper carried by the vacuum nozzle during suction is effectively scraped away, preventing paper jams or printing misalignments caused by feeding multiple sheets at once and reducing manual intervention. The pressure plate at the bottom of the vacuum nozzle flattens the paper surface before suction, especially for paper with raised edges, improving suction stability and preventing paper from falling off or wrinkling during feeding. A camera not only monitors the remaining paper level in real time to remind users to replenish, but also assists the mounting frame in accurately positioning the limit frame and the printing press's feeding port, solving the positioning deviation problem in traditional feeding methods and improving feeding accuracy. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a cross-sectional view of the internal structure of this utility model;

[0016] Figure 3 This utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0017] Figure 4 This utility model Figure 1 Enlarged structural diagram at point B.

[0018] The components include: 1. Workbench; 101. Partition; 1011. Through hole; 102. Groove; 2. Drive screw; 201. Motor; 3. Transmission frame; 4. First cylinder; 401. First cylinder telescopic rod; 5. Mounting frame; 6. Vacuum nozzle; 601. Pressure plate; 7. Second cylinder; 701. Second cylinder telescopic rod; 8. Limiting frame; 801. Ventilation port; 9. Lifting plate; 10. Hydraulic cylinder; 1001. Hydraulic telescopic rod; 11. Blowing device; 1101. Blowing nozzle; 12. Camera. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1 - Figure 4 A paper feeding device for a printing machine includes a U-shaped worktable 1, a hydraulic cylinder 10 at the bottom of the worktable 1, a hydraulic telescopic rod 1001 above the hydraulic cylinder 10, the top of the hydraulic telescopic rod 1001 being fixedly connected to the bottom of a lifting plate 9, a partition 101 inside the worktable 1, a through hole 1011 in the middle of the partition 101 matching the lifting plate 9, and limit frames 8 on the left and right sides of the through hole 1011 on the partition 101.

[0021] A groove 102 is correspondingly provided on the inner wall of the top of the workbench 1. A transmission screw 2 is provided in the groove 102. A motor 201 is provided at one end of the transmission screw 2. The other end of the transmission screw 2 is rotatably connected to the inner wall of the groove 102. The two transmission screws 2 are respectively threaded to one end of the transmission frame 3. A first cylinder 4 is fixedly connected to the middle of the transmission frame 3. A first cylinder telescopic rod 401 is provided at the bottom of the first cylinder 4. The bottom of the first cylinder telescopic rod 401 is fixedly connected to the top of the mounting frame 5. Multiple vacuum nozzles 6 are provided at the bottom of the mounting frame 5.

[0022] Through the above technical solution, a U-shaped workbench 1 is set as the overall support frame, providing an installation foundation for components such as the hydraulic cylinder 10, partition 101, and transmission screw 2, thus realizing the integrated arrangement of various components; a hydraulic cylinder 10 and a hydraulic telescopic rod 1001 connected to it are set, with a lifting plate 9 fixed to the top of the hydraulic telescopic rod 1001, and the lifting plate 9 can pass through the through hole 1011 of the partition 101, realizing the automatic lifting of stacked papers and ensuring that the papers are always at a height that is convenient for vacuum suction nozzle 6 to pick up; limiting brackets 8 are set on the left and right sides of the through hole 1011 on the partition 101 to realize the lateral limiting of stacked papers and prevent the paper stacking from being skewed; a transmission screw is set in the groove 102 at the top of the workbench 1. Rod 2, one end of the transmission screw 2 is connected to the motor 201, and the other end is rotatably connected to the inner wall of the groove 102. The transmission frame 3 is threadedly connected to the transmission screw 2, so that when the motor 201 drives the transmission screw 2 to rotate, the transmission frame 3 moves horizontally along the direction of the groove 102, thereby driving the mounting frame 5 to adjust its lateral position. A first cylinder 4 and a first cylinder telescopic rod 401 are set in the middle of the transmission frame 3. The mounting frame 5 is fixed at the bottom of the first cylinder telescopic rod 401, so that the first cylinder 4 drives the mounting frame 5 to move up and down, which facilitates the vacuum nozzle 6 to contact or detach from the paper. Multiple vacuum nozzles 6 are set at the bottom of the mounting frame 5 to achieve stable adsorption of a single sheet of paper, which, together with the horizontal movement of the transmission frame 3, completes the transfer of paper.

[0023] This utility model provides a technical solution in which the limiting frame 8 is "]" shaped and arranged opposite to each other. The partition 101 provides a second cylinder 7 between the limiting frame 8 and the inner wall of the workbench 1. The end of the second cylinder 7 near the limiting frame 8 is provided with a second cylinder telescopic rod 701. The end of the second cylinder telescopic rod 701 near the limiting frame 8 is fixedly connected to the side wall of the limiting frame 8.

[0024] Through the above technical solution, the "]"-shaped and relatively arranged limiting frames 8 can form a surrounding limiting effect from both sides and the front end of the paper, enhancing the constraint effect on stacked paper and preventing lateral displacement of the paper during lifting or adsorption. A second cylinder 7 is installed between the limiting frames 8 and the inner wall of the worktable 1 via a partition 101, and a second cylinder telescopic rod 701 connects the second cylinder 7 and the limiting frames 8. This allows the second cylinder 7 to drive the second cylinder telescopic rod 701 to extend or retract, thereby causing the two relatively opposing limiting frames 8 to move synchronously closer or further apart in the horizontal direction. This structural design allows the spacing of the limiting frames 8 to be flexibly adjusted according to the paper width, adapting to different paper sizes.

[0025] This utility model provides a technical solution in which a blowing device 11 is provided on the side wall of the limiting frame 8 near the second cylinder 7, a ventilation port 801 is provided at the upper end of the limiting frame 8, and a blowing nozzle 1101 is provided at the upper end of the blowing device 11 near the limiting frame 8, and the blowing nozzle 1101 is located in the ventilation port 801.

[0026] Through the above technical solution, a blowing device 11 is set on the side wall of the limiting frame 8 near the second cylinder 7. This, along with the ventilation port 801 at the upper end of the limiting frame 8 and the blowing nozzle 1101 placed within the ventilation port 801, allows the airflow generated by the blowing device 11 to be precisely blown through the blowing nozzle 1101 and the ventilation port 801 to the paper stacking area between the limiting frames 8. When the vacuum nozzle 6 picks up paper and rises, the airflow can directly act between the picked-up paper and the stacked paper below, effectively eliminating static electricity generated by friction between the papers. Simultaneously, the airflow pressure separates potentially sticky papers, preventing the vacuum nozzle 6 from picking up paper below while picking up a single sheet. This ensures that only one sheet is fed per load, reducing paper jams or printing misalignment caused by multiple sheets stacked together.

[0027] This utility model provides a technical solution in which the height of the side wall of the limiting frame 8 away from the motor 201 is lower than the height of the other two side walls.

[0028] Through the above technical solution, the side wall of the limiting frame 8 away from the motor 201 is set to be lower than the other two side walls, forming a height difference structure. When the vacuum nozzle 6 picks up paper and moves to this side with the transmission frame 3, this lower side wall can be used to physically block any excess paper that may be attached to the paper below it. When the picked-up paper rises with the mounting frame 5 to a height slightly higher than this lower side wall, the transmission frame 3 drives it to move to the side of the lower side wall. At this time, if there is any excess paper attached, it will be blocked by the lower side wall and separated from the picked-up single sheet of paper. Only the single sheet of paper firmly picked up by the vacuum nozzle 6 is allowed to pass smoothly and be transported to the printing press loading port. This design, in conjunction with the static elimination function of the blowing device 11, further enhances the effect of "loading only one sheet of paper at a time", effectively avoiding paper jams or printing failures caused by multiple sheets of paper stacking, and improving the accuracy of loading.

[0029] This utility model provides a technical solution in which a pressure plate 601 is provided on the outer periphery of the bottom of the vacuum nozzle 6.

[0030] Through the above technical solution, a pressure plate 601 is set on the outer periphery of the bottom of the vacuum nozzle 6. When the first cylinder 4 drives the mounting frame 5 to descend, the pressure plate 601 will contact the paper surface before the vacuum nozzle 6. Its planar structure will flatten any uneven parts such as raised edges or local wrinkles that may exist at the top of the paper stack. This design ensures that the vacuum nozzle 6 can fit tightly against the paper surface, avoiding air leakage or insufficient contact area caused by uneven paper, thereby enhancing the adhesion of the vacuum nozzle 6 to the paper and preventing the paper from falling off during the feeding process or causing new wrinkles due to uneven local force.

[0031] This utility model provides a technical solution in which a camera 12 is provided at the bottom center of the mounting bracket 5.

[0032] Through the above technical solution, the camera 12 located in the middle of the bottom of the mounting frame 5 can achieve dual functions through image recognition technology: On the one hand, the camera 12 can capture the paper stacking status between the upper limit frame 8 of the partition 101 in real time, detect the paper stacking height through image analysis, calculate the remaining amount and issue an early warning to avoid the printing press stopping due to material shortage; on the other hand, the camera 12 can identify the position of the limit frame 8 and the coordinates of the printing press loading port, transmit the position information to the control system, and assist the mounting frame 5 in adjusting the movement path to ensure that the vacuum nozzle 6 can accurately align with the low side wall of the limit frame 8 and the printing press loading port after adsorbing the paper, effectively improving the positioning accuracy during the loading process, reducing paper conveying errors caused by position deviation, and further ensuring the stability and efficiency of the loading.

[0033] The working principle of this utility model is as follows:

[0034] First, according to the specifications of the paper to be processed, the second cylinder extension rod 701 is driven by the second cylinder 7 between the inner wall of the workbench 1 and the limiting frame 8 to extend and retract, adjusting the distance between the two relatively set "]"-shaped limiting frames 8, so that the limiting frames 8 form a surrounding constraint from both sides and the front end of the paper, stably limiting the stacked paper on the partition 101. When it is necessary to feed paper to the printing press, the transmission mechanism (the transmission frame 3 driven by the motor 201) drives the mounting frame 5 to move above the paper stacking area. At this time, the camera 12 at the bottom of the mounting frame 5 first detects the paper stacking status: on the one hand, it confirms whether the remaining amount of paper is sufficient, and if it is insufficient, it issues a replenishment reminder; on the other hand, it identifies the position of the limiting frame 8 and the coordinates of the printing press loading port, providing a positioning reference for the subsequent movement path.

[0035] Subsequently, the first cylinder 4 drives the mounting frame 5 to descend. The pressure plate 601 on the outer periphery of the vacuum nozzle 6 at the bottom of the mounting frame 5 first contacts the top of the paper, flattening any potentially warped or wrinkled paper. Then, the vacuum nozzle 6 activates, using negative pressure to adsorb the top sheet of paper. Simultaneously, the blowing device 11 on the side wall of the limiting frame 8 blows air into the gaps between the papers through the blowing nozzle 1101 within the ventilation port 801. This airflow eliminates static electricity and separates any potentially stuck paper, preventing the vacuum nozzle 6 from adsorbing multiple sheets of paper. After adsorption is complete, the first cylinder 4 drives the mounting frame 5 to rise, and the transmission frame 3 drives the mounting frame 5 to move towards the side of the limiting frame 8 away from the motor 201 (i.e., the side with the lower sidewall height). If a small amount of excess paper is carried along, it will be blocked by this lower sidewall and separated from the adsorbed sheet, ensuring that only a single sheet of paper is transported.

[0036] Finally, with the positioning assistance of camera 12, mounting bracket 5 moves precisely to the printing press loading port, vacuum nozzle 6 releases negative pressure, and smoothly places the paper at the loading port, completing one loading operation. The above process can be repeated to achieve continuous and stable paper feeding.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A paper feeding device for a printing press, characterized in that: Includes a "U"-shaped workbench (1), with a hydraulic cylinder (10) at the bottom of the workbench (1) and a hydraulic telescopic rod (1001) above the hydraulic cylinder (10). The top of the hydraulic telescopic rod (1001) is fixedly connected to the bottom of the lifting plate (9). A partition (101) is provided inside the workbench (1), with a through hole (1011) in the middle of the partition (101) that matches the lifting plate (9). Limit frames (8) are provided on the left and right sides of the through hole (1011) on the partition (101). The workbench (1) has a groove (102) on the inner wall of the top. A transmission screw (2) is installed in the groove (102). A motor (201) is installed at one end of the transmission screw (2). The other end of the transmission screw (2) is rotatably connected to the inner wall of the groove (102). The two transmission screws (2) are threaded to one end of the transmission frame (3). A first cylinder (4) is fixedly connected in the middle of the transmission frame (3). A first cylinder telescopic rod (401) is installed at the bottom of the first cylinder (4). The bottom of the first cylinder telescopic rod (401) is fixedly connected to the top of the mounting frame (5). Multiple vacuum nozzles (6) are installed at the bottom of the mounting frame (5).

2. The paper feeding device for a printing press according to claim 1, characterized in that: The limiting frame (8) is a "]" shaped limiting frame that is arranged opposite to each other. A second cylinder (7) is provided between the limiting frame (8) and the inner wall of the worktable (1) on the partition (101). A second cylinder telescopic rod (701) is provided at one end of the second cylinder (7) near the limiting frame (8). The end of the second cylinder telescopic rod (701) near the limiting frame (8) is fixedly connected to the side wall of the limiting frame (8).

3. The paper feeding device for a printing press according to claim 2, characterized in that: A blower (11) is provided on the side wall of the limiting frame (8) near the second cylinder (7). A vent (801) is provided at the upper end of the limiting frame (8). A blower nozzle (1101) is provided at the upper end of the blower (11) near the limiting frame (8). The blower nozzle (1101) is located inside the vent (801).

4. The paper feeding device for a printing press according to claim 2, characterized in that: The height of the side wall of the limiting frame (8) away from the motor (201) should be lower than the height of the other two side walls.

5. The paper feeding device for a printing press according to claim 1, characterized in that: A pressure plate (601) is provided on the outer periphery of the bottom of the vacuum nozzle (6).

6. The paper feeding device for a printing press according to claim 1, characterized in that: A camera (12) is installed in the middle of the bottom of the mounting bracket (5).

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