Automatic paper feeding device for offset press

Abstract

The utility model discloses an automatic paper feeding device for an offset press, which comprises a base vertically arranged on the ground; the feeding table is horizontally arranged on the base and used for bearing paper; the conveying belt is horizontally arranged at the terminating end of the feeding table and used for feeding and conveying the paper; the supporting frame is vertically arranged on the side wall of the base; the sliding base is horizontally connected to the supporting frame in a sliding mode, and an electric cylinder for controlling the sliding base to horizontally slide is arranged on the supporting frame; the sliding plate is horizontally arranged below the sliding seat, and an air cylinder for controlling the sliding plate to vertically slide is arranged on the sliding seat; the sliding rods are vertically and slidably connected to the four corners of the sliding plate; the sucker is arranged at the lower end of the sliding rod; and the springs sleeve the outer wall of the sliding rod and are distributed above and below the sliding plate. According to the automatic feeding device, the springs are arranged up and down, automatic shaking can be achieved after paper is sucked by the suction cups, the adhered paper is shaken off, stable feeding of a single piece of paper is guaranteed, and the printing quality is guaranteed.

Description

Technical Field

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

[0002] Offset printing press, also known as planographic offset printing press, is a widely used printing equipment. It works based on the principle of "oil and water are immiscible," and is an indirect printing method that transfers the image from the printing plate to a rubber blanket, and then from the rubber blanket to paper or other substrates. This method can provide high-quality printing results and is suitable for high-volume printing tasks.

[0003] Traditional offset printing machines typically use suction cups to pick up paper and then use a conveyor belt to transport it. However, during the paper picking process, the paper itself sticks together, causing the number of sheets loaded at one time to exceed one sheet, which affects the normal printing of the offset printing machine and needs to be improved. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an automatic paper feeding device for offset printing machines, which has the effect of precise feeding.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an automatic paper feeding device for offset printing machines, comprising:

[0006] The base is set vertically on the ground;

[0007] The feeding platform is horizontally positioned on the base and is used to support the paper.

[0008] A conveyor belt is horizontally positioned at the end of the loading platform and is used for feeding and transporting paper.

[0009] A support frame is vertically mounted on the side wall of the base;

[0010] A slide block is slidably connected to the support frame, and an electric cylinder is provided on the support frame to control the horizontal sliding of the slide block;

[0011] A sliding plate is horizontally positioned below the slide block, and a cylinder is provided on the slide block to control the vertical sliding movement of the sliding plate;

[0012] The sliding rod is vertically slidably connected to the four corners of the sliding plate;

[0013] A suction cup is provided at the lower end of the sliding rod;

[0014] Springs are sleeved on the outer wall of the sliding rod and distributed above and below the sliding plate.

[0015] In a preferred embodiment, the present invention can be further configured such that a fine hair roller is horizontally rotatably connected to the end position of the feeding platform.

[0016] In a preferred embodiment, the present invention can be further configured such that: a gantry frame is provided at the starting end of the conveyor belt, and a paper pressing wheel that abuts against the surface of the conveyor belt is rotatably connected to the gantry frame.

[0017] In a preferred embodiment, the present invention can be further configured such that: clamps are vertically arranged on both sides of the loading platform, and a drive mechanism is provided on the loading platform to control the clamps to move closer or further apart from each other.

[0018] In a preferred embodiment, the present invention can be further configured such that: the driving mechanism includes a driving block, a bidirectional screw, and a handwheel; the driving block is disposed on the lower end face of the clamping plate; the bidirectional screw is horizontally rotatably connected to the loading platform and threadedly connected to the driving block; and the handwheel is disposed on the outer end of the bidirectional screw.

[0019] In a preferred embodiment, the present invention can be further configured as follows: the base includes a bottom tube, a bottom rod, an airbag, and an inflation mechanism. The bottom tube is vertically disposed on the ground, the bottom rod is connected to the loading platform and is vertically slidably connected to the bottom tube, the airbag is disposed inside the bottom tube and located below the bottom rod, and the inflation mechanism is connected to the airbag.

[0020] In a preferred embodiment, the present invention can be further configured such that: the inflation mechanism includes an air pump, a connecting pipe, and a linkage rod; the air pump is vertically mounted on the slide; the connecting pipe connects the air pump and the air bag; and the linkage rod is mounted on the sliding plate and connected to the push-pull rod of the air pump.

[0021] In summary, this utility model has the following beneficial effects:

[0022] 1. By setting up springs at the top and bottom, the suction cup can automatically shake after adsorbing the paper, shaking off any stuck paper, ensuring stable feeding of single sheets of paper and guaranteeing printing quality;

[0023] 2. By setting up a fine-bristle roller to automatically clean the adsorbed paper, the sticky paper is peeled off, ensuring stable feeding of individual sheets and guaranteeing printing quality;

[0024] 3. By setting a floating base, the height of the feeding platform can be automatically adjusted, thereby achieving stable feeding of the entire stack of paper. Attached Figure Description

[0025] Figure 1 This is a structural schematic diagram of an embodiment;

[0026] Figure 2 This is a schematic diagram of the connection relationship in the embodiment;

[0027] Figure 3 This is a schematic diagram of the base structure of an embodiment.

[0028] Reference numerals: 1. Base; 11. Bottom tube; 12. Bottom rod; 13. Airbag; 14. Inflation mechanism; 15. Air pump; 16. Connecting pipe; 17. Linkage rod; 2. Feeding platform; 21. Fine brush roller; 22. Clamping plate; 23. Drive mechanism; 24. Drive block; 25. Bidirectional screw; 26. Handwheel; 3. Conveyor belt; 31. Gantry frame; 32. Paper pressing roller; 4. Support frame; 41. Electric cylinder; 5. Slide seat; 51. Air cylinder; 6. Sliding plate; 7. Sliding rod; 8. Suction cup; 9. Spring. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings.

[0030] like Figure 1 , Figure 2 As shown, an automatic paper feeding device for an offset printing machine includes a base 1, a feeding platform 2, a conveyor belt 3, a support frame 4, a slide 5, a sliding plate 6, a sliding rod 7, a suction cup 8, and a spring 9.

[0031] like Figure 1 , Figure 2 As shown, the base 1 is vertically set on the ground, and the feeding platform 2 is horizontally set on the base 1 and is used to support the paper. The end of the feeding platform 2 is horizontally rotatably connected to a fine roller 21. Both sides of the feeding platform 2 are vertically set with clamping plates 22. The feeding platform 2 is equipped with a drive mechanism 23 that controls the clamping plates 22 to move closer or further apart.

[0032] like Figure 1 , Figure 2 , Figure 3 As shown, the drive mechanism 23 includes a drive block 24, a bidirectional screw 25, and a handwheel 26. The drive block 24 is disposed on the lower end face of the clamping plate 22, the bidirectional screw 25 is horizontally rotatably connected to the loading table 2 and threadedly connected to the drive block 24, and the handwheel 26 is disposed on the outer end of the bidirectional screw 25.

[0033] like Figure 1 , Figure 2 As shown, the conveyor belt 3 is horizontally positioned at the end of the loading platform 2 and is used for feeding and transporting paper. A gantry frame 31 is provided at the beginning of the conveyor belt 3, and a paper-pressing roller 32 is rotatably connected to the gantry frame 31 to abut against the surface of the conveyor belt 3.

[0034] like Figure 1 , Figure 2As shown, the support frame 4 is vertically mounted on the side wall of the base 1, and the slide block 5 is horizontally slidably connected to the support frame 4. An electric cylinder 41 is mounted on the support frame 4 to control the horizontal sliding of the slide block 5. A sliding plate 6 is horizontally mounted below the slide block 5, and a pneumatic cylinder 51 is mounted on the slide block 5 to control the vertical sliding of the sliding plate 6.

[0035] like Figure 1 , Figure 2 As shown, the sliding rod 7 is vertically slidably connected to the four corners of the sliding plate 6, the suction cup 8 is set at the lower end of the sliding rod 7, and the spring 9 is sleeved on the outer wall of the sliding rod 7 and distributed above and below the sliding plate 6.

[0036] When paper needs to be fed and transported, the entire stack of paper is placed on the feeding platform 2. Then, the handwheel 26 is controlled to drive the bidirectional screw 25 to rotate. The bidirectional screw 25 drives a pair of drive blocks 24 to move closer to each other. The drive blocks 24 drive the clamping plate 22 to move synchronously and clamp both sides of the paper to achieve the limiting of the entire stack of paper.

[0037] Then, cylinder 51 drives sliding plate 6 downward, which in turn drives sliding rod 7 and suction cup 8 downward, adsorbing the top layer of paper. Subsequently, cylinder 51 drives sliding plate 6 upward, lifting the top layer of paper. At the same time, springs 9 above and below sliding plate 6 extend and retract freely, causing sliding rod 7 and suction cup 8 to vibrate freely, shaking off any stuck-together paper and ensuring stable feeding of individual sheets.

[0038] Then, the electric cylinder 41 controls the slide block 5 to slide horizontally, so that the paper moves toward the conveyor belt 3. When the paper passes the position of the fine roller 21, the fine roller 21 automatically cleans the paper that has been adsorbed, peels off the paper that is stuck together, and ensures stable feeding of single sheets of paper.

[0039] The sliding block 5 then moves to transport the paper to the starting position of the conveyor belt 3, where it follows the conveyor belt 3. Simultaneously, with the cooperation of the pressure roller 32, stable paper transport is achieved, completing the automatic feeding of the first sheet of paper. The above steps are then repeated to feed sheets of paper one by one.

[0040] like Figure 1 , Figure 2 , Figure 3 As shown, the base 1 includes a bottom tube 11, a bottom rod 12, an airbag 13, and an inflation mechanism 14. The bottom tube 11 is vertically set on the ground. The bottom rod 12 is connected to the loading platform 2 and is vertically slidably connected to the bottom tube 11. The airbag 13 is set inside the bottom tube 11 and is located below the bottom rod 12.

[0041] like Figure 1 , Figure 2 , Figure 3As shown, the inflation mechanism 14 is connected to the airbag 13. The inflation mechanism 14 includes an air pump 15, a connecting pipe 16, and a linkage rod 17. The air pump 15 is vertically mounted on the slide block 5. The connecting pipe 16 connects the air pump 15 and the airbag 13. The linkage rod 17 is mounted on the sliding plate 6 and is connected to the push-pull rod of the air pump 15.

[0042] Before feeding the paper, the air bladder 13 is deflated, and then the paper is placed on the feeding platform 2. As the paper is fed, the sliding plate 6 will move vertically back and forth repeatedly. At this time, the sliding plate 6 drives the linkage rod 17 to move synchronously, and drives the push-pull rod on the air pump 15 to move back and forth, so that the air pump 15 is inflated one after another, and the air is filled into the air bladder 13. The expansion of the air bladder 13 gradually pushes the bottom rod 12 and the feeding platform 2 upward, ensuring that other papers automatically float after the paper is picked up, and achieving stable paper feeding.

[0043] The specific embodiments are merely explanations of this utility model and are not intended to limit it. After reading this specification, those skilled in the art can make modifications to these embodiments without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this utility model.

Claims

1. An automatic paper feeding device for an offset printing machine, characterized in that: include: The base (1) is vertically set on the ground; The loading platform (2) is horizontally set on the base (1) and is used to support the paper; The conveyor belt (3) is horizontally positioned at the end of the loading platform (2) and is used for feeding and transporting paper. A support frame (4) is vertically mounted on the side wall of the base (1); The slide (5) is horizontally slidably connected to the support frame (4), and the support frame (4) is provided with an electric cylinder (41) for controlling the horizontal sliding of the slide (5); A sliding plate (6) is horizontally positioned below the slide block (5), and a cylinder (51) is provided on the slide block (5) to control the vertical sliding of the sliding plate (6); The sliding rod (7) is vertically slidably connected to the four corners of the sliding plate (6); A suction cup (8) is disposed at the lower end of the sliding rod (7); Spring (9) is sleeved on the outer wall of the sliding rod (7) and distributed above and below the sliding plate (6).

2. The automatic paper feeding device for an offset printing machine according to claim 1, characterized in that: The feed table (2) is horizontally rotatably connected to a fine hair roller (21) at its end position.

3. The automatic paper feeding device for an offset printing machine according to claim 1, characterized in that: A gantry frame (31) is provided at the starting end of the conveyor belt (3), and a paper pressing wheel (32) that abuts against the surface of the conveyor belt (3) is rotatably connected to the gantry frame (31).

4. The automatic paper feeding device for an offset printing machine according to claim 1, characterized in that: The loading platform (2) is provided with clamps (22) on both sides, and the loading platform (2) is provided with a drive mechanism (23) for controlling the clamps (22) to move closer or further apart.

5. The automatic paper feeding device for an offset printing machine according to claim 4, characterized in that: The drive mechanism (23) includes a drive block (24), a bidirectional screw (25), and a handwheel (26). The drive block (24) is located on the lower end face of the clamping plate (22). The bidirectional screw (25) is horizontally rotatably connected to the loading platform (2) and threadedly connected to the drive block (24). The handwheel (26) is located at the outer end of the bidirectional screw (25).

6. The automatic paper feeding device for an offset printing machine according to claim 1, characterized in that: The base (1) includes a bottom tube (11), a bottom rod (12), an airbag (13), and an inflation mechanism (14). The bottom tube (11) is vertically set on the ground. The bottom rod (12) is connected to the loading platform (2) and is vertically slidably connected to the bottom tube (11). The airbag (13) is set inside the bottom tube (11) and located below the bottom rod (12). The inflation mechanism (14) is connected to the airbag (13).

7. The automatic paper feeding device for an offset printing machine according to claim 6, characterized in that: The inflation mechanism (14) includes an air pump (15), a connecting pipe (16), and a linkage rod (17). The air pump (15) is vertically mounted on the slide (5). The connecting pipe (16) connects the air pump (15) and the air bag (13). The linkage rod (17) is mounted on the sliding plate (6) and is connected to the push-pull rod of the air pump (15).

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