Protective mechanism for paper conveying part of offset press

Abstract

The utility model discloses a protection mechanism for a paper conveying part of an offset press, which relates to the technical field of auxiliary printing equipment and comprises two side plates which are bilaterally symmetrical, a first conveying roller is rotatably mounted between the side plates, and a second conveying roller is arranged right above the first conveying roller. By arranging the piston cylinder, the piston, the air ejector pipe and the nozzle, paper is conveyed through friction force between the first conveying roller and the second conveying roller, the driving assembly drives the first conveying roller to rotate and synchronously drives the rotating disc, and the rotating disc drives the piston rod to do reciprocating rectilinear motion under constraint of the guide block through the connecting rod and the U-shaped connecting piece. When the piston moves downwards in the piston cylinder, airflow enters the connecting cylinder from the air inlet, the one-way air inlet valve is opened, and the one-way air outlet valve is closed, when the piston moves upwards, the one-way air inlet valve is closed, the one-way air outlet valve is opened, the airflow flows to the air spraying pipe from the air outlet and is sprayed out from the nozzle, and non-contact cleaning is conducted on the surface of paper. Foreign matters are prevented from entering the offset press; and secondary pollution is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to printing auxiliary equipment technical field especially relates to a kind of offset press paper conveying part protection mechanism. BACKGROUND

[0002] In the production operation of offset press, as the key starting link of the printing material into the printing unit, the stability and safety of paper conveying part is very important, which is responsible for the smooth and accurate delivery of paper to the printing unit. During this process, due to the continuous high-speed operation of the equipment, the operator sometimes needs to approach the area for necessary adjustment, observation or preparation work.

[0003] According to the search, the utility model patent with the authorization announcement number CN218453820U discloses an offset press paper conveying part protection mechanism, which comprises a base, and a mounting frame is arranged on the top of the base. The first rotating rod and the second rotating rod are installed in the mounting frame. When the paper is conveyed into the offset press through the paper conveying part, the first rotating wheel can guide the paper, and under the action of the stepping motor and the first transmission wheel and the second transmission wheel, the cleaning brush can clean the paper on the first rotating wheel to prevent foreign matter from being attached to the offset press. The mounting frame can be moved in the base by the electric telescopic rod, so as to adjust the height of the first rotating wheel on the first rotating rod, and the tightness of the paper passing through the first rotating wheel can be adjusted to prevent the paper from being wrinkled when it is conveyed into the offset press.

[0004] However, the paper conveying power of the device has two cases: the first case is the friction drive from the first rotating wheel and the second rotating wheel; the second case is the external setting conveying. The second rotating wheel adjusts the tightness of the paper, and the first rotating wheel removes foreign matter. If the first case, the surface linear velocity direction of the second rotating wheel must be the same as the advancing direction of the paper, which will cause the foreign matter cleaned by the cleaning brush to be swept to the direction of the offset press, and it is difficult to achieve the technical effect of preventing foreign matter from entering the offset press. If the second case, the surface linear velocity of the second rotating wheel can be set opposite to the advancing direction of the paper, so that the foreign matter is swept away from the direction of the offset press. However, the long-term use of the cleaning brush will cause secondary pollution of the paper, and the cleaning brush needs to be cleaned frequently. In view of this, the present application further proposes an offset press paper conveying part protection mechanism based on the above technical problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the shortcomings in the prior art and proposes an offset press paper conveying part protection mechanism.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A kind of offset press paper feeding part protection mechanism, including two left and right symmetrical side plates, first conveying roller is rotatably installed between the side plate, second conveying roller is provided above the first conveying roller, one of the side plate is provided with drive assembly for driving the rotation of first conveying roller;

[0008] One end of the first conveying roller is penetrated into the other side plate and fixedly installed with a turntable, the other side plate is fixedly installed with a guide block outside, the guide block is slidably installed with a piston rod, the bottom of the piston rod is fixedly installed with a U-shaped connecting piece, a connecting rod is rotatably installed between the U-shaped connecting piece and the turntable, the other side plate is fixedly installed with a support rod outside, the support rod is fixedly installed with a fixed ring at one end, the fixed ring is fixedly installed with a piston cylinder inside, the piston cylinder is slidably installed with a piston inside, the piston rod is fixedly connected with the piston, the piston cylinder is fixedly installed with a connecting cylinder with internal mutual penetration at top end, the left end of the connecting cylinder is provided as air inlet, the right end of the connecting cylinder is provided as air outlet, the connecting cylinder is fixedly installed with a one-way air inlet valve in left side inner cavity, the connecting cylinder is fixedly installed with a one-way air outlet valve in right side inner cavity, the air outlet is fixedly installed with a jet pipe, the jet pipe is fixedly installed with a plurality of nozzles close to the end.

[0009] Further, the drive assembly includes a motor fixedly installed outside the side plate, the motor output end is penetrated into the side plate and fixedly installed with a driving wheel, the first conveying roller is fixedly installed with a driven wheel, the driven wheel and the driving wheel are transmissionally connected with a belt.

[0010] Further, the top end between the side plates is fixedly installed with a horizontal plate, the horizontal plate is fixedly installed with a first cylinder, the output end of the first cylinder is fixedly installed with a lifting frame, and the second conveying roller is rotatably installed on the lifting frame.

[0011] Further, the other side plate is fixedly installed with a support plate, the support plate is rotatably installed with a second cylinder, the other side plate is rotatably installed with a rotating plate inside, the output end of the second cylinder is rotatably connected with the rotating plate, and the bottom end of the rotating plate is rotatably installed with a tensioning roller.

[0012] Further, the air inlet is fixedly installed with a filter box, the filter box is provided with a filter plate, and the filter box is provided with a vent hole away from the air inlet.

[0013] Further, the radius ratio of the driving wheel and the driven wheel is 1:2.

[0014] Further, the upper surface of the lifting frame is fixedly installed with a guide rod, and the guide rod is penetrated into the horizontal plate and slidably connected therewith.

[0015] Further, the bottom of the side plate is fixedly installed with a fixed seat, and the fixed seat is provided with a reserved hole.

[0016] The utility model discloses the beneficial effect is:

[0017] 1. The utility model discloses a piston cylinder, connecting cylinder, piston, air jet pipe, nozzle are set up, paper is introduced between first conveying roller and second conveying roller, and the main power of conveying paper is formed through the friction between both, and drive assembly drives first conveying roller rotation, and synchronous belt drives carousel, and carousel passes through connecting rod and U type connecting piece, and drive piston rod does accurate reciprocating linear motion under the restraint of guide block, when piston moves down, airflow enters connecting cylinder from air inlet, and one-way air inlet valve opens, and one-way air outlet valve closes, when piston moves up, one-way air inlet valve closes, and one-way air outlet valve opens, and this airflow flows to air jet pipe from air outlet and sprays from nozzle, and the airflow that sprays cleans paper surface, and the foreign matter after cleaning does not flow to offset printing machine direction, and need not clean through the mode of direct contact, avoid secondary pollution.

[0018] 2. The utility model discloses a second air cylinder, tensioning roller are set up, and the tensioning degree of paper is swung around fulcrum through second air cylinder and drives rotating plate, thereby drive tensioning roller realizes the movement of circular arc track, changes the transmission path and the wrap angle of paper through changing the position of tensioning roller, realizes accurate, flexible adjustment to the tensioning degree of paper, can effectively prevent paper slack or over-tensioning caused wrinkle and rupture in high -speed conveying.

[0019] 3. The utility model discloses a first air cylinder, lifting frame are set up, and first air cylinder drives lifting frame, can adjust the height of second conveying roller as a whole, thereby changes the clearance pressure between it and first conveying roller, to adapt to the conveying demand of paper of different thickness, and guarantees the stability of lifting process through guide rod.

[0020] 4. The utility model discloses a filter box, filter plate are set up, and the filter plate in the filter box of air inlet can effectively filter the inhaled air, prevent large particle impurities from entering the system, guarantee the clean of the air that sprays, avoid the airflow that sprays to paper existence pollution. ACCURACY

[0021] Figure 1 It is the whole structure schematic diagram of the utility model discloses a kind of offset press paper feeding part protection mechanism;

[0022] Figure 2 It is carousel schematic diagram of the utility model discloses a kind of offset press paper feeding part protection mechanism;

[0023] Figure 3 It is connecting cylinder sectional view schematic diagram of the utility model discloses a kind of offset press paper feeding part protection mechanism;

[0024] Figure 4This is a schematic diagram of a tension roller for a protective mechanism in the paper feeding section of an offset printing machine, as proposed in this utility model.

[0025] Figure 5 This is a schematic diagram of the air jet pipe of the protective mechanism for the paper feeding section of an offset printing machine proposed in this utility model;

[0026] Figure 6 This is a schematic diagram of the second conveyor roller of the protective mechanism for the paper feeding section of an offset printing machine proposed in this utility model.

[0027] In the diagram: 1. Side plate; 2. First conveying roller; 3. Second conveying roller; 4. Turntable; 5. Guide block; 6. Piston rod; 7. U-shaped connector; 8. Connecting rod; 9. Support rod; 10. Fixing ring; 11. Piston cylinder; 12. Piston; 13. Connecting cylinder; 14. Air inlet; 15. Air outlet; 16. One-way air inlet valve; 17. One-way air outlet valve; 18. Jet pipe; 19. Nozzle; 20. Motor; 21. Drive wheel; 22. Driven wheel; 23. Belt; 24. Horizontal plate; 25. First cylinder; 26. Lifting frame; 27. Support plate; 28. Second cylinder; 29. ​​Rotating plate; 30. Tensioning roller; 31. Filter box; 32. Filter plate; 33. Vent hole; 34. Guide rod; 35. Fixing seat; 36. Reserved hole. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] Reference Figures 1-3 , Figures 5-6 A protective mechanism for the paper feeding section of an offset printing machine includes two symmetrical side plates 1, a first conveying roller 2 is rotatably mounted between the side plates 1, a second conveying roller 3 is arranged directly above the first conveying roller 2, and a drive assembly for driving the first conveying roller 2 to rotate is provided on one of the side plates 1.

[0030] The first conveying roller 2 penetrates one side plate 1 and is fixedly installed with a rotating disc 4, the other side plate 1 is fixedly installed with a guide block 5, the guide block 5 is slidably installed with a piston rod 6, the bottom of the piston rod 6 is fixedly installed with a U-shaped connecting piece 7, the U-shaped connecting piece 7 is rotatably installed with a connecting rod 8 between the rotating disc 4, the other side plate 1 is fixedly installed with a supporting rod 9, the supporting rod 9 is fixedly installed with a fixed ring 10 at one end, the fixed ring 10 is fixedly installed with a piston cylinder 11 inside, the piston cylinder 11 is slidably installed with a piston 12 inside, the piston rod 6 is fixedly connected with the piston 12, the piston cylinder 11 is fixedly installed with a connecting cylinder 13 inside which penetrates each other, the left end of the connecting cylinder 13 is provided as an air inlet 14, the right end of the connecting cylinder 13 is provided as an air outlet 15, the left side of the connecting cylinder 13 is fixedly installed with a one-way air inlet valve 16, the right side of the connecting cylinder 13 is fixedly installed with a one-way air outlet valve 17, the air outlet 15 is fixedly installed with a jet pipe 18, the jet pipe 18 is fixedly installed with a plurality of nozzles 19 near the end;

[0031] The paper is introduced between the first conveying roller 2 and the second conveying roller 3, and the frictional force between the two constitutes the main power for conveying the paper, the driving assembly drives the first conveying roller 2 to rotate, synchronously drives the rotating disc 4, the rotating disc 4 drives the piston rod 6 to make accurate reciprocating linear motion under the constraint of the guide block 5 through the connecting rod 8 and the U-shaped connecting piece 7, when the piston 12 moves downward, the airflow enters the connecting cylinder 13 from the air inlet 14, the one-way air inlet valve 16 is opened and the one-way air outlet valve 17 is closed, when the piston 12 moves upward, the one-way air inlet valve 16 is closed and the one-way air outlet valve 17 is opened, the airflow flows from the air outlet 15 to the jet pipe 18 and is sprayed from the nozzles 19, the sprayed airflow cleans the surface of the paper, the cleaned foreign matter does not flow to the direction of the offset press, and does not need to be cleaned by direct contact, avoiding secondary pollution.

[0032] Referring to Figure 1 , Figure 6 , specifically: the driving assembly includes a motor 20 fixedly installed on the outside of the side plate 1, the output end of the motor 20 penetrates the side plate 1 and is fixedly installed with a driving wheel 21, the first conveying roller 2 is fixedly installed with a driven wheel 22, and the driven wheel 22 and the driving wheel 21 are transmissionally connected with a belt 23.

[0033] Referring to Figure 6 , specifically: the top of the side plate 1 is fixedly installed with a horizontal plate 24, the horizontal plate 24 is fixedly installed with a first air cylinder 25, the output end of the first air cylinder 25 is fixedly installed with a lifting frame 26, and the second conveying roller 3 is rotatably installed on the lifting frame 26;

[0034] The height of the second conveying roller 3 can be adjusted as a whole by driving the lifting frame 26 through the first cylinder 25, so as to change the gap pressure between the first conveying roller 2 and the second conveying roller 3, so as to adapt to the conveying requirements of paper with different thicknesses.

[0035] With reference to Figure 4 , specifically, the other side plate 1 is fixedly provided with a supporting plate 27, the second cylinder 28 is rotatably arranged on the supporting plate 27, the other side plate 1 is rotatably arranged with a rotating plate 29 on the inner side, the output end of the second cylinder 28 is rotatably connected with the rotating plate 29, and the rotating plate 29 is rotatably arranged with a tension roller 30 at the bottom end.

[0036] The tension of the paper is adjusted by the second cylinder 28 to drive the rotating plate 29 to swing around the supporting point, so as to drive the tension roller 30 to move along the circular arc track, the transmission path and the wrap angle of the paper are changed by changing the position of the tension roller 30, the tension of the paper is accurately and flexibly adjusted, and the wrinkles and breakage caused by the relaxation or excessive tension of the paper during high-speed conveying can be effectively prevented.

[0037] With reference to Figure 1 , Figure 3 , specifically, the filter box 31 is fixedly arranged at the air inlet 14, the filter box 31 is provided with a filter plate 32, and the filter box 31 is provided with an air hole 33 away from the air inlet 14.

[0038] The filter plate 32 can effectively filter the inhaled air, prevent large particles from entering the system, ensure the cleanliness of the sprayed air, and avoid the existence of pollution in the air flow sprayed to the paper.

[0039] With reference to Figure 1 , specifically, the ratio of the radius of the driving wheel 21 to the radius of the driven wheel 22 is 1:2.

[0040] With reference to Figure 6 , specifically, the guide rod 34 is fixedly arranged on the upper surface of the lifting frame 26, and one end of the guide rod 34 penetrates through the horizontal plate 24 and is slidably connected with the horizontal plate 24.

[0041] With reference to Figure 4 , specifically, the fixed seat 35 is fixedly arranged at the bottom of the side plate 1, and the reserved hole 36 is arranged on the fixed seat 35.

[0042] Working principle: paper is introduced between the first conveying roller 2 and the second conveying roller 3, and the friction force between the two constitutes the main power of conveying paper, the driving assembly drives the first conveying roller 2 to rotate, synchronously drives the rotating disc 4, the rotating disc 4 drives the piston rod 6 to make accurate reciprocating linear motion under the constraint of the guide block 5, when the piston 12 moves downward, the airflow enters the connecting cylinder 13 from the air inlet 14, the one-way air inlet valve 16 opens, and the one-way air outlet valve 17 closes, when the piston 12 moves upward, the one-way air inlet valve 16 closes, and the one-way air outlet valve 17 opens, the airflow flows from the air outlet 15 to the air jet pipe 18 and is sprayed from the nozzle 19, the sprayed airflow cleans the surface of the paper, the cleaned foreign matter does not flow to the direction of the offset press, and cleaning is not required by direct contact, thereby avoiding secondary pollution;

[0043] The tension of the paper is realized by the second air cylinder 28 driving the rotating plate 29 to swing around the fulcrum, thereby driving the tension roller 30 to move in a circular arc track, the transmission path and the wrap angle of the paper are changed by changing the position of the tension roller 30, the accurate and flexible adjustment of the tension of the paper is realized, and the wrinkles and breakage caused by the relaxation or excessive tension of the paper during high-speed conveying can be effectively prevented;

[0044] The filter plate 32 inside the filter box 31 arranged at the air inlet 14 can effectively filter the inhaled air, prevent large particles from entering the system, ensure the cleanliness of the sprayed air, and avoid pollution of the airflow sprayed to the paper;

[0045] In addition, the height of the second conveying roller 3 can be adjusted as a whole by the first air cylinder 25 driving the lifting frame 26, so that the gap pressure between the second conveying roller 3 and the first conveying roller 2 is changed, so as to adapt to the conveying requirements of paper of different thicknesses, and the stability of the lifting process is ensured by the guide rod 34.

[0046] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

[0047] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

Claims

1. A protective mechanism for the paper feeding section of an offset printing machine, characterized in that, It includes two symmetrical side plates (1), a first conveying roller (2) is rotatably mounted between the side plates (1), a second conveying roller (3) is arranged directly above the first conveying roller (2), and a drive assembly for driving the first conveying roller (2) to rotate is provided on one of the side plates (1); One end of the first conveying roller (2) passes through another side plate (1) and is fixedly mounted on a turntable (4). A guide block (5) is fixedly mounted on the outer side of the other side plate (1). A piston rod (6) is slidably mounted on the guide block (5). A U-shaped connector (7) is fixedly mounted on the bottom of the piston rod (6). A connecting rod (8) is rotatably mounted between the U-shaped connector (7) and the turntable (4). A support rod (9) is fixedly mounted on the outer side of the other side plate (1). A fixing ring (10) is fixedly mounted on one end of the support rod (9). A piston cylinder (11) is fixedly mounted inside the fixing ring (10). A piston (12) is slidably installed inside the piston cylinder (11). The piston rod (6) is fixedly connected to the piston (12). A connecting cylinder (13) with internal interconnection is fixedly installed at the top of the piston cylinder (11). The left end of the connecting cylinder (13) is set as an air inlet (14), and the right end of the connecting cylinder (13) is set as an air outlet (15). A one-way air inlet valve (16) is fixedly installed in the left inner cavity of the connecting cylinder (13), and a one-way air outlet valve (17) is fixedly installed in the right inner cavity of the connecting cylinder (13). A jet pipe (18) is fixedly installed at the air outlet (15), and several nozzles (19) are fixedly installed near the end of the jet pipe (18).

2. The protective mechanism for the paper feeding section of an offset printing machine according to claim 1, characterized in that, The drive assembly includes a motor (20) fixedly installed on the outside of the side plate (1). The output end of the motor (20) passes through the side plate (1) and is fixedly installed with a drive wheel (21). A driven wheel (22) is fixedly installed on the first conveying roller (2). A belt (23) is connected between the driven wheel (22) and the drive wheel (21).

3. The protective mechanism for the paper feeding section of an offset printing machine according to claim 1, characterized in that, A horizontal plate (24) is fixedly installed between the top ends of the side plate (1). A first cylinder (25) is fixedly installed on the horizontal plate (24). A lifting frame (26) is fixedly installed at the output end of the first cylinder (25). The second conveying roller (3) is rotatably installed on the lifting frame (26).

4. The protective mechanism for the paper feeding section of an offset printing machine according to claim 1, characterized in that, A support plate (27) is fixedly installed on one of the side plates (1), and a second cylinder (28) is rotatably installed on the support plate (27). A rotating plate (29) is rotatably installed on the inner side of the other side plate (1). The output end of the second cylinder (28) is rotatably connected to the rotating plate (29). A tension roller (30) is rotatably installed at the bottom end of the rotating plate (29).

5. A protective mechanism for the paper feeding section of an offset printing machine according to claim 1, characterized in that, A filter box (31) is fixedly installed at the air inlet (14), and a filter plate (32) is provided inside the filter box (31). A vent hole (33) is provided at the end of the filter box (31) away from the air inlet (14).

6. A protective mechanism for the paper feeding section of an offset printing machine according to claim 2, characterized in that, The ratio of the radius of the driving wheel (21) to that of the driven wheel (22) is 1:

2.

7. A protective mechanism for the paper feeding section of an offset printing machine according to claim 3, characterized in that, A guide rod (34) is fixedly installed on the upper surface of the lifting frame (26). One end of the guide rod (34) passes through the horizontal plate (24) and is slidably connected to it.

8. A protective mechanism for the paper feeding section of an offset printing machine according to claim 1, characterized in that, Each side plate (1) has a fixed base (35) fixedly installed at its bottom, and the fixed base (35) has a reserved hole (36).

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