Offset press paper feeding turnover structure

Abstract

The utility model relates to the technical field of offset press paper feeding turnover mechanisms, in particular to an offset press paper feeding turnover structure which comprises a shell. An overturning bin is arranged in the shell in a cylindrical shape, an overturning shaft is rotationally installed in the overturning bin, a paper outlet bin communicated with the overturning bin is arranged on the lower portion of the shell, a paper falling assembly is arranged in the paper outlet bin, and a paper outlet communicated with the paper outlet bin is horizontally formed in the bottom side face of the shell. A paper inlet communicated with the overturning bin is horizontally formed in the upper portion of the shell, gummed paper can enter the position between the limiting shaft and the overturning shaft from the upper portion, when the overturning shaft rotates, the gummed paper can be driven to be conveyed to the lower portion of the overturning shaft from the upper portion of the overturning shaft, and the gummed paper can fall on two supporting strips located in the paper outlet bin and located on the same horizontal plane. The gummed paper is sent out from the paper outlet through the transmission belt, the gummed paper overturning effect is achieved in a matched mode, compared with a traditional gummed paper overturning mechanism, the overall structure is smaller, and continuous gummed paper overturning operation can be conducted.

Description

Technical Field

[0001] The utility model relates to the technical field of paper feeding and turning mechanisms of offset printing machines, in particular to a paper feeding and turning structure of an offset printing machine. Background Art

[0002] An offset printing press is a type of printing equipment suitable for large-scale, small-volume printing. The image and text are first printed on a rubber roller, which is then rolled onto the adhesive paper. However, the common offset paper machines currently only print on one side. After printing on one side of the paper, the paper needs to be turned over to print on the other side. Therefore, a paper feed and flipping mechanism for an offset printing press is required.

[0003] A patent with announcement number CN 221607253 U discloses a paper feeding and turning mechanism of an offset printing machine, including a frame, a conveying assembly, a turning assembly and a transmission assembly. The conveying assembly is provided at the edge position of the inner side of the frame, the turning assembly is provided on the inner side of the frame, and the transmission assembly is provided on the turning assembly; the paper is transported to the turning assembly through the conveying assembly and can be used as temporary storage. When the offset printing reaches a specified quantity, the cylinder pushes the pressure plate to fix the paper to prevent the paper from falling off during the turning process. After turning over, the transmission assembly on the bottom plate drives the transmission roller to move through the second motor-driven belt to transmit the paper on the turning assembly to achieve the effect of turning over the paper.

[0004] However, since the existing paper feeding and turning mechanism of the offset printing machine occupies a large space, the space occupied by the offset printing machine will be increased when in use, and the printing operation can only be continued after the turning assembly is turned into place, which leads to the continuity of the printing operation and affects the printing efficiency. Therefore, to address the above problems, a paper feeding and turning structure of the offset printing machine is proposed. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art and address the problems existing in the prior art, the utility model proposes a paper feeding and turning structure for an offset printing machine.

[0006] The technical solution adopted by the present invention to solve the technical problem is as follows: the paper feeding and turning structure of the offset printing machine described in the present invention comprises a housing; a turning bin is provided in a cylindrical shape in the housing, a turning shaft is rotatably installed in the turning bin, a paper discharge bin is provided at the lower part of the housing and is communicated with the turning bin, the communication opening between the paper discharge bin and the turning bin is located directly below the turning bin, and the communication opening between the paper discharge bin and the turning bin is arranged horizontally;

[0007] A paper drop assembly is provided in the paper discharge bin, a paper discharge port communicating with the paper discharge bin is horizontally provided on the bottom side of the housing, a paper feed port communicating with the flip bin is horizontally provided on the upper portion of the housing, and the paper discharge bin is located directly below the paper feed port;

[0008] A paper feeding assembly is provided at the bottom of the paper discharge bin, and the active end of the paper feeding assembly is extended outside the paper discharge port, which cooperates to achieve the function of flipping the adhesive paper. Compared with the traditional adhesive paper flipping mechanism, the overall structure is smaller and can perform continuous adhesive paper flipping operations, effectively ensuring the efficiency of adhesive paper printing processing.

[0009] Preferably, two limit bars are symmetrically fixed on the inner curved surface of the flip bin, and a plurality of limit shafts are evenly distributed and rotatably installed between the two limit bars, and the plurality of limit shafts are evenly distributed and arranged on the opposite side of the flip bin and the paper output bin, so as to achieve the effect of fixing the adhesive tape and ensure that the adhesive tape can move with the flip shaft.

[0010] Preferably, the shell is located on the upper and lower sides of the paper output bin and has two No. 1 through slots symmetrically formed therethrough. The paper delivery assembly includes two fixing frames, and two transmission rods are horizontally rotatably installed between the upper and lower ends of the two fixing frames. Two transmission chains are vertically transmitted on the two transmission rods through toothed plates respectively. A plurality of support bars are evenly distributed and fixedly connected to the outer curved surface of the transmission chain, and the rotational tracks of the support bars on both sides can pass through the two No. 1 through slots set in the paper output bin, which achieves the effect of continuous transportation after the adhesive paper is flipped, ensuring that the flipping mechanism can perform continuous flipping operations on the adhesive paper.

[0011] Preferably, the paper feeding assembly includes a No. 2 through slot, a No. 1 transmission shaft is rotatably installed in the opening of the No. 2 through slot, and a No. 2 transmission shaft is rotatably installed outside the opening of the No. 2 through slot located on the side of the paper outlet, a transmission belt for rotation is provided between the No. 1 transmission shaft and the No. 2 transmission shaft, and the transmission track on the upper surface of the transmission belt is located on the upper surface of the paper outlet bin, which cooperates to achieve the function of conveying the adhesive paper and ensure that the flipping mechanism can discharge the flipped adhesive paper.

[0012] Preferably, a No. 2 motor for driving the transmission rod is provided in the paper delivery assembly, a No. 1 motor for driving the flip shaft is provided on the outside of the outer shell, and a No. 3 motor for driving the No. 2 transmission shaft is provided in the paper feeding assembly, and the No. 2 motor, No. 1 motor and No. 3 motor can all be replaceably connected to the transmission components inside the offset printing machine, and cooperate to achieve the function of driving the flip mechanism.

[0013] Preferably, a No. 2 guide plate is fixedly connected to the flip bin, and the side of the No. 2 guide plate is tilted and arranged on the curved surface of the flip shaft. The No. 2 guide plate is located at the upper part of the connecting opening between the paper output bin and the flip bin, and cooperates to achieve the effect of peeling off the adhesive tape and prevent the adhesive tape from sticking to the flip shaft.

[0014] Preferably, a guide plate No. 1 is fixedly connected to the connecting opening between the paper feed port and the flipping bin, and the side edge of the guide plate No. 1 is tilted and arranged between the flipping bin and the limit shaft, so as to achieve the function of guiding the entry of the adhesive paper and ensure the normal flipping operation of the adhesive paper.

[0015] The utility model is beneficial in that:

[0016] 1. According to the utility model, under the guidance of the No. 1 guide plate, the adhesive paper enters from the upper part between the limit shaft and the turning shaft. When the turning shaft rotates, the adhesive paper is driven to be transferred from the upper part of the turning shaft to the lower part of the turning shaft. Under the action of the No. 2 guide plate, the adhesive paper is scraped off the curved surface of the turning shaft. When the two transmission rods rotate, they respectively drive the two transmission chains through the toothed plates thereon. The adhesive paper falls on two support bars located on the same horizontal plane in the paper discharge bin. The adhesive paper is sent out from the paper discharge port through the transmission belt. The combination achieves the effect of adhesive paper turning. Compared with the traditional adhesive paper turning mechanism, the overall structure is smaller and the adhesive paper turning operation can be carried out continuously, effectively ensuring the efficiency of adhesive paper printing processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 is a schematic diagram of a first three-dimensional structure;

[0019] Figure 2 It is an enlarged schematic diagram of the cutaway main structure of the shell;

[0020] Figure 3 It is an enlarged cutaway diagram of the main structure of the turning bin and the paper discharge bin;

[0021] Figure 4 This is an enlarged schematic diagram of the main structure of the internal components of the turnover bin;

[0022] Figure 5 This is an enlarged schematic diagram of the main structure of the paper dropping component;

[0023] Figure 6 This is an enlarged schematic diagram of the cutaway main structure of the paper feeding component.

[0024] In the figure: 1. Outer casing; 2. Turning bin; 3. Paper discharge bin; 4. Turning shaft; 5. Limit bar; 6. Limit shaft; 7. Guide plate No. 1; 8. Guide plate No. 2; 9. Through slot No. 1; 10. Fixed frame; 11. Transmission rod; 12. Sprocket; 13. Transmission chain; 14. Support bar; 15. Through slot No. 2; 16. Transmission shaft No. 1; 17. Transmission shaft No. 2; 18. Transmission belt; 19. Paper inlet; 20. Paper outlet; 21. Motor No. 1; 22. Motor No. 2; 23. Motor No. 3. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1-6 As shown, a paper feeding and turning structure of an offset printing machine includes a housing 1; Figure 1-Figure 3 In the embodiment, a cylindrical turning bin 2 is provided in the shell 1, a turning shaft 4 is rotatably installed in the turning bin 2, and a paper discharge bin 3 communicating with the turning bin 2 is provided at the lower part of the shell 1. The communication opening between the paper discharge bin 3 and the turning bin 2 is located directly below the turning bin 2, and the communication opening between the paper discharge bin 3 and the turning bin 2 is horizontally arranged;

[0027] The paper discharge bin 3 is provided with a paper drop assembly, the bottom side of the housing 1 is horizontally provided with a paper discharge port 20 communicating with the paper discharge bin 3, the upper part of the housing 1 is horizontally provided with a paper feed port 19 communicating with the flip bin 2, and the paper discharge bin 3 is located directly below the paper feed port 19;

[0028] A paper feeding assembly is provided at the bottom of the paper discharge bin 3, and the active end of the paper feeding assembly is extended outside the paper discharge port 20. By feeding the adhesive paper after single-sided printing from the paper inlet 19 into the turning bin 2, the adhesive paper will be moved downwardly along the surface of the turning shaft 4 driven by the turning shaft 4, and when the adhesive paper moves to the connection between the turning bin 2 and the paper discharge bin 3, it will turn over, and its printed surface will turn over to the lower surface. The turned-over adhesive paper will enter the paper discharge bin 3, and as the paper dropping assembly slowly lowers the adhesive paper to the paper feeding assembly provided at the bottom of the paper discharge bin 3, the turned-over adhesive paper will be fed out through the paper discharge port 20 under the action of the paper feeding assembly, thereby completing the turning process of the adhesive paper after single-sided printing.

[0029] like Figure 3 and Figure 4 In the figure, two limit bars 5 are symmetrically fixed on the inner curved surface of the turning bin 2, and a plurality of limit shafts 6 are evenly distributed and rotatably installed between the two limit bars 5, and the plurality of limit shafts 6 are evenly distributed and arranged on the opposite side of the turning bin 2 and the paper output bin 3. When the adhesive paper enters the turning bin 2, it will enter between the turning bin 4 and the plurality of limit shafts 6 under the drive of the turning shaft 4, and under the squeezing of the plurality of limit shafts 6, the adhesive paper is tightly attached to the surface of the turning shaft 4, preventing the adhesive paper from slipping off the surface of the turning shaft 4, and ensuring that the adhesive paper can be turned over in the turning bin 2 after single-sided printing.

[0030] like Figure 3-Figure 5In the embodiment, the shell 1 is located on the upper and lower sides of the paper discharge bin 3 and symmetrically penetrates two No. 1 through slots 9. The paper dropping assembly includes two fixing frames 10. Two transmission rods 11 are installed horizontally and rotatably between the upper and lower ends of the two fixing frames 10. Two transmission chains 13 are respectively arranged on the two transmission rods 11 for vertical transmission through toothed discs 12. The outer curved surface of the transmission chain 13 is evenly distributed and fixed with multiple support bars 14, and the rotation tracks of the support bars 14 on both sides can penetrate the two No. 1 through slots 9 and be arranged in the paper discharge bin 3. When the adhesive paper enters the paper discharge bin 3, under the transmission support of the transmission rod 11, the two transmission chains 13 will drive the support strips 14 evenly distributed on its surface to pass through the No. 1 through slot 9 opened at the upper part of the paper discharge bin 3, and then move out from the two No. 1 through slots 9 opened at the lower part of the paper discharge bin 3. At this time, the overturned adhesive paper entering the paper discharge bin 3 can be transported to the two support strips 14 located on the same horizontal plane. When the adhesive paper is supported by the two support strips 14 and descends to the paper feeding assembly, the paper feeding assembly will transport the adhesive paper on the two support strips 14 to the paper discharge port 20 and discharge it from the paper discharge port 20, thereby ensuring that the overturned adhesive paper can be sent out in the same direction so that printing can be performed on the upper surface of the overturned adhesive paper.

[0031] like Figure 2 、 Figure 3 、 Figure 4 and Figure 6 In the drawing, the paper feeding assembly includes a No. 2 through slot 15, in which a No. 1 transmission shaft 16 is rotatably installed at the opening of the No. 2 through slot 15, and a No. 2 transmission shaft 17 is rotatably installed outside the opening of the No. 2 through slot 15 on one side of the paper outlet 20. A transmission belt 18 for rotation is provided between the No. 1 transmission shaft 16 and the No. 2 transmission shaft 17, and the transmission track on the upper surface of the transmission belt 18 is located on the upper surface of the paper outlet bin 3. When the adhesive paper falls to the upper surface of the transmission belt 18 under the action of the paper dropping assembly, the transmission belt 18 will be driven by the No. 2 transmission shaft 17 to transmit between the No. 1 transmission shaft 16 and the No. 2 transmission shaft 17, and then the adhesive paper falling on the transmission belt 18 is sent out from the paper outlet 20.

[0032] like Figure 1 and Figure 2 In the embodiment, the paper delivery assembly is provided with a No. 2 motor 22 for driving the transmission rod 11, the outer side of the shell 1 is provided with a No. 1 motor 21 for driving the flip shaft 4, and the paper feeding assembly is provided with a No. 3 motor 23 for driving the No. 2 transmission shaft 17, and the No. 2 motor 22, the No. 1 motor 21 and the No. 3 motor 23 can all be replaced and connected to the transmission components inside the offset printing machine.

[0033] like Figure 4In the figure, a No. 2 guide plate 8 is fixedly connected to the flip bin 2, and the side of the No. 2 guide plate 8 is tilted and arranged on the curved surface of the flip shaft 4. The No. 2 guide plate 8 is located at the upper part of the communication opening between the paper discharge bin 3 and the flip bin 2. The No. 2 guide plate 8 is used to scrape off the adhesive tape attached to the surface of the flip shaft 4 to prevent the adhesive tape from being unable to detach from the flip shaft 4 when it moves with the flip shaft 4 to the communication opening between the flip bin 2 and the paper discharge bin 3, thereby ensuring the flipping process.

[0034] like Figure 3 In the figure, a guide plate No. 1 is fixedly connected to the communicating opening between the paper feed port 19 and the turning bin 2, and the side of the guide plate No. 1 is tilted and arranged between the turning bin 2 and the limit shaft 6. The guide plate No. 1 is used to guide the adhesive paper entering from the paper feed port 19, so that the adhesive paper can accurately enter between the limit shaft 6 and the turning bin 4 for transmission, avoiding the adhesive paper entering between the limit shaft 6 and the inner wall of the turning bin 2 to cause paper jam, thereby ensuring the accurate implementation of the turning process.

[0035] During operation, since the paper feeding and turning mechanism of the existing offset printing machine occupies a large space, the space occupied by the offset printing machine will be increased when in use, and when the turning assembly is turned, the printing operation can only be continued after the turning assembly is turned into place, resulting in the continuity of the printing operation and affecting the printing efficiency. In this solution, the adhesive paper after single-sided printing is fed into the turning bin 2 from the paper feed port 19, and the turning shaft 4 is driven by the No. 1 motor 21. Under the guidance of the No. 1 guide plate 7, the adhesive paper will enter between the limit shaft 6 and the turning shaft 4 from the top. When the turning shaft 4 rotates, it will drive the adhesive paper from the top of the turning shaft 4 to the turning bin 2. The adhesive paper is placed at the bottom of the roll shaft 4. During the transmission process, the adhesive paper will be tightly attached to the side curved surface of the flip shaft 4 under the pressure of the evenly distributed limit shafts 6, and the upper surface of the adhesive paper will be flipped to the bottom after printing, and the lower surface will be flipped to the top. When the adhesive paper is flipped and transported to the connection between the flip bin 2 and the paper output bin 3, the adhesive paper will be scraped off the curved surface of the flip shaft 4 under the action of the second guide plate 8, and then the flipped adhesive paper will enter the paper output bin 3. The second motor 22 is controlled to drive the transmission rod 11. When the two transmission rods 11 rotate, they will respectively drive the two transmission rods through the toothed discs 12 thereon. The two transmission chains 13 are used for transmission, and during the transmission process, the two transmission chains 13 will respectively drive the support bars 14 evenly distributed on the side curved surfaces to enter the paper discharge bin 3 from the No. 1 through slot 9 opened at the upper part of the paper discharge bin 3, and move out of the paper discharge bin 3 from the No. 1 through slot 9 opened at the lower part of the paper discharge bin 3. In this process, when the adhesive paper enters the paper discharge bin 3, the adhesive paper will fall on the two support bars 14 located on the same horizontal plane in the paper discharge bin 3, and with the transmission of the transmission rod 11, the adhesive paper on the two support bars 14 located on the same horizontal plane will move toward the lower part of the paper discharge bin 3, cooperating with the control of the No. 3 motor 23 to the two The first transmission shaft 17 is driven by the second transmission shaft 17, and the second transmission shaft 17 is driven by the first transmission shaft 16 to drive the transmission belt 18 in the opening of the second through slot 15. When the adhesive paper moves down to the upper surface of the transmission belt 18 supported by the two support bars 14, the adhesive paper will be moved out from the support bar 14 under the belt of the transmission belt 18 and move toward the paper outlet 20. Finally, the adhesive paper is sent out from the paper outlet 20 through the transmission belt 18, and the effect of flipping the adhesive paper is achieved. Compared with the traditional adhesive paper flipping mechanism, the overall structure is smaller, and continuous adhesive paper flipping operation can be performed, which effectively ensures the efficiency of adhesive paper printing processing.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A paper feeding and turning structure for an offset printing press, characterized in that: The invention comprises a shell (1); a cylindrical turning bin (2) is provided in the shell (1); a turning shaft (4) is rotatably installed in the turning bin (2); a paper discharge bin (3) communicating with the turning bin (2) is provided at the lower part of the shell (1); a communication opening between the paper discharge bin (3) and the turning bin (2) is located directly below the turning bin (2), and the communication opening between the paper discharge bin (3) and the turning bin (2) is arranged horizontally; A paper drop assembly is provided in the paper discharge bin (3); a paper discharge port (20) communicating with the paper discharge bin (3) is horizontally provided on the bottom side of the housing (1); a paper feed port (19) communicating with the flip bin (2) is horizontally provided on the upper portion of the housing (1); and the paper discharge bin (3) is located directly below the paper feed port (19); A paper feeding assembly is provided at the bottom of the paper discharge bin (3), and an active end of the paper feeding assembly is extended and provided outside the paper discharge port (20).

2. The paper feeding and turning structure of an offset printing press according to claim 1, characterized in that: Two limiting bars (5) are symmetrically fixed on the inner curved surface of the turnover bin (2), and a plurality of limiting shafts (6) are evenly distributed and rotatably mounted between the two limiting bars (5). The plurality of limiting shafts (6) are evenly distributed and arranged on the side of the turnover bin (2) opposite to the paper discharge bin (3).

3. The paper feeding and turning structure of an offset printing press according to claim 1, characterized in that: The housing (1) is symmetrically provided with two No. 1 through slots (9) on the upper and lower sides of the paper discharge bin (3). The paper discharge assembly comprises two fixing frames (10). Two transmission rods (11) are horizontally rotatably mounted between the upper and lower ends of the two fixing frames (10). Two transmission chains (13) are respectively provided on the two transmission rods (11) for vertical transmission via toothed discs (12). A plurality of support bars (14) are evenly distributed and fixed on the outer curved surface of the transmission chain (13), and the rotational tracks of the support bars (14) on both sides can pass through the two No. 1 through slots (9) and be arranged in the paper discharge bin (3).

4. The paper feeding and turning structure of an offset printing press according to claim 1, characterized in that: The paper feeding assembly comprises a No. 2 through slot (15), a No. 1 transmission shaft (16) is rotatably mounted in the opening of the No. 2 through slot (15), a No. 2 transmission shaft (17) is rotatably mounted outside the opening of the No. 2 through slot (15) located on one side of the paper outlet (20), a transmission belt (18) for rotation is provided between the No. 1 transmission shaft (16) and the No. 2 transmission shaft (17), and a transmission track on the upper surface of the transmission belt (18) is located on the upper surface of the paper outlet bin (3).

5. The paper feeding and turning structure of an offset printing press according to claim 1, characterized in that: A second motor (22) for driving a transmission rod (11) is provided in the paper delivery assembly, a first motor (21) for driving a flip shaft (4) is provided outside the housing (1), a third motor (23) for driving a second transmission shaft (17) is provided in the paper feeding assembly, and the second motor (22), the first motor (21) and the third motor (23) can all be replaced and connected to a transmission component inside the offset printing machine.

6. The paper feeding and turning structure of an offset printing press according to claim 5, characterized in that: A second guide plate (8) is fixedly connected to the flip bin (2), and the side of the second guide plate (8) is tilted and arranged on the curved surface of the flip shaft (4). The second guide plate (8) is located at the upper part of the communication opening between the paper discharge bin (3) and the flip bin (2).

7. The paper feeding and turning structure of an offset printing press according to claim 5, characterized in that: A guide plate (7) is fixedly connected to the communication opening between the paper feed port (19) and the turnover bin (2), and the side of the guide plate (7) is tilted and arranged between the turnover bin (2) and the limiting shaft (6).

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