Printing machine conveying device with overturning function and using method of printing machine conveying device

Abstract

The invention discloses a printing machine conveying device with an overturning function, which comprises an arranged conveying frame, a tooth roller is arranged on the conveying frame, the side end of the tooth roller is in meshed connection with a tooth block, and the tooth block is arranged on a conveying belt; the output end of the conveying part is connected with a second magnetic block, the second magnetic block is installed in the storage box, the side end of the storage box is connected with an overturning base through an overturning assembly, a suction part is arranged in the overturning base, a storage groove is formed in the overturning base, a through groove is formed in the storage groove, and the suction part is arranged in the through groove. And through cooperation of the suction piece and the through groove, the paper is adsorbed into the storage groove. According to the printing machine conveying device with the overturning function and the using method of the printing machine conveying device, paper is adsorbed through cooperation of the suction part and the through groove, so that paper adsorption is more stable, it is guaranteed that the paper is kept flat during printing, the problem that the printing quality is reduced due to indentation is solved, the printing machine conveying device can adapt to paper of various types and thicknesses, and the printing efficiency is improved. And the utilization rate of paper is improved.

Description

Technical Field

[0001] The present invention relates to the technical field related to printing machines, and in particular to a conveying device with a flipping function for a printing machine and a use method thereof. Background Art

[0002] A printing press is a machine for printing text and images, in which a paper conveying device is an indispensable part of a color printing press. However, the existing printing press conveying device still has certain defects when in use, such as; During use, the traditional sheet conveying device is not convenient for flattening the paper, and the paper is prone to curling, which in turn affects the subsequent printing. In addition, the wrinkles of the paper will affect the printing quality, thereby reducing the qualified rate of the printed products. In order to overcome the above defects, prior art 1 (Chinese patent with application number 202022550422.X and application date 2020-11-06) A paper conveying device in a multifunctional color printing machine includes a frame, a side wall of the frame is provided with a paper inlet, a side wall of the frame and a side away from the paper inlet is provided with a paper outlet, and a paper winding roller is connected to the lower end of the frame near the middle position, and fixed blocks are symmetrically fixed on both sides of the top of the frame, and screw holes are provided on the upper surface wall of the fixed block, and a screw is screwed and connected inside the screw hole. Through the cooperation of the paper winding roller, the fixed pressure roller and the movable pressure roller, when the paper enters through the paper inlet, it first passes between the fixed pressure roller and the movable pressure roller near the paper inlet end, then bypasses the paper winding roller, and then passes between the fixed pressure roller and the movable pressure roller near the paper outlet end again, and finally is sent out, which can effectively guide the transportation of the paper, effectively avoid the skew of the paper, and ensure the accuracy of subsequent printing; There is also prior art 2 (Chinese patent with application number 201922238325.4 and application date 2019-12-13). A paper conveying device in a multifunctional color printing machine includes a printing machine body, a frame is fixedly connected to the right side of the printing machine body, a clamping mechanism is arranged at the bottom of the right side of the frame, the top of the clamping mechanism penetrates to the top of the frame, and a pipe is fixedly connected to the left side of the bottom of the inner wall of the frame. By setting the printing machine body, frame, clamping mechanism, first roller, second roller, support plate, pull rod, first spring, pipe, folding tube, horizontal tube, vertical rod, second spring, box, fan and hose for coordinated use, the problem that the existing printing machine cannot remove static electricity from the conveyed paper during use, resulting in static electricity generated by friction during paper conveyance, causing creases and wrinkles on the paper during printing, is solved. The paper conveying device in the multifunctional color printing machine has the advantage of anti-wrinkle, which improves the practicality of the printing machine; And prior art 3 (Chinese patent with application number 202022934941.6 and application date 2020-12-09) A paper conveying device in a multifunctional color printing machine, including a device body, a mounting frame is arranged inside the device body, a rubber brush is arranged inside the mounting frame, a paper insertion groove is arranged on the outer surface of the rubber brush, a No. 1 groove is arranged on the outer surface of the mounting frame, a No. 2 groove is arranged on the inner wall of the device body, a slider is arranged inside the groove, a No. 1 roller is arranged inside the device body, a No. 2 roller is arranged at the lower end of the No. 1 roller, a gap is arranged between the No. 1 roller and the No. 2 roller, the outer surfaces of the No. 1 roller and the No. 2 roller are both provided with a destaticizing layer, and a fan is arranged on the inner wall of the device body. The paper conveying device in a multifunctional color printing machine is convenient for removing paper scraps and fluffy debris on the surface of the paper, preventing paper wrinkles caused by static electricity, and can dissipate heat from the rollers.

[0003] Although the prior art can perform paper flattening operations, during the working process, the paper is flattened by the conveying roller and then conveyed. For thinner paper, excessive pressure may cause damage to the paper, thereby increasing the overall cost. Thinner paper is prone to wrinkles, which cause the wrinkles to be flattened, resulting in indentations on the surface of the paper, reducing the overall printing quality. In addition, the conveying rollers set need to be adjusted according to different types and thicknesses of paper, which makes the overall operation more complicated.

[0004] In view of the above problems, it is urgently necessary to carry out innovative design based on the original conveying device with flipping function of the printing machine and its use method. Therefore, we propose a conveying device with flipping function of the printing machine and its use method which can well solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a conveying device with a flipping function for a printing press and a method for using the same, so as to solve the problem raised in the above-mentioned background technology that in the current market, paper is conveyed after being flattened by conveying rollers. For thinner paper, excessive pressure may cause damage to the paper, thereby increasing the overall cost, and thinner paper is prone to wrinkles, which cause the wrinkles to be flattened, resulting in indentations on the surface of the paper, reducing the overall printing quality, and the conveying rollers need to be adjusted according to different types and thicknesses of paper, resulting in more complicated overall operation.

[0006] To achieve the above object, the present invention provides the following technical solution: a conveying device with a flipping function for a printing press and a method for using the same, comprising a conveying frame, a toothed roller is mounted on the conveying frame, a toothed block is meshedly connected to the side end of the toothed roller, and the toothed block is mounted on a conveyor belt; The tooth block is provided with a contact piece, the conveying frame is provided with a contact plate, the contact piece contacts with the contact plate after rotation, and the conveying frame is provided with a conveying member; The output end of the conveying member is connected to a second magnetic block, and the second magnetic block is installed inside the storage box. The side end of the storage box is connected to a flip seat through a flip assembly. A suction member is arranged inside the flip seat. A storage groove is provided on the flip seat, and a through groove is provided in the storage groove. The paper is adsorbed inside the storage groove by the cooperation of the suction member and the through groove.

[0007] Preferably, a cleaning component is provided at the side end of the storage box, and the cleaning component includes a bracket installed at the side end of the storage box, and an air delivery component is provided on the bracket. The air delivery component is connected to a cleaning component through a pipeline, and the cleaning component is located on the top of the flip seat.

[0008] Preferably, the flip assembly includes a rotating shaft installed at the side end of the storage box, one end of the rotating shaft is connected to the flip seat, and the other end of the rotating shaft is connected to the inside of the support block, and a sliding block is provided at the bottom of the support block.

[0009] Preferably, the slider is slidably connected inside a slide groove, the slide groove is opened inside a support plate, the support plate is arranged on the top of the storage box, a first magnetic block is arranged inside the storage box, and the first magnetic block is magnetically compatible with the second magnetic block.

[0010] Preferably, a driving assembly is installed on the support block, and the driving assembly includes a first gear installed on the side end of the support block, the first gear is connected to the other end of the rotating shaft, the first gear is adapted to the first gear rod, and the first gear rod is installed on the side end of the support plate.

[0011] Preferably, a moving block is provided on the support block, a sliding groove is provided on the moving block, a sliding rod is connected inside the sliding groove, and the sliding rod contacts the limiting groove after movement, the limiting groove is provided on the limiting member, and the limiting member is installed on the side end of the support plate.

[0012] Preferably, the driving assembly includes a limit plate installed at the bottom of the supporting block, the limit plate is connected to the bottom of the sliding block, a screw rod is connected through the inside of the sliding block, the screw rod is connected through the inside of the through hole, the through hole is provided at the side end of the storage box, a moving rod is connected through the inside of the limit plate, one end of the moving rod is connected to a third magnetic block, and the third magnetic block is magnetically compatible with the second magnetic block.

[0013] Preferably, a spring is sleeved on the outer side of the moving rod, a second gear rod is provided at the other end of the moving rod, a second gear is meshedly connected to the second gear rod, a rotating rod is provided inside the second gear, the rotating rod is connected to the rotating shaft through a connecting rope, and a torsion spring is sleeved on the outer side of the rotating shaft.

[0014] Preferably, a method for using a conveying device with a flipping function of a printing press comprises the following steps: S1: Equipment installation and transportation: Move the conveyor frame to the output end of the printing press, start the gear roller, and convey the printed paper through the conveyor belt; S2: Paper cleaning: Cleaning the paper surface by means of a cleaning component; S3: Paper receiving and flipping: Start the suction piece inside the flip seat to absorb the paper to ensure that the paper is flat and wrinkle-free. Use the flip assembly to drive the flip seat to rotate for easy later operation. S4: Restore the initial position: The flip seat rotates back to the initial position to receive again for transportation.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the conveying device with a flipping function of the printing press and the use method thereof adsorb the paper by cooperating with the suction piece and the through slot, so that the paper adsorption is more stable, which not only ensures that the paper remains flat during printing and reduces the problem of reduced printing quality caused by indentation, but also can adapt to various types and thicknesses of paper, thereby improving the utilization rate of paper. The specific contents are as follows: (1) The paper is adsorbed inside the storage slot by the cooperation of the suction piece and the through slot, making the paper adsorption more stable. This not only reduces the problem of reduced printing quality caused by indentation, but also can adapt to various types and thicknesses of paper, thereby improving production efficiency; (2) Open the air conveying parts to facilitate cleaning the surface of the conveyed paper through the cooperation of the pipeline and the cleaning parts, which not only reduces the problem of overall dust adhesion affecting the printing quality of the paper, but also reduces the problem of static electricity affecting the printing due to excessive dust, thus improving the overall practicality; (3) When the second magnetic block is powered on, the first magnetic block of the flip assembly can be easily moved, so that the support block can easily drive the flip seat to rotate through the rotating shaft inside the first gear, thereby reducing the problem of inconvenience in overall flipping caused by using a motor to drive the whole, and improving the overall service life; (4) When the second magnetic block is energized, the third magnetic block of the driving assembly moves through the second magnetic block, so that the third magnetic block drives the moving rod inside the limit plate to move, so that the spring is stretched, and the overall drive is the same, reducing the need to set up redundant drives and causing cost increases; (5) The second gear rod of the driving assembly conveniently drives the second gear to rotate, so that the rotating rod drives the rotating shaft to rotate through the connecting rope, which is convenient for flipping the paper. The overall flipping structure is simple and convenient, which improves the overall scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the transmission belt of the present invention; Figure 3 It is a schematic diagram of the overall top view structure of the present invention; Figure 4 It is a schematic diagram of the structure of the storage box and the flip seat of the present invention; Figure 5 This is a schematic diagram of the internal structure of the storage box of the present invention; Figure 6 It is a schematic diagram of the overall front view structure of the present invention; Figure 7 It is a schematic diagram of the structure of the conveying member and the storage box of the present invention; Figure 8 It is a schematic diagram of the screw and through-hole structure of the present invention; Fig. 9 This is a schematic diagram of the connection structure between the moving rod and the limiting plate of the present invention; Fig.10 It is a schematic diagram of the connection structure between the rotating shaft and the torsion spring of the present invention.

[0017] In the figure: 1, conveying frame; 2, gear roller; 3, gear block; 4, conveyor belt; 5, contact sheet; 6, contact plate; 7, conveying member; 8, storage box; 9, bracket; 10, gas transmission member; 11, pipeline; 12, cleaning member; 13, first magnetic block; 14, second magnetic block; 15, slider; 16, support plate; 17, slide groove; 18, support block; 19, first gear; 20, rotating shaft; 21, flip seat; 22, storage groove; 23, through groove; 24, first gear rod; 25, moving block; 26, sliding groove; 27, sliding rod; 28, limiting member; 29, limiting groove; 30, through hole; 31, screw; 32, limiting plate; 33, moving rod; 34, third magnetic block; 35, spring; 36, second gear rod; 37, second gear; 38, rotating rod; 39, connecting rope; 40, torsion spring. DETAILED DESCRIPTION

[0018] The following will be combined with the 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0019] Embodiment 1: In this embodiment, in order to improve the overall printing quality, the flip seat 21 is used to reduce the problem of reduced printing quality caused by indentation, such as Figure 1-Figure 4 The technical solution shown in the figure comprises a conveying frame 1, a gear roller 2 is installed on the conveying frame 1, a gear block 3 is meshed and connected at the side end of the gear roller 2, the gear block 3 is installed on the conveyor belt 4, a contact piece 5 is provided on the gear block 3, a contact plate 6 is installed on the conveying frame 1, and the contact piece 5 contacts the contact plate 6 after rotation, a conveying member 7 is provided on the conveying frame 1, a second magnetic block 14 is connected to the output end of the conveying member 7, and the second magnetic block 14 is installed inside the storage box 8, and the side end of the storage box 8 is connected to a flip seat 21 through a flip assembly, and a suction member is provided inside the flip seat 21, and a storage groove 22 is provided on the flip seat 21, and a through groove is provided in the storage groove 22 23, the paper is adsorbed inside the storage slot 22 by the cooperation of the suction piece and the through groove 23, a cleaning assembly is arranged at the side end of the storage box 8, and the cleaning assembly includes a bracket 9 installed at the side end of the storage box 8, and an air delivery piece 10 is arranged on the bracket 9, and the air delivery piece 10 is connected to the cleaning piece 12 through a pipeline 11, and the cleaning piece 12 is located on the top of the flip seat 21, and the conveying frame 1 is moved to the output end of the printing press, and the tooth roller 2 on the conveying frame 1 is rotated, so that the conveying belt 4 is conveyed through the cooperation of the tooth block 3, which is convenient for the conveying belt 4 to convey the printed paper, and is convenient for later processing. When the tooth block 3 provided with the contact sheet 5 is in contact with the contact plate 6 When the second magnetic block 14 in the storage box 8 is touched, the whole circuit is connected, which is convenient for energizing the second magnetic block 14 in the storage box 8 through the conveying member 7, which is convenient for driving operation, reducing the problem of increased cost caused by the need to set up an additional driving structure for operation, and opening the air conveying member 10 on the bracket 9, which is convenient for cleaning the surface of the conveyed paper through the cooperation of the pipeline 11 and the cleaning member 12, not only reducing the problem of overall dust adhesion causing the paper printing quality to be affected, but also reducing the problem of static electricity affecting printing due to the overall dust, improving the overall practicality, and the set flip seat 21 is convenient for receiving the paper conveyed by the conveyor belt 4, opening The suction piece inside the flip seat 21 allows the through groove 23 inside the storage groove 22 to absorb the paper, making the paper absorption more stable, which not only prevents the paper from being wrinkled during the transportation process, thereby ensuring that the paper remains flat during printing and reducing the problem of reduced printing quality due to indentation, but also the adsorption structure is convenient for adapting to various types and thicknesses of paper, making the overall operation simpler, improving production efficiency, reducing maintenance and damage replacement costs, and improving paper utilization. The flip assembly is used to drive the flip seat 21 to rotate, which is convenient for flipping the paper, facilitating later operations, and improving overall practicality.

[0020] Embodiment 2: In this embodiment, in order to improve the overall practicality, the flip assembly is used to reduce the problem of inconvenience caused by the use of a motor. Figure 1-Figure 5As shown, the flip assembly includes a rotating shaft 20 installed at the side end of the storage box 8, one end of the rotating shaft 20 is connected to the flip seat 21, and the other end of the rotating shaft 20 is connected to the inside of the support block 18. A slider 15 is arranged at the bottom of the support block 18, and the slider 15 is slidably connected to the inside of the slide groove 17. The slide groove 17 is opened in the support plate 16, and the support plate 16 is arranged at the top of the storage box 8. A first magnetic block 13 is arranged inside the storage box 8, and the first magnetic block 13 is magnetically compatible with the second magnetic block 14. A driving assembly is installed on the support block 18, and the driving assembly includes a first gear 19 installed at the side end of the support block 18, the first gear 19 is connected to the other end of the rotating shaft 20, the first gear 19 is compatible with the first gear rod 24, and the first gear rod 24 is installed at the side end of the support plate 16. A moving block 25 is arranged on the support block 18, and a sliding groove 26 is opened on the moving block 25. A sliding rod 27 is connected inside the sliding groove 26. After the sliding rod 27 moves, it contacts with the limiting groove 29, and the limiting groove 29 is opened The limiting member 28 is mounted on the side end of the support plate 16. When the second magnetic block 14 is energized, the first magnetic block 13 is conveniently moved, so that the slider 15 moves inside the slide groove 17 of the support plate 16, so that the support block 18 at the upper end moves stably, thereby improving the overall stability. The support block 18 is convenient for driving the flip seat 21 to rotate through the rotating shaft 20 inside the first gear 19, thereby improving the overall practicality. When the support block 18 drives the first gear 19 to move, so that the first gear 19 passes through the surface of the first gear rod 24, the cooperation between the first gear 19 and the first gear rod 24 facilitates the rotation of the rotating shaft 20, thereby reducing the problem of inconvenience caused by the use of a motor to drive the overall flipping. When the support block 18 moves to the side end of the limiting member 28, the moving block 25 is inserted into the limiting groove 29 of the limiting member 28 through the sliding rod 27 inside the sliding groove 26, so that the rotating shaft 20 drives the flip seat 21 to rotate stably, thereby improving the overall service life.

[0021] Embodiment three: In this embodiment, in order to reduce the overall cost, the drive components are used to reduce the problem of increased costs caused by the need to set up redundant drives. Figure 6-Figure 10As shown, the driving assembly includes a limit plate 32 installed at the bottom of the support block 18, the limit plate 32 is connected to the bottom of the slider 15, the slider 15 is connected with a screw rod 31 running through it, the screw rod 31 is connected to the inside of the through hole 30, the through hole 30 is opened at the side end of the storage box 8, the limit plate 32 is connected with a moving rod 33 running through it, one end of the moving rod 33 is connected to a third magnetic block 34, the third magnetic block 34 is magnetically compatible with the second magnetic block 14, a spring 35 is sleeved on the outside of the moving rod 33, and a second gear rod 36 is arranged at the other end of the moving rod 33, and a second gear 37 is meshed and connected to the second gear rod 36, and a rotating rod 38 is arranged inside the second gear 37, and the rotating rod 38 is connected to the rotating shaft 20 through a connecting rope 39, and a torsion spring 40 is sleeved on the outside of the rotating shaft 20, and the screw rod 31 passes through the slider 15 and the through hole 30 to fix it, so that the slider 15 can be fixed in the slide groove 1 of the support plate 16 7, the through hole 30 provided inside facilitates the adjustment of the position of the flip seat 21, so that the overall practicality is greatly improved, and it is convenient to effectively adjust according to the required position. When the second magnetic block 14 is energized, the third magnetic block 34 provided drives the moving rod 33 inside the limit plate 32 to move, so that the spring 35 is stretched, and the overall drive is the same, which reduces the problem of increased costs caused by the need to set up redundant drives. The second gear rod 36 provided on the other side of the moving rod 33 is convenient to drive the second gear 37 to rotate, so that the second gear 37 drives the rotating rod 38 to rotate, so that the rotating rod 38 drives the rotating shaft 20 to rotate through the connecting rope 39, so that the rotating shaft 20 drives the flip seat 21 to rotate stably, which is convenient for turning the paper, and the rotating shaft 20 rotates through the torsion spring 40, so that the whole returns to the initial position, which is convenient for the paper to be received again, and the overall application range is improved.

[0022] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A conveying device with a flipping function for a printing press, comprising a conveying frame (1), a toothed roller (2) being mounted on the conveying frame (1), a toothed block (3) being meshedly connected to a side end of the toothed roller (2), and the toothed block (3) being mounted on a conveying belt (4); It is characterized in that Also includes: The tooth block (3) is provided with a contact piece (5), the conveying frame (1) is provided with a contact plate (6), the contact piece (5) contacts the contact plate (6) after rotation, and the conveying frame (1) is provided with a conveying member (7); The output end of the conveying member (7) is connected to a second magnetic block (14), the second magnetic block (14) is installed inside the storage box (8), the side end of the storage box (8) is connected to a flip seat (21) through a flip assembly, a suction member is arranged inside the flip seat (21), a storage groove (22) is provided on the flip seat (21), a through groove (23) is provided inside the storage groove (22), and paper is adsorbed inside the storage groove (22) through the cooperation of the suction member and the through groove (23).

2. A conveying device with a flipping function for a printing press according to claim 1, characterized in that: A cleaning component is provided at the side end of the storage box (8), the cleaning component comprising a bracket (9) mounted at the side end of the storage box (8), an air delivery component (10) being provided on the bracket (9), the air delivery component (10) being connected to a cleaning component (12) via a pipeline (11), the cleaning component (12) being located on the top of the flip seat (21).

3. The conveying device with a flipping function for a printing press according to claim 1, characterized in that: The flip assembly comprises a rotating shaft (20) mounted on a side end of the storage box (8), one end of the rotating shaft (20) is connected to a flip seat (21), and the other end of the rotating shaft (20) is connected to the inside of a support block (18), and a slider (15) is provided at the bottom of the support block (18).

4. A conveying device with a flipping function for a printing press according to claim 3, characterized in that: The slider (15) is slidably connected inside a slide groove (17); the slide groove (17) is provided inside a support plate (16); the support plate (16) is arranged on the top of the storage box (8); a first magnetic block (13) is arranged inside the storage box (8); the first magnetic block (13) is magnetically compatible with the second magnetic block (14).

5. The conveying device with a flipping function for a printing press according to claim 3, characterized in that: A driving assembly is mounted on the support block (18), the driving assembly comprising a first gear (19) mounted on a side end of the support block (18), the first gear (19) being connected to the other end of the rotating shaft (20), the first gear (19) being matched with a first gear rod (24), and the first gear rod (24) being mounted on a side end of the support plate (16).

6. The conveying device with a flipping function for a printing press according to claim 3, characterized in that: The support block (18) is provided with a moving block (25), the moving block (25) is provided with a sliding groove (26), the sliding groove (26) is internally connected with a sliding rod (27), the sliding rod (27) contacts with a limiting groove (29) after movement, the limiting groove (29) is provided on a limiting member (28), and the limiting member (28) is mounted on a side end of the support plate (16).

7. The conveying device with a flipping function for a printing press according to claim 5, characterized in that: The driving assembly comprises a limit plate (32) mounted on the bottom of the support block (18), the limit plate (32) being connected to the bottom of the slider (15), the slider (15) having a screw rod (31) extending therethrough, the screw rod (31) extending therethrough and connected to the inside of a through hole (30), the through hole (30) being provided at a side end of the storage box (8), the limit plate (32) having a moving rod (33) extending therethrough and connected to the inside, one end of the moving rod (33) being connected to a third magnetic block (34), the third magnetic block (34) being magnetically compatible with the second magnetic block (14).

8. The conveying device with a flipping function for a printing press according to claim 7, characterized in that: A spring (35) is sleeved on the outer side of the moving rod (33); a second gear rod (36) is provided at the other end of the moving rod (33); a second gear (37) is meshingly connected to the second gear rod (36); a rotating rod (38) is provided inside the second gear (37); the rotating rod (38) is connected to the rotating shaft (20) via a connecting rope (39); and a torsion spring (40) is sleeved on the outer side of the rotating shaft (20).

9. A method for using the conveying device with a flipping function of a printing press according to claim 1, characterized in that: The steps include: S1: Equipment installation and transportation: The conveyor frame (1) is moved to the output end of the printing press, and the gear roller (2) is started to convey the printed paper through the conveyor belt (4); S2: Paper cleaning: Cleaning the paper surface by means of a cleaning component; S3: Paper receiving and flipping: The suction piece inside the turning seat (21) is activated to absorb the paper to ensure that the paper is flat and wrinkle-free, and the turning seat (21) is driven to rotate by the turning assembly to facilitate subsequent operations; S4: Restore the initial position: The turning seat (21) rotates back to the initial position to receive again, thereby conveying.

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