Paper conveying device and printing machine

Abstract

The present invention discloses a paper conveying device and a printing press to solve the technical problem that the existing printing roller is not conducive to inkjet printing. The present invention includes a sprocket, a chain, a narrow flat plate, and a paper conveying chain row. The chain is arranged as two parallel chains, each chain is connected in an annular manner, the sprocket is arranged in two groups, the sprocket and the chain are meshed and the chain is tensioned into an ellipse, the chain includes an extended chain pin, the paper conveying chain row is provided with a paper biting assembly, the narrow flat plate and the paper conveying chain row are fixedly connected by the extended chain pin and the chain, a plurality of narrow flat plates are arranged in parallel, the paper conveying chain row and its adjacent plurality of narrow flat plates constitute a printing mechanism, a plurality of printing mechanisms are arranged along the chain, and in the upper straight line section of the chain ellipse, the paper conveying chain row and the adjacent plurality of narrow flat plates are spliced ​​to form a large plane facing upward, which can be used as a working plane for inkjet printing. The beneficial technical effects of the present invention are: fast transmission speed, high precision, conducive to inkjet printing and combined use with conventional printing presses.

Description

Technical Field

[0001] The present invention relates to the technical field of printing presses, and in particular to a paper conveying device and a printing press. Background Art

[0002] Modern sheet-fed printing presses, except for special processes, are basically rotary structures. The printing operation is completed on the printing cylinder called the impression cylinder, such as offset printing, flexible printing, letterpress printing, gravure printing, etc. Other operations such as cleaning, UV curing, visual quality inspection, embossing, hot stamping, etc. can also be completed on the cylinder. Since the cylinder always rotates in one direction, it is very helpful to improve the machine operation speed and production efficiency.

[0003] With the development of digital inkjet technology, it has been increasingly promoted and applied in the printing industry. Although inkjet printing can be performed on rollers, it is not ideal because:

[0004] 1. The bottom surface of the nozzle is a flat structure, and often multiple rows of nozzle holes are arranged in parallel, while the surface of the drum is a curved surface. When the bottom surface of the nozzle is close to the drum surface, the multiple rows of nozzle holes cannot be on the generatrix of the bottom surface of the nozzle and the drum surface at the same time, and the distances from the generatrix are also different, resulting in different distances between the multiple rows of nozzle holes and the drum surface. This difference will lead to changes in printing quality;

[0005] 2. The best printing form for inkjet printing is to spray ink from top to bottom. When multi-color printing is completed on one drum, multiple groups of nozzles need to be arranged. Except for the nozzle group directly above, other nozzles need to be arranged at an angle, which is not conducive to the printing quality. When the number of colors is large, the nozzles at the edge have a larger inclination angle, which has a greater impact on the printing quality.

[0006] 3. Inkjet printing is a non-contact printing process. During the printing operation, the paper needs to be attached to the surface of the roller. However, the curved surface structure of the roller is not conducive to the attachment of the paper. In particular, the tail of the paper is prone to curling up, causing the print head to be scratched, resulting in printing waste and reducing the life of the print head.

[0007] 4. Conventional rotary printing presses print by line contact or very narrow belt contact, so they need to occupy very little space on the surface of the impression roller. However, inkjet printing requires a certain width on the surface of the impression roller. When printing in multiple colors, the printing area occupies a large space. The structure of conventional printing presses cannot meet the needs of inkjet printing. The usual solution is to increase the diameter of the impression roller or adopt a belt-type structure. The Chinese patent document with publication number CN110920243A discloses a belt conveyor for printing sheets, which conveys paper through an outer belt (6) and an inner belt (7). However, the belt for printing in the belt-type structure has large flexibility and poor manufacturing accuracy, resulting in poor printing quality and low speed. Increasing the diameter of the impression roller brings about significant cost increases and manufacturing difficulties. Both of the above methods are difficult to connect with existing printing presses to carry out a combination of multiple printing processes. Summary of the invention

[0008] The invention provides a paper conveying device and a printing press to solve the technical problem that the existing printing roller is not conducive to inkjet printing.

[0009] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0010] A paper conveying device is designed, including a sprocket, a chain, a narrow flat plate, and a paper conveying chain row. The chain is arranged in two parallel chains. The sprocket and the chain are meshed and connected. The chain includes an extended chain pin. The narrow flat plate and the paper conveying chain row are fixedly connected through the extended chain pin and the chain. A paper biting assembly is arranged on the paper conveying chain row. A plurality of narrow flat plates are arranged in parallel. The paper conveying chain row and its adjacent plurality of narrow flat plates constitute a printing mechanism. The sprocket drives the chain and the printing mechanism to operate. The chain in the chain transmission can rotate around the sprocket, or can move linearly in a non-sprocket part; the sprocket chain has sufficient rigidity and strength, and it is easy to improve the manufacturing accuracy; the length setting is flexible; and the running speed is fast. Two chains and corresponding sprockets for circular motion are arranged on the left and right sides of the printing machine, and the chain rotates on the sprocket.

[0011] The chain support method is adopted. First, the paper receiving chain in the conventional printing machine is designed as a narrow flat plate composed of a whole or parts, and the extended chain pins on the chains on both sides jointly support the narrow flat plate, and multiple narrow flat plates are arranged in sequence; second, the two side supports, paper biting tooth shaft, paper biting tooth, tooth pad, spring and bracket, swing arm, bearing and other structures and components of the paper receiving chain in the conventional printing machine are retained, and the original tooth pad support plate is designed to be half the width of the aforementioned narrow flat plate. The chain row with improved design is called a paper transfer chain row. In the linear operation stage of the chain, the half-width narrow flat plate of the paper transfer chain row and the multiple groups of narrow flat plates arranged in sequence are spliced ​​to form a large plane with a small long gap in the middle. The narrow flat plates can also be designed as a comb-like cross structure between each other and between the narrow flat plate and the half-width narrow flat plate of the paper transfer chain row to eliminate the small long gaps between each other. As needed, multiple sets of printing mechanisms can be set on the chain. The chains are connected in a ring shape. The sprocket tightens the above-mentioned chain and multiple sets of printing mechanisms to form an elliptical structure. The printing mechanism rotates at the sprocket position and is spliced ​​into a large plane and moves linearly at the straight line position of the ellipse. The large plane formed by the straight line segment on the upper part of the ellipse faces upward. The spliced ​​large plane can be used as a working plane, and the paper can be flattened for inkjet printing, UV curing, visual quality inspection, paper cleaning, dust removal, cold stamping and other printing operations. The length of the printing operation can be reasonably set by changing the number of the above-mentioned printing mechanisms.

[0012] Furthermore, the paper transfer chain row also includes a half-width narrow flat plate, and the paper biting assembly includes a paper biting tooth, a paper biting tooth shaft, and a tooth pad. The paper biting tooth is arranged on the paper biting tooth shaft, and the tooth pad is arranged on the half-width narrow flat plate. The paper biting tooth and the tooth pad cooperate to bite the paper, and the paper transfer chain row and the narrow flat plate together constitute a printing mechanism.

[0013] Furthermore, an outer straight guide rail is provided on the upper part of the chain, an inner straight guide rail is provided on the lower part of the chain, and an arc track is provided on the outer side of the sprocket. A side guide rail is provided on the side of the chain, and the chain is connected to a side gauge bearing through an extended chain pin. The side gauge bearing and the side guide rail are slidably matched to limit the left and right swing amplitude of the paper conveying chain row and the narrow plate.

[0014] Furthermore, the narrow flat plate is a hollow structure, with suction holes on its upper surface and ventilation holes on its lower surface. A long suction channel is provided below the ventilation holes, and the long suction channel is connected to a suction pump. When the half-width narrow flat plate of the paper conveying chain and the narrow flat plate pass over the long suction channel, the suction holes provided on the top are connected to the suction pump, and the suction holes generate downward airflow, which generates adsorption force on the paper on the printing mechanism, better attaches the paper to the working plane formed by the printing mechanism, and reduces the probability of the paper scratching the nozzle.

[0015] Furthermore, the sprocket includes a front sprocket and a rear sprocket, the chain connects the front sprocket and the rear sprocket, and the rear sprocket is connected to a power mechanism. The shaft ends of the front and rear sprockets are both provided with gears, the gear provided at the front receives power from the gear at the end of the preceding impression roller or the paper transfer roller, the front sprocket shaft transmits power to the rear sprocket shaft through the sprocket and the chain, and the gear at the end of the rear sprocket shaft transmits power to the gear at the end of the subsequent printing roller or the paper receiving roller. A separate power mechanism, such as a servo motor, is provided on the side of the gear at the end of the rear sprocket shaft, and the servo motor drives the gear to mesh with the gear at the end of the rear sprocket shaft to assist in increasing the power of the paper conveying device, or to drive the paper conveying device alone for shaftless transmission. When a shaftless transmission mechanism is used, the gear at the end of the front sprocket shaft should be removed to avoid meshing with the gear of the preceding impression roller or the paper transfer roller.

[0016] The second aspect of the present invention is to design a printing machine, including the above-mentioned paper conveying device and printing device, the printing device is a digital inkjet printing device, or a combination of a digital inkjet printing device and an offset printing device, a flexographic printing device, and a cold stamping printing device.

[0017] Compared with the prior art, the beneficial technical effects of the present invention are:

[0018] 1. The paper conveying chain row and multiple groups of narrow flat plates of the printing mechanism of the present invention together form a plane structure at the straight-line running position of the chain, which is particularly beneficial to the arrangement of the nozzles. The distances between the multiple rows of nozzle holes of a single nozzle and the printing plane are consistent. During multi-color printing, multiple groups of nozzles are arranged horizontally without tilting. The printing conditions of all nozzles and the nozzle holes above are consistent, which is more conducive to the printing quality.

[0019] 2. The planar structure of the present invention is more conducive to the flattening and attachment of paper, greatly reducing the probability of paper scratching the nozzle, effectively reducing printing waste, and increasing the service life of the nozzle.

[0020] 3. The spatial dimensions of the present invention are more flexible, and the length of the paper conveying device can be adjusted to the most reasonable working dimensions by adjusting the number of conveying chain rows and narrow flat plates.

[0021] 4. The structure, working diameter, height position, running speed, etc. of the front and rear sprocket mechanisms of the present invention are the same as those of the original paper delivery sprockets, and can be ideally connected with the printing unit and paper delivery part of a traditional printing press. The paper conveying device can be used as a separate inkjet printing operation platform, and can also be connected with a conventional printing press to carry out a combination of multiple printing processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front view of the paper conveying device of the present invention.

[0023] Figure 2 It is a top view of the paper conveying device of the present invention.

[0024] Figure 3 for Figure 1 Cross-sectional view in the AA direction.

[0025] Figure 4 for Figure 2 A partial enlarged view of part C.

[0026] Figure 5 This is a schematic diagram of the printing mechanism biting the paper.

[0027] Figure 6 Schematic diagram of the comb-shaped cross structure of the working plane.

[0028] Figure 7 It is a schematic diagram of a UV inkjet printer with a paper conveying device.

[0029] Figure 8 It is a schematic diagram of a water-based inkjet printer with a paper conveying device.

[0030] Fig. 9 It is a schematic diagram of a three-dimensional cold foil printing machine with a paper conveying device.

[0031] Fig.10 It is a schematic diagram of a digital combination printing machine with a paper conveying device.

[0032] In the figure, 01 paper feeder, 02 paper delivery device, 03 paper conveying device, 03a printing operation area, 04 flexographic glazing unit, 05 cold stamping unit, 06 offset printing unit, 07 paper delivery device, 701 subsequent transmission gear, 08 inkjet printing device, 09 drying device, 10 UV curing device, 11 visual quality inspection device, 12 paper feed pile, 12a single sheet of paper, 13 paper delivery pile, 201 preceding transmission gear, 301 base, 302 right frame, 303 left frame, 304 front sprocket mechanism, 304a front sprocket shaft, 304b front sprocket, 304c front transmission gear, 304d front tooth plate bracket, 304e front tooth plate, 304f front support shaft, 305 rear sprocket mechanism, 305a rear sprocket shaft, 305b rear sprocket, 305c rear transmission gear, 305d rear Teeth plate bracket, 305e rear tooth plate, 305f rear support shaft, 306 chain, 307 extended chain pin, 308 paper transfer chain row, 308a paper biting tooth, 308b tooth pad, 308c half-width narrow flat plate, 309 narrow flat plate, 310 copper sleeve, 311 sliding copper sleeve, 312 guide rail support, 313 inner straight guide rail, 314 outer straight guide rail, 315 arc guide rail, 316 side guide rail, 317 bearing support, 318 pin shaft, 319 spacer, 320 side gauge bearing, 321 long suction channel, 322 power mechanism, 322a servo motor, 322b motor gear, 322c motor support. DETAILED DESCRIPTION

[0033] The specific implementation modes of the present invention are described below in conjunction with the accompanying drawings and examples. However, the following examples are only used to illustrate the present invention in detail and do not limit the scope of the present invention in any way.

[0034] Embodiment 1: A paper conveying device, see Figures 1 to 4 The left frame 303 and the right frame 302 are fixed to the left and right sides of the base 301, and the front sprocket mechanism 304 and the rear sprocket mechanism 305 are respectively arranged at the front and rear ends of the frames. Taking the front sprocket mechanism 304 as an example, the center is the front sprocket shaft 304a, and the front sprocket shaft 304a is rotatably fixed to the left and right frames 303 and 302 through bearings. Two front sprockets 304b are fixed to the left and right ends of the front sprocket shaft 304a, and two rear sprockets 305b are fixed to the left and right ends of the rear sprocket shaft 305a. The front sprocket 304b and the rear sprocket 305b are both surrounded by the chain 306 and the chain is tightened, so that the chains 306 on both sides of the frame are tightened to form an elliptical structure, while ensuring that the positions of the chain links on the chains 306 on both sides are synchronized, and some chain pins on the chain 306 are replaced by extended chain pins 307, and the extended chain pins 307 are arranged at intervals on the chain 306, and support the paper conveying chain row 308 and the narrow flat plate 309 through the copper sleeve 310 and the sliding copper sleeve 311. The narrow flat plate 309 is an integrated or split structure, and the paper conveying chain row 308 The paper delivery chain structure is similar to that of a conventional printing press, and has left and right supports, an opening tooth swing arm, a pin shaft, a limit block, an opening tooth bearing, a paper-gripping tooth shaft, a paper-gripping tooth, a tooth pad, a spring support, a small sleeve and other structural parts. These structures are similar to the paper delivery chain structure of a conventional printing press, except that the shaft or support plate used as a tooth pad support is designed as a half-width narrow flat plate 308c similar to a narrow flat plate structure, on which a tooth pad 308b is installed. The tooth pad 308b and the paper-gripping tooth 308a bite the paper together, and the paper delivery chain 308 and the narrow flat plate 308c are connected. 09 can rotate around the sprockets 304b and 305b, but in the upper horizontal straight section of the ellipse where the chain 306 runs, the half-width narrow flat plate 308c of the paper conveying chain row 308 and multiple narrow flat plates 309 are spliced ​​into a large plane facing upwards. This large plane can become a working plane, providing paper support for printing or printing auxiliary work that does not require contact or has low pressure, such as inkjet printing, cleaning, dust removal, UV curing, heating and drying, visual quality inspection, cold stamping and other printing operations. The size of the working plane can be set according to the paper to be processed. The half-width narrow flat plate 308c and the narrow flat plate 309 are made of hard materials, and the width can be set according to the width of the paper. The number of narrow flat plates can be set according to the length of the paper. One paper conveying chain row 308 and n narrow flat plates 309 constitute one printing mechanism. One printing mechanism can form one working plane, which bites the schematic diagram of the paper 12a. Figure 5The length of the chain 306 occupied by one printing mechanism is one working perimeter. n working perimeters can be set as needed. The more printing mechanisms are set, the longer the straight line segment of the ellipse formed by the chain 306 will be. It can be seen that the length of the printing operation interval 3a can be flexibly set by changing the number of printing mechanisms.

[0035] The printing mechanism is composed of a paper conveying chain row 308 and a plurality of narrow flat plates 309. There are long gaps between the half-width narrow flat plate 308c and the narrow flat plate 309 in the paper conveying chain row 308, and between the narrow flat plates 309. The gaps are very small and do not affect the support of paper of a certain thickness. In order to reduce the influence of the long gaps on thinner paper, the half-width narrow flat plate 308c and the narrow flat plate 309 are optimally designed, such as Figure 6 As shown, the half-width narrow flat plate 308c and the narrow flat plate 309 are cross-jointed with each other in a comb-like manner, thereby eliminating the long gaps between them.

[0036] The front and rear sprocket mechanisms 304 and 305 are also provided with a front opening pressure plate 304e and a rear opening pressure plate 305e. The front opening pressure plate 304e is fixed on the front opening pressure plate bracket 304d. The front opening tooth plate bracket 304d is loosely sleeved on the front sprocket shaft 304a and fixed on the left frame 303. When the paper transfer chain row 308 rotates around the front sprocket 304b, the cam curve on the front opening tooth plate 304e drives the opening tooth bearing, opening tooth swing arm and paper biting tooth shaft on the unmarked paper transfer chain row 308, driving the paper biting tooth 308a to rotate to open and close to bite the paper 12a delivered by the paper biting tooth of the preceding paper transfer roller, and deliver the paper 12a to the printing operation area 3a. The rear opening pressure plate 305e is fixed on the rear opening pressure plate bracket 305d, and the rear opening tooth plate bracket 305d is empty on the rear sprocket shaft 305a and fixed on the left frame 303. When the paper transfer chain row 308 rotates around the rear sprocket 305b, the cam curve on the rear opening tooth plate 305e drives the opening tooth bearing, opening tooth swing arm, and paper biting tooth shaft on the unmarked paper transfer chain row 308, driving the paper biting tooth 308a to rotate and open, releasing the paper 12a it is biting, and transmitting the paper 12a to the paper biting tooth of the subsequent paper transfer roller.

[0037] The printing mechanism for printing operations requires certain static and operating precision. When the chain 306 runs in the printing operation section 3a, the chain 306 is clamped and run by the inner straight guide rail 313 and the outer straight guide rail 314, and the inner straight guide rail 313 and the outer straight guide rail 314 are fixed to the left and right frames 303 and 302 by the support 312. The structure is stable. Among them, the clearance between the inner straight guide rail 313 and the outer straight guide rail 314, the processing and assembly precision of the chain 306, the paper transfer chain row 308, the narrow plate 309, etc. can be precisely controlled. Therefore, the upper and lower precision of the printing mechanism can be guaranteed. The forward and backward movement accuracy of the printing mechanism depends on the accuracy of the above-mentioned components and sprockets 304b and 305b. The accuracy of sprockets 304b and 305b is guaranteed by the manufacturing process. At the same time, when the chain 306 rotates around the sprockets 304b and 305b, it is surrounded by an arc guide rail 315 on the outside. Therefore, the movement accuracy of the printing mechanism when it moves forward and backward can be guaranteed. It should be noted that the left and right positioning accuracy of the printing mechanism during operation. When the printing mechanism moves forward and backward, there must be a gap between the inner straight guide rail 313, the outer straight guide rail 314 and the chain plate of the chain 306. The left and right positioning accuracy of the printing mechanism cannot be guaranteed to be high by relying on the cooperation between the guide rails 313, 314 and the chain plate of the chain 306. When higher left and right positioning accuracy is required, it is necessary to add left and right positioning mechanisms: side guide rails 316, 316 are fixedly installed on the left and right frames 303, 302 respectively, and the extended chain pins 307 on the left and right sides of the chain 306 support the bearing seat 317 through the copper sleeve 310 and the sliding copper sleeve 311. The bearing seat 317 is fixedly installed with the side gauge bearing 320 through the pin shaft 318, the spacer sleeve 319, etc. The left and right positioning accuracy of the printing mechanism is accurately controlled by controlling the gap between the side gauge bearing 320 and the side guide rail 316 on both sides of the paper transfer chain row 308 and the narrow plate 309.

[0038] In order to make the paper 12a more closely attached to the printing mechanism, suction holes are provided on the half-width narrow flat plate 308c and the narrow flat plate 309 of the paper conveying chain row 308, and multiple ventilation holes are provided on the left and right sides below the half-width narrow flat plate 308c and the narrow flat plate 309. The ventilation holes are connected to the suction holes above through the cavity in the middle. Within the printing operation area 3a, the half-width narrow flat plate 308c and the narrow flat plate 309 of the paper conveying chain row 308 are correspondingly provided below the long suction channels 32 having the same number of ventilation holes as the half-width narrow flat plate 308c and the narrow flat plate 309 of the paper conveying chain row 308. 1. Long suction holes are provided above the long suction channel 321 and the ventilation holes of the half-width narrow flat plate 308c and the narrow flat plate 309, and ventilation holes are provided below the long suction channel 321 and connected to the suction pump. When the half-width narrow flat plate 308c and the narrow flat plate 309 of the paper conveying chain row 308 pass over the long suction channel 321, the suction holes provided thereon are connected to the suction pump, and the suction holes generate downward airflow, which generates adsorption force on the paper 12a on the printing mechanism, so that the paper 12a is better attached to the working plane formed by the printing mechanism, which is more conducive to printing operations such as inkjet printing.

[0039] Front and rear transmission gears 304c and 305c are arranged at the ends of the sprocket shafts 304a and 305a of the front and rear sprocket mechanisms 304 and 305. The front transmission gear 304c receives power from the front transmission gear 201 at the end of the front impression cylinder or the paper transfer cylinder. The front sprocket shaft 304a transmits power to the rear sprocket shaft 305a through the front sprocket 304b, the chain 306, and the rear sprocket 305b. The rear transmission gear 305c at the end of the rear sprocket shaft transmits power to the rear transmission gear 701 at the end of the rear printing cylinder or the paper receiving cylinder. An independent power mechanism 322 is preferably arranged on the side of the rear transmission gear 305c. The power mechanism 322 is preferably arranged as a servo motor 322a and an end motor gear 322b, and is fixedly installed on the left frame 303 through a motor support 322c. The motor gear 322b is meshed with the rear transmission gear 305c. The power mechanism 322 can assist in increasing the power of the paper conveying device 03. Alternatively, the power mechanism 322 can independently drive the paper conveying device 03, and the power between the preceding printing device and the succeeding printing device or the paper receiving part is shaftless transmission. When a shaftless transmission mechanism is adopted, the front transmission gear 304c should be cancelled to avoid meshing with the preceding impression roller or paper transfer roller gear 201.

[0040] The structure of the front and rear sprocket mechanisms is basically consistent with the structural performance, size and position of the paper delivery sprocket mechanisms of conventional printing presses, and is also the same as the working diameter of the paper transfer roller of a conventional printing press, which is equivalent to the front and rear two paper transfer rollers. Therefore, the paper conveying device can achieve perfect docking with conventional printing presses, and can perfectly realize the online production of inkjet printing and paper cleaning, dust removal, varnish coating, offset printing, cold stamping, UV curing, heating and drying, visual quality inspection and other processes.

[0041] Example 2: UV inkjet printer, such as Figure 7 As shown, the paper 12a is separated from the paper pile 12 by the paper feeder 01 and transported to the paper delivery device 02 in sequence. The paper delivery device 02 positions the front and side edges of the paper 12a and then transports it to the paper conveying device 03. The printing mechanism of the paper conveying device 03 bites and flattens the paper and transports it backward through the bottom of the inkjet printing device 08. The inkjet printing device 08 performs UV inkjet printing on the paper 12a, and then hands the paper 12a to the paper receiving device 07. The unmarked paper receiving chain row of the paper receiving device 07 bites the paper and transports it backward. When passing through the UV curing device 10, the UV ink on the paper 12a is cured, and then the paper 12a is transported to the top of the paper receiving pile 13 and the paper 12a is released. The paper 12a falls into the paper receiving pile 13 and is neatly arranged, completing the UV printing of the paper.

[0042] Example 3: Aqueous inkjet printer, such as Figure 8 As shown, since water-based ink has a weak adsorption capacity for smooth-surfaced paper such as coated paper, white cardboard, etc., it is necessary to coat the paper before printing. Therefore, a flexographic glazing unit 04 is added before inkjet printing. The printing process is the same as that of Example 1, except that for water-based ink, the UV curing device 10 in Example 2 is replaced by a drying device 09.

[0043] Example 4: 3D cold foil printing machine, such as Fig. 9 As shown, the inkjet printing device 08 applies a large amount of UV varnish to the paper 12a to form a thick varnish pattern on the paper. The UV curing device cures the varnish pattern. Then the drying device 09 heats the varnish pattern and adheres the cold foil film to the surface of the varnish pattern to form a gorgeous decorative effect. This is a task that cannot be accomplished on a conventional printing press.

[0044] Example 5: Digital combination printing press, such as Fig.10 As shown, the paper conveying device 03 is connected to the conventional offset printing unit 06, and the paper conveying device is equipped with an inkjet printing device 08 and a UV curing device 10 to achieve the combined production of batch and digital personalized printing.

[0045] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. However, those skilled in the art will appreciate that, without departing from the spirit of the present invention, the specific parameters in the above embodiments may be changed to form a plurality of specific embodiments, which are all within the common variation range of the present invention and will not be described in detail herein.

Claims

1. A paper conveying device, characterized in that: It includes a sprocket, a chain, a narrow flat plate, and a paper conveying chain row, wherein the chains are arranged in two parallel lines, and the sprockets are arranged in two front and rear lines on each chain, the sprockets mesh with the chains and tension the chains, the chains include an extended chain pin, the paper conveying chain row includes a paper biting assembly, the narrow flat plate and the paper conveying chain row are connected to the chains through the extended chain pin, a plurality of the narrow flat plates are arranged in parallel, the paper conveying chain row and the plurality of adjacent narrow flat plates constitute a printing mechanism, and the sprocket drives the chains and the printing mechanism to operate; The paper conveying chain row also includes a half-width narrow flat plate, the paper biting assembly includes a paper biting tooth, a paper biting tooth shaft, and a tooth pad, the paper biting tooth is arranged on the paper biting tooth shaft, the tooth pad is arranged on the half-width narrow flat plate, the paper biting tooth and the tooth pad cooperate to bite the paper, and the half-width narrow flat plate and a plurality of the narrow flat plates can be spliced ​​to form a working plane; The narrow flat plates are cross-jointed with each other and with the half-width narrow flat plate through comb-shaped notches to form a working plane.

2. The paper conveying device according to claim 1, characterized in that: An outer straight guide rail is arranged on the upper part of the chain, an inner straight guide rail is arranged on the lower part of the chain, and an arc track is arranged on the outer side of the sprocket.

3. The paper conveying device according to claim 1, characterized in that: A side guide rail is provided on the side of the chain, and the chain is connected to a side guide bearing through the extended chain pin, and the side guide bearing and the side guide rail are slidably matched.

4. The paper conveying device according to claim 1, characterized in that: The narrow flat plate and the half-width narrow flat plate are hollow structures, the upper surfaces thereof are provided with air suction holes, the lower surfaces thereof are provided with air vents, and a long air suction channel is provided below the air vents.

5. The paper conveying device according to claim 1, characterized in that: The sprockets include a front sprocket and a rear sprocket, the chain connects the front sprocket and the rear sprocket, and the rear sprocket is connected with a power mechanism.

6. A printing press, characterized in that: It comprises the paper conveying device as described in claim 1, and also comprises a printing device, wherein the printing device is a digital inkjet printing device, or the printing device is a combination of a digital inkjet printing device and one or more of an offset printing device, a flexographic printing device, and a cold stamping printing device.

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