High-speed paper feeding device for flatbed printing press

Abstract

The present invention discloses a high-speed paper feeding device for a flatbed printing press, and the present invention relates to the technical field of paper feeding structures for printing presses. The high-speed paper feeding device for the flatbed printing press comprises a lifting frame, on which a paper feeding mechanism is installed, and a transfer mechanism is arranged on the side of the paper feeding mechanism close to the main body of the printing press, the paper feeding mechanism comprises a paper feeding unit and an adjustment unit, the adjustment unit comprises a middle base, and grooves for rotation are provided at both ends of the middle base, and L-shaped linkage plates are arranged in the grooves, and the linkage plates are fixedly installed on the corresponding rotating shafts, and the rotating shafts are rotationally connected with the corresponding middle bases through the grooves. The present invention rotates the linkage plate and the rotating shaft on the middle base, and the paper feeding unit installed on the linkage plate can be adjusted to a certain angle. When the paper is too long, the linkage plate and the rotating clamping plate are rotated at an angle to lengthen the length of the paper transmission, and the paper is prevented from dragging on the ground, and further provides a standardized and appropriate transmission operation for the paper feeding program.

Description

Technical Field

[0001] The invention relates to the technical field of paper feeding structures for printing presses, in particular to a high-speed paper feeding device for a flat printing press. Background Art

[0002] A machine for printing text and images. Modern printing presses are generally composed of mechanisms such as plate loading, inking, embossing, and paper feeding. Its working principle is: first, the text and image to be printed are made into a printing plate, which is then installed on the printing press. Then, the ink is applied to the places with text and images on the printing plate by humans or the printing press, and then directly or indirectly transferred to paper or other substrates, thereby replicating printed products identical to the printing plate. The invention and development of printing presses play an important role in the spread of human civilization and culture. With the development of science and technology and the progress of people's lives, people have higher and higher requirements for convenience in the development of things. The paper feeding mechanism of previous printing machines did not use parallel feeding, which resulted in people being unable to quickly and accurately connect the device when using it, and the work efficiency was low.

[0003] For example, a paper delivery mechanism for a printing machine disclosed in Chinese patent publication number CN211496145U can realize that the device has two flat plates by setting a first clamping plate and a second clamping plate, and a row of suction nozzles can be installed on the second clamping plate to suck the paper tail to ensure that the presser foot can blow air fully to separate the paper completely. By setting an eccentric wheel and a fulcrum plate, the device can have a deviation correction function by controlling the eccentric wheel during transportation. Moreover, this device is parallel paper feeding, and the sliding connection between two sliding blocks and the sliding rod makes the device more stable and suitable for high speed. The conjugate rocker arm is driven to move back and forth by the conjugate cam, and the conjugate rocker arm is equipped with bearings to move the paper delivery device back and forth.

[0004] First of all, the position of the conjugate cam in the mechanism is fixed, so the paper required for printing can only be transported flat during the transmission process. However, the paper is too long, so the mechanism needs to set up a transfer roller in the horizontal space to prevent the paper from dragging on the ground. In addition, in the process of adjusting the paper delivery speed, the swing amplitude of the cam structure needs to be changed, which involves uncertainty and instability. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a high-speed paper feeding device for a flatbed printing press, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention is implemented through the following technical scheme: a high-speed paper feeding device of a flatbed printing press, comprising a lifting frame, a paper feeding mechanism is installed on the lifting frame, and a transfer mechanism is arranged on the side of the paper feeding mechanism close to the printing press body, the paper feeding mechanism comprises a paper feeding unit and an adjustment unit, and the transfer mechanism receives the printing paper transmitted by the paper feeding unit and enters the printing press body;

[0007] The adjusting unit includes a middle base installed on the left and right ends of the lifting frame, and grooves for rotation are opened on the left and right ends of the two middle bases. An L-shaped linkage plate is arranged in each of the grooves, and each of the linkage plates is fixedly installed on the corresponding rotating shaft. Each of the rotating shafts is rotatably connected to the corresponding middle base through the grooves. A corresponding connecting block is welded at the middle of each linkage plate, and each connecting block is rotatably connected with an adjusting screw. Each adjusting screw has a corresponding threaded fixed column, and each fixed column is fixedly installed on the end face of the corresponding rotating clamping plate. The clamping part at the bottom of each rotating clamping plate is located at the protruding end of the adjacent linkage plate, and the paper feeding unit is symmetrically arranged on both sides of the middle base.

[0008] A further improvement of the technical solution of the present invention is that a connecting shaft is fixedly installed at the bottom of each rotating clamping plate, and each connecting shaft is rotatably connected to the corresponding linkage plate. A positioning rod is inserted into the side of the connecting shaft away from the rotating clamping plate through a socket, and the other end of the positioning rod is welded to the corresponding rotating member. The other end of the rotating member is rotatably installed in a fixed block welded to the lifting frame. The linkage plate rotates on the middle base through the rotating shaft, so the paper feeding unit installed on the linkage plate can be adjusted to a certain angle. When the paper is too long, the linkage plate and the rotating clamping plate are rotated at an angle to lengthen the length of paper transmission, avoid dragging of paper on the ground, and further provide standardized and appropriate transmission operations for the paper feeding program.

[0009] A further improvement of the technical solution of the present invention is that: the paper feeding unit includes an upper roller and a lower roller arranged between the rotating clamping plates, the upper roller and the lower roller are both rotatably connected to the rotating clamping plates at both ends, both sides of the upper roller and the lower roller are keyed with mutually meshing linkage gears, a paper delivery roller is rotatably installed between the two linkage plates, both ends of the paper delivery roller are keyed with transmission gears, each of the transmission gears is meshed with adjacent linkage gears, a middle roller is arranged between the two paper delivery rollers, the middle roller is rotatably installed on the middle base, and the middle roller is meshed with the transmission gear at the initial position through the middle gear, and the upper roller and the lower roller follow the rotating clamping The plate is rotated at an angle, thereby changing the height of the paper during paper transmission, the transmission angle and the length of the paper during transmission, so as to complete the adaptability adjustment according to the characteristics of the paper. Furthermore, the paper delivery roller on the upper roller side does not move when the rotating clamping plate is rotated, and when the linkage plate rotates, the paper delivery roller is still in a linkage state with the upper roller. Therefore, when the linkage plate is adjusted, the paper delivery roller is still in a transmission state, and the paper feeding speed does not drop significantly. Only when the rotating clamping plate is adjusted alone, the upper and lower rollers lose transmission. At this time, the paper delivery roller is solely responsible for the paper feeding operation, and the efficiency is reduced. This situation only applies to special cases where the paper is too short.

[0010] A further improvement of the technical solution of the present invention is that: the upper roller is provided with friction lines for increasing friction, a transmission structure is provided on one side of the middle roller, and the middle roller is transmission-connected to the transfer mechanism through the transmission structure.

[0011] A further improvement of the technical solution of the present invention lies in that: the transfer mechanism includes a transfer seat arranged on one side of the lifting frame, an upper transfer roller and a lower transfer roller are arranged above the transfer seat in sequence, and hollow tubes are respectively connected to the same side of the upper transfer roller and the lower transfer roller, and the two hollow tubes are connected to the same connecting pipe, and the other end of the connecting pipe is connected to a heat pipe, and the upper transfer roller, the lower transfer roller and the two rotating shafts are all hollow pipes, and seals are arranged at the connection between the upper transfer roller and the lower transfer roller and the rotating shaft. The arranged heat pipe fills high-temperature hot air into the upper transfer roller and the lower transfer roller to increase the temperature of the upper transfer roller and the lower transfer roller, thereby completing the contact with the paper surface when the paper is transmitted after the printing overprinting is completed, so that the drying operation is completed at both ends of the paper surface, and the corresponding drying is completed in the process of transferring the paper, ensuring dryness and avoiding the paper from dragging on the ground.

[0012] A further improvement of the technical solution of the present invention is that: the upper rotating roller and the lower rotating roller are rotatably connected to two hollow tubes respectively, the hollow tubes are detachably connected to the connecting pipe through a seal, the connecting pipe is welded to the heat pipe, friction particles are arranged in an array on the upper rotating roller and the lower rotating roller, and the two hollow tubes are arranged with conduction holes in an array on the axis inside the upper rotating roller and the lower rotating roller, wherein the lower rotating roller rotates when the paper is transmitted, and the upper rotating roller rotates automatically under the action of friction and the thrust generated by the movement of the paper, and multiple groups of conduction holes improve the preheating efficiency and the transmission efficiency.

[0013] A further improvement of the technical solution of the present invention is that: the transfer mechanism also includes a moving unit arranged on the transfer seat, and the moving unit includes a bracket frame symmetrically placed vertically on both sides of the transfer seat, and mounting blocks are respectively arranged at the upper and lower ends of the mounting grooves arranged in the two bracket frames, and each of the hollow tubes is arranged in the mounting block, and the upper and lower ends of the upper and lower rollers away from the hollow tubes are respectively fixedly connected with linkage shafts, and each of the linkage shafts is rotatably connected to the corresponding mounting block, and the other end of the linkage shaft connected to the lower roller is connected to the transmission structure through a coupling, and the position of the upper mounting block in the mounting groove is adjusted by rotating the adjusting screw, so as to change the distance between the upper roller and the lower roller, so that the device can be compatible with paper of different thicknesses, and the arranged lower roller can effectively improve the paper transmission speed during rotation, and the rotation direction of the transmission structure is the same as the transmission direction of the paper.

[0014] A further improvement of the technical solution of the present invention is that: the two upper end mounting blocks are connected with a rotating screw through a bearing, the rotating screw is threadedly connected to the bracket frame through an internal thread, a telescopic rod is fixedly connected between the two mounting blocks on the same side, and a reset spring is sleeved on the two telescopic rods.

[0015] Beneficial Effects

[0016] The present invention provides a high-speed paper feeding device for a flatbed printing press. Compared with the prior art, the present invention has the following beneficial effects:

[0017] The high-speed paper feeding device of the flatbed printing press rotates on the middle base through the linkage plate and the rotating shaft, so the paper feeding unit installed on the linkage plate can be adjusted to a certain angle. When the paper is too long, the linkage plate and the angle of the rotating clamping plate are rotated to lengthen the length of the paper transmission to avoid the paper dragging on the ground, and further provide a standardized and appropriate transmission operation for the paper feeding program, and the upper roller and the lower roller follow the rotating clamping plate to rotate the angle, thereby changing the height of the paper during paper transmission, the transmission angle and the length of the paper during transmission, so as to complete the adaptability adjustment according to the characteristics of the paper;

[0018] The heat pipe is used to fill the upper and lower transfer rollers with high-temperature hot air to increase the temperature of the upper and lower transfer rollers, so that the paper surface is contacted when the paper is transferred after printing and overprinting, so that both ends of the paper surface are dried, and the corresponding drying is completed during the transfer process of the paper, ensuring dryness and preventing the paper from dragging on the ground;

[0019] The lower transfer roller rotates during the paper transmission process, and the upper transfer roller rotates automatically under the action of friction and thrust generated by the movement of the paper. Multiple sets of conduction holes improve the preheating efficiency and transmission efficiency, and the screw is adjusted to rotate to adjust the position of the upper mounting block in the mounting groove, thereby changing the distance between the upper transfer roller and the lower transfer roller, so that the device can be compatible with papers of different thicknesses. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the high-speed paper feeding device of the flatbed printing machine;

[0021] Figure 2 It is a left side view of the high-speed paper feeding device of the flatbed printing machine;

[0022] Figure 3 It is a structural schematic diagram of the paper delivery mechanism in the high-speed paper feeding device of the flatbed printing machine;

[0023] Figure 4 It is a structural schematic diagram of an adjustment unit in a high-speed paper feeding device of the flatbed printing press;

[0024] Figure 5 This is a schematic diagram of the structure of the transfer mechanism in the high-speed paper feeding device of the flatbed printing press;

[0025] Figure 6 This is a schematic diagram of the structure of the moving unit in the high-speed paper feeding device of the flatbed printing machine;

[0026] Figure 7 This is a schematic diagram of the structure of the transfer mechanism in the high-speed paper feeding device of the flatbed printing machine.

[0027] In the figure: 100, lifting frame; 200, middle base; 201, linkage plate; 202, rotating shaft; 203, connecting block; 204, adjusting screw; 205, fixing column; 206, rotating clamping plate; 207, connecting shaft; 208, positioning rod; 209, rotating member; 210, fixing block; 301, upper roller; 302, lower roller; 303, linkage gear; 304, paper delivery roller; 305, transmission gear; 306, middle roller; 307, friction pattern; 308, transmission structure; 400, middle transfer seat; 401, upper transfer roller; 402, lower transfer roller; 403, hollow tube; 404, connecting pipe; 405, heat pipe; 406, friction particles; 407, conduction hole; 501, bracket frame; 502, mounting block; 505, rotating screw; 506, telescopic rod; 507, reset spring. DETAILED DESCRIPTION

[0028] 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.

[0029] The present invention provides two technical solutions:

[0030] Embodiment 1, refer to Figure 1 - Figure 7 The present invention provides a high-speed paper feeding device of a flatbed printing press, comprising a lifting frame 100, a paper feeding mechanism is installed on the lifting frame 100, and a transfer mechanism is arranged on a side of the paper feeding mechanism close to the printing press body, the paper feeding mechanism comprises a paper feeding unit and an adjustment unit, and the transfer mechanism receives the printing paper transmitted by the paper feeding unit into the printing press body;

[0031] The adjusting unit includes a middle base 200 installed on the left and right ends of the lifting frame 100. The left and right ends of the two middle bases 200 are provided with grooves for rotation. An L-shaped linkage plate 201 is arranged in each groove. Each linkage plate 201 is fixedly installed on the corresponding rotating shaft 202. Each rotating shaft 202 is rotatably connected to the corresponding middle base 200 through the groove. A corresponding connecting block 203 is welded at the middle part of each linkage plate 201. Each connecting block 203 is rotatably connected with an adjusting screw 204. Each adjusting screw 204 has a corresponding threaded fixed column 205. Each fixed column 205 is fixedly installed on the end face of the corresponding rotating clamping plate 206. The clamping part at the bottom of each rotating clamping plate 206 is located at the protruding end of the adjacent linkage plate 201. The paper feeding unit is symmetrically arranged on both sides of the middle base 200.

[0032] A connecting shaft 207 is fixedly installed at the bottom of each rotating clamping plate 206, and each connecting shaft 207 is rotatably connected to the corresponding linkage plate 201. A positioning rod 208 is inserted through a socket on the side of the connecting shaft 207 away from the rotating clamping plate 206. The other end of the positioning rod 208 is welded to the corresponding rotating member 209, and the other end of the rotating member 209 is rotatably installed in a fixed block 210 welded to the lifting frame 100. In this embodiment, the linkage plate 201 rotates on the middle base 200 through the rotating shaft 202, so the paper feeding unit installed on the linkage plate 201 can be adjusted to a certain angle. When the paper is too long, the linkage plate 201 and the rotating clamping plate 206 are rotated at an angle to lengthen the length of the paper transmission, avoid dragging the paper on the ground, and further provide a standardized and appropriate transmission operation for the paper feeding program.

[0033] The paper feeding unit includes an upper roller 301 and a lower roller 302 arranged between the rotating clamping plates 206. The upper roller 301 and the lower roller 302 are both rotatably connected to the rotating clamping plates 206 at both ends. Both sides of the upper roller 301 and the lower roller 302 are keyed with mutually meshing linkage gears 303. A paper delivery roller 304 is rotatably installed between the two linkage plates 201. Both ends of the paper delivery roller 304 are keyed with transmission gears 305. Each transmission gear 305 meshes with the adjacent linkage gears 303. A middle roller 306 is arranged between the two paper delivery rollers 304. The middle roller 306 is rotatably installed on the middle base 200, and the middle roller 306 meshes with the transmission gear 305 at the initial position through the middle gear. It should be noted that the upper roller 301 and the lower roller 302 follow the rotating clamping plates 206. The holding plate 206 is rotated at an angle, thereby changing the height of the paper during paper transmission, the transmission angle and the length of the paper during transmission, so as to complete the adaptability adjustment according to the characteristics of the paper. Furthermore, the paper delivery roller 304 on one side of the upper roller 301 does not move when the rotating clamping plate 206 is rotated, and when the linkage plate 201 is rotated, the paper delivery roller 304 is still in a linkage state with the upper roller 301. Therefore, when the linkage plate 201 is adjusted, the paper delivery roller 304 is still in a transmission state, and the paper feeding speed does not drop significantly. Only when the rotating clamping plate 206 is adjusted alone, the upper roller 301 and the lower roller 302 lose transmission. At this time, the paper delivery roller 304 is solely responsible for the paper feeding operation, and the efficiency is reduced. This situation only applies to special cases where the paper is too short.

[0034] The upper roller 301 is provided with friction lines 307 for increasing friction, a transmission structure 308 is provided on one side of the middle roller 306 , and the middle roller 306 is connected to the transfer mechanism through the transmission structure 308 .

[0035] In the second embodiment, the transfer mechanism includes a transfer seat 400 arranged on one side of the lifting frame 100, an upper transfer roller 401 and a lower transfer roller 402 are arranged above the transfer seat 400, and hollow tubes 403 are respectively connected to the same side of the upper transfer roller 401 and the lower transfer roller 402, and the two hollow tubes 403 are connected to the same connecting pipe 404, and the other end of the connecting pipe 404 is connected to the heat pipe 405. The upper transfer roller 401, the lower transfer roller 402 and the two hollow tubes 403 are all hollow tubes. Seals are provided at the connection between the upper roller 401 and the lower roller 402 and the hollow tube 403. In this embodiment, the heat pipe 405 is provided to fill high-temperature hot air toward the interior of the upper roller 401 and the lower roller 402 to increase the temperature of the upper roller 401 and the lower roller 402, thereby completing the contact with the paper surface when the paper is transmitted after the printing overprint is completed, so that the drying operation is completed at both ends of the paper surface, and the corresponding drying is completed in the process of transferring the paper, ensuring dryness and preventing the paper from dragging on the ground.

[0036] The upper rotating roller 401 and the lower rotating roller 402 are rotatably connected to the two hollow tubes 403 respectively. The hollow tube 403 is detachably connected to the connecting pipe 404 through a seal. The connecting pipe 404 is welded to the heat pipe 405. Friction particles 406 are arranged in an array on the upper rotating roller 401 and the lower rotating roller 402. The two hollow tubes 403 are located inside the upper rotating roller 401 and the lower rotating roller 402. Conductive holes 407 are arranged in an array on the axis. When the lower rotating roller 402 rotates during the transmission of paper, the upper rotating roller 401 rotates automatically under the action of friction and the thrust generated by the movement of the paper. Multiple groups of conductive holes 407 improve the preheating efficiency and the transmission efficiency.

[0037] The transfer mechanism also includes a moving unit arranged on the transfer seat 400, and the moving unit includes a support frame 501 symmetrically placed vertically on both sides of the transfer seat 400, and the upper and lower ends of the mounting grooves arranged in the two support frames 501 are respectively provided with mounting blocks 502, and each hollow tube 403 is arranged in the mounting block 502, and the upper transfer roller 401 and the lower transfer roller 402 are respectively fixedly connected with a linkage shaft at one end away from the hollow tube 403, and each linkage shaft is rotatably connected to the corresponding mounting block 502, and the other end of the linkage shaft connected to the lower transfer roller 402 is connected to the transmission structure 308 through a coupling. In this embodiment, the position of the upper end mounting block 502 in the mounting groove is adjusted by rotating the screw 505, so as to change the distance between the upper transfer roller 401 and the lower transfer roller 402, so that the device can be compatible with paper of different thicknesses, and the lower transfer roller 402 can effectively increase the paper transmission speed during rotation, and the rotation direction of the transmission structure 308 is the same as the paper transmission direction.

[0038] The two upper mounting blocks 502 are connected with a rotating screw 505 through a bearing, and the rotating screw 505 is threadedly connected to the bracket frame 501 through an internal thread. A telescopic rod 506 is fixedly connected between the two mounting blocks 502 on the same side, and a return spring 507 is sleeved on the two telescopic rods 506.

[0039] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-speed paper feeding device for a flatbed printing press, comprising a lifting frame (100), characterized in that: A paper delivery mechanism is installed on the lifting frame (100), and a transfer mechanism is arranged on a side of the paper delivery mechanism close to the printing machine body, the paper delivery mechanism comprises a paper feeding unit and an adjustment unit, and the transfer mechanism receives the printing paper transmitted by the paper feeding unit and enters the printing machine body; The adjustment unit comprises a middle base (200) mounted on the left and right ends of the lifting frame (100), the left and right ends of the two middle bases (200) are provided with grooves for rotation, each of the grooves is provided with an L-shaped linkage plate (201), each of the linkage plates (201) is fixedly mounted on a corresponding rotating shaft (202), each of the rotating shafts (202) is rotatably connected to the corresponding middle base (200) through the groove, a corresponding connecting block (203) is welded at the middle of each linkage plate (201), each of the connecting blocks (203) is rotatably connected to an adjusting screw (204), each of the adjusting screws (204) is correspondingly threadedly connected to a fixing column (205), each of the fixing columns (205) is fixedly mounted on the end surface of a corresponding rotating clamping plate (206), the clamping portion at the bottom of each rotating clamping plate (206) is located at the protruding end of an adjacent linkage plate (201), and the paper feeding unit is symmetrically arranged on both sides of the middle base (200); A connecting shaft (207) is fixedly installed at the bottom of each rotating clamping plate (206), and each connecting shaft (207) is rotatably connected to the corresponding linkage plate (201); a positioning rod (208) is inserted into the side of the connecting shaft (207) away from the rotating clamping plate (206) through a socket, and the other end of the positioning rod (208) is welded to the corresponding rotating member (209), and the other end of the rotating member (209) is rotatably installed in a fixed block (210) welded to the lifting frame (100); The paper feeding unit comprises an upper roller (301) and a lower roller (302) arranged between rotating clamping plates (206); the upper roller (301) and the lower roller (302) are both rotatably connected to the rotating clamping plates (206) at two ends; both sides of the upper roller (301) and the lower roller (302) are key-connected with mutually meshing linkage gears (303); a paper delivery roller (304) is rotatably installed between the two linkage plates (201); both ends of the paper delivery roller (304) are key-connected with transmission gears (305); each transmission gear (305) is meshed with an adjacent linkage gear (303); a middle roller (306) is arranged between the two paper delivery rollers (304); the middle roller (306) is rotatably installed on the middle base (200), and the middle roller (306) is meshed with the transmission gear (305) at an initial position via the middle gear.

2. The high-speed paper feeding device of a flat printing press according to claim 1, characterized in that: The upper roller (301) is provided with a friction pattern (307) for increasing friction, a transmission structure (308) is provided on one side of the middle roller (306), and the middle roller (306) is connected to the transfer mechanism through the transmission structure (308).

3. The high-speed paper feeding device of a flat printing press according to claim 2, characterized in that: The transfer mechanism comprises a transfer seat (400) arranged on one side of the lifting frame (100), an upper transfer roller (401) and a lower transfer roller (402) are arranged above the transfer seat (400), and hollow tubes (403) are respectively connected to the same side of the upper transfer roller (401) and the lower transfer roller (402), and the two hollow tubes (403) are both connected to the same connecting pipe (404), and the other end of the connecting pipe (404) is connected to a heat pipe (405), the upper transfer roller (401), the lower transfer roller (402) and the two hollow tubes (403) are all hollow tubes, and sealing members are provided at the connection between the upper transfer roller (401) and the lower transfer roller (402) and the hollow tube (403).

4. The high-speed paper feeding device of a flat printing press according to claim 3, characterized in that: The upper rotating roller (401) and the lower rotating roller (402) are respectively rotatably connected to two hollow tubes (403); the hollow tubes (403) are detachably connected to the connecting pipe (404) via a seal; the connecting pipe (404) is welded to the heat pipe (405); friction particles (406) are arranged in an array on the upper rotating roller (401) and the lower rotating roller (402); and conduction holes (407) are arranged in an array on the axes of the two hollow tubes (403) located inside the upper rotating roller (401) and the lower rotating roller (402).

5. The high-speed paper feeding device of a flat printing press according to claim 4, characterized in that: The transfer mechanism also includes a moving unit arranged on the transfer seat (400), and the moving unit includes a support frame (501) symmetrically placed vertically on both sides of the transfer seat (400), and the upper and lower ends of the installation grooves arranged in the two support frames (501) are respectively provided with installation blocks (502), and each of the hollow tubes (403) is arranged in the installation block (502), and the ends of the upper rotating roller (401) and the lower rotating roller (402) away from the hollow tube (403) are respectively fixedly connected with a linkage shaft, and each of the linkage shafts is rotationally connected to the corresponding installation block (502), and the other end of the linkage shaft connected to the lower rotating roller (402) is connected to the transmission structure (308) through a coupling.

6. The high-speed paper feeding device of a flat printing press according to claim 5, characterized in that: The two upper mounting blocks (502) are connected to a rotating screw (505) via a bearing, and the rotating screw (505) is threadedly connected to the support frame (501) via an internal thread. A telescopic rod (506) is fixedly connected between the two mounting blocks (502) on the same side, and a return spring (507) is sleeved on the two telescopic rods (506).

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