A conveying structure of a decorative paper gravure printing machine

Abstract

The present invention provides a transmission structure of a decorative paper gravure printing machine, which relates to the field of conveying devices and comprises a center frame, wherein movable seats are arranged on both sides of the center frame, and vertical frames are fixed on both sides of the top of the movable seats, wherein sliders are slidably connected inside the vertical frames, and mounting plates are slidably connected inside the two sides of the center frame, and transmission components are installed on the surfaces of the mounting plates and the sliders, wherein the transmission components comprise a driving shaft, and a driving shaft is rotatably installed between two sliders on the top of the movable seat through bearings, and two groups of movable seats can be moved away from the center frame by an unfolding component, and a belt is limited by a limiting shaft rod on the center frame, and the tightness of the belt can be maintained after the distance between the two driving shafts is changed, so that the belt is suitable for conveying raw materials of various lengths, and the transmission component can be rotated and tilted at a certain angle under the drive of the lifting component, corresponding to the position of the printing press delivery inlet, so as to meet the use of printing presses of different heights.

Description

Technical Field

[0001] The invention relates to the field of conveying devices, in particular to a conveying structure of a decorative paper gravure printing machine. Background Art

[0002] The working principle of a printing press is: first, the text and images to be printed are made into a printing plate and installed on the printing press. Then, ink is applied to the places with text and images on the printing plate manually or by a printing press. Then, the ink is directly or indirectly transferred to paper or other substrates (such as textiles, metal plates, plastics, leather, wood boards, glass and ceramics), thereby replicating a printed product identical to the printing plate. A gravure printing press is often used for printing decorative paper. The decorative paper is first placed on a conveyor device, which then transports the decorative paper to the printing press for printing.

[0003] Common conveying devices include conveyor belts. When used, the conveying length of the prior art conveying device cannot be adjusted due to its own influence, which results in that when conveying different decorative paper raw materials, the longer decorative paper cannot be fully unfolded, and the angle of the conveying device cannot be adjusted according to the height of the printing press inlet, resulting in inconvenience in use. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a transmission structure of a decorative paper gravure printing machine to solve the problems raised in the above-mentioned background technology. The present invention has a novel structure. The two groups of movable seats can be moved away from the center frame by unfolding the components. The belt is limited by the limiting shaft on the center frame. After the distance between the two driving shafts is changed, the tightness of the belt can be maintained, so that it is suitable for conveying raw materials of various lengths. Driven by the lifting component, the transmission component can be rotated and tilted at a certain angle, corresponding to the position of the printing press feed inlet, to meet the use of printing presses at different heights.

[0005] In order to achieve the above-mentioned object, the present invention is realized by the following technical scheme: a transmission structure of a decorative paper gravure printing machine, comprising a center frame, a movable seat is provided on both sides of the center frame, and vertical frames are fixed on both sides of the top of the movable seat, a slider is slidably connected inside the vertical frame, and a mounting plate is slidably connected inside the two sides of the center frame, and a transmission assembly is installed on the surface of the mounting plate and the slider, the transmission assembly comprises a driving shaft, a driving shaft is rotatably installed between two sliders on the top of the movable seat through a bearing, two groups of limiting shaft rods are rotatably installed between the two mounting plates through a bearing, a belt is sleeved on the top of the driving shaft, and the lower end of the belt passes around between the two limiting shaft rods, an unfolding assembly is provided on the outside of the center frame, and the unfolding assembly comprises a telescopic plate, and the telescopic plate is slidably installed on the surface of the center frame on both sides of the mounting plate, and the extended end of the telescopic plate is connected to one side of the vertical frame, and a lifting assembly is provided at one end of the vertical frame corresponding to the telescopic plate, and the lifting assembly comprises a screw, and a screw is rotatably installed at the position of the vertical frame corresponding to the extended end of the telescopic plate through a bearing, and the extended end of the telescopic plate is connected to the screw.

[0006] Furthermore, the transmission assembly also includes a sliding rod, and sliding rods are fixed inside both sides of the vertical frame and the center frame, and the slider and the mounting plate are slidably connected to the corresponding sliding rods, a return spring is connected on the surface of the sliding rod, and the top of the return spring is fixedly connected to the slider and the mounting plate.

[0007] Furthermore, limit plates are provided on both sides of the top of the driving shaft, a bidirectional screw is rotatably installed between the two sliders on the top of the moving seat through bearings, and the bottom of the limit plate is threadedly sleeved on both ends of the bidirectional screw.

[0008] Furthermore, a first motor is fixed on the surface of the slider at the rear end of the center frame, and the output end of the first motor is fixedly connected to the drive shaft. The slider is located on the surface of the bottom of the drive shaft and is rotatably connected to a guide rod through a bearing, and the belt passes through the bottom of the drive shaft and the bottom of the guide rod.

[0009] Furthermore, the unfolding assembly also includes a horizontal plate, horizontal plates are provided on both outer sides of the center frame, and four groups of transmission gears are rotatably installed on the surface of the horizontal plate through bearings, and a second motor is fixed to a position of the horizontal plate corresponding to a transmission gear, the output end of the second motor is fixedly connected to the transmission gear, and the adjacent transmission gears are meshingly connected, one end of the telescopic plate is rotatably installed on the horizontal plate through a bearing, and a driven gear is sleeved on the position where the telescopic plate is rotatably installed, and the driven gear is meshingly connected to the outermost transmission gear.

[0010] Furthermore, the center frame is provided with a first sliding groove on both sides of the mounting plate, and the vertical frame is provided with a second sliding groove at a position corresponding to the screw, and sliding seats are slidably connected inside the first sliding groove and the second sliding groove, and arc frames are fixed on the outer surfaces of the sliding seats on both sides of the mounting plate of the center frame, and the centers of the two groups of arc frames are the same as the center of the horizontal plate, and the two ends of the horizontal plate are slidably connected inside the arc frames.

[0011] Furthermore, the lifting assembly also includes a third motor, the screw is installed inside the second slide groove, the third motor is fixed at the position corresponding to the screw on the top of the vertical frame, and the output end of the third motor is fixedly connected to the screw, the slide seat is threadedly sleeved on the screw surface of the second slide groove, and the other end of the telescopic plate is rotatably connected to the slide seat of the second slide groove through a rotating shaft.

[0012] Furthermore, an electric push rod is fixed on the outer surface of the slide seat of the second slide groove, a socket is fixed on the outer surface of the sliding block, and the extended end of the electric push rod can be inserted into the socket.

[0013] Furthermore, a cloth stopper is connected between the limit plates on both sides of the center frame, a winding box is installed on the side of the limit plate facing the cloth stopper, and both ends of the cloth stopper are wound inside the winding box of the limit plate through a winding shaft and a torsion spring.

[0014] Furthermore, the bottom of the central frame is provided with four groups of support columns, and the four corners of the bottom of the movable seat are provided with self-locking wheels.

[0015] Beneficial effects of the present invention:

[0016] 1. The present invention starts the electric push rod to drive the plug column to be inserted into the socket, completes the connection between the slide seat and the slider inside the second slide groove, starts the third motor to drive the screw to rotate, the slide seat engages with the screw and descends along the second slide groove, the slider descends synchronously, and the two sets of drive shafts descend to adjust the horizontal height of the top conveying of the belt.

[0017] 2. The present invention drives a transmission gear to rotate through a second motor, and four groups of transmission gears mesh with each other and then with the driven gear, driving the two telescopic plates to rotate synchronously in opposite directions. The slide seat at the extended end of the telescopic plate slides along the inside of the second slide groove, and the slide seat on the back of the arc frame slides along the first slide groove. During this process, the adjustment of the lifting assembly is coordinated, that is, the rotation of the screw rod and the transmission of the gear are carried out synchronously, so that the telescopic plate is moved to the highest point of the first slide groove and the second slide groove, which is convenient for connection with the slider.

[0018] 3. When adjusting the inclination angle of the two driving shafts, the two screws of the present invention respectively drive the slider and the driving shaft to move in different directions. At this time, the telescopic plate rotates, and the horizontal plate slides along the arc frame. Because the center of rotation of the telescopic plate is located at the center of the horizontal plate, and the center of the arc frame and the center of the horizontal plate are at the same point, there will be no movement interference, and the connection between the telescopic plate and the sliding seat is maintained. The moving seat moves away from the center frame through the self-locking wheel at the bottom, and is locked in position by the self-locking wheel after moving to the specified position.

[0019] 4. The present invention drives the driving shaft to rotate through the first motor, and the belt reciprocates along the two driving shafts and the limiting shaft rod to convey the product. Under the action of the guide rod, the belt passing through the bottom of the driving shaft is limited to maintain a sufficient wrapping area of ​​the belt on the driving shaft to enable rotational cooperation.

[0020] 5. The present invention drives the two limit plates to move by rotating the bidirectional screw rod, and adjusts the spacing between the limit plates according to the width of the conveyed decorative paper. After the two groups of movable seats are unfolded, the middle area is shielded by the rolled-up blocking cloth.

[0021] 6. Compared with the prior art, the present invention can move the two groups of movable seats away from the center frame through the unfolding components, and limit the belt through the limiting shaft on the center frame. After the distance between the two driving shafts is changed, the tightness of the belt can be maintained, so it is suitable for conveying raw materials of various lengths. Driven by the lifting component, the transmission component can be rotated and tilted at a certain angle, corresponding to the position of the printing press delivery port, to meet the use of printing presses at different heights. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of a transmission structure of a decorative paper gravure printing machine of the present invention;

[0023] Figure 2 It is a schematic diagram of the expansion of a moving base of a conveying structure of a decorative paper gravure printing machine of the present invention;

[0024] Figure 3 It is a schematic diagram of the connection between the unfolding assembly and the side frame of the conveying structure of a decorative paper gravure printing machine of the present invention;

[0025] Figure 4 It is a schematic diagram of the outer structure of a driving shaft of a transmission structure of a decorative paper gravure printing machine according to the present invention;

[0026] Figure 5 It is a schematic diagram of the unfolded component structure of a conveying structure of a decorative paper gravure printing machine of the present invention;

[0027] Figure 6 It is a schematic diagram of the distribution of transmission components of a transmission structure of a decorative paper gravure printing machine of the present invention;

[0028] Figure 7 The present invention is a schematic diagram of the connection between a lifting assembly and a slider of a conveying structure of a decorative paper gravure printing machine.

[0029] In the figure: 1. center frame; 11. first slide groove; 12. mounting plate; 2. moving seat; 21. vertical frame; 22. slide rod; 23. reset spring; 24. slider; 25. second slide groove; 26. self-locking wheel; 27. two-way screw rod; 28. limit plate; 29. ​​cloth stop; 210. guide rod; 3. transmission assembly; 31. belt; 32. first motor; 33. limit shaft rod; 34. drive shaft; 4. unfolding assembly; 41. horizontal plate; 42. second motor; 43. transmission gear; 44. driven gear; 45. telescopic plate; 46. arc frame; 5. lifting assembly; 51. screw rod; 52. third motor; 53. slide seat; 54. electric push rod; 55. socket. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0031] See also Figures 1 to 7The present invention provides a technical solution: a transmission structure of a decorative paper gravure printing machine, comprising a central frame 1, a movable seat 2 is arranged on both sides of the central frame 1, and vertical frames 21 are fixed on both sides of the top of the movable seat 2, and sliders 24 are slidably connected inside the vertical frames 21, and mounting plates 12 are slidably connected inside the two sides of the central frame 1, and transmission components 3 are installed on the surfaces of the mounting plates 12 and the sliders 24, and the transmission components 3 include a driving shaft 34, a driving shaft 34 is rotatably installed between the two sliders 24 on the top of the movable seat 2 through a bearing, and two groups of limiting shaft rods 33 are rotatably installed between the two mounting plates 12 through bearings, a belt 31 is sleeved on the top of the driving shaft 34, and the lower end of the belt 31 passes around between the two limiting shaft rods 33, an unfolding component 4 is arranged on the outer side of the central frame 1, and the unfolding component 4 includes a telescopic plate 45, and the central frame 1 is provided with a plurality of movable seats 24, wherein the movable seats 24 are ... A telescopic plate 45 is slidably installed on the surface of the core frame 1 on both sides of the mounting plate 12, and the extended end of the telescopic plate 45 is connected to one side of the vertical frame 21. The vertical frame 21 is provided with a lifting assembly 5 at one end corresponding to the telescopic plate 45. The lifting assembly 5 includes a screw 51. The vertical frame 21 is rotatably installed with a screw 51 at the position corresponding to the extended end of the telescopic plate 45 through a bearing. The extended end of the telescopic plate 45 is connected to the screw 51. When the device is used, the center frame 1 is fixed at a position near the gravure printing press. The two movable seats 2 and the drive shaft 34 are unfolded by the unfolding assembly 4 according to the length of the decorative paper to be put on. By moving the limiting shaft 33, the length of the upper end of the belt 31 is lengthened. Facing the feeding position of the printing press at different heights, the position of the two drive shafts 34 is adjusted by the lifting assembly 5 so that the upper end of the belt 31 is inclined to transport the decorative paper.

[0032] In this embodiment, the transmission assembly 3 also includes a slide bar 22, and the slide bars 22 are fixed inside both sides of the vertical frame 21 and the center frame 1, and the slider 24 and the mounting plate 12 are slidably sleeved on the corresponding slide bars 22, and a return spring 23 is sleeved on the surface of the slide bar 22, and the top of the return spring 23 is fixedly connected to the slider 24 and the mounting plate 12, and the slider 24 and the mounting plate 12 installed on the driving shaft 34 and the limiting shaft 33 slide along the slide bar 22, and are also limited by the elastic force of the return spring 23, so as to maintain the tension of the belt 31.

[0033] In this embodiment, limit plates 28 are provided on both sides of the top of the driving shaft 34, and a bidirectional screw 27 is rotatably installed between the two sliders 24 on the top of the movable seat 2 through a bearing, and the bottom of the limit plate 28 is threadedly sleeved on the two ends of the bidirectional screw 27, and a blocking cloth 29 is connected between the limit plates 28 on both sides of the center frame 1, and a winding box is installed on the side of the limit plate 28 facing the blocking cloth 29, and the two ends of the blocking cloth 29 are wound inside the winding box of the limit plate 28 through a winding shaft and a torsion spring, and the two-way screw 27 is rotated to drive the two limit plates 28 to move, and the spacing between the limit plates 28 is adjusted according to the width of the conveyed decorative paper. After the two groups of movable seats 2 are unfolded, the middle area is blocked by the wound blocking cloth 29.

[0034] In this embodiment, a first motor 32 is fixed on the surface of the slider 24 at the rear end of the center frame 1, and the output end of the first motor 32 is fixedly connected to the drive shaft 34. The slider 24 is located on the surface of the bottom of the drive shaft 34 and is rotatably connected to the guide rod 210 through a bearing, and the belt 31 passes through the bottom of the drive shaft 34 and the bottom of the guide rod 210. The first motor 32 drives the drive shaft 34 to rotate, and the belt 31 reciprocates along the two drive shafts 34 and the limiting shaft rod 33 to convey the product. Under the action of the guide rod 210, the belt 31 passing through the bottom of the drive shaft 34 is limited to keep the belt 31 with sufficient wrapping area on the drive shaft 34 to enable rotational cooperation.

[0035] In this embodiment, the unfolding assembly 4 also includes a transverse plate 41, and the transverse plates 41 are provided on both outer sides of the center frame 1, and four groups of transmission gears 43 are rotatably installed on the surface of the transverse plate 41 through bearings, and a second motor 42 is fixed to the position of the transverse plate 41 corresponding to a transmission gear 43, and the output end of the second motor 42 is fixedly connected to the transmission gear 43, and the adjacent transmission gears 43 are meshed and connected, and one end of the telescopic plate 45 is rotatably installed on the transverse plate 41 through a bearing, and the position where the telescopic plate 45 is rotatably installed is sleeved with a driven gear 44, and the driven gear 44 is connected to the outermost transmission gear 43. The center frame 1 is meshed and connected. The first slide groove 11 is opened on both sides of the mounting plate 12. The second slide groove 25 is opened at the position of the vertical frame 21 corresponding to the screw 51. The first slide groove 11 and the second slide groove 25 are slidably connected with the slide seat 53. The center frame 1 is fixed with an arc frame 46 on the outer surface of the slide seat 53 on both sides of the mounting plate 12. The center of the two groups of arc frames 46 is the same as the center of the horizontal plate 41. The two ends of the horizontal plate 41 are slidably connected to the inside of the arc frame 46. The bottom of the center frame 1 has four groups of support columns. The four corners of the bottom of the mobile seat 2 are installed with self-locking wheels 26. Initially In this state, the two moving seats 2 are close to the central frame 1. When the length of the conveying assembly needs to be increased, the second motor 42 is turned on to drive a transmission gear 43 to rotate. The four groups of transmission gears 43 mesh with each other and then mesh with the driven gear 44, driving the two telescopic plates 45 to rotate synchronously in the opposite direction. The slide seat 53 at the extended end of the telescopic plate 45 slides along the inside of the second slide groove 25, and the slide seat 53 on the back of the arc frame 46 slides along the first slide groove 11. In this process, the adjustment of the lifting assembly 5 is coordinated, that is, the rotation of the screw rod 51 is synchronized with the transmission of the gear, and the telescopic plate 45 is moved to the highest point of the first slide groove 11 and the second slide groove 25. It is convenient to connect with the slider 24. When adjusting the inclination angle of the two drive shafts 34, the two screws 51 respectively drive the slider 24 and the drive shaft 34 to move in different directions. At this time, the telescopic plate 45 rotates, and the horizontal plate 41 slides along the arc frame 46. Because the center of rotation of the telescopic plate 45 is located at the center of the horizontal plate 41, and the center of the arc frame 46 is at the same point as the center of the horizontal plate 41, there will be no movement interference, and the connection between the telescopic plate 45 and the slide seat 53 is maintained. The moving seat 2 moves away from the center frame 1 through the self-locking wheel 26 at the bottom, and is locked in position by the self-locking wheel 26 after moving to the specified position.

[0036] In this embodiment, the lifting assembly 5 also includes a third motor 52, the screw 51 is installed inside the second slide groove 25, the third motor 52 is fixed at the position corresponding to the screw 51 at the top of the vertical frame 21, and the output end of the third motor 52 is fixedly connected to the screw 51, the slide seat 53 is threadedly sleeved on the surface of the screw 51 of the second slide groove 25, and the other end of the telescopic plate 45 is rotatably connected to the slide seat 53 of the second slide groove 25 through a rotating shaft, an electric push rod 54 is fixed on the outer surface of the slide seat 53 of the second slide groove 25, and a socket 55 is fixed on the outer surface of the slider 24. The extended end of the electric push rod 54 can be inserted into the socket 55. After the telescopic plate 45 is unfolded, it is located at the horizontal position of the highest point of the first slide groove 11 and the second slide groove 25. At this time, a plug column is installed at the extended end of the electric push rod 54. By turning on the electric push rod 54, the plug column is driven to be inserted into the socket 55 to complete the connection between the slide seat 53 and the slider 24 in the second slide groove 25. The third motor 52 is turned on to drive the screw 51 to rotate. The slide seat 53 meshes with the screw 51 and descends along the second slide groove 25. The slider 24 descends synchronously, and the two sets of drive shafts 34 descend to adjust the horizontal height of the top conveying of the belt 31. During the process, the unfolding assembly 4 slides along the first slide groove 11 and keeps descending synchronously. The limiting shaft rod 33 is subjected to downward extrusion traction and slides downward along the slide rod 22, compressing the return spring 23 to maintain the tightness of the belt 31. When the moving seat 2 is not unfolded, the slider 24 can be manually pushed to slide downward along the inside of the vertical frame 21, and then the position of the slider 24 is fixed with bolts to adjust the height of the belt 31. In this state, the length of the belt 31 is short, which is suitable for conveying short products. When the moving seat 2 is unfolded and the driving shaft 34 moves to a position around the middle of the vertical frame 21, the two ends of the center frame 1 The third motor 52 is driven in different reverse directions respectively, the screw 51 turns in different directions, and the sliding seat 53 moves in different directions. At this time, one driving shaft 34 moves upward and the other moves downward, making the belt 31 inclined. In this process, the lower end of the belt 31 is still limited by the limiting shaft 33, and the tightness of the belt 31 is maintained while the two driving shafts 34 move, so that the mounting plate 12 moves upward to release more length of the belt 31. The movement distance will not exceed the position of the upper end belt 31. In this process, the telescopic plate 45 is extended to keep the two moving seats 2 connected to the center frame 1.

[0037] When using the device, fix the center frame 1 at a position close to the gravure printing machine, turn on the second motor 42 according to the length of the decorative paper required to drive a transmission gear 43 to rotate, and the four groups of transmission gears 43 mesh with each other and then mesh with the driven gear 44, driving the two telescopic plates 45 to rotate synchronously in the opposite direction, and the slide 53 at the extended end of the telescopic plate 45 slides along the inside of the second slide groove 25, and the slide 53 on the back of the arc frame 46 slides along the first slide groove 11. In this process, the adjustment of the lifting assembly 5 is coordinated, that is, the rotation of the screw 51 is synchronized with the transmission of the gears, and the telescopic plate 45 is moved to the highest point of the first slide groove 11 and the second slide groove 25, so as to facilitate the connection with the slider 24. By turning on the electric push rod 54, the plug column is driven into the socket 55 to complete the connection between the slide seat 53 in the second slide groove 25 and the slider 24, and the electric push rod 54 is turned on. The third motor 52 drives the screw 51 to rotate, and the slide 53 engages with the screw 51 and descends along the second slide groove 25. The slider 24 descends synchronously, and the two sets of drive shafts 34 descend to adjust the horizontal height of the top of the belt 31. When adjusting the inclination angle of the two drive shafts 34, the two screws 51 respectively drive the slider 24 and the drive shaft 34 to move in different directions. At this time, the telescopic plate 45 rotates, and the cross plate 41 slides along the arc frame 46. Because the center of rotation of the telescopic plate 45 is located at the center of the cross plate 41, and the center of the arc frame 46 is at the same point as the center of the cross plate 41, there is no movement interference, and the telescopic plate 45 is kept connected with the slide 53. The moving seat 2 moves away from the center frame 1 through the self-locking wheel 26 at the bottom, and after moving to the specified position, it is locked in position by the self-locking wheel 26 to transport the decorative paper.

[0038] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A conveying structure of a decorative paper gravure printing machine, comprising a center frame (1), characterized in that: A movable seat (2) is provided on both sides of the central frame (1), and vertical frames (21) are fixed on both sides of the top of the movable seat (2), and a slider (24) is slidably connected inside the vertical frame (21). A mounting plate (12) is slidably connected inside the two sides of the central frame (1), and a transmission assembly (3) is installed on the surfaces of the mounting plate (12) and the slider (24). The transmission assembly (3) comprises a drive shaft (34), and a drive shaft (34) is rotatably installed between two sliders (24) on the top of the movable seat (2) via a bearing, and two groups of limit shaft rods (33) are rotatably installed between the two mounting plates (12) via bearings, and a belt (31) is sleeved on the top of the drive shaft (34), and the lower end of the belt (31) bypasses the two limit shaft rods (33). The central frame (1) is provided with an expansion assembly (4) on the outside thereof, the expansion assembly (4) comprising a telescopic plate (45), the central frame (1) being slidably mounted with the telescopic plate (45) on the surfaces of both sides of the mounting plate (12), and the extended end of the telescopic plate (45) is connected to one side of the vertical frame (21), the vertical frame (21) is provided with a lifting assembly (5) at one end thereof corresponding to the telescopic plate (45), the lifting assembly (5) comprising a screw rod (51), the vertical frame (21) being rotatably mounted with the screw rod (51) at a position corresponding to the extended end of the telescopic plate (45) through a bearing, the extended end of the telescopic plate (45) being connected to the screw rod (51), the expansion assembly (4) further comprising a horizontal plate (41), the central frame (1) being provided with a telescopic plate (45) on the surfaces of the mounting plate (12) on both sides thereof, and the extended end of the telescopic plate (45) is connected to the one side of the vertical frame (21), the vertical frame (21) being provided with a lifting assembly (5), the lifting assembly (5) comprising a screw rod (51), the vertical frame (21) being provided with a screw rod (51) at a position corresponding to the extended end of the telescopic plate (45) through a bearing, the extended end of the telescopic plate (45) being connected to the screw rod (51), the expansion assembly (4) further comprising a horizontal plate (41), the central frame (1) being provided with a telescopic plate (45) on the outside thereof, and the telescopic plate (45) being connected to the screw rod (51), the expansion assembly (4) further comprising a horizontal plate (41), the central frame (1) being provided with a telescopic plate (45) on the surfaces of the mounting plate (12) on both sides thereof, and the extended end of the telescopic plate (45) is connected to the screw rod (51), the expansion assembly (4) further comprising a horizontal plate (41 ) are provided on both outer sides of the horizontal plate (41), and four groups of transmission gears (43) are rotatably mounted on the surface of the horizontal plate (41) through bearings, and a second motor (42) is fixed at a position corresponding to a transmission gear (43) on the horizontal plate (41), and an output end of the second motor (42) is fixedly connected to the transmission gear (43), and adjacent transmission gears (43) are meshingly connected, one end of the telescopic plate (45) is rotatably mounted on the horizontal plate (41) through a bearing, and a driven gear (44) is sleeved at the position where the telescopic plate (45) is rotatably mounted, and the driven gear (44) is meshingly connected to the outermost transmission gear (43), the central frame (1) is provided with first sliding grooves (11) on both sides of the mounting plate (12), and the vertical frame (21) is opposite to the vertical frame (21). A second slide groove (25) is provided at the position of the screw rod (51), and a slide seat (53) is slidably connected inside the first slide groove (11) and the second slide groove (25). The center frame (1) is fixed with an arc frame (46) on the outer surface of the slide seat (53) on both sides of the mounting plate (12). The center of the two groups of arc frames (46) is the same as the center of the horizontal plate (41), and the two ends of the horizontal plate (41) are slidably connected inside the arc frame (46). The lifting component (5) also includes a third motor (52), and the screw rod (51) is installed inside the second slide groove (25). The third motor (52) is fixed at the position of the top of the vertical frame (21) corresponding to the screw rod (51), and the output end of the third motor (52) is fixedly connected to the screw rod (51).The slide seat (53) is threadedly sleeved on the surface of the screw rod (51) of the second slide groove (25), and the other end of the telescopic plate (45) is rotatably connected to the slide seat (53) of the second slide groove (25) via a rotating shaft.

2. The conveying structure of the decorative paper gravure printing machine according to claim 1, characterized in that: The transmission assembly (3) further comprises a slide rod (22), the slide rods (22) being fixed inside both sides of the vertical frame (21) and the center frame (1), and the slider (24) and the mounting plate (12) being slidably sleeved on the corresponding slide rod (22), a return spring (23) being sleeved on the surface of the slide rod (22), and the top of the return spring (23) being fixedly connected to the slider (24) and the mounting plate (12).

3. The conveying structure of the decorative paper gravure printing machine according to claim 2, characterized in that: Limiting plates (28) are provided on both sides of the top of the driving shaft (34), a bidirectional screw rod (27) is rotatably mounted between the two sliders (24) on the top of the moving seat (2) via a bearing, and the bottom of the limiting plate (28) is threadedly sleeved on both ends of the bidirectional screw rod (27).

4. The conveying structure of the decorative paper gravure printing machine according to claim 3, characterized in that: A first motor (32) is fixed on the surface of a slider (24) at the rear end of the center frame (1), and the output end of the first motor (32) is fixedly connected to the drive shaft (34); the slider (24) is located on the surface of the bottom of the drive shaft (34) and is rotatably connected to a guide rod (210) via a bearing; and a belt (31) passes through the bottom of the drive shaft (34) and the bottom of the guide rod (210).

5. The conveying structure of the decorative paper gravure printing machine according to claim 1, characterized in that: An electric push rod (54) is fixed on the outer surface of the slide seat (53) of the second slide groove (25), and a socket (55) is fixed on the outer surface of the slide block (24). The extended end of the electric push rod (54) can be inserted into the socket (55).

6. The conveying structure of the decorative paper gravure printing machine according to claim 3, characterized in that: A blocking cloth (29) is connected between the limit plates (28) on both sides of the center frame (1), a winding box is installed on the side of the limit plate (28) facing the blocking cloth (29), and both ends of the blocking cloth (29) are wound inside the winding box of the limit plate (28) via a winding shaft and a torsion spring.

7. The conveying structure of the decorative paper gravure printing machine according to claim 1, characterized in that: The bottom of the central frame (1) is provided with four groups of support columns, and the four corners of the bottom of the movable seat (2) are provided with self-locking wheels (26).

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