Digital printing machine substrate conveying device and conveying method based on thin paper printing

Abstract

The present invention relates to the technical field of printing auxiliary equipment, and more specifically, to a substrate conveying device and a conveying method of a digital printing press based on thin paper printing, comprising a fixing device, an air blowing system arranged inside the fixing device, a driving device arranged above the air blowing system, and a pressing device for ensuring a paper placement interval. The substrate conveying device and a conveying method of a digital printing press based on thin paper printing, after the dual-axis motor is started, transmits its power through a transmission group, drives the feed pulley to rotate, and enables the fixed tube body to move along the direction of the guide groove, and through an externally convex rack, allows the thin paper to be delivered to the top of the feed pulley by a plurality of suction nozzles, and the lower pressure strip can immediately press the thin paper against the surface of the feed pulley, thereby reducing the energy consumption of the overall equipment and the cost of subsequent inspection and maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of printing auxiliary equipment, in particular to a substrate conveying device and a conveying method of a digital printing machine based on thin paper printing. Background Art

[0002] The substrate conveying device of the digital printing press based on thin paper printing is a key component designed specifically for thin paper printing. It adopts advanced paper feeding technology, such as pneumatic paper feeding, which uses air pumps and suction nozzles to accurately separate and transfer paper, ensuring that the paper is smoothly and reliably transported to the printing area. The device also has the function of adjusting the paper conveying distance and time to improve printing speed and efficiency.

[0003] The patent with application number CN202322774228.3 discloses a digital printing press substrate conveying device and its platform connection device, including two connection modules. The connection module includes a hook portion arranged on a supporting vertical plate, a fixing seat fixed to the extension platform and the front end extending toward the supporting vertical plate, and a movable hook. The fixing seat includes a first adjustment plate and a second adjustment plate. The movable hook is arranged on the second adjustment plate. One of the first adjustment plate and the extension platform is provided with a first strip hole and the other is provided with a first screw hole. The first adjustment bolt locks the first adjustment plate on the extension platform, which can facilitate the connection and adjustment of the extension platform.

[0004] However, in the process of transporting thin paper, the existing digital printing machine adopts a more complicated power transmission system, which requires multiple driving devices to work together to control the movement of the conveyor belt, the suction nozzle and the paper pressing roller, resulting in high energy consumption and increased maintenance costs. In addition, in the existing blowing paper feeding system, the gap between the blowing port and the paper is large, and due to the expansion of the blowing area and the influence of the paper splint, the air flow will encounter air resistance during the transmission process, resulting in a gradual decrease in air pressure, and it is impossible to form sufficient blowing force to overcome the adhesion between the papers. The existing system often uses high-power fans, but this increases the equipment cost and noise pollution.

[0005] In view of this, we propose a substrate conveying device and a conveying method for a digital printing machine based on thin paper printing. Summary of the invention

[0006] The object of the present invention is to provide a substrate conveying device and a conveying method of a digital printing machine based on thin paper printing, so as to solve the problems raised in the above background technology.

[0007] To achieve the above object, on the one hand, the present invention provides the following technical solutions:

[0008] A substrate conveying device for a digital printing machine based on thin paper printing, comprising a fixing device, an air blowing system arranged inside the fixing device, a driving device arranged above the air blowing system, and a pressing device for ensuring a paper placement interval;

[0009] The fixing device comprises a fixing frame, a paper guide frame arranged inside the fixing frame, and a lifting plate capable of moving up and down inside the fixing frame, and guide grooves are provided on the outer side walls at both ends of the fixing frame;

[0010] The air blowing system comprises an air blower, a fixed tube body arranged above the paper guide, a plurality of suction nozzles regularly arranged on the outer side wall of the fixed tube body, and two symmetrically arranged paper body clamping parts, and tube body blocks are arranged on the outer side walls of the left and right ends of the fixed tube body;

[0011] The paper clamping part includes a movable horizontal plate and a clamping frame arranged on the top surface of the movable horizontal plate, and a plurality of regularly distributed air outlet holes are opened on the inner side wall of the clamping frame;

[0012] The driving device comprises a double-axis motor, a rotating shaft arranged on the output shafts at the left and right ends of the double-axis motor, two connecting shafts that rotate as the rotating shaft rotates, a transmission group arranged between the rotating shaft and the two connecting shafts, two movable slide bars that can move back and forth, and a placement rod that rotates as the movable slide bars move;

[0013] The transmission group comprises three groups of regularly distributed pulleys, a transmission belt sleeved on the outside of the three groups of pulleys, and a shifting rod which rotates intermittently as one of the pulleys rotates.

[0014] In the technical solution of the present invention, the outer walls at both ends of the fixed frame are provided with frame wall slide grooves on the front side of the guide grooves, the paper guide frame is fixedly connected to the inside of the fixed frame by screws, a plurality of regularly distributed frame top through grooves which are through the top and bottom are provided on the top surface of the paper guide frame, the top surface of the paper guide frame is inclined with the front being higher and the rear being lower, a partition plate which is welded and fixed to the inner wall of the fixed frame is provided below the paper guide frame, the outer walls at both ends of the fixed frame are fixedly connected with outer cover bodies by bolts, the lifting plate is slidably connected to the inside of the fixed frame, two first slide grooves are provided on the top surface of the lifting plate near the front end, and two second slide grooves with isosceles trapezoidal cross-sections are provided on the top surface of the lifting plate at the rear side of the first slide grooves.

[0015] In the technical solution of the present invention, the blower is fixedly connected to the inner bottom surface of the fixed frame by bolts, the left and right ends of the fixed tube body extend to the outside of the outer sleeve cover and the ends are connected to the air inlet flange of the blower, the tube body block is clamped and fixed to the outer side wall of the fixed tube body, and the outer flange of the air outlet of the blower is connected to the air outlet pipe.

[0016] In the technical solution of the present invention, a wedge block matching the size of the second slide groove is welded to the bottom of the movable horizontal plate, the clamping frame is welded and fixed to the top surface of the movable horizontal plate, and an outer convex tube developed to the outside of the fixed frame is integrally formed on the outer wall of the clamping frame, and the outer convex tube is connected to the end pipe flange of the air outlet pipe.

[0017] In the technical solution of the present invention, the dual-axis motor is fixedly connected to the outer wall of the partition plate by bolts, the rotating shaft is coaxially connected to the output shaft of the dual-axis motor, the left and right ends of the connecting shaft are respectively rotatably connected to the outer walls of the left and right ends of the fixed frame, and a number of regularly distributed feeding pulleys are sleeved on the outer wall of the connecting shaft, and the top end of the feeding pulley extends to above the top slot of the frame.

[0018] In the technical solution of the present invention, several of the pulleys are fixedly connected to the end positions of the rotating shaft and the connecting shaft through bayonet pins, and the outer wall of the pulley fixed at the end position of the rotating shaft is clamped with a wheel body convex tooth, the shift rod is rotatably connected to the outer wall of the fixed frame, the outer wall of the shift rod center rod is sleeved with a docking gear, a transmission gear is provided between the wheel body convex tooth and the docking gear, and the outer wall of the transmission gear is clamped with an arc-shaped ring tooth meshing with the docking gear.

[0019] In the technical solution of the present invention, the movable slide rod is slidably connected to the inner wall of the outer sleeve cover body, an external convex rack is welded on the outer wall of the movable slide rod, a limiting slide groove penetrating left and right is opened above the movable slide rod, the size of the limiting slide groove is adapted to the size of the tube body block, and a rod wall through groove is opened below the limiting slide groove for increasing the moving range of the convex shaft at the end of the lever.

[0020] In the technical solution of the present invention, the left and right ends of the placement rod are rotatably connected to the inner walls of the left and right outer cover bodies respectively, and a plurality of pressing strips for pressing down the thin paper are sleeved on the outer wall of the placement rod. The end position of the placement rod is fixedly connected with a rod end gear meshing with the external convex rack by a bayonet pin.

[0021] In the technical solution of the present invention, the pressing device includes a limit baffle, a flip rod rotatably connected to the outer wall of the rear end of the limit baffle near the top position, and a pressure roller rotatably connected to the bottom end of the flip rod. The bottom surface of the limit baffle is integrally formed with a bottom block slidably connected to the inside of the first slide groove.

[0022] On the other hand, the present invention also provides a substrate conveying method for a digital printer based on thin paper printing, using the above-mentioned substrate conveying device for a digital printer based on thin paper printing, comprising the following steps:

[0023] S1. First, the operator places the thin paper to be printed on the top surface of the lifting plate, places the two sets of paper clamping parts on the left and right sides of the thin paper, and places the limit baffle against the front end of the thin paper;

[0024] S2. Next, the blower in the blowing system is started, and the external gas enters the interior of the fixed pipe body through the suction nozzle, enters the blower through the suction pipe, and is then discharged from the outlet pipe;

[0025] S3, at this time, the airflow discharged from the air outlet pipe enters the interior of the clamping frame through the outer convex pipe, and blows toward the stacked thin paper from the plurality of air outlet holes;

[0026] S4, then, start the double-axis motor to drive the rotating shafts at both ends to rotate, and make the pulley fixed on the outer side of the rotating shaft rotate, and then make the other two pulleys rotate through the transmission belt, so that the two connecting shafts and several feeding pulleys rotate at the same time;

[0027] S5. The belt pulley on the outer side of the rotating shaft rotates, and the convex teeth of the wheel body rotate as well, and the transmission gear rotates together with the arc-shaped ring teeth. After the arc-shaped ring teeth come into contact with the docking gear, the lever is driven to rotate;

[0028] S6. After the lever is rotated, the convex shaft at the end will continuously change the fixed position in the rod wall groove, driving the movable slide rod as a whole to rotate and reciprocate back and forth, thereby driving the fixed tube body to reciprocate inside the guide groove, thereby transporting the top thin paper to the top of the feeding pulley through the suction nozzle;

[0029] S7. When the movable slide rod moves to the rear end as a whole, the outer convex rack contacts the rod end gear during the movement, driving the placement rod to rotate clockwise, and then the thin paper is mortgaged on the surface of the feeding pulley through the lower pressure bar, thereby transporting the thin paper to the bottom of the paper guide frame.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The substrate conveying device and conveying method of the digital printing machine based on thin paper printing, after the double-axis motor is started, its power is transmitted through the transmission group, and the feeding pulley is driven to rotate, while the fixed tube body can be moved along the direction of the guide groove, and the thin paper is sent to the top of the feeding pulley by a plurality of suction nozzles through the external convex rack, and the lower pressure bar can immediately press the thin paper against the surface of the feeding pulley, thereby reducing the energy consumption of the overall equipment and the cost of subsequent inspection and maintenance.

[0032] 2. In the substrate conveying device and conveying method of the digital printing machine based on thin paper printing, after the clamping frame clamps and fixes the stacked thin paper, the air outlet of the blower can be directly introduced into the interior of the clamping frame through the air outlet pipe and blown out directly from the air outlet, thereby blowing the thin paper away, preventing paper jams, and reducing the energy loss of the air flow during flow, avoiding the use of additional high-power fans and increasing noise pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0035] Figure 3 It is a schematic cross-sectional view of the structure of the fixing device in the present invention;

[0036] Figure 4 It is a structural schematic diagram of the blast system in the present invention;

[0037] Figure 5 It is a structural schematic diagram of the paper clamping part in the present invention;

[0038] Figure 6 It is a schematic diagram of the structure of the driving device in the present invention;

[0039] Figure 7 For the present invention Figure 6 A magnified schematic diagram of part A;

[0040] Figure 8 It is a structural schematic diagram of the transmission group in the present invention;

[0041] Fig. 9 It is a structural schematic diagram of the movable sliding rod in the present invention;

[0042] Fig.10 It is a schematic diagram of the structure of the pressing device in the present invention;

[0043] Description of reference numerals:

[0044] 100, fixing device; 110, fixing frame; 111, guide groove; 112, frame wall slide groove; 120, paper guide rack; 121, rack top through groove; 130, partition plate; 140, outer cover; 150, lifting plate; 151, first slide groove; 152, second slide groove;

[0045] 200, air blowing system; 210, air blower; 220, air suction pipe; 230, fixed pipe body; 231, pipe body block; 240, air suction nozzle; 250, air outlet pipe; 260, paper body clamping part; 261, movable horizontal plate; 262, wedge block; 263, clamping frame; 2630, air outlet hole; 2631, external convex pipe;

[0046] 300, driving device; 310, double-axis motor; 320, rotating shaft; 330, transmission group; 331, pulley; 332, transmission belt; 333, wheel body convex teeth; 334, transmission gear; 335, arc ring teeth; 336, lever; 337, docking gear; 340, connecting shaft; 350, feeding pulley; 360, moving slide bar; 361, outer convex rack; 362, limit slide groove; 363, rod wall through groove; 370, placement rod; 380, lower pressure strip; 390, rod end gear;

[0047] 400, pressing device; 410, limit baffle; 411, bottom convex block; 420, turning rod; 430, pressing roller. DETAILED DESCRIPTION

[0048] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in 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 in 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.

[0049] See also Figure 1-Figure 10 As shown, this embodiment provides a technical solution:

[0050] A substrate conveying device for a digital printing machine based on thin paper printing comprises a fixing device 100, an air blowing system 200 arranged inside the fixing device 100, a driving device 300 arranged above the air blowing system 200, and a pressing device 400 for ensuring a paper placement interval;

[0051] In the present invention, the fixing device 100 includes a fixing frame 110, a paper guide frame 120 disposed inside the fixing frame 110, and a lifting plate 150 capable of moving up and down inside the fixing frame 110. The outer side walls of the left and right ends of the fixing frame 110 are provided with guide grooves 111.

[0052] Specifically, the outer walls at the left and right ends of the fixed frame 110 are provided with frame wall sliding grooves 112 on the front side of the guide grooves 111, the paper guide frame 120 is fixedly connected to the inside of the fixed frame 110 by screws, and a plurality of regularly distributed frame top through grooves 121 that are through the top of the paper guide frame 120 are provided. The top surface of the paper guide frame 120 is inclined with the front higher and the rear lower. A partition plate 130 is provided below the paper guide frame 120 and is welded and fixed to the inner wall of the fixed frame 110. The outer walls at the left and right ends of the fixed frame 110 are fixedly connected with outer cover bodies 140 by bolts, the lifting plate 150 is slidably connected to the inside of the fixed frame 110, and two first sliding grooves 151 are provided on the top surface of the lifting plate 150 near the front end, and two second sliding grooves 152 with isosceles trapezoidal longitudinal cross-sections are provided on the top surface of the lifting plate 150 at the rear side of the first sliding grooves 151.

[0053] Furthermore, the fixed frame 110 is used to ensure the strength of the overall structure of the fixing device 100, the guide groove 111 is used to limit the movement range of the internal structure of the blowing system 200, the paper guide rack 120 is used to facilitate the transportation of paper toward the printing press, the partition plate 130 is used to provide a fixed platform for the structure in the driving device 300, the outer cover 140 is used to prevent the driving device 300 from being interfered with by external factors, and the lifting plate 150 is used to keep the top height of the stacked paper at the optimal position at all times, and an electric push rod that can control its lifting and lowering at will can be placed at the bottom.

[0054] In this embodiment, Figure 4-Figure 5 As shown, the air blowing system 200 includes an air blower 210, a fixed tube 230 disposed above the paper guide 120, a plurality of suction nozzles 240 regularly disposed on the outer wall of the fixed tube 230, and two symmetrically disposed paper clamping parts 260, and a tube block 231 is disposed on the outer wall of the left and right ends of the fixed tube 230;

[0055] Specifically, the paper clamping portion 260 includes a movable transverse plate 261 and a clamping frame 263 disposed on the top surface of the movable transverse plate 261 , and a plurality of regularly distributed air outlet holes 2630 are formed on the inner side wall of the clamping frame 263 .

[0056] Furthermore, the blower 210 is fixedly connected to the inner bottom surface of the fixed frame 110 by bolts, the left and right ends of the fixed tube body 230 extend to the outside of the outer sleeve cover 140 and the ends are connected to the air inlet flange of the blower 210, the tube body block 231 is clamped and fixed to the outer wall of the fixed tube body 230, and the outer flange of the air outlet of the blower 210 is connected to the air outlet pipe 250.

[0057] Furthermore, a wedge block 262 matching the size of the second slide groove 152 is welded to the bottom of the movable horizontal plate 261, and a clamping frame 263 is welded and fixed to the top surface of the movable horizontal plate 261. An outer convex tube 2631 developed to the outside of the fixed frame 110 is integrally formed on the outer wall of the clamping frame 263, and the outer convex tube 2631 is connected to the end pipe flange of the air outlet pipe 250.

[0058] Furthermore, after starting the blower 210 in the blowing system 200, the external gas enters the interior of the fixed tube body 230 through the suction nozzle 240, and enters the blower 210 through the suction pipe 220 and is then discharged from the outlet pipe 250. At this time, the airflow discharged from the outlet pipe 250 enters the interior of the clamping frame 263 through the outer convex tube 2631, and blows toward the stacked thin paper from a plurality of air outlet holes 2630. The tube body block 231 is used to cooperate with the structure in the driving device 300 to limit the moving range of the fixed tube body 230. The movable cross plate 261 cooperates with the wedge block 262 to ensure the smooth movement of the clamping frame 263, and the outer convex tube 2631 is used to increase the fixed base point for the outlet pipe 250.

[0059] In this embodiment, Figure 4-Figure 9 As shown, the driving device 300 includes a dual-axis motor 310, a rotating shaft 320 disposed on the output shafts at the left and right ends of the dual-axis motor 310, two connecting shafts 340 that rotate as the rotating shaft 320 rotates, a transmission group 330 disposed between the rotating shaft 320 and the two connecting shafts 340, two reciprocating movable slide bars 360, and a placement bar 370 that rotates as the movable slide bars 360 move;

[0060] Specifically, the transmission group 330 includes three groups of regularly distributed pulleys 331, a transmission belt 332 sleeved on the outside of the three groups of pulleys 331, and a lever 336 that rotates intermittently as one of the pulleys 331 rotates.

[0061] Furthermore, the dual-axis motor 310 is fixedly connected to the outer wall of the partition plate 130 by bolts, the rotating shaft 320 is coaxially connected to the output shaft of the dual-axis motor 310, and the left and right ends of the connecting shaft 340 are respectively rotatably connected to the outer walls of the left and right ends of the fixed frame 110, and a number of regularly distributed feeding pulleys 350 are sleeved on the outer wall of the connecting shaft 340, and the top of the feeding pulley 350 extends to above the top slot 121 of the frame.

[0062] Furthermore, a plurality of pulleys 331 are fixedly connected to the end positions of the rotating shaft 320 and the connecting shaft 340 by means of bayonet pins, and a wheel body convex tooth 333 is clamped and fixed on the outer wall of the pulley 331 fixed at the end position of the rotating shaft 320. A lever 336 is rotatably connected to the outer wall of the fixed frame 110, and a docking gear 337 is sleeved on the outer wall of the center rod of the lever 336. A transmission gear 334 is provided between the wheel body convex tooth 333 and the docking gear 337, and an arcuate ring tooth 335 meshing with the docking gear 337 is clamped and fixed on the outer wall of the transmission gear 334.

[0063] Furthermore, the movable slide rod 360 is slidably connected to the inner wall of the outer sleeve cover body 140, and an externally convex rack 361 is welded on the outer wall of the movable slide rod 360. A left-right through-limiting groove 362 is opened above the movable slide rod 360. The size of the limiting groove 362 is adapted to the size of the tube body block 231. The movable slide rod 360 is provided with a rod wall through groove 363 below the limiting groove 362 for increasing the moving range of the convex shaft at the end of the shift rod 336.

[0064] Furthermore, the dual-axis motor 310 is started to drive the rotating shafts 320 at both ends to rotate, and the pulley 331 fixed on the outside of the rotating shaft 320 is rotated, and through the transmission belt 332, the other two pulleys 331 are rotated, so that the two connecting shafts 340 and the plurality of feeding pulleys 350 are rotated at the same time.

[0065] Furthermore, when the pulley 331 on the outer side of the rotating shaft 320 rotates, the wheel body convex tooth 333 will also be driven to rotate, and the transmission gear 334 will be driven to rotate together with the arc ring tooth 335. After the arc ring tooth 335 contacts the docking gear 337, it will drive the lever 336 to rotate.

[0066] Furthermore, after the lever 336 is rotated, the convex shaft at the end will continuously change the fixed position in the rod wall groove 363, thereby driving the movable slide rod 360 to rotate as a whole and move back and forth, thereby driving the fixed tube body 230 to move back and forth inside the guide groove 111, thereby transporting the top thin paper to the top of the feeding pulley 350 through the suction nozzle 240.

[0067] In this embodiment, Figure 6-Figure 9 As shown, the left and right ends of the placement rod 370 are rotatably connected to the inner side walls of the left and right outer cover bodies 140, and a plurality of lower pressing strips 380 for pressing down the thin paper are sleeved on the outer side wall of the placement rod 370. The end position of the placement rod 370 is fixedly connected to a rod end gear 390 meshing with the outer convex rack 361 through a bayonet.

[0068] Furthermore, when the movable slide rod 360 moves to the rear end as a whole, the outer convex rack 361 contacts the rod end gear 390 during the movement, thereby driving the placement rod 370 to rotate clockwise, and then the thin paper is mortgaged on the surface of the feeding pulley 350 through the lower pressure bar 380, thereby transporting the thin paper toward the bottom of the paper guide frame 120.

[0069] In this embodiment, Fig.10 As shown, the pressing device 400 includes a limit baffle 410, a flip rod 420 rotatably connected to the rear end outer wall of the limit baffle 410 near the top position, and a pressing roller 430 rotatably connected to the bottom end of the flip rod 420. The bottom surface of the limit baffle 410 is integrally formed with a bottom plate protrusion 411 slidably connected to the inside of the first slide groove 151;

[0070] Furthermore, the limit baffle 410 is used to press against the front end of the paper, the bottom plate protrusion 411 is used to facilitate the movement of the limit baffle 410, the flip rod 420 is used to change the position of the pressing roller 430, and the pressing roller 430 is used to prevent the paper from being blown away.

[0071] The present invention also proposes a substrate conveying method for a digital printer based on thin paper printing, using the above-mentioned substrate conveying device for a digital printer based on thin paper printing, comprising the following steps:

[0072] S1. First, the operator places the thin paper to be printed on the top surface of the lifting plate 150, places the two sets of paper clamping parts 260 on the left and right sides of the thin paper, and places the limit baffle 410 against the front end of the thin paper;

[0073] S2. Next, the blower 210 in the blowing system 200 is started, and the external air enters the interior of the fixed tube body 230 through the air suction nozzle 240, enters the blower 210 through the air suction pipe 220, and is then discharged from the air outlet pipe 250;

[0074] S3. At this time, the airflow discharged from the air outlet pipe 250 enters the interior of the clamping frame 263 through the outer convex pipe 2631, and blows toward the stacked thin papers from the plurality of air outlet holes 2630;

[0075] S4, then, the dual-axis motor 310 is started to drive the rotating shafts 320 at both ends to rotate, and the pulleys 331 fixed on the outer side of the rotating shaft 320 are rotated, and the other two pulleys 331 are rotated through the transmission belt 332, so that the two connecting shafts 340 and the plurality of feeding pulleys 350 are rotated at the same time;

[0076] S5, the belt pulley 331 on the outer side of the rotating shaft 320 rotates, and the wheel body convex teeth 333 also rotate, and the transmission gear 334 rotates together with the arc ring gear 335. After the arc ring gear 335 contacts the docking gear 337, the lever 336 is driven to rotate;

[0077] S6, after the lever 336 rotates, the convex shaft at the end will continuously change the fixed position in the rod wall slot 363, driving the movable slide bar 360 to rotate and reciprocate as a whole, thereby driving the fixed tube body 230 to reciprocate inside the guide slot 111, so that the top thin paper is transported to the top of the feeding pulley 350 through the suction nozzle 240;

[0078] S7. When the movable slide rod 360 moves to the rear end as a whole, the outer convex rack 361 contacts the rod end gear 390 during the movement, driving the placement rod 370 to rotate clockwise, and then the thin paper is mortgaged on the surface of the feeding pulley 350 through the lower pressing bar 380, thereby transporting the thin paper to the bottom of the paper guide frame 120.

[0079] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the specification and its equivalents.

Claims

1. A substrate conveying device for a digital printing machine based on thin paper printing, comprising a fixing device (100), an air blowing system (200) arranged inside the fixing device (100), a driving device (300) arranged above the air blowing system (200), and a pressing device (400) for ensuring a paper placement interval; Features: The fixing device (100) comprises a fixing frame (110), a paper guide frame (120) arranged inside the fixing frame (110), and a lifting plate (150) capable of moving up and down inside the fixing frame (110); guide grooves (111) are provided on the outer side walls at both left and right ends of the fixing frame (110); The air blowing system (200) comprises an air blower (210), a fixed tube (230) arranged above the paper guide rack (120), a plurality of suction nozzles (240) regularly arranged on the outer side wall of the fixed tube (230), and two symmetrically arranged paper clamping parts (260), wherein tube blocks (231) are arranged on the outer side walls of the left and right ends of the fixed tube (230); The paper clamping portion (260) comprises a movable transverse plate (261) and a clamping frame (263) arranged on the top surface of the movable transverse plate (261), and a plurality of regularly distributed air outlet holes (2630) are provided on the inner side wall of the clamping frame (263); The driving device (300) comprises a dual-axis motor (310), a rotating shaft (320) arranged on the output shafts at the left and right ends of the dual-axis motor (310), two connecting shafts (340) that rotate as the rotating shaft (320) rotates, a transmission group (330) arranged between the rotating shaft (320) and the two connecting shafts (340), two reciprocating movable slide bars (360), and a placement rod (370) that rotates as the movable slide bars (360) move; The transmission group (330) comprises three groups of regularly distributed pulleys (331), a transmission belt (332) sleeved on the outside of the three groups of pulleys (331), and a lever (336) that rotates intermittently as one of the pulleys (331) rotates; A plurality of regularly distributed top through grooves (121) are provided on the top surface of the paper guide frame (120), and the top surface of the paper guide frame (120) is inclined so that it is higher in the front and lower in the back. A partition plate (130) is provided below the paper guide frame (120) and is welded and fixed to the inner wall of the fixed frame (110). The outer walls at the left and right ends of the fixed frame (110) are both fixedly connected to an outer cover body (140) by bolts. A plurality of regularly distributed feeding pulleys (350) are sleeved on the outer side wall of the connecting shaft (340), and the top ends of the feeding pulleys (350) extend to the top of the frame top through slot (121); The movable slide bar (360) is slidably connected to the inner wall of the outer cover body (140); an outer convex rack (361) is welded to the outer wall of the movable slide bar (360); a limit slide groove (362) is provided on the upper side of the movable slide bar (360) and passes through the left and right sides; the size of the limit slide groove (362) is matched with the size of the tube block (231); and a rod wall through groove (363) is provided on the lower side of the limit slide groove (362) of the movable slide bar (360) for increasing the moving range of the convex shaft at the end of the shifting rod (336); A plurality of pressing bars (380) for pressing down thin paper are sleeved on the outer wall of the placement rod (370), and a rod end gear (390) meshing with an outer protruding rack (361) is fixedly connected at the end of the placement rod (370) via a bayonet.

2. The substrate conveying device of a digital printer based on thin paper printing according to claim 1, characterized in that: The outer walls at both ends of the fixed frame (110) are provided with frame wall sliding grooves (112) at the front side of the guide grooves (111); the paper guide frame (120) is fixedly connected to the inside of the fixed frame (110) by screws; the lifting plate (150) is slidably connected to the inside of the fixed frame (110); two first sliding grooves (151) are provided on the top surface of the lifting plate (150) near the front end; and two second sliding grooves (152) with longitudinal cross-sections being isosceles trapezoidal are provided on the top surface of the lifting plate (150) at the rear side of the first sliding grooves (151).

3. The substrate conveying device of a digital printer based on thin paper printing according to claim 2, characterized in that: The blower (210) is fixedly connected to the inner bottom surface of the fixed frame (110) by bolts; the left and right ends of the fixed tube body (230) extend to the outside of the outer cover body (140) and the ends are connected to the air inlet flange of the blower (210); the tube body block (231) is fixedly snapped onto the outer side wall of the fixed tube body (230); and the outer side flange of the air outlet of the blower (210) is connected to the air outlet pipe (250).

4. The substrate conveying device of a digital printer based on thin paper printing according to claim 3, characterized in that: A wedge block (262) having a size matching that of the second slide groove (152) is welded to the bottom of the movable horizontal plate (261); the clamping frame (263) is welded and fixed to the top surface of the movable horizontal plate (261); an outer convex tube (2631) extending to the outside of the fixed frame (110) is integrally formed on the outer wall of the clamping frame (263); the outer convex tube (2631) is connected to the end pipe flange of the air outlet pipe (250).

5. The substrate conveying device of a digital printer based on thin paper printing according to claim 4, characterized in that: The dual-axis motor (310) is fixedly connected to the outer side wall of the partition plate (130) by means of bolts, the rotating shaft (320) is coaxially connected to the output shaft of the dual-axis motor (310), and the left and right ends of the connecting shaft (340) are rotatably connected to the left and right outer side walls of the fixed frame (110) respectively.

6. The substrate conveying device of a digital printer based on thin paper printing according to claim 5, characterized in that: The plurality of pulleys (331) are fixedly connected to the end positions of the rotating shaft (320) and the connecting shaft (340) by means of bayonet pins, and a wheel body convex tooth (333) is clamped and fixed on the outer wall of the pulley (331) fixed at the end position of the rotating shaft (320). The lever (336) is rotatably connected to the outer wall of the fixed frame (110), and a docking gear (337) is sleeved on the outer wall of the center rod of the lever (336). A transmission gear (334) is provided between the wheel body convex tooth (333) and the docking gear (337), and an arcuate ring tooth (335) meshing with the docking gear (337) is clamped and fixed on the outer wall of the transmission gear (334).

7. The substrate conveying device of a digital printer based on thin paper printing according to claim 6, characterized in that: The left and right ends of the placement rod (370) are rotatably connected to the inner side walls of the left and right outer cover bodies (140) respectively.

8. The substrate conveying device of a digital printer based on thin paper printing according to claim 7, characterized in that: The pressing device (400) comprises a limit baffle (410), a flip rod (420) rotatably connected to the rear end outer wall of the limit baffle (410) near the top end, and a pressing roller (430) rotatably connected to the bottom end of the flip rod (420), and the bottom surface of the limit baffle (410) is integrally formed with a bottom plate protrusion (411) slidably connected to the inside of the first slide groove (151).

9. A method for conveying substrates of a digital printer based on thin paper printing, using the substrate conveying device of a digital printer based on thin paper printing according to claim 8, characterized in that: The following steps are involved: S1. First, the operator places the thin paper to be printed on the top surface of the lifting plate (150), places two sets of paper clamping parts (260) on the left and right sides of the thin paper, and places the limit baffle (410) against the front end of the thin paper; S2. Next, the blower (210) in the blowing system (200) is started, and the external gas enters the interior of the fixed tube body (230) through the air suction nozzle (240), enters the blower (210) through the air suction pipe (220), and is then discharged from the air outlet pipe (250); S3. At this time, the airflow discharged from the air outlet pipe (250) enters the interior of the clamping frame (263) through the outer convex pipe (2631), and blows toward the stacked thin paper from the plurality of air outlet holes (2630); S4, then, starting the dual-axis motor (310) to drive the rotating shafts (320) at both ends to rotate, causing the pulley (331) fixed on the outside of the rotating shaft (320) to rotate, and then causing the other two pulleys (331) to rotate through the transmission belt (332), thereby causing the two connecting shafts (340) and the plurality of feeding pulleys (350) to rotate simultaneously; S5, the belt pulley (331) on the outer side of the rotating shaft (320) rotates, and at the same time, the wheel body convex teeth (333) are driven to rotate, and the transmission gear (334) and the arc-shaped ring teeth (335) are driven to rotate together. After the arc-shaped ring teeth (335) contact the docking gear (337), the lever (336) is driven to rotate; S6, after the lever (336) rotates, the convex shaft at the end will continuously change the fixed position in the rod wall through groove (363), thereby driving the movable slide rod (360) to rotate as a whole and reciprocate back and forth, thereby driving the fixed tube body (230) to reciprocate inside the guide groove (111), thereby transporting the topmost thin paper to the top of the feeding pulley (350) through the suction nozzle (240); S7. When the movable slide rod (360) moves as a whole to the rear end, the outer convex rack (361) contacts the rod end gear (390) during the movement, thereby driving the placement rod (370) to rotate clockwise, and then the thin paper is pressed against the surface of the feeding pulley (350) through the lower pressing bar (380), thereby conveying the thin paper to the bottom of the paper guide frame (120).

Images