Double-end photo machine

Abstract

A double-head pictorial machine comprises a printing trolley which is in sliding connection with a transverse moving rail on a cross beam on the upper portion of a rack through a sliding block, a pressing wheel mechanism is installed on the lower portion of the cross beam on the upper portion, a printing platform right facing the printing trolley up and down is arranged below the pressing wheel mechanism, and an ink scraping mechanism and an ink stack are arranged at the end of the printing platform. A deviation rectifying mechanism is mounted on the outer side of the pressing wheel mechanism; according to the pictorial machine, the cam can be driven through the adjusting rod to manually adjust the printing trolley, the adjusting rod can be driven through the combination of the motor and the reduction gear set, then the cam is automatically driven to adjust the height, dual adjustment guarantee is formed, and the flexibility and convenience of use of the printing trolley can be effectively improved; a motor in the deviation rectifying mechanism automatically drives a deviation rectifying main shaft to rotate, a shifting rod arranged on the deviation rectifying main shaft rotates to press a pressing plate in a pressing wheel assembly downwards, a pressing wheel is automatically lifted, the motor rotates reversely after a printing paper strip is adjusted, the pressing plate can reset automatically, the deviation rectifying process is simple and efficient, and the printing continuity cannot be greatly influenced.

Description

Technical Field

[0001] The present invention relates to the field of photo printers, and in particular, to a dual-head photo printer. Background Art

[0002] A photo printer is a device that sprays various color patterns on special materials with nozzles. It is actually a large-format printer. Photo printers are mainly used for large-format printing in industries such as advertising, graphic arts, and CAD. Through liquid inkjet technology, ink is sprayed onto special materials to form the required patterns and texts, and high-quality color patterns can be output.

[0003] The technology of photo printers has been relatively mature, but there are still some problems in the actual production and use process. First, the fan of the printing platform is installed on the bottom surface of the platform, which generates a suction force on the printing platform. Therefore, the air flow generated by the fan suction is directly discharged into the closed area between the printing platform and the paper feeding housing, and will flow out through the gap between the platform and the paper feeding housing at the upper part of the closed area, affecting the flatness and adhesion of the paper on the platform, and further affecting the printing quality. Second, during the printing process of the photo printer, the printing paper will be subject to the resistance of the unwind and the friction force on the surface of the printing platform, and it is easy to occur that the printing paper deviates on the printing platform, affecting the printing quality. The current solution is mainly to manually lift the paper lifting rod at the end of the main shaft of the paper pressing wheel, drive the paper pressing wheel to leave the printing paper upward, and perform deviation correction adjustment. This adjustment operation method is not convenient enough and has a greater impact on the printing continuity. Third, photo printers usually set a spacing adjustment mechanism between the printing carriage and the printing platform to meet the printing of items with different materials and sizes, and accurately control the inkjet quality and printing accuracy. Currently, the printing spacing is mainly adjusted by adjusting the height of the printing carriage itself. The height adjustment of the printing carriage itself is usually achieved through a manual adjustment rod, bevel gear set, and lead screw. The manual adjustment method is relatively troublesome to operate, and mainly relies on the vertically arranged lead screw and lead screw nut to support the lifting frame and achieve height adjustment. The load-bearing capacity of the thread is limited. During the printing operation, the self-weight of the lifting frame and the nozzle assembly installed inside it, as well as the vibration of the printer itself, often cause the phenomenon of slipping of the lead screw and lead screw nut, unable to stably support the lifting frame, and affecting the accuracy of the height adjustment of the printing carriage. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a dual-head photo printer.

[0005] The technical solution of the present invention is: a double-headed photo printer, which includes a printing carriage slidably connected to a transverse movement track on the upper cross beam of the frame through a slider. A pressure wheel mechanism is installed below the upper cross beam. A paper lifting rod is provided at the outer end of the pressure wheel mechanism. A printing platform is arranged below the pressure wheel mechanism and is vertically aligned with the printing carriage. A scraping mechanism and an ink stack are provided at the end of the printing platform. The scraping mechanism and the ink stack are arranged side by side. A deviation rectifying mechanism is installed outside the pressure wheel mechanism; The printing carriage includes a back plate and a lifting vertical plate installed on the outer side of the back plate. The nozzle is connected to the lower part of the lifting vertical plate through a bottom plate and an end plate. The lifting vertical plate is slidably installed at the lower part of the outer side of the back plate. The size of the back plate is larger than that of the lifting vertical plate. Two top plates are symmetrically provided at both ends of the upper end surface of the lifting vertical plate. Both top plates are vertically and fixedly connected to the lifting vertical plate. A regulating shaft is horizontally installed in the middle of the outer side of the back plate through a fixing seat. Cam rollers supported on the surface of the top plates are installed at both ends of the regulating shaft. A boss is provided in the middle of the pressing surface of the cam roller. A driven gear is installed in the middle of the regulating shaft. A handle is installed at one end of the regulating shaft. A motor is installed on the back plate through a motor seat in the middle of the back plate. A driving gear meshing with the driven gear is installed on the back plate at the end of the motor through a support. The output shaft of the motor is connected to the axle of the driving gear; Two hanging plates are symmetrically provided at both ends of the lifting vertical plate. A hanging hole is provided at the upper end of the hanging plate. A hanging bolt is correspondingly provided at the upper part of the back plate. A tension spring is hung between the hanging bolt and the hanging plate. The tension spring is vertically connected between the hanging bolt and the hanging plate.

[0006] Preferably, the deviation rectifying mechanism includes a plurality of pressure wheel assemblies arranged side by side above the printing platform. A deviation rectifying main shaft is rotatably installed between two support plates of the platform plate inside the pressure wheel assembly. The deviation rectifying main shaft and the driving shaft of the pressure wheel assembly are arranged parallel to each other. A plurality of dial rods are equidistantly provided along the length direction of the deviation rectifying main shaft. The dial rods are connected to the deviation rectifying main shaft in the radial direction. The plurality of dial rods correspond to the plurality of pressure wheel assemblies one by one. The inner end of the dial rod is located above the pressing plate of the pressure wheel assembly and can press downward on the upper surface of the end of the pressing plate. A driving assembly for driving the deviation rectifying main shaft to rotate is installed at one end of the deviation rectifying main shaft.

[0007] Preferably, the driving assembly includes a U-shaped bracket and a reduction motor fixedly installed on the outer side of the support plate. The reduction motor is horizontally installed in the middle of the U-shaped bracket. The driving shaft of the reduction motor extends into the inside of the U-shaped bracket. The end of the deviation rectifying main shaft extends into the U-shaped bracket and a deviation rectifying gear is installed at the corresponding end of the deviation rectifying main shaft. A sector gear meshing with the deviation rectifying gear is installed on the output shaft of the reduction motor. In the non-deviation rectifying state, the exact middle of the sector gear meshes with the driving gear.

[0008] Preferably, the printing platform includes a platform plate assembly mounted on the main beam of the host by a number of brackets arranged side by side. The main beam of the host is an aluminum alloy profile. The platform plate assembly includes a suction plate body and a suction groove body installed on the bottom surface of the suction plate body. The upper port of the suction groove body is provided with a right-angled flanging. The surface of the suction plate body is densely provided with a number of suction holes. A suction chamber is formed between the suction groove body and the suction plate body. Along the length direction of the bottom surface of the suction groove body, a number of suction ports are evenly provided. There are a number of circular suction ports. A turbo fan is installed at the suction port. A guide cylinder is vertically connected to the outlet of the turbo fan. A wind outlet plate is provided at the lower end of the guide cylinder. There is a certain distance between the lower port of the guide cylinder and the wind outlet plate. The wind outlet plate is provided with grid holes corresponding to the lower port of the guide cylinder. The inner end of the wind outlet plate is fixedly connected to the outer side surface of the main beam of the host. The inner end is connected to the inner support plate of the paper feeding housing of the suction plate body. The paper feeding housing is an arc-shaped housing structure.

[0009] Preferably, the upper end surface of the bracket is provided with an adjusting compression spring. A guide post can be installed in the adjusting compression spring. A through hole is provided at the position of the suction groove body corresponding to the adjusting compression spring. The size of the through hole is larger than the size of the adjusting compression spring. The adjusting compression spring passes through the through hole and supports on the bottom surface of the suction plate body. A silica gel sleeve is provided on the outer side of the adjusting compression spring. The silica gel sleeve is hoop-shaped on the outer side surface of the adjusting compression spring. The upper end of the silica gel sleeve contacts the bottom surface of the suction plate body, and the lower end contacts the upper end surface of the bracket.

[0010] Preferably, the ink scraping mechanism includes a fixed seat with a square plate body structure, a movable seat with an L-shaped plate body structure, and a swing plate. Two adjusting long holes are vertically arranged side by side in the middle of the fixed seat. There is a certain distance between the two adjusting long holes. A nut seat corresponding to the position of the adjusting long hole is provided on the movable seat. A screw is installed between the adjusting long hole and the nut seat to lock the two. A card slot is provided on the surface of the nut of the screw. A lower support is vertically provided on the fixed seat above the adjusting long hole. A guide post is vertically installed in the middle of the lower support. The guide post and the lower support are connected by threads. An upper support is provided at the corresponding position at the upper end of the movable seat. A guide hole is provided on the upper support. The upper end of the guide post extends a certain distance out of the guide hole. The guide post is slidably sleeved in the guide hole. The swing plate is hinged to one end of the movable plate by a cross shaft. A scraping plate is installed on the inner side surface of the swing plate. The scraping plate extends upward out of the upper surface of the swing plate. One end of the swing plate is connected to a driver. A spring is sleeved on the middle of the guide post. The upper end of the spring supports on the bottom surface of the upper support, and the lower end supports on the surface of the lower support.

[0011] Preferably, the other end of the swing plate is vertically provided with a lower limit flanging. The corresponding position of the movable seat is vertically provided with an upper limit flanging A. One end of the swing plate is provided with an inclined side. The upper limit flanging B is provided on the movable seat above the inclined side.

[0012] Preferably, a gear set is provided between the output shaft of the motor and the axle of the driven gear, and the gear set includes pinion A, pinion B, large gear A and large gear B. Pinion A and pinion B have the same size, large gear A and large gear B have the same size, large gear A is connected to the axle of the driven gear, and pinion A is connected to the output shaft of the motor. An auxiliary seat is provided on one side of the support, and the auxiliary seat and the support are arranged parallel to each other with a certain distance between them. A rotating shaft is connected between the auxiliary seat and the support, and pinion B and large gear B are both installed on the rotating shaft. Pinion B and large gear B are installed side by side to save assembly space, and pinion B meshes with large gear A, and large gear B meshes with pinion A.

[0013] Preferably, a lifting slide is provided at the inner side end of the lifting vertical plate, and two lifting slides are designed side by side. A square hole matching the lifting slide is provided at the end of the back plate, and a certain gap is provided between the square hole. A vertical shaft slidingly mounted in the sliding hole of the lifting slide is fixedly connected in the square hole.

[0014] Preferably, two swing arms are symmetrically rotatably installed at both ends of the lower part of the frame, a tensioning rod is installed between the outer ends of the two swing arms, the tensioning rod is located at the lower end of the paper feeding shell of the printing platform, and a counterweight is installed between the inner ends.

[0015] The beneficial technical effects of the present invention are: (1) The adjustment shaft on the back plate of the printing carriage of the photo machine is supported on the top plate on the lifting plate through a cam, and the height adjustment is achieved by combining the tension spring between the two. The combination of the top plate and the cam has a high load-bearing capacity and can stably support the lifting plate and its outer nozzles and other components, ensuring the height adjustment accuracy of the printing carriage and long-term stable operation.

[0016] (2) The printer can manually adjust the printing carriage by driving the cam through an adjustment rod, and can also drive the adjustment rod through the combination of a motor and a reduction gear set, thereby automatically driving the cam for height adjustment, thus forming a dual adjustment guarantee and effectively improving the flexibility and convenience of using the printing carriage.

[0017] (3) The motor in the correction mechanism of the photo printer automatically drives the correction spindle to rotate. The lever set on the correction spindle can rotate to press down the pressure plate in the pressure wheel assembly, and the pressure wheel can be automatically lifted. After the print paper strip is adjusted, the motor reverses and the pressure plate can be automatically reset. The correction process is simple and efficient, and will not have a significant impact on printing continuity.

[0018] (4) The printing platform of the photo printer guides the airflow generated by the fan suction to the lower air outlet plate through the internal air guide tube, and discharges it from the grille holes set on the air outlet plate, avoiding the generation of airflow in the closed area below the suction plate body, and will not affect the flatness and fit of the paper on the platform due to the airflow flowing out from the gap, which is conducive to improving the printing quality of the platform. (5) The ink scraping mechanism of this photo printer is designed with a combined support consisting of a fixed seat and a movable seat. After loosening the screws between the two, the height of the movable seat can be adjusted. A guiding column is provided to guide the movable seat, ensuring the accuracy of the scraping plate adjustment position. A spring is set to provide elastic support force to make the scraping plate rise automatically. Therefore, the scraping plate can be adjusted conveniently and quickly to adapt to the height change caused by wear, and the service life of the scraping plate is extended. Description of the Drawings

[0019] Figure 1 is the three-dimensional structure schematic diagram of the present invention; Figure 2 is Figure 1 the sectional structure schematic diagram in the A-A direction of ; Figure 3 is Figure 2 the partial enlarged view of ; Figure 4 is the three-dimensional structure schematic diagram of the printing carriage; Figure 5 is one of the three-dimensional structure schematic diagrams of the printing carriage after removing the outer shell; Figure 6 is Figure 5 the front view structure schematic diagram of ; Figure 7 is Figure 6 the sectional structure schematic diagram in the B-B direction of ; Figure 8 is the second three-dimensional structure schematic diagram of the printing carriage after removing the outer shell; Figure 9 is the three-dimensional structure schematic diagram of the lifting vertical plate and the bottom plate; Figure 10 is the three-dimensional structure schematic diagram of the back plate; Figure 11 is the front view structure schematic diagram of the present invention after removing the frame and the components at the lower part; Figure 12 is Figure 11 the partial enlarged view of ; Figure 13 is the three-dimensional structure schematic diagram of the deviation rectifying mechanism; Figure 14 is Figure 13 the partial enlarged view; Figure 15 the three-dimensional structure schematic diagram of the printing platform I; Figure 16 is the three-dimensional structure schematic diagram of the printing platform after removing the paper feeding outer shell and the air suction plate body; Figure 17 the three-dimensional structure schematic diagram of the printing platform II; Figure 18Schematic three-dimensional structure diagram of the platform plate assembly, the turbo fan and the air guide cylinder; Figure 19 Schematic three-dimensional structure diagram of the turbo fan and the air guide cylinder; Figure 20 One of the schematic three-dimensional structure diagrams of the ink scraping mechanism; Figure 21 is Figure 20 Schematic C-C sectional structure diagram of; Figure 22 Another schematic three-dimensional structure diagram of the ink scraping mechanism; Figure 23 The third schematic three-dimensional structure diagram of the ink scraping mechanism; Figure 24 Schematic three-dimensional structure diagram of the movable plate, swing plate and scraping plate of the ink scraping mechanism.

[0020] In the figure, 001. Frame, 002. Transverse movement track, 003. Pressing wheel mechanism, 004. Ink stack, 005. Upper cross beam, 01. Printing platform, 11. Main machine cross beam, 12. Bracket, 13. Suction air plate body, 14. Suction air groove body, 141. Suction air chamber, 142. Suction air port, 15. Turbo fan, 16. Air guide cylinder, 161. Folding plate, 162. Ear plate, 17. Air outlet plate, 171. Grid holes, 172. Triangular seat, 18. Paper feeding outer shell, 181. Inner support plate, 19. Adjusting compression spring, 191. Silicone sleeve, 02 Deviation correction mechanism, 21. Pressing wheel assembly, 211. Pressing plate, 212. Pressing wheel, 22. Platform plate, 23. Support plate, 24. Deviation correction main shaft, 241. Poking rod, 242. Sector gear, 243. Bush, 25. Reduction motor, 251. Deviation correction gear, 26. U-shaped bracket, 27. Photoelectric switch, 271. Limit piece, 03. Printing carriage, 31. Back plate, 311. Slide block, 312. Motor, 313. Driving gear, 32. Lifting vertical plate, 321. Bottom plate, 322. End plate, 323. Nozzle, 324. Top plate, 325. Wear-resistant backing plate, 34. Adjusting shaft, 341. Cam, 342. Driven gear, 343. Handle, 351. Hanging plate, 352. Hanging bolt, 353. Tension spring, 361. Small gear A, 362. Small gear B, 363. Large gear A, 364. Large gear B, 365. Rotating shaft, 366. Wheel shaft, 367. Output shaft, 371. Lifting slide seat, 372. Square hole, 373. Vertical shaft, 381. Limit plate, 382. Photoelectric switch, 391. L-shaped limit elastic piece, 392. Microswitch, 393. Carriage plate cover, 394. Carriage cover, 04. Ink scraping mechanism, 41. Fixed seat, 411. Adjusting long hole, 51. Movable seat, 511. Nut seat, 512. Screw, 513. Upper support, 514. Upper limit flange A, 515. Upper limit flange B, 6. Swing plate, 61. Lower support, 611. Guide post, 612. Spring, 62. Horizontal axis, 63. Scraper, 631. Pressing plate, 64. Long circular hole, 65. Lower limit flange, 66. Inclined edge, 71. Electromagnet, 711. Core shaft, 81. Waste ink cartridge, 811. Sponge, 91. Swing arm, 92. Tension rod, 93. Counterweight, 94. Belt, 101. Unwinder, 102. Rewinder. Detailed implementation mode

[0021] Example 1, see the attached Figures 1-10 , A double-headed photo printer, including a printing carriage slidably connected to a transverse movement track on the upper cross beam of the frame through a slider. A driving assembly is installed at the end of the upper cross beam. The driving assembly drives the printing carriage to linearly move along the transverse movement track through a belt. A pressing wheel mechanism is installed below the upper cross beam. A printing platform is arranged below the pressing wheel mechanism and is vertically opposite to the printing carriage. One side of the printing platform is provided with a main shaft corresponding to the pressing wheel mechanism. A driving mechanism for driving the main shaft to rotate is provided at the end of the upper cross beam. An ink scraping mechanism and an ink stack are provided at the end of the printing platform. A deviation correction mechanism is installed outside the pressing wheel mechanism. An unwinder is provided on one side of the frame, and a rewinder is provided on the other side.

[0022] As Figures 3-5 shown, the printing carriage includes a back plate and a lifting vertical plate installed on the outer side of the back plate. The nozzle is connected to the lower part of the lifting vertical plate through a bottom plate and an end plate. The lifting vertical plate is slidably installed on the lower part of the outer side of the back plate. Two top plates are symmetrically arranged at both ends of the upper end surface of the lifting vertical plate. The top plates are vertically and fixedly connected to the lifting vertical plate. A regulating shaft is horizontally installed on the outer side of the middle part of the back plate through a fixed seat. Cam rollers supported on the surface of the top plates are installed at both ends of the regulating shaft. By rotating the regulating shaft, the cam rollers rotate and press down on the surface of the top plates, driving the lifting vertical plate to move downward. A handle is installed at one end of the regulating shaft. Two hanging plates are symmetrically arranged at both ends of the lifting vertical plate. Hanging bolts are correspondingly provided at the upper part of the back plate. A tension spring is hung between the hanging bolts and the hanging plates. The tension spring provides an upward pulling force for the lifting vertical plate. Combining with the pressing force of the cam roller, the lifting vertical plate is in a fixed state.

[0023] The inner side end of the lifting vertical plate is provided with a lifting sliding seat. The end of the back plate is provided with a square hole that is fitted and sleeved on the lifting sliding seat. A vertical shaft that is slidably sleeved in the sliding hole of the lifting sliding seat is fixedly connected inside the square hole. The lifting sliding seat is slidably connected inside the square hole through the vertical shaft. The square hole has a limiting effect on the lifting sliding seat, restricting the lifting sliding seat to slide within the length range of the square hole, playing a role in protecting the lifting vertical plate and the nozzles installed outside it, avoiding the phenomenon that the nozzles hit the printing medium due to excessive downward movement, and ensuring the safety during the height socketing process.

[0024] As Figure 6 shown, an L-shaped limiting elastic piece is installed in the middle of the end plate. A micro switch close to the L-shaped limiting elastic piece is provided on the end plate inside the L-shaped limiting elastic piece. Precise components such as nozzles are installed inside the carriage. If the carriage moves excessively due to improper control during printing, the L-shaped limiting elastic piece will touch the relevant components of the printer in time, thereby triggering the micro switch. The micro switch sends a signal to the driving motor of the carriage, and the driving motor stops running in time.

[0025] As Figure 9 shown, a wear-resistant backing plate is provided on the upper surface of the top plate. The cam is supported on the wear-resistant backing plate. By setting the wear-resistant backing plate, the top plate is protected from wear, and it is convenient to replace the wear-resistant backing plate after it is worn.

[0026] A driven gear is installed in the middle of the adjusting shaft. A motor is installed on the middle of the back plate through a motor seat. A driving gear that meshes with the driven gear is installed on the back plate at the end of the motor through a support. The output shaft of the motor is connected to the axle of the driving gear. The size of the driving gear is smaller than that of the driven gear. Starting the motor can drive the driving gear to rotate, and then drive the driven gear to rotate, driving the adjusting shaft to rotate. The smaller driving gear drives the larger driven gear to drive the adjusting shaft to rotate at a reduced speed.

[0027] As Figure 5 and Figure 6 shown, a gear set is provided between the output shaft of the motor and the axle of the driven gear. The gear set includes a small gear A, a small gear B, a large gear A, and a large gear B. The large gear A is connected to the axle of the driven gear. The small gear A is connected to the output shaft of the motor. An auxiliary seat is provided on one side of the support. A rotating shaft is connected between the auxiliary seat and the support. The small gear B and the large gear B are both installed on the rotating shaft. The small gear B and the large gear B rotate synchronously with the rotating shaft, and the small gear B meshes with the large gear A, and the large gear B meshes with the small gear A. The motor drives the small gear A to rotate. The small gear A drives the large gear B and the small gear B to rotate synchronously. The large gear B drives the large gear A to rotate. The large gear A drives the driving gear to rotate through the axle, and then drives the adjusting shaft to rotate through the driven gear.

[0028] A limiting plate is provided radially at the end of the adjusting shaft. An optical coupling switch A is provided on the end plate, and the limiting plate corresponds to the position A of the optical coupling switch A. After the adjusting shaft drives the limiting plate to rotate a certain angle, the limiting plate triggers the optical coupling switch A, and the optical coupling switch A sends a limiting signal to the controller of the motor, and the motor stops driving, avoiding the phenomenon that the lifting vertical plate is adjusted too much and the nozzle is damaged.

[0029] When manually adjusting the height of the printing carriage: ① Hold the handle and rotate the adjusting shaft clockwise, and the cam rotates accordingly and presses down on the surface of the top plate. The lifting slide seat at the end of the lifting vertical plate slides down along the vertical shaft. At the same time, the hanging plate pulls down the tension spring, and the lifting vertical plate descends to adjust the height. ② Hold the handle and rotate the adjusting shaft counterclockwise, and the cam rotates upward and leaves the top plate. Under the pulling force of the spring, the lifting slide seat at the end of the lifting vertical plate slides up along the vertical shaft, and the lifting vertical plate rises to adjust the height.

[0030] When the motor automatically adjusts the height of the printing carriage: ① Start the motor to drive the pinion A to rotate. The pinion A drives the large gear B to rotate to achieve primary deceleration. At the same time, the large gear B and the pinion B rotate synchronously under the action of the rotating shaft. ② The pinion B rotates to drive the large gear A to rotate for secondary deceleration. The large gear A drives the driving gear to rotate through the wheel shaft, and the driving gear drives the driven gear to rotate to achieve tertiary deceleration. ③ The driven gear drives the adjusting shaft to rotate between the two fixed seats, driving the cams at both ends to rotate. ④ By controlling the forward and reverse rotation of the motor, each gear is driven to rotate forward or reverse, driving the adjusting shaft and the cam to rotate forward or reverse. The cam presses or releases the top plate at the end of the lifting vertical plate, combined with the pulling force applied by the tension spring to the lifting vertical plate, to achieve automatic adjustment of the height of the printing carriage.

[0031] Example 2, see the attached instructions Figure 3 、 11 -14. On the basis of Example 1, in this embodiment, the deviation correction mechanism is designed to include a plurality of pressure wheel assemblies arranged side by side above the printer platform plate. A deviation correction main shaft is rotatably installed between the two support plates of the platform plate inside the pressure wheel assembly. A plurality of dial rods are equidistantly arranged along the length direction of the deviation correction main shaft. The plurality of dial rods correspond to the plurality of pressure wheel assemblies one by one. The inner end of the dial rod is located above the pressing plate of the pressure wheel assembly. The dial rod is a cylindrical rod, and a fillet is provided at the outer end of the dial rod. When the dial rod rotates downward, its lower end can press on the surface of the pressing plate. A driving component for driving the deviation correction main shaft to rotate is installed at one end of the deviation correction main shaft. The driving component automatically drives the deviation correction main shaft to rotate. The dial rod arranged on the deviation correction main shaft rotates to press down the pressing plate in the pressure wheel assembly, and the pressure wheel is automatically lifted.

[0032] The deviation rectifying main shaft is provided with mounting holes, and the lever is connected to the mounting holes by threads. This connection structure can conveniently adjust the protruding length of the lower end of the lever. Moreover, the deviation rectifying main shaft is a hexagonal shaft, and the deviation rectifying main shaft is rotatably connected to the support plate through a bushing. A hexagonal hole matching the size of the deviation rectifying main shaft is provided in the bushing. The hexagonal shaft is convenient for installing the lever and the gear, and both the assembly and disassembly are relatively convenient, which is beneficial to the later maintenance.

[0033] The driving assembly includes a U-shaped bracket and a reduction motor fixedly installed on the outer side surface of the support plate. The reduction motor is horizontally installed in the middle of the U-shaped bracket. A through hole is provided in the middle of the U-shaped bracket. The driving shaft of the reduction motor extends into the U-shaped bracket from the through hole. The end of the deviation rectifying main shaft extends into the U-shaped bracket, and a driven gear is installed at the end of the deviation rectifying main shaft. A deviation rectifying gear meshing with the driven gear is installed on the output shaft of the reduction motor.

[0034] When the driving assembly works, ① start the reduction motor to drive the deviation rectifying gear to rotate. The deviation rectifying gear drives the driven gear to rotate, and the driven gear drives the deviation rectifying main shaft to rotate. ② Each lever on the deviation rectifying main shaft rotates downward synchronously, correspondingly pressing the outer end of the pressing plate of each pressure wheel assembly. The pressure wheel at the other end of the pressing plate lifts upward, releasing the pressing on the printing paper. ③ Then adjust and rectify the printing paper. ④ After rectification, the reduction motor reverses, and each lever lifts upward away from the pressing plate. The pressing plate automatically resets, and the pressure wheel presses the printing paper again. The rectification process is simple and efficient, and will not have a great impact on the printing continuity.

[0035] The driven gear is a sector gear. The deviation rectifying gear meshes with the sector gear below. The overall size of the deviation rectifying gear is smaller than the overall size of the sector gear. After the deviation rectifying gear drives the sector gear to rotate and move an angle, the sector gear leaves the deviation rectifying gear, and the two are no longer meshed. Even if the motor continues to drive the deviation rectifying gear, it cannot drive the deviation rectifying main shaft to rotate. And an opto-coupler switch B is installed on the ear plate at one end of the U-shaped bracket. A limit piece corresponding to the position of the opto-coupler switch B is installed on the side surface of the driven gear. After the limit piece rotates a certain angle along with the sector gear, the limit piece triggers the opto-coupler switch B, and the opto-coupler switch B sends a signal to the controller of the motor, and the motor stops running. The sector gear and the opto-coupler switch B form a double protection for the deviation rectifying main shaft, avoiding the phenomenon that the deviation rectifying main shaft rotates too much and presses the pressure wheel assembly, and ensuring the stability and safety of the rectification process.

[0036] Example 3, see the attached instructions Figures 15-19, on the basis of the first embodiment, the printing platform is designed to include a platform plate assembly mounted on the main beam of the host through a number of brackets arranged side by side. The platform plate assembly includes a suction plate body and a suction groove body mounted on the bottom surface of the suction plate body. A vertical flanging is provided at the upper port of the suction groove body and is fixedly connected to the bottom surface of the suction plate body through this vertical flanging. A suction chamber is formed between the suction groove body and the suction plate body. A number of suction ports communicating with the suction chamber are evenly provided along the length direction of the bottom surface of the suction groove body. A turbo fan is installed at the suction port. A wind guide cylinder is vertically connected to the outlet of the turbo fan. The outlet of the turbo fan extends into the inlet at the upper end of the wind guide cylinder; a wind outlet plate is provided at the lower end of the wind guide cylinder. Grid holes corresponding to the lower port of the wind guide cylinder are provided on the wind outlet plate. The airflow discharged from the wind guide cylinder can be discharged from the grid holes in time. The inner end of the wind outlet plate is fixedly connected to the outer side surface of the main beam of the host and is connected to the inner support plate of the paper feeding housing of the suction plate body. The wind outlet plate is a horizontally arranged plate body, and a right-angle bending structure for improving the anti-deformation strength is provided in the middle of the inner support plate.

[0037] Two ear plates are symmetrically provided on both sides of the docking port at the upper end of the wind guide cylinder. The wind guide cylinder is connected to the bottom surface of the suction groove body through the ear plates. A screw hole is provided in the middle of the ear plate, and a screw is installed in the screw hole to fixedly connect the wind guide cylinder to the bottom surface of the suction groove body. The wind guide cylinder is of a square cylinder structure, and a folding plate is provided at its upper end to form a contracted docking port structure. This closing structure is used for matching and docking with the outlet of the turbo fan on the one hand, and plays a role in downward air diversion on the other hand, improving the air diversion effect. End plates are installed at both ends of the paper feeding housing and its inner support plate.

[0038] The wind outlet plate is connected to the lower part of the side surface of the main beam of the host through a number of triangular seats arranged side by side, ensuring the stability of the fixed connection of the wind outlet plate on the main beam of the host.

[0039] An adjusting compression spring is provided on the upper end surface of the bracket. A through hole is provided at the position of the suction groove body corresponding to the adjusting compression spring. The adjusting compression spring passes through this through hole and supports on the bottom surface of the suction plate body. A silica gel sleeve is provided outside the adjusting compression spring. A small gap is left between the through hole and the silica gel sleeve to ensure that the silica gel sleeve can deform elastically normally and does not affect the stability of the negative pressure inside the suction chamber. The upper end of the silica gel sleeve contacts the bottom surface of the suction plate body, and the lower end contacts the upper end surface of the bracket. The adjusting spring sleeved with the silica gel sleeve can provide an elastic supporting force for the suction plate body to offset the elastic deformation force generated by external forces during the printing process of the suction plate body, ensuring the flatness and stability of the suction plate body.

[0040] When the printing platform is working, the turbine fan starts to suck air into the chamber inside the air suction trough body, creating a negative pressure inside the air suction chamber. The negative pressure acts on the upper surface of the air suction plate body through the small holes on the air suction plate body, adsorbing the printing medium. During the printing process, the turbine fan guides the airflow generated by the air suction to the lower air outlet plate through the air guide cylinder and discharges it in a timely manner through the grid holes provided on the air outlet plate, avoiding the generation of airflow in the closed area at the lower part of the air suction plate body. The airflow will not flow out from the gap between the air suction plate body and the paper feeding outer shell, which will not affect the flatness and adhesion of the printing medium on the platform and ensure the printing quality of the printing medium on the platform.

[0041] Embodiment 4, see the attached drawings of the specification Figures 20-24 , on the basis of Embodiment 1, this embodiment designs the ink scraping mechanism to include a fixed seat with a square plate body structure, a movable seat with an L-shaped plate body structure, and a swing plate; two adjusting long holes are arranged side by side vertically in the middle of the fixed seat, and a nut seat corresponding to the position of the adjusting long holes is provided on the movable seat. Screws are installed between the adjusting long holes and the nut seat to lock the two. After loosening the screws, the locking of the fixed seat and the movable seat is released, and the height of the movable plate can be adjusted under the action of the adjusting long holes, thereby adjusting the height of the scraping plate; the swing plate is hinged to one end of the movable plate through a horizontal shaft, and the swing plate can swing up and down with this horizontal shaft as the fulcrum. An ink scraping plate is installed on the inner side surface of the swing plate, and the ink scraping plate is fixed on the inner side surface of the swing plate through a pressing piece, and the pressing piece and the swing plate are fixedly connected by screws.

[0042] One end of the swing plate is connected with a driver, the driver is an electromagnet, and this electromagnet is fixedly connected with the movable seat. A long circular hole is provided at the end of the swing plate, and this long circular hole is arranged along the length direction of the swing plate. The upper end of the core shaft of the electromagnet is slidably connected with this long circular hole, and the swing plate is driven by the electromagnet to swing up and down with the horizontal shaft as the fulcrum.

[0043] A space is formed on the fixed seat between the movable seats with an L-shaped plate body structure. An ink waste cartridge is installed in this space. The length of this ink waste cartridge is greater than the length of the scraping plate, ensuring that it can receive the ink scraped off by the scraping plate. A sponge is placed in the ink waste cartridge, and the size of the sponge matches the size of this ink waste cartridge. The ink is absorbed and fixed by the sponge, avoiding the phenomenon that the ink splashes due to shaking when the ink cartridge is full and disassembled.

[0044] The scraping plate is a rubber plate, and the rubber material has a certain flexibility to avoid scratching the print head. A number of round holes are evenly arranged on the swing plate to reduce the self-weight of the swing plate.

[0045] A lower support is provided on the fixed seat above the adjusting long hole. A guiding column is vertically installed in the middle of the lower support. An upper support is provided at the corresponding position at the upper end of the movable seat. A guiding hole is provided on the upper support. The guiding column is slidably sleeved in the guiding hole. One end of the guiding column extends out of the guiding hole by a certain distance, and this distance is the height adjustment range of the movable seat. When the height of the movable seat is adjusted by loosening the screw, the guiding column and the guiding hole can provide guidance for the movable seat to ensure the accuracy of the adjusting position of the squeegee and avoid position deviation after adjustment. A spring is sleeved in the middle of the guiding column. The upper end of the spring supports on the bottom surface of the upper support, and the lower end supports on the surface of the lower support. The elastic supporting force provided by the spring can make the squeegee rise automatically, which can conveniently and quickly adjust the squeegee to adapt to the height change caused by wear and improve the service life of the squeegee.

[0046] A lower limit flanging is provided at the other end of the swing plate, and an upper limit flanging A is provided at the corresponding position of the movable seat. When the swing plate and the squeegee are driven by the electromagnet to rise and scrape the ink by the lever principle, the lower limit flanging will contact the upper limit flanging A to provide a limit for the squeegee and avoid the phenomenon that the printing head is damaged due to excessive squeegee pressure caused by improper operation or failure. A bevel edge is provided at one end of the swing plate, and an upper limit flanging B is provided on the movable seat above the bevel edge. When the squeegee returns to its original position after scraping the ink, the bevel edge and the upper limit flanging B are used to provide a limit for the return to avoid the phenomenon that the squeegee swings downward too much and damages the components such as the waste ink cartridge below.

Claims

1. A double-headed photo printer, characterized in that: It includes a printing carriage slidably connected to the transverse movement track on the upper cross beam of the frame through a slider. A pressure wheel mechanism is installed below the upper cross beam. A printing platform facing the printing carriage vertically is arranged below the pressure wheel mechanism. A scraping ink mechanism and an ink stack are provided at the end of the printing platform. A deviation rectifying mechanism is installed outside the pressure wheel mechanism. The printing carriage includes a back plate and a lifting vertical plate installed on the outer side of the back plate. The nozzle is connected to the lower part of the lifting vertical plate through a bottom plate and an end plate. The lifting vertical plate is slidably installed on the lower part of the outer side of the back plate. Two top plates are symmetrically arranged at both ends of the upper end face of the lifting vertical plate. A regulating shaft is horizontally installed in the middle of the outer side of the back plate through a fixing seat. Cam rollers supported on the surface of the top plates are installed at both ends of the regulating shaft. A driven gear is installed in the middle of the regulating shaft. A handle is installed at one end of the regulating shaft. A motor is installed on the back plate through a motor seat in the middle of the back plate. A driving gear meshing with the driven gear is installed on the back plate at the end of the motor through a support. The output shaft of the motor is connected to the axle of the driving gear. Two hanging plates are symmetrically arranged at both ends of the lifting vertical plate. Hanging bolts are correspondingly arranged at the upper part of the back plate. A tension spring is hung between the hanging bolt and the hanging plate.

2. The double-headed photo printer according to claim 1, characterized in that: The deviation rectifying mechanism includes a plurality of pressure wheel assemblies arranged side by side above the printing platform. A deviation rectifying main shaft is rotatably installed between two support plates of the platform plate inside the pressure wheel assembly. A plurality of dial rods are equidistantly arranged along the length direction of the deviation rectifying main shaft. The plurality of dial rods correspond to the plurality of pressure wheel assemblies one by one. The inner end of the dial rod is located above the pressing plate of the pressure wheel assembly. A driving component for driving the deviation rectifying main shaft to rotate is installed at one end of the deviation rectifying main shaft.

3. The double-headed photo printer according to claim 2, characterized in that: The driving component includes a U-shaped bracket and a reduction motor fixedly installed on the outer side of the support plate. The reduction motor is horizontally installed in the middle of the U-shaped bracket. The end of the deviation rectifying main shaft extends into the U-shaped bracket and a deviation rectifying gear is installed at the corresponding end of the deviation rectifying main shaft. A sector gear meshing with the deviation rectifying gear is installed on the output shaft of the reduction motor.

4. A double-headed photo printer according to claim 1, characterized in that: The printing platform includes a platform plate assembly installed on the main machine cross beam through a plurality of brackets arranged side by side. The platform plate assembly includes a suction air plate body and a suction air groove body installed on the bottom surface of the suction air plate body. A suction air chamber is formed between the suction air groove body and the suction air plate body. A plurality of suction air openings are evenly arranged along the length direction of the bottom surface of the suction air groove body. A turbo fan is installed at the suction air opening. A wind guide cylinder is vertically connected to the outlet of the turbo fan. An air outlet plate is provided at the lower end of the wind guide cylinder. Grid holes corresponding to the lower port of the wind guide cylinder are provided on the air outlet plate. The inner end of the air outlet plate is fixedly connected to the outer side surface of the main machine cross beam and the inner end is connected to the inner support plate of the paper feeding outer shell of the suction air plate body.

5. A double-headed photo printer according to claim 4, characterized in that: A regulating compression spring is provided on the upper end surface of the bracket. A through hole is provided at the position of the suction air groove body corresponding to the regulating compression spring. The regulating compression spring passes through the through hole and supports on the bottom surface of the suction air plate body. A silica gel sleeve is provided outside the regulating compression spring. The upper end of the silica gel sleeve contacts the bottom surface of the suction air plate body and the lower end contacts the upper end surface of the bracket.

6. The double-headed photo printer according to claim 1, characterized in that: The described ink scraping mechanism includes a fixed seat with a square plate structure, a movable seat with an L-shaped plate structure, and a swing plate; two adjusting long holes are arranged vertically and side by side in the middle of the fixed seat, a nut seat corresponding to the position of the adjusting long hole is arranged on the movable seat, and screws are installed between the adjusting long hole and the nut seat to lock the two; a lower support is arranged on the fixed seat above the adjusting long hole, a guiding column is vertically installed in the middle of the lower support, an upper support is arranged at the corresponding position at the upper end of the movable seat, a guiding hole is arranged on the upper support, and the guiding column is slidably sleeved in the guiding hole; the swing plate is hinged to one end of the movable plate through a transverse shaft, a scraping plate is installed on the inner side surface of the swing plate, one end of the swing plate is connected with a driver, a spring is sleeved in the middle of the guiding column, the upper end of the spring supports on the bottom surface of the upper support, and the lower end supports on the surface of the lower support.

7. The double-headed photo printer according to claim 6, characterized in that: A lower limit flanging is arranged at the other end of the swing plate, an upper limit flanging A is arranged at the corresponding position of the movable seat, a hypotenuse is arranged at one end of the swing plate, and an upper limit flanging B is arranged on the movable seat above the hypotenuse.

8. A double-headed photo printer according to claim 1, characterized in that: A gear set is arranged between the output shaft of the motor and the wheel shaft of the driven gear. The gear set includes a small gear A, a small gear B, a large gear A, and a large gear B. The large gear A is connected with the wheel shaft of the driven gear, the small gear A is connected with the output shaft of the motor, an auxiliary seat is arranged on one side of the support, a rotating shaft is connected between the auxiliary seat and the support, both the small gear B and the large gear B are installed on the rotating shaft, and the small gear B meshes with the large gear A, and the large gear B meshes with the small gear A.

9. A double-headed photo printer according to claim 1, characterized in that: A lifting sliding seat is arranged at the end of the inner side surface of the lifting vertical plate, a square hole that is fitted and sleeved on the lifting sliding seat is arranged at the end of the back plate, and a vertical shaft that is slidably sleeved in the sliding hole of the lifting sliding seat is fixedly connected in the square hole.

10. A double-headed photo printer according to claim 1, characterized in that: Two swing arms are symmetrically and rotatably installed at both ends of the lower part of the frame, a tension rod is installed between the outer ends of the two swing arms, the tension rod is located at the lower end of the paper feeding housing of the printing platform, and a counterweight is installed between the inner ends.

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