An inkjet printing device

Abstract

This invention relates to an inkjet printing apparatus, comprising a transport platform, a printing carriage, and an optical inspection device. The transport platform is located at the upper end of a base and is used to carry and transport printing media. The printing carriage and the optical inspection device are mounted on the base and located above the transport platform. The optical inspection device is located above the right end of the transport platform and spans the platform longitudinally. The printing carriage is located to the left of the optical inspection device and can move back and forth relative to the transport platform. The transport platform includes a drive device and several conveying devices arranged side-by-side at intervals. The drive device drives the conveying devices to rotate, thereby transporting the printing media from right to left. This invention can be embedded in an automotive glass printing production line, integrating optical inspection and inkjet printing, realizing automated printing of variable data on glass plates, and laying a solid foundation for the application of inkjet printing technology in the automotive glass printing industry.

Description

Technical Field

[0001] This invention relates to the field of inkjet printing equipment technology, and more specifically to an inkjet printing device. Background Technology

[0002] Automotive glass is ubiquitous in daily life. It can be broadly categorized into windshields, rear windshields, door windows, triangular windows, and sunroofs. From a manufacturing perspective, automotive glass processing mainly involves three steps: cutting large sheets, grinding, washing, and drying, and printing. The printing step primarily involves three elements: the black border, the heating line, and the logo. Traditional automotive glass printing uses screen printing. Glass screen printing utilizes a screen printing plate and glass enamel to print onto glass products. Glass enamel, also known as glass ink, is a paste-like printing material composed of colorants and binders. The colorants consist of inorganic pigments and low-melting-point flux (lead glass powder), while the binder is commonly referred to as "sheet oil" in the glass screen printing industry. After printing, the glass products need to be fired in a furnace at a temperature of 520–600℃ to solidify the enamel on the glass surface, forming the pattern.

[0003] However, glass screen printing is prone to quality problems such as ink smearing, pinholes, air bubbles in the ink, overprinting, and spot-like appearance in both image and shadow areas. These problems are mostly caused by the printing environment, the special properties of glass inks, and inherent defects in the screen printing plate itself. For example, if the glass surface is not properly cleaned and contains watermarks, fingerprints, oil stains, dust particles, or other contaminants, ink smearing can occur. Excessive workshop temperature or low relative humidity can cause the volatile solvents in the glass ink to evaporate quickly, while low workshop temperature can reduce the fluidity of the glass ink, increasing its viscosity and clogging the screen printing plate's mesh. Alternatively, the colorant in the glass ink may separate from the solvent, causing sedimentation and further clogging the screen printing plate's mesh, thus affecting print quality. Furthermore, with the advent of the information age, the production of automotive glass is constantly adapting to the needs of the times. For example, the corner mark on the windshield will gradually evolve into a QR code representing the identity of each vehicle. The QR code can trace the country of origin, manufacturing company or manufacturer (to check the transaction price, specifications, and preferential policies), model, brand name, vehicle series, body style, engine model, vehicle model, safety protection device model, inspection number, assembly plant name, and factory number, etc. Information such as the engine, transmission, and braking system configured by the vehicle manufacturer can also be scanned and read. Therefore, the printing of automotive corner marks has become close to personalized customization. Traditional screen printing, due to the limitations of plate making, cannot meet personalized needs.

[0004] Therefore, the method of printing logos, black edges, heating lines, etc. on automotive glass using inkjet printers with variable data inkjet printing technology has emerged to meet the personalized customization needs of automotive glass. When printing with an inkjet printer, compared to traditional printing media such as paper, cloth, and wood, automotive glass, as the printing medium, must first undergo optical inspection to check for defects or dust contamination that could affect the quality of the printed glass. The transport position, edge position, and tilt of the glass medium must also be checked. Then, the printing device prints the image, and finally, a quality inspection device checks the print quality to ensure it meets standards, such as whether a QR code can be recognized.

[0005] Based on the aforementioned functional requirement of printing on automotive glass using variable data inkjet printing technology with an inkjet printer, the present invention provides a printing device that can print variable corner marks on automotive glass and achieve good print quality. Summary of the Invention

[0006] The present invention aims to provide an inkjet printing device to overcome the shortcomings of the prior art. The technical problem to be solved by the present invention is achieved through the following technical solution.

[0007] An inkjet printing apparatus includes a transport platform, a printing carriage, and an optical inspection device. The transport platform is located on the upper end of a base and is used to carry and transport printing media. The printing carriage and the optical inspection device are mounted on the base and located above the transport platform. The optical inspection device is located above the right end of the transport platform and spans the transport platform longitudinally. The printing carriage is located to the left of the optical inspection device and can move back and forth relative to the transport platform. The transport platform includes a drive device and several conveying devices arranged side by side at intervals. The conveying devices are fixedly mounted on the base by a fixing device, the height of which is adjustable. The drive device drives the conveying devices to rotate, thereby transporting the printing media from right to left. The optical inspection device includes an emitting end located below the printing media and a detection end located above the printing media. The conveying device includes a first conveying section and a second conveying section located to the left of the first conveying section. The emitting end of the optical inspection device is located between the first and second conveying sections. The first and second conveying sections are respectively connected to the drive device, and the drive device drives the first and second conveying sections to rotate synchronously.

[0008] Preferably, the first transmission part includes a support beam I, a main transmission part, side parts, and a synchronous belt I. The main transmission part is located below the support beam I near the center. There are two side parts, symmetrically arranged at the left and right ends of the support beam I. The height of the side parts is slightly higher than the upper surface of the support beam I. The main transmission part includes a drive pulley. The driving device is connected to the drive pulley and is used to drive the drive pulley to rotate. Idler pulleys and tension pulleys are respectively arranged on the left and right sides of the drive pulley. The side parts include several idler pulleys. The synchronous belt I is wound around the periphery of the support beam I through the drive pulley, idler pulleys, and tension pulleys. The drive pulley is used to drive the synchronous belt I to rotate. The idler pulleys are used to guide and tension the synchronous belt I. The tension pulley is used to adjust the tension of the synchronous belt I.

[0009] Preferably, the main drive unit includes mounting plates I fixedly installed on the front and rear sides of the support beam I, respectively. The mounting plates I are used to install the drive pulley, idler pulley and tension pulley of the main drive unit, and the height of the tension pulley is adjustable relative to the height of the drive pulley.

[0010] Preferably, the mounting plate I is provided with a mounting block, an adjusting pin is inserted inside the mounting block, the axle of the tension pulley is provided with a threaded hole that matches the adjusting pin, and the lower end of the adjusting pin is engaged with the threaded hole.

[0011] Preferably, the second conveying unit includes a support beam II, a main drive unit, a side part, a first clearance part, and a synchronous belt II. The main drive unit is located below the support beam II. There are two side parts, which are symmetrically arranged at the left and right ends of the support beam II. The height of the side parts is slightly higher than the upper surface of the support beam II. An ink collection groove is provided on the conveying platform below the printing carriage. The length of the ink collection groove matches the width of the conveying platform. The first clearance part is located on the left side of the main drive unit and below the printing carriage. The first clearance part is used to avoid the ink collection groove. The upper end of the first clearance part is flush with the upper end of the side part, and the lower end is lower than the lower end of the side part. The first clearance part includes several idler pulleys. The synchronous belt II is connected to the drive pulley, tension pulley, and idler pulley of the second conveying unit and is sleeved around the periphery of the support beam II. The idler pulleys are used to guide and tension the synchronous belt II.

[0012] Preferably, the first clearance part includes mounting plates III fixedly installed on the front and rear sides of the support beam II, respectively. The mounting plates III are used to install idler wheels of the first clearance part. The first clearance part has five idler wheels, of which four idler wheels are used to guide and tension the part of the synchronous belt II located above the support beam II, and the other idler wheel is used to tension the part of the synchronous belt II located below the support beam II.

[0013] Preferably, a quality inspection device is also installed on the base. The quality inspection device is located on the left side of the printing carriage and spans the conveying platform longitudinally. The second conveying part also includes a second clearance part, which is located below the quality inspection device and is used to clear the inspection position of the quality inspection device. The second clearance part includes several idler wheels, which are used to guide and tension the part of the synchronous belt II located above the support beam II. The upper end of the second clearance part is flush with the upper end of the side part.

[0014] Preferably, the driving device includes a motor, the output end of which is fixedly connected to the main drive shaft, the main drive shaft passes through the drive pulley and is fixedly connected to the drive pulley, and an encoder is provided at the end of the main drive shaft.

[0015] Preferably, the fixing device includes a fixing base and an adjusting block. The lower end of the fixing base is fixedly connected to the base, and the upper end of the fixing base is fixedly connected to the conveying device. The adjusting block is located above the fixing base and fixedly installed on the conveying device. An adjusting pin is passed through the adjusting block, and the lower end of the adjusting pin abuts against the fixing base.

[0016] Preferably, the base includes a plurality of longitudinally arranged and spaced apart from each other, with a mounting plate fixedly installed on the upper end of the mounting bracket, and the lower end of the fixing device fixedly connected to the mounting plate.

[0017] In operation, the printing medium moves from the previous station to the conveying platform. The driving device drives each conveying device, which is spaced apart, to rotate, thereby conveying the printing medium from right to left. In this embodiment, the printing medium is a glass plate. The glass plate first passes under the optical inspection device, which detects whether the glass plate contains air bubbles or whether there are impurities on the surface that affect printing. If the glass plate has defects that cause it to fail to meet requirements, the operator is notified to replace the glass plate or clean it promptly. The optical inspection device also detects and records information such as the edge position and whether the edge is tilted, and feeds this information back to the printing system. This allows the system to adjust the position and direction of the printhead so that the printed image is in the correct position on the glass plate. The optical inspection device also records the time it takes for the glass plate to enter the optical inspection area and calculates the time it takes for the glass plate to enter the printing area in conjunction with the rotational speed of the conveying device, thus determining the start time of printing. After the glass plate is transported from right to left to the bottom of the printing carriage, the printing nozzle on the printing carriage begins to print. After printing is completed, the glass plate continues to move to the next station.

[0018] The present invention provides an inkjet printing device that can be embedded in the production line of automotive glass printing. It integrates optical inspection and inkjet printing, realizes automated printing of variable data on glass plates, and lays a good foundation for the application of inkjet printing technology in the automotive glass printing industry. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the installation of the conveying device on the base in this invention;

[0021] Figure 3 This is a side view of the conveying device in this invention.

[0022] Figure 4 This is a schematic diagram of the structure of the first transmission unit in this invention;

[0023] Figure 5 This is a schematic diagram of the structure of the second transmission unit in this invention;

[0024] The reference numerals in the attached drawings are as follows: 1. Base; 11. Mounting plate; 2. Conveying platform; 21. Conveying device; 211. Main drive unit; 212. Side part; 213. First clearance part; 214. Second clearance part; 22. Drive unit; 23. Fixing device; 231. Fixing seat; 232. Adjusting block; 233. Adjusting pin; 3. Printing carriage; 31. Ink collection tank; 4. Optical inspection device; 5. Quality inspection device. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] In this invention, the front, back, left, and right directions refer to... Figure 1 Please refer to the image below. Figure 1 The left side of the middle is left, and the right side is right. Figure 1 The front side shown is the front, and the rear side is... Figure 1 Not shown in the image.

[0027] Example 1:

[0028] An inkjet printing device is improved in that it includes a transport platform 2, a printing carriage 3, and an optical inspection device 4. The transport platform 2 is located on the upper end of a base 1 and is used to carry and transport printing media. The printing carriage 3 and the optical inspection device 4 are mounted on the base 1 and located above the transport platform 2. The optical inspection device 4 is located above the right end of the transport platform 2 and spans the transport platform 2 longitudinally. The printing carriage 3 is located to the left of the optical inspection device 4 and can move back and forth relative to the transport platform 2. The transport platform 2 includes a drive device 22 and several conveying devices 21 arranged side by side at intervals. The drive device 22 drives the conveying devices 21 to rotate, thereby transporting the printing media from right to left.

[0029] Reference Figure 1 and Figure 2 As shown, the conveying platform 2 is located on the upper end of the base 1. The printing medium is placed on the conveying platform 2. A longitudinally arranged guide beam is mounted on the base 1. The printing carriage 3 is mounted on the guide beam and can move back and forth along the guide beam. The printing carriage 3 is equipped with a printing nozzle, which is used to spray ink droplets onto the printing medium to complete the printing of the pattern. The conveying platform 2 includes several transversely arranged and spaced-ahead conveying devices 21. The length of the conveying device 21 matches the length of the base 1. A partition is provided between adjacent conveying devices 21. The upper surface of the partition is slightly lower than the upper surface of the conveying device 21. The partition serves two purposes: firstly, it blocks the gaps between the conveying devices 21, preventing debris from falling into the base 1 and affecting the operation of the drive device 22, thus improving safety and reliability; secondly, it also serves a certain aesthetic purpose.

[0030] During operation, the printing medium moves from the previous station to the conveyor platform 2. The drive device 21 drives each conveyor device 21, which is spaced back and forth, to rotate, thereby conveying the printing medium from right to left. In this embodiment, the printing medium is a glass plate. The glass plate first passes under the optical inspection device 4. The optical inspection device 4 detects whether the glass plate contains air bubbles or whether there are impurities on the surface of the glass plate that affect printing. If the glass plate has defects that cause it to fail to meet the requirements, the staff is notified to replace the glass plate or clean it in time. The optical inspection device 4 also detects and records information such as the position of the edge line of the glass plate and whether the edge line is tilted, and feeds it back to the printing system, thereby adjusting the position and direction of the pattern printed by the print head so that the printed pattern is in a suitable position on the glass plate. The optical inspection device 4 also records the time when the glass plate enters the optical inspection area and calculates the time when the glass plate enters the printing area in conjunction with the rotation speed of the conveyor device 21, thereby determining the start time of printing. After the glass plate is transported from right to left to the bottom of the printing carriage 3, the printing nozzle on the printing carriage 3 begins to print. After printing is completed, the glass plate continues to move to the next station.

[0031] This embodiment provides an inkjet printing device that can be embedded in an automotive glass printing production line. It integrates optical inspection and inkjet printing, enabling automated printing of variable data on glass plates and laying a solid foundation for the application of inkjet printing technology in the automotive glass printing industry.

[0032] Furthermore, the conveying device 21 is fixedly installed on the base 1 by a fixing device 23. The height of the fixing device 23 is adjustable, and there are multiple fixing devices 23 arranged at intervals on the left and right.

[0033] Furthermore, the fixing device 23 includes a fixing base 231 and an adjusting block 232. The lower end of the fixing base 231 is fixedly connected to the base 1, and the upper end of the fixing base 231 is fixedly connected to the conveying device 21. The adjusting block 232 is disposed above the fixing base 231 and fixedly installed on the conveying device 21. An adjusting pin 233 is passed through the adjusting block 232, and the lower end of the adjusting pin 233 abuts against the fixing base 231. By rotating the adjusting pin 233, the length of the adjusting pin 233 extending out of the lower end face of the adjusting block 232 is adjusted to adjust the distance between the adjusting block 232 and the fixing base 231, thereby adjusting the height of the fixing device 23, and thus adjusting the height of the transmission device 21 relative to the base 1.

[0034] Furthermore, the base 1 includes several longitudinally arranged and spaced apart from each other, with an mounting plate 11 fixedly mounted on the upper end of the mounting plate, and the lower end of the fixing device 23 fixedly connected to the mounting plate 11.

[0035] In this embodiment, the mounting plate 11 is a machined part. The mounting plate 11 is used as a positioning reference. The conveying device 21 is installed on the mounting plate 11 by the fixing device 23 and thus fixed on the base 1. The height of the fixing device 23 is adjustable. The height of the conveying device 21 can be finely adjusted by adjusting the height of the fixing device 23 so that the upper surface of the conveying device is kept horizontal, so as to avoid the printed pattern being skewed or the resolution not meeting the requirements, thereby improving the printing quality.

[0036] Example 2:

[0037] Based on Embodiment 1, the optical detection device 4 includes an emitting end located below the printing medium and a detection end located above the printing medium. The conveying device 21 includes a first conveying section and a second conveying section located to the left of the first conveying section. The emitting end of the optical detection device 4 is located between the first conveying section and the second conveying section. The first conveying section and the second conveying section are respectively connected to the driving device 22. The driving device 22 drives the first conveying section and the second conveying section to perform synchronous rotational motion.

[0038] In this embodiment, refer to Figure 1 and Figure 3 As shown, the glass plate is transparent. The transmitting end of the optical detection device 4 emits light and other photoelectric signals from the bottom of the glass plate. Based on the photoelectric information received by the detection end, it is determined whether there are defects such as bubbles or impurities on the glass plate. Since the transmitting end and the detection end need to be placed on the upper and lower sides of the glass plate respectively, the transmission device 21 needs to make way for the transmitting end. Therefore, it is divided into a first transmission section and a second transmission section to provide space for the transmitting end.

[0039] Furthermore, the first transmission unit includes a support beam I, a main transmission unit 211, side parts 212, and a synchronous belt I. The main transmission unit is located below the support beam I near the center. There are two side parts 212, symmetrically arranged at the left and right ends of the support beam I. The height of the side parts 212 is slightly higher than the upper surface of the support beam I. The main transmission unit 211 includes a drive pulley. The drive device 22 is connected to the drive pulley and is used to drive the drive pulley to rotate. Idler pulleys and tension pulleys are respectively arranged on the left and right sides of the drive pulley. The side parts 212 include several idler pulleys. The synchronous belt I is wound around the periphery of the support beam I through the drive pulley, idler pulleys, and tension pulleys. The drive pulley is used to drive the synchronous belt I to rotate. The idler pulleys are used to guide and tension the synchronous belt I. The tension pulleys are used to adjust the tension of the synchronous belt I.

[0040] Furthermore, the upper end of the support beam I is provided with a guide strip I, and the upper end surface of the guide strip I is provided with a groove. The width of the groove matches the synchronous belt I. The guide strip I is used to guide the movement of the synchronous belt I.

[0041] Furthermore, the supporting beam I is made of aluminum profile.

[0042] Furthermore, the main drive unit 211 includes mounting plates I fixedly installed on the front and rear sides of the support beam I, respectively. The mounting plates I are used to install the drive pulley, idler pulley and tension pulley of the main drive unit 211. The height of the tension pulley is adjustable relative to the height of the drive pulley.

[0043] Furthermore, the mounting plate I is provided with a mounting block, and an adjusting pin is inserted inside the mounting block. The axle of the tension pulley is provided with a threaded hole that matches the adjusting pin. The lower end of the adjusting pin is connected to the threaded hole. By turning the adjusting pin, the length of its lower end extending into the threaded hole is adjusted to adjust the distance between the mounting block and the tension pulley, thereby tensioning or loosening the synchronous belt I.

[0044] Furthermore, the drive device 22 includes a motor, the output end of which is fixedly connected to the main drive shaft. The main drive shaft passes through the drive pulley and is fixedly connected to it. An encoder is provided at the end of the main drive shaft. The encoder ensures that the first and second conveying units operate synchronously, resulting in smoother and more stable transmission of the printing media.

[0045] Furthermore, the side portion 212 includes mounting plates II fixedly installed on the front and rear sides of the support beam I, respectively. The mounting plates II are used to install idler wheels of the side portion 212. The side portion 212 has two idler wheels, one of which is located on the outer side of the end of the support beam I and is slightly higher than the upper surface of the support beam I, and the other idler wheel is located below the end of the support beam I.

[0046] In this embodiment, the first transmission unit is located on the right side of the optical detection device 4, referring to... Figures 1 to 4 As shown, the motor rotates counterclockwise, which drives the drive shaft to rotate counterclockwise, thereby driving the drive pulley to rotate counterclockwise. The drive pulley drives the idler pulley and tension pulley to rotate counterclockwise through the synchronous belt I. The synchronous belt I also rotates counterclockwise, thereby conveying the glass plate placed above the synchronous belt I from right to left.

[0047] Furthermore, the second conveying unit includes a support beam II, a main drive unit 211, side parts 212, a first clearance part 213, and a synchronous belt II. The main drive unit 211 is located below the support beam II. There are two side parts 212, symmetrically arranged at the left and right ends of the support beam II. The height of the side parts 212 is slightly higher than the upper surface of the support beam II. An ink collection trough 31 is provided on the conveying platform 2 below the printing carriage 3. The length of the ink collection trough 31 matches the width of the conveying platform 2. The first clearance part 213 is disposed on the left side of the main transmission part and located below the printing carriage 3. The first clearance part is used to avoid the ink receiving trough 31. The upper end of the first clearance part 213 is flush with the upper end of the side part 212 and the lower end is lower than the lower end of the side part 212. The first clearance part 213 includes several idler pulleys. The synchronous belt II is connected to the driving pulley, tensioning pulley and idler pulley of the second transmission part and is sleeved on the periphery of the support beam II. The idler pulley is used to guide and tension the synchronous belt II.

[0048] In this embodiment, when the printhead on the printing carriage 3 is being cleared by ink pressure, there is no printing media above the transport platform 2. If ink droplets from the printhead fall directly onto the transport platform 2, they will contaminate it, leading to contamination of the printing media during subsequent transport. Therefore, an ink collection trough 31 is provided below the printing carriage 3 to collect ink droplets. The printing carriage 3 can move back and forth along the guide beam to print at a suitable position. The width of the ink collection trough 31 spans the transport platform 2, ensuring that it can collect ink at any position when the printing carriage 3 is spraying ink. Therefore, the second conveyor unit has a first clearance part located at the position of the ink collection trough 31 to avoid obstructing the ink collection trough 31.

[0049] Furthermore, the first clearance part includes mounting plates III respectively fixedly installed on the front and rear sides of the support beam II. The mounting plates III are used to install idler wheels of the first clearance part. The first clearance part has five idler wheels, of which four idler wheels are used to guide and tension the part of the synchronous belt II located above the support beam II, and the other idler wheel is used to tension the part of the synchronous belt II located below the support beam II.

[0050] Furthermore, two of the idler wheels are spaced at equal heights and are slightly higher than the upper surface of the support beam II. Two other idler wheels are located below the aforementioned two idler wheels, and a fifth idler wheel is located below the aforementioned four idler wheels and in the middle of the two idler wheels that are spaced apart.

[0051] Furthermore, the support beam II is made of aluminum profile, and the support beam II has a slot at the first clearance part, or the support beam II is interrupted at the first clearance part by a set distance.

[0052] In this embodiment, the motor rotates counterclockwise, which drives the main drive shaft to rotate counterclockwise, thereby driving the drive pulley to rotate counterclockwise. The drive pulley drives the idler pulley and tension pulley to rotate counterclockwise through the synchronous belt II. The synchronous belt II also rotates counterclockwise, thereby conveying the glass plate placed above the synchronous belt II from right to left.

[0053] Furthermore, the upper end of the support beam II is provided with a guide strip II, and the upper end surface of the guide strip II is provided with a groove. The width of the groove matches the synchronous belt II. The guide strip II is used to guide the movement of the synchronous belt II.

[0054] Example 3:

[0055] Based on Embodiment 2, a quality inspection device 5 is also installed on the base 1. The quality inspection device 5 is located on the left side of the printing carriage 3 and spans the conveying platform 2 longitudinally. The second conveying part also includes a second clearance part 214, which is located below the quality inspection device 5 and is used to clear the inspection position of the quality inspection device 5. The second clearance part 214 includes several idler wheels, which are used to guide and tension the part of the synchronous belt II located above the support beam II. The upper end of the second clearance part 214 is flush with the upper end of the side part 212.

[0056] In this embodiment, the quality inspection device 5 is used to inspect whether the printed pattern is qualified. When inspecting the printed pattern, the quality inspection device 5 needs to maintain a certain degree of light transmittance below the glass plate, that is, the light transmittance of the printed pattern needs to be clearly distinguishable from that of other glass areas, so as to extract, identify and inspect the printed pattern. Therefore, the conveying device below the printing medium at the quality inspection device 5 needs to be spaced a certain distance from the printing medium, that is, an empty slot needs to be set. Therefore, a second clearance part is set, referring to... Figure 5 As shown, the synchronous belt II bends downward at the second clearance section, thus creating a certain distance between it and the printing medium.

[0057] Furthermore, the second clearance part 214 includes mounting plates IV that are fixedly installed on the front and rear sides of the support beam II respectively. The mounting plates IV are used to install the idler wheels of the second clearance part 214. The second clearance part 214 has three idler wheels, two of which are spaced at equal heights and are slightly higher than the upper surface of the support beam II, and the other idler wheel is located in the middle and below the two idler wheels.

[0058] It should be noted that the above detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0059] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments described in this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0060] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0061] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0062] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, such as rotated 90 degrees or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0063] In the detailed description above, reference has been made to the accompanying drawings, which form part of this document. In the drawings, similar symbols typically identify similar parts unless the context otherwise indicates otherwise. The illustrated embodiments described in the detailed specification, drawings, and claims are not intended to be limiting. Other embodiments may be used and other changes may be made without departing from the spirit or scope of the subject matter presented herein.

[0064] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An inkjet printing device, characterized in that: The system includes a conveyor platform (2), a printing carriage (3), and an optical inspection device (4). The conveyor platform (2) is located at the upper end of the base (1) and is used to carry and convey the printing medium. The printing carriage (3) and the optical inspection device (4) are mounted on the base (1) and located above the conveyor platform (2). The optical inspection device (4) is located above the right end of the conveyor platform (2) and spans the conveyor platform (2) longitudinally. The printing carriage (3) is located to the left of the optical inspection device (4) and can move back and forth relative to the conveyor platform (2). The platform (2) includes a drive unit (22) and several conveying devices (21) arranged side by side at intervals. The conveying devices (21) are fixedly installed on the base (1) by a fixing device (23). The height of the fixing device (23) is adjustable. The drive unit (22) drives the conveying devices (21) to rotate, thereby conveying the printing medium from right to left. The optical detection device (4) includes a transmitting end located below the printing medium and a detection end located above the printing medium. The conveying device (21) includes a first conveying section and a second conveying section located to the left of the first conveying section. The transmitting end of the optical detection device (4) is located between the first and second transmitting parts. The first and second transmitting parts are respectively connected to the driving device (22). The driving device (22) drives the first and second transmitting parts to perform synchronous rotational motion. The first transmitting part includes a support beam I, a main transmission part (211), a side part (212), and a synchronous belt I. The main transmission part is located below the support beam I near the middle. There are two side parts (212) symmetrically arranged at the left and right ends of the support beam I. 2) The height is slightly higher than the upper surface of the support beam I. The main transmission part (211) includes a drive pulley. The drive device (22) is connected to the drive pulley and is used to drive the drive pulley to rotate. Idler pulleys and tension pulleys are respectively provided on the left and right sides of the drive pulley. The side part (212) includes several idler pulleys. The synchronous belt I is wrapped around the periphery of the support beam I through the drive pulley, idler pulleys and tension pulleys. The drive pulley is used to drive the synchronous belt I to rotate. The idler pulleys are used to guide and tension the synchronous belt I. The tension pulleys are used to adjust the tension of the synchronous belt I.The second conveying unit includes a support beam II, a main drive unit (211), a side part (212), a first clearance part (213), and a synchronous belt II. The main drive unit (211) is located below the support beam II. There are two side parts (212) symmetrically arranged at the left and right ends of the support beam II. The height of the side parts (212) is slightly higher than the upper surface of the support beam II. An ink collection trough (31) is provided on the conveying platform (2) below the printing carriage (3). The length of the ink collection trough (31) matches the width of the conveying platform (2). The first clearance part (213) is located on the left side of the main transmission part and below the printing carriage (3). The first clearance part is used to avoid the ink receiving trough (31). The upper end of the first clearance part (213) is flush with the upper end of the side part (212), and the lower end is lower than the lower end of the side part (212). The first clearance part (213) includes several idler pulleys. The synchronous belt II is connected to the driving pulley, tensioning pulley and idler pulley of the second transmission part and is sleeved on the periphery of the support beam II. The idler pulley is used to guide and tension the synchronous belt II.

2. The inkjet printing device according to claim 1, characterized in that: The main drive unit (211) includes mounting plates I fixedly installed on the front and rear sides of the support beam I respectively. The mounting plates I are used to install the drive pulley, idler pulley and tension pulley of the main drive unit (211). The height of the tension pulley is adjustable relative to the height of the drive pulley.

3. The inkjet printing device according to claim 2, characterized in that: The mounting plate I is provided with a mounting block, and an adjusting pin is inserted inside the mounting block. The axle of the tension pulley is provided with a threaded hole that matches the adjusting pin, and the lower end of the adjusting pin is connected to the threaded hole.

4. The inkjet printing device according to claim 1, characterized in that: The first clearance part includes mounting plates III that are fixedly installed on the front and rear sides of the support beam II respectively. The mounting plates III are used to install idler wheels of the first clearance part. The first clearance part has five idler wheels, of which four idler wheels are used to guide and tension the part of the synchronous belt II located above the support beam II, and the other idler wheel is used to tension the part of the synchronous belt II located below the support beam II.

5. An inkjet printing device according to claim 2, characterized in that: A quality inspection device (5) is also installed on the base (1). The quality inspection device (5) is located on the left side of the printing trolley (3) and spans the conveying platform (2) longitudinally. The second conveying part also includes a second avoidance part (214). The second avoidance part (214) is located below the quality inspection device (5) and is used to avoid the inspection position of the quality inspection device (5). The second avoidance part (214) includes several idler wheels. The idler wheels are used to guide and tension the part of the synchronous belt II located above the support beam II. The upper end of the second avoidance part (214) is flush with the upper end of the side part (212).

6. The inkjet printing device according to claim 1, characterized in that: The drive device (22) includes a motor, the output end of which is fixedly connected to the main drive shaft. The main drive shaft passes through the drive pulley and is fixedly connected to the drive pulley. An encoder is provided at the end of the main drive shaft.

7. The inkjet printing device according to claim 1, characterized in that: The fixing device (23) includes a fixing seat (231) and an adjusting block (232). The lower end of the fixing seat (231) is fixedly connected to the base (1), and the upper end of the fixing seat (231) is fixedly connected to the conveying device (21). The adjusting block (232) is located above the fixing seat (231) and fixedly installed on the conveying device (21). An adjusting pin (233) is passed through the adjusting block (232), and the lower end of the adjusting pin (233) abuts against the fixing seat (231).

8. An inkjet printing device according to claim 1, characterized in that: The base (1) includes several longitudinally arranged and spaced apart from each other. The upper end of the mounting bracket is fixedly mounted with a mounting plate (11), and the lower end of the fixing device (23) is fixedly connected to the mounting plate (11).

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