An inkjet printer

Abstract

The application discloses an inkjet printer, which comprises a machine body, a material rack arranged on one side of the machine body and used for stacking paper required for printing, a printing table arranged in the middle of the machine body, and a printing unit arranged on the machine body and used for printing the paper to be printed placed on the printing table, wherein the printing unit is provided with a grabbing unit close to the side of the material rack, and a discharging port is arranged on the side of the machine body far from the material rack. The printer can realize the integration of the printing process, i.e. the automatic operation of feeding, printing and discharging, thereby improving the printing efficiency and saving the labor intensity of frequent operation.

Description

Technical Field

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

[0002] Inkjet printers are devices that use inkjet equipment to spray ink onto paper to form patterns. However, current inkjet printers generally require manual paper loading and unloading, which is extremely inconvenient for continuous and large-volume printing. To address this, we have designed an inkjet printer.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is the closest prior art. Summary of the Invention

[0004] The purpose of this invention is to provide an inkjet printer to solve the problem mentioned in the background art that current inkjet printing equipment generally requires manual paper loading and unloading, which is extremely inconvenient for continuous and large-volume printing.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an inkjet printer, comprising a body, and further comprising:

[0006] The material rack, located on one side of the machine, is used to stack the paper required for printing.

[0007] The printing table, located in the middle of the machine body, is used to hold the paper to be printed;

[0008] The printing unit is mounted on the machine body and is used to print the paper to be printed placed on the printing table. The printing unit is provided with a gripping unit near the material rack and is used to grip the paper to be printed on the material rack and place it on the printing table.

[0009] The feeding port is located on the side of the machine body away from the material rack, and is used to feed the printed paper from the printing table after printing is completed.

[0010] Preferably, the printing unit includes:

[0011] A printhead assembly is positioned above the print table and is inclined in the direction of the print table layout. It is used to print on the paper to be printed. A mounting bracket for the printhead assembly is rotatably mounted above the printhead assembly. The printhead assembly is tilted on the mounting bracket at an adjustable angle via a rotating shaft.

[0012] The power unit, mounted inside the machine body, is used to move the mounting frame, thereby moving the print head assembly to print on the paper to be printed.

[0013] Preferably, the gripping unit is configured as a cylinder fixed to the side of the mounting frame near the material rack, and the telescopic end of the cylinder is fixed with a first suction cup via a connecting plate.

[0014] Preferably, the material rack is hollow, and a support plate for stacking papers to be printed is slidably arranged in the hollow part of the material rack. A lifting mechanism is provided between the support plate and the mounting frame for the mounting frame to drive the gripping unit to move back and forth once to perform one gripping, thereby raising the support plate by one distance.

[0015] Preferably, the lifting mechanism includes:

[0016] Two sets of bearing shafts are rotatably mounted on both sides of the bearing plate via collars. Each end of the bearing shaft is equipped with a gear chain, and each end of the gear chain is equipped with a chain gear for driving its rotation. A gear shaft is provided between the chain gears located on the same side and at the same height.

[0017] The gear assembly is located inside the machine body, between the gear shaft and the mounting bracket, on the side closer to the printing table.

[0018] Preferably, the gear assembly includes:

[0019] The first coordinating shaft is coaxially arranged on the chain gear at the inner end. The first coordinating shaft is provided with a first coordinating gear, and a second coordinating gear is meshed with the first coordinating gear on the side near the bearing plate.

[0020] The second coordinating shaft is located at the center of the second coordinating gear and extends into the inner side of the machine body, where the third coordinating gear is located.

[0021] An external gear ring is coaxially disposed outside the third coordinating gear. A bushing is disposed at the center of the external gear ring shaft. The bushing is sleeved on the second coordinating shaft and the bushing rotates through the gear ring.

[0022] The power rack is located at the bottom of the mounting bracket. When the power rack moves to the position of the external gear ring, it meshes with the external gear ring to drive the external gear ring to rotate.

[0023] The limiting component is set on the inner wall of the outer gear ring. When the outer gear ring rotates in the forward direction, it can drive the third coordinating gear to rotate. When the outer gear ring rotates in the reverse direction, it will not drive the third coordinating gear to rotate.

[0024] Preferably, the printing table is hollowed out, a second suction cup is provided at the lower end of the printing table, a printing frame with a support is provided at the lower end of the printing table, and a transverse component is provided on the printing frame for driving the printing frame to move laterally. The transverse component includes a second threaded rod that is threadedly connected to the printing frame, and a transverse motor is provided at the end of the second threaded rod for driving it to rotate.

[0025] Preferably, the print table and the print stand are rotatably connected by a rotating shaft. Both ends of the rotating shaft are provided with feeding components that pass through the space between the print stand and the print table. These components are used to feed the printed paper from the print head assembly to the feeding port for discharge when the print table is moved to its initial position by the aforementioned traversing component after printing is completed.

[0026] Preferably, the feeding assembly includes:

[0027] Two sets of rotating gears are fixedly mounted coaxially at both ends of the rotating shaft;

[0028] Two sets of sliding racks are respectively meshed with two sets of rotating gears and are slidably mounted on the printing frame. The upper ends of the sliding racks extend to both sides of the printing table.

[0029] The plate is rotated on both sides of the printing table, with its lower end face abutting against the upper end of the sliding rack.

[0030] The power unit is located between the print frame and the print table, and is used to drive the print table to rotate.

[0031] Preferably, the power unit includes an electric telescopic rod, which is rotatably mounted on the printing frame via a rotating plate. A connecting shaft is fixedly mounted at the lower end of the printing table, and a collar is provided at the telescopic end of the electric telescopic rod, which is sleeved on the connecting shaft.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] This invention, through the combination of a printing unit and a gripping unit, enables the integrated and automated printing process, including feeding, printing, and unloading, thereby improving printing efficiency and reducing the labor intensity of frequent manual operations.

[0034] This invention, through the adjustable rotation setting of the print head assembly, allows for the adjustment of the clarity of the printed pattern without changing the number of print head assemblies, thereby achieving a technological improvement and breakthrough from a physical perspective.

[0035] By using a lifting mechanism, this invention can automatically load materials while the gripping unit is working, and can load materials in one gripping operation with the gripping unit, thus making the automated operation more closely coordinated. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0037] Figure 2 This is a diagram of the overall internal structure of the present invention;

[0038] Figure 3 This is a structural diagram of the lifting mechanism of the present invention;

[0039] Figure 4 This is a structural diagram of the lifting mechanism from another perspective of the present invention;

[0040] Figure 5 This is a structural diagram of the lifting mechanism from another perspective of the present invention;

[0041] Figure 6 This is a cross-sectional view showing the connection between the second and third coordinating gears of the present invention.

[0042] Figure 7 This is a front view of the feeding assembly of the present invention;

[0043] Figure 8 This is a diagram showing the angle relationship between the printhead and the paper during normal printing.

[0044] Figure 9 This is a diagram showing the angle relationship between the printhead and the paper in this invention;

[0045] Figure 10 for Figure 4 Enlarged view of point A in the middle;

[0046] Figure 11 for Figure 5 Enlarged view of section B in the middle.

[0047] Reference numerals: 1-Machine body; 2-Material rack; 21-Bearing plate; 22-Lifting mechanism; 221-Bearing shaft; 222-Gear chain; 223-Chain gear; 224-Gear shaft; 225-Gear assembly; 2251-First coordinating shaft; 2252-First coordinating gear; 2253-Second coordinating gear; 2254-Second coordinating shaft; 2255-Third coordinating gear; 2256-External gear ring; 2257-Shaft sleeve; 2258-Power rack; 226-Limiting component; 2261-Limiting shaft; 2262-Limiting clip; 2263-First limiting post; 2264-Second limiting post ; 227-Connector; 2271-Shaft; 2272-Power helical gear; 3-Printing table; 31-Second suction cup; 32-Printing frame; 33-Transverse movement assembly; 331-Second threaded rod; 332-Transverse movement motor; 34-Rotating shaft; 35-Unloading assembly; 351-Rotating gear; 352-Sliding rack; 353-Panel; 354-Electric telescopic rod; 355-Connecting shaft; 356-Collar; 4-Printing unit; 41-Printing nozzle assembly; 411-Printing nozzle; 42-Mounting bracket; 43-Power component; 5-Unloading port; 6-Gripping unit; 61-Cylinder; 62-First suction cup; Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] Please see Figure 1-11 The present invention provides a technical solution: an inkjet printer, including a body 1, and further comprising:

[0050] Material rack 2, located on one side of machine body 1, is used to stack the paper required for printing;

[0051] Printing table 3, located in the middle of the machine body 1, is used to hold paper to be printed;

[0052] Printing unit 4 is mounted on the machine body 1 and is used to print the paper to be printed placed on the printing table 3. The printing unit 4 is provided with a gripping unit 6 near the material rack 2 and is used to grip the paper to be printed on the material rack 2 and place it on the printing table 3.

[0053] The feeding port 5 is located on the side of the machine body 1 away from the material rack 2, and is used to feed the printed paper from the printing table 3 after printing is completed.

[0054] Meanwhile, the printing unit 4 includes:

[0055] A print head assembly 41 is positioned above the print table 3 and is inclined in the direction of the print table 3. It is used to print on the paper to be printed. A mounting bracket 42 for the print head assembly 41 is rotatably mounted above the print head assembly 41. The print head assembly 41 is tilted at an adjustable angle on the mounting bracket 42 via a rotating shaft. Multiple rows of print heads 411 are mounted on the print head assembly 41. The upper end of the rotating shaft passes through the mounting bracket 42 and is suspended on the mounting bracket 42 by a limiting piece. A threaded hole for connecting the rotating shaft is opened on one side of the mounting bracket 42. A threaded connecting rod is threaded into the threaded hole. After the print head assembly 41 is tilted, the rotating shaft can be fixed by tightening the threaded connecting rod.

[0056] Among them, such as Figure 8 , Figure 9 As shown, Figure 8 When the printhead 411 and the paper are parallel, there are four rows of printheads 411 with a spacing of d. Figure 9When the tilt angle α between the paper and the print head 411 is 145 degrees, there are six rows of print heads 411 at a distance d. This increases the number of print heads 411 within the same spacing, improving the quality of the printed product. Since the print head 411 has a fixed size in actual production, to make the printed pattern clearer, the requirement is to have more rows of print heads 411 within the distance d. However, changing the size of the print head 411 is technically difficult. Therefore, tilting the print head 411 increases the number of rows within the distance d without changing its size. The larger the angle α, the more rows there are, and the clearer the pattern.

[0057] The power unit 43 is mounted inside the machine body 1 and is used to drive the mounting frame 42 to move, thereby moving the print head assembly 41 to print on the paper to be printed.

[0058] The power component 43 includes:

[0059] A crossbeam with a slide rail is fixed on the machine body 1, and the mounting bracket 42 is slidably mounted on the crossbeam;

[0060] The first threaded rod is threadedly connected to the mounting bracket 42. The threaded rod is driven to rotate by a rotating motor to move the mounting bracket 42 on the crossbeam.

[0061] Meanwhile, the gripping unit 6 is configured as a cylinder 61 fixed on the side of the mounting frame 42 near the material rack 2, and the telescopic end of the cylinder 61 is fixed with a first suction cup 62 through a connecting plate.

[0062] When gripping, when the first suction cup 62 moves directly above the material rack 2, the cylinder 61 will drive the first suction cup 62 to move down to the topmost sheet of paper to be printed, and grip it. Then the cylinder 61 will drive it to move back to its original position, and then the power component 43 will drive the first suction cup 62 to move towards the printing table 3.

[0063] In addition, the material rack 2 is hollow, and a support plate 21 for stacking the paper to be printed is slidably arranged up and down in the hollow position of the material rack 2. A lifting mechanism 22 is provided between the support plate 21 and the mounting frame 42 for the mounting frame 42 to drive the gripping unit 6 to move back and forth once to perform one gripping and raise the support plate 21 by one distance.

[0064] The lifting mechanism 22 includes:

[0065] Two sets of bearing shafts 221 are rotatably mounted on both sides of the bearing plate 21 via collars. Each end of the bearing shaft 221 is provided with a gear chain 222. Each end of the gear chain 222 is provided with a chain gear 223 for driving its rotation. A gear shaft 224 is provided between the chain gears 223 located on the same side and at the same height. The gear shaft 224 is rotated via a collar, which is fixed to the material rack 2.

[0066] The gear assembly 225 is located inside the machine body 1, between the gear shaft 224 and the mounting frame 42, near the printing table 3. When the mounting frame 42 drives the gripping unit 6 to move to the material rack 2, it can lift the support plate 21 to move upward a certain distance. After the gripping unit 6 grips a piece of paper to be printed, it will not drive the gear assembly 225 to rotate during the process of returning to the printing table 3. This allows the gripping unit 6 to perform one gripping operation for each round trip, causing the support plate 21 to rise one distance, thus achieving continuous feeding.

[0067] Meanwhile, the gear assembly 225 includes:

[0068] The first coordinating shaft 2251 is coaxially arranged on the chain gear 223 at the inner end. The first coordinating shaft 2251 is provided with a first coordinating gear 2252. The first coordinating gear 2252 is meshed with a second coordinating gear 2253 on the side of the first coordinating gear 2252 near the bearing plate 21.

[0069] The second coordinating shaft 2254 is located at the axis of the second coordinating gear 2253 and extends into the machine body 1. A third coordinating gear 2255 is provided therein. The third coordinating gear 2255 rotates through a sleeved collar, which is fixed to the material rack 2.

[0070] An external gear ring 2256 is coaxially disposed outside the third coordinating gear 2255. A bushing 2257 is disposed at the center of the shaft 224 of the external gear ring 2256. The bushing 2257 is sleeved on the second coordinating shaft 2254 and the bushing 2257 rotates through the bushing. The bushing is also fixed on the material rack 2.

[0071] The power rack 2258 is located at the bottom of the mounting bracket 42. When the power rack 2258 moves to the position of the external gear ring 2256, it meshes with the external gear ring 2256 to drive the external gear ring 2256 to rotate.

[0072] The limiting member 226 is set on the inner wall of the outer gear ring 2256. When the outer gear ring 2256 rotates in the forward direction, it can drive the third coordinating gear 2255 to rotate. When the gripping unit 6 moves from the printing table 3 to the material rack 2, the power rack 2258 drives the outer gear ring 2256 to rotate. When the outer gear ring 2256 rotates in the reverse direction, it will not drive the third coordinating gear 2255 to rotate. When the gripping unit 6 moves from the material rack 2 to the printing table 3, the power rack 2258 drives the outer gear ring 2256 to rotate.

[0073] The limiting member 226 includes a limiting shaft 2261, which is fixedly mounted on the inner wall of the outer gear ring 2256. A limiting strip 2262 is rotatably mounted on the limiting shaft 2261. The other end of the limiting strip 2262 is engaged in the tooth groove of the third coordinating gear 2255. A first limiting post 2263 is provided at the lower end of the limiting strip 2262. The first limiting post 2263 is fixedly mounted on the inner wall of the outer gear ring 2256. A second limiting post 2 is provided on the inner wall of the outer gear ring 2256. 264, the second limiting post 2264 is located at the upper end of the limiting strip 2262, and the limiting strip 2262 is tilted when it rotates to the second limiting post 2264. The first limiting post 2263 is set to limit the downward rotation of the limiting strip 2262, thereby realizing the unidirectional rotation of the third coordinating gear 2255 and the external gear ring 2256. The second limiting post 2264 is set to enable the limiting strip 2262 to fall and be inserted into the tooth groove of the third coordinating gear 2255 under its own gravity.

[0074] When the power rack 2258 drives the outer gear ring 2256 to rotate in the forward direction, the limiting member 226 can drive the third coordinating gear 2255 to rotate, thereby driving the second coordinating gear 2253 and the first coordinating gear 2252 to rotate, thereby driving the gear chain 222 to rotate, so that the support plate 21 rises. At the same time, the setting of the limiting member 226 can ensure that the support plate 21 can only move upward and will not fall downward.

[0075] When the support plate 21 moves to the top and there is no paper on it, the support plate 21 is moved to the bottom of the material rack 2 for feeding. At this time, the limit strip 2262 can slide on the limit shaft 2261, and a limit plate can be set at the outer end of the limit shaft 2261. A limit spring is sleeved on the limit shaft 2261 between the limit strip 2262 and the limit plate to prevent the limit strip 2262 from sliding outward. When the limit is released, the limit strip 2262 can be pulled outward to release the engagement with the third coordinating gear 2255. At this time, the support plate 21 loses the limit and can automatically slide to the bottom of the material rack 2. Then the limit strip 2262 is re-engaged into the tooth groove of the third coordinating gear 2255. The pulling of the limit strip 2262 can be carried out manually or with the help of a telescopic power machine.

[0076] A connector 227 is provided between the first coordinating shafts 2551 located at both ends of the bearing plate 21 for synchronizing the rotation of the gear chains 222 on both sides. The connector 277 includes a shaft 2771 with a helical gear, which rotates through a collar. The collar is fixedly mounted on the material rack 2. The end of the first coordinating shaft is provided with a power helical gear 2772 that meshes with the helical gear on the shaft 2771.

[0077] The printing table 3 is hollowed out. A second suction cup 31 is provided at the lower end of the printing table 3. A printing frame 32 with the suction cup 32 is provided at the lower end of the printing table 3. A transverse component 33 is provided on the printing frame 32 for driving the printing frame 32 to move laterally. The transverse component 33 includes a second threaded rod 331 that is threadedly connected to the printing frame 32. A transverse motor 332 for driving the second threaded rod 331 to rotate is provided at the end of the second threaded rod 331.

[0078] During printing, the transverse component 33 first grips the paper to be printed from the material table using the gripping unit 6. Then, the power component 43 moves the paper to a position directly above the material table and places it there. The paper is then attracted by the second suction cup 31 below the printing table 3. The transverse motor then moves the printing table 3 to a position directly below the print head assembly 41. The power component 43 then moves the print head assembly 41 to print the paper on the printing table 3. After printing, the transverse component 33 moves the printing table 3 back to its original position. The gripping unit 6 then picks up the paper, and the power component 43 moves the printed paper to the unloading port 5 for discharge, completing one printing operation. The power component 43 then moves the gripping unit 6 to the material rack 2 for the next printing operation.

[0079] Meanwhile, the printing table 3 and the printing frame 32 are rotatably connected by a rotating shaft 34. The two ends of the rotating shaft 34 are connected between the printing frame 32 and the printing table 3 and a feeding assembly 35 is provided. This assembly is used to feed the printed paper on the printing table 3 to the feeding port 5 for discharge when the printing nozzle group 41 finishes printing and the above-mentioned transverse component 33 moves the printing table 3 to the initial position.

[0080] In addition, the feeding assembly 35 includes:

[0081] Two sets of rotating gears 351 are coaxially fixed at both ends of the rotating shaft;

[0082] Two sets of sliding racks 352 are respectively meshed with two sets of rotating gears 351 and are slidably mounted on the printing frame 32. The upper ends of the sliding racks 352 extend to both sides of the printing table 3.

[0083] The hinge plate 353 is rotatably set on both sides of the printing table 3, and its lower end face abuts against the upper end of the sliding rack 352.

[0084] The power unit is located between the print frame 32 and the print table 3, and is used to drive the print table 3 to rotate.

[0085] Finally, the power unit includes an electric telescopic rod 354, which is rotatably mounted on the printing frame 32 via a rotating plate. A connecting shaft 355 is fixedly mounted at the lower end of the printing table 3. A collar 356 is provided at the telescopic end of the electric telescopic rod 354, and the collar 356 is sleeved on the connecting shaft 355.

[0086] In actual operation, when the printing is completed, the electric telescopic rod 354 extends, which can drive the printing table 3 to rotate, thereby tilting the printing table 3. The paper on it will then slide down to the feed port 5. At the same time, when the printing table 3 rotates, it will drive the rotating shaft to rotate, thereby rotating the rotating gear 351 and causing the sliding rack 352 to slide upward, thereby pushing the opening plate 353 upward, so that the opening plate 353 rotates from a horizontal state to a vertical state with the printing table 3. This prevents the paper from falling from both sides of the printing table 3 during the sliding process. Then, when it returns to a horizontal state, the opening plate 353 is reset to a horizontal state that is flush with the printing table 3. This way, there will be no movement interference with the printing equipment when it moves to print.

[0087] Compared to the above method of unloading after printing by gripping unit 6, unloading by unloading component 35 can avoid conflicts between loading and unloading. That is, after printing is completed, unloading is completed by unloading component 35. At this time, gripping unit 6 can return to material rack 2 for the next loading, while unloading component 35 can load synchronously. This can speed up the overall printing speed and save time. In this way, better processing efficiency can be achieved when printing a large number of sheets of paper.

[0088] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0089] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An inkjet printer, comprising a body (1), characterized in that, Also includes: Material rack (2), located on one side of the machine body (1), is used to stack the paper required for printing; The printing table (3) is located in the middle of the machine body (1) and is used to place the paper to be printed; The printing unit (4) is set on the machine body (1) and is used to print the paper to be printed placed on the printing table (3). The printing unit (4) is provided with a gripping unit (6) on the side near the material rack (2) to grip the printing paper on the material rack (2) and put it on the printing table (3). The feeding port (5) is located on the side of the machine body (1) away from the material rack (2) and is used to feed the printing paper on the printing table (3) from the feeding port (5) after printing is completed; The lower end of the printing table (3) is provided with a printing frame (32) to support it. The printing frame (32) is provided with a transverse component (33) for driving the printing frame (32) to move laterally. The transverse component (33) includes a second threaded rod (331) that is threadedly connected to the printing frame (32). The end of the second threaded rod (331) is provided with a transverse motor (332) for driving it to rotate. The printing table (3) and the printing frame (32) are rotatably connected by a rotating shaft (34). The two ends of the rotating shaft (34) pass through the printing frame (32) and the printing table (3) and a feeding assembly (35) is provided. This assembly is used to feed the printed paper on the printing table (3) to the feeding port (5) for discharge when the printing nozzle group (41) finishes printing and the above-mentioned transverse component (33) moves the printing table (3) to the initial position. The feeding assembly (35) includes: Two sets of rotating gears (351) are fixedly mounted coaxially at both ends of the rotating shaft; Two sets of sliding racks (352) are respectively engaged with two sets of rotating gears (351) and are slidably mounted on the printing frame (32). The upper ends of the sliding racks (352) extend to both sides of the printing table (3). The hinge plate (353) is rotatably set on both sides of the printing table (3), and its lower end face abuts against the upper end of the sliding rack (352); The power unit is located between the print frame (32) and the print table (3) and is used to drive the print table (3) to rotate.

2. An inkjet printer according to claim 1, characterized in that, The printing unit (4) includes: A print head assembly (41) is set above the print table (3) and is inclined in the direction of the print table (3) for printing on the paper to be printed. A mounting bracket (42) for the print head assembly (41) is rotatably set above the print head assembly (41). The print head assembly (41) is set on the mounting bracket (42) with an adjustable tilt angle via a rotating shaft. The power unit (43) is installed inside the machine body (1) and is used to drive the mounting frame (42) to move, thereby moving the print head assembly (41) to print the paper to be printed.

3. An inkjet printer according to claim 2, characterized in that, The gripping unit (6) is configured as a cylinder (61) fixed on the side of the mounting frame (42) near the material rack (2), and the telescopic end of the cylinder (61) is fixed with a first suction cup (62) through a connecting plate.

4. An inkjet printer according to claim 2, characterized in that, The material rack (2) is hollow. A support plate (21) for stacking paper to be printed is slidably arranged at the hollow position of the material rack (2). A lifting mechanism (22) is provided between the support plate (21) and the mounting frame (42) for the mounting frame (42) to drive the gripping unit (6) to move back and forth once to perform one gripping and raise the support plate (21) by one distance.

5. An inkjet printer according to claim 4, characterized in that, The lifting mechanism (22) includes: Two sets of bearing shafts (221) are rotatably mounted on both sides of the bearing plate (21) via collars. Gear chains (222) are provided at the ends of the bearing shafts (221) at both ends. Chain gears (223) for driving the chain chain (222) to rotate are provided at both ends of the chain chain (222). A gear shaft (224) is provided between the chain gears (223) located on the same side and at the same height. The gear assembly (225) is located between the gear shaft (224) and the mounting bracket (42) on the inside of the body (1) and near the printing table (3).

6. An inkjet printer according to claim 5, characterized in that, The gear assembly (225) includes: The first coordinating shaft (2251) is coaxially arranged on the chain gear (223) at the inner end. The first coordinating shaft (2251) is provided with a first coordinating gear (2252). The first coordinating gear (2252) is meshed with a second coordinating gear (2253) on the side of the first coordinating gear (2252) near the bearing plate (21). The second coordinating shaft (2254) is located at the center of the second coordinating gear (2253) and extends into the body (1) to provide a third coordinating gear (2255). An external gear ring (2256) is coaxially disposed outside the third coordinating gear (2255). A bushing (2257) is disposed at the center of the shaft (224) of the external gear ring (2256). The bushing (2257) is sleeved on the second coordinating shaft (2254) and the bushing (2257) rotates through the ring. The power rack (2258) is located at the bottom of the mounting bracket (42). When the power rack (2258) moves to the position of the external gear ring (2256), it meshes with the external gear ring (2256) to drive the external gear ring (2256) to rotate. The limiting member (226) is set on the inner wall of the outer gear ring (2256) so that when the outer gear ring (2256) rotates in the forward direction, it can drive the third coordinating gear (2255) to rotate, and when the outer gear ring (2256) rotates in the reverse direction, it will not drive the third coordinating gear (2255) to rotate.

7. An inkjet printer according to claim 1, characterized in that, The printing table (3) is hollowed out, and a second suction cup (31) is provided at the lower end of the printing table (3).

8. An inkjet printer according to claim 1, characterized in that, The power unit includes an electric telescopic rod (354), which is rotatably mounted on the printing frame (32) via a rotating plate. A connecting shaft (355) is fixedly mounted at the lower end of the printing table (3). A collar (356) is provided at the telescopic end of the electric telescopic rod (354), and the collar (356) is sleeved on the connecting shaft (355).

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